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EP0246985A2 - Process and composition for bleaching laundry - Google Patents

Process and composition for bleaching laundry Download PDF

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Publication number
EP0246985A2
EP0246985A2 EP87420124A EP87420124A EP0246985A2 EP 0246985 A2 EP0246985 A2 EP 0246985A2 EP 87420124 A EP87420124 A EP 87420124A EP 87420124 A EP87420124 A EP 87420124A EP 0246985 A2 EP0246985 A2 EP 0246985A2
Authority
EP
European Patent Office
Prior art keywords
bath
calcium
composition
peroxide
bleaching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87420124A
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German (de)
French (fr)
Other versions
EP0246985A3 (en
EP0246985B1 (en
Inventor
Bernard Dubreux
Françoise Chosson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arkema France SA
Original Assignee
Atochem SA
Elf Atochem SA
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Publication date
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Publication of EP0246985A2 publication Critical patent/EP0246985A2/en
Publication of EP0246985A3 publication Critical patent/EP0246985A3/en
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Publication of EP0246985B1 publication Critical patent/EP0246985B1/en
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/39—Organic or inorganic per-compounds
    • C11D3/3942—Inorganic per-compounds

Definitions

  • the present invention relates to laundry laundering using a peroxide compound.
  • sodium perborate which is by far the most widely used peroxidized bleaching agent to date, is well known to be the source of pollution caused by the presence of boron in waste water.
  • the process according to the invention like the compositions which take part in its realization and are another object of the invention, lead to whitening effects superior to those obtained by the peroxide compounds used to date, while avoiding the pollution due to the most used of them, sodium perborate, and the use of complex activators.
  • the process according to the invention for bleaching laundry in a bath using a peroxide compound is characterized in that bleaching is carried out at a pH of between 10.5 and 12.5 in the presence, as a peroxide compound, of calcium peroxide CaO2 introduced in hydrated form or not so that the quantity of calcium per liter of bath is between 1.10 ⁇ 3 and 1.10 ⁇ 2 atom-gram.
  • the bath may also contain, as is most often the case in practice, in kind and in quantity, all or part of the products designed to be usually present in a bath with detergent action, other than peroxidized bleaching agents, such as as surfactants and accompanying products: alkylbenzenesulfonates, alkylarylbenzenesulfonates, ethoxylated fatty alcohols, anti-redeposition agents, brighteners, perfumes, sequestering agents, alkaline phosphates, etc. .... Examples of known detergents are for example given by Marshall Sittig in DETERGENT MANUFACTURE , Noyes Data Corporation, 1976.
  • the sequestering agents of the alkaline-earth ions are chosen for example from the alkaline salts of polyphosphoric acids such as sodium tripolyphosphate designated in the following by TPP, Na, the alkaline salts of acids polyaminecarboxylic or polyoxycarboxylic acids such as those of ethylenediaminetetraacetic acid, the pentasodium salt of diethylenetriaminepentaacetic acid, the trisodium salt of nitrilotriacetic acid, or even sodium citrate.
  • polyphosphoric acids such as sodium tripolyphosphate designated in the following by TPP, Na
  • the alkaline salts of acids polyaminecarboxylic or polyoxycarboxylic acids such as those of ethylenediaminetetraacetic acid, the pentasodium salt of diethylenetriaminepentaacetic acid, the trisodium salt of nitrilotriacetic acid, or even sodium citrate.
  • TPP Na is well suited in the context of the invention.
  • the bleaching effect is particularly improved by applying the method of the invention when the complexing agent of alkaline earth ions is brought into play in an amount at least equal to that allowing the sequestration of calcium ions in solution in the bath.
  • a composition in accordance with the invention containing a peroxidized compound for laundry bleaching is characterized in that it contains, as peroxidized compound, calcium peroxide CaO2 in hydrated form or not in an amount such that it allows the formation of a bath which, at pH between 10.5 and 12.5 contains per liter of 1.10 ⁇ 3 to 1.10 ⁇ 2 gram atom of calcium in order to carry out the process described above.
  • compositions may also comprise in nature and in quantity all or part of the products known to be usually present in a bath with detergent action, other than the peroxide bleaching compounds hitherto used, such as those mentioned above.
  • It can thus comprise sequestering agents of alkaline earth ions, preferably in an amount at least equal to that corresponding to the sequestration of calcium ions in solution in the bath formed from it.
  • Sodium tripolyphosphate is particularly suitable in a composition according to the invention as sequestering calcium ions.
  • a composition of the invention allows the formation of the bleaching bath by simultaneous addition of its constituents.
  • the formation of the bath can be carried out anyway by bringing its constituents into contact in any order.
  • calcium peroxide in hydrated or non-hydrated form can be added to the other constituents, including the sequestering agent where appropriate, dissolved in water before this addition.
  • the calcium peroxide used in hydrated form or not in carrying out the process or the composition of the invention can be prepared in any known manner. Examples of preparation are indicated for example in the NEW TREATY OF MINERAL CHEMISTRY, P. Pascal, volume IV, 1958, pp. 399-400 or in PEROXIDES, SUPEROXIDES, and OZONIDES of ALKALI and ALKALINE EARTH METALS, Il'ya Ivanovich Vol'nov, Plenum Press, New-York 1966, pp. 58-60.
  • the bleaching operation according to the invention is followed by the rinsing and wringing operations before drying as they are conventionally practiced.
  • the rate of temperature rise from the bath to the plateau temperature from the ambient temperature of approximately 20 ° C. is 10 ° C. per minute.
  • the treated fabric is conventionally separated from the bath, drained and rinsed with water at room temperature before drying, - the pH of the bath is each between 10.5 and 12.5, - the degree of whiteness of the fabric is measured using a spectrophotometer Erichsen GLOSSMASTER No. 507 étallonné a whiteness equal to 90 for the provided magnesium oxide as a reference with the device, - the fabric to be treated has a measured degree of white equal to 41, - calcium peroxide has been used in the form of an octahydrate.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)
  • Cosmetics (AREA)
  • Catalysts (AREA)

Abstract

Procédé et composition pour réaliser le blanchiment de linge au moyen d'un composé peroxydé en bain de pH 10,5 à 12,5 renfermant, comme composé peroxydé, du peroxyde de calcium sous forme hydratée ou non intro­duit de façon à ce que la quantité de calcium par litre de bain soit com­prise entre 1.10⁻³ et 1.10⁻² atome-gramme.Process and composition for carrying out the bleaching of laundry by means of a peroxide compound in a bath of pH 10.5 to 12.5 containing, as peroxide compound, calcium peroxide in hydrated form or not introduced so that the quantity of calcium per liter of bath is between 1.10⁻³ and 1.10⁻² gram-atom.

Description

La présente invention concerne le blanchiment de linge au moyen d'un composé peroxydé.The present invention relates to laundry laundering using a peroxide compound.

Le peroxyde d'hydrogène, les persels ou peroxyhydrates tel qu'en particulier le perborate de sodium, sont connus depuis longtemps pour être utilisés dans le domaine de l'invention.Hydrogen peroxide, persalts or peroxyhydrates such as in particular sodium perborate, have been known for a long time to be used in the field of the invention.

Ces composés ont cependant le désavantage de ne plus être suffisam­ment efficaces à une température inférieure à environ 70°C. Il devient alors nécessaire de leur adjoindre un activeur comme par exemple la tétra-acétyl-­éthylènediamine (TAED), le tétraacétylglycoluryle (TAGU) ou l'α-acétoxy-­α-méthyl-N-Nʹ-diacétylmalonamide (AP 31) décrit dans le brevet français publié sous le numéro 2 363 541.These compounds however have the disadvantage of no longer being sufficiently effective at a temperature below about 70 ° C. It then becomes necessary to add an activator to them such as for example tetra-acetyl-ethylenediamine (TAED), tetraacetylglycoluryl (TAGU) or α-acetoxy-α-methyl-N-Nʹ-diacetylmalonamide (AP 31) described in the French patent published under number 2 363 541.

De tels activeurs, dont la synthèse et le mode de présentation sont coûteux, grèvent fortement l'économie du blanchiment.Such activators, the synthesis and presentation of which are costly, greatly strain the economics of money laundering.

Par ailleurs le perborate de sodium, qui est l'agent de blanchiment peroxydé de loin le plus utilisé à ce jour, est bien connu pour être à l'origine d'une pollution causée par la présence de bore dans les eaux de rejet.Furthermore, sodium perborate, which is by far the most widely used peroxidized bleaching agent to date, is well known to be the source of pollution caused by the presence of boron in waste water.

Il a été proposé dans le brevet des Etats-Unis d'Amérique no3 746 646 de substituer au peroxyde d'hydrogène ou aux persels, des hydroperoxydes organiques, ou plus exactement, à cause de la faible solubilité de ceux-ci certains de leurs dérivés solubles.It has been proposed in the patent of the United States of America No. 3,746,646 to substitute hydrogen peroxide or persalts, organic hydroperoxide, or more accurately, because of the low solubility of some of these their soluble derivatives.

La demande de brevet français publiée sous ne numéro 2 552 123 pro­pose de son côté l'usage d'aminoperoxydes dont la synthèse, décrite notam­ment dans l'article de E.G.E. HAWKINS, J. Chem. Soc., (1969), 191, pp.2678-­2681, reste délicate et coûteuse.The French patent application published under number 2,552,123 proposes the use of aminoperoxides, the synthesis of which, described in particular in the article by E.G.E. HAWKINS, J. Chem. Soc., (1969), 191, pp. 2678-2681, remains delicate and costly.

Le procédé selon l'invention, comme les compositions qui participent à sa réalisation et sont un autre objet de l'invention, conduisent à des effets de blanchiment supérieurs à ceux procurés par les composés peroxydés mis en oeuvre à ce jour, tout en évitant la pollution due au plus utilisé d'entre eux, le perborate de sodium, et l'usage d'activeurs complexes.The process according to the invention, like the compositions which take part in its realization and are another object of the invention, lead to whitening effects superior to those obtained by the peroxide compounds used to date, while avoiding the pollution due to the most used of them, sodium perborate, and the use of complex activators.

Le procédé conforme à l'invention pour le blanchiment de linge dans un bain au moyen d'un composé peroxydé est caractérisé en ce que le blanchi­ment est réalisé à un pH compris entre 10,5 et 12,5 en présence, comme composé peroxydé, de peroxyde de calcium CaO₂ introduit sous forme hydratée ou non de façon à ce que la quantité de calcium par litre de bain soit comprise entre 1.10⁻³ et 1.10⁻² atome-gramme.The process according to the invention for bleaching laundry in a bath using a peroxide compound is characterized in that bleaching is carried out at a pH of between 10.5 and 12.5 in the presence, as a peroxide compound, of calcium peroxide CaO₂ introduced in hydrated form or not so that the quantity of calcium per liter of bath is between 1.10⁻³ and 1.10⁻² atom-gram.

Les résultats les plus intéressants sur le plan économique ou sur le plan de la sureté du procédé sont obtenus à une température du bain pré­férentiellement comprise entre environ 30°C et 70°C, à un pH limité au plus à 11,5, ces deux paramètres étant pris isolément ou en combinaison.The most interesting results economically or in terms of process safety are obtained at a bath temperature preferably between about 30 ° C and 70 ° C, at a pH limited at most to 11.5, these two parameters being taken individually or in combination.

Au-dessous de 30°C, l'amélioration constatée de l'effet de blanchi­ment, bien que sensible encore à 20°C se réduit toutefois. Au-dessus de 70°C la dépense en énergie arrive à s'opposer à l'intérêt industriel du procédé.Below 30 ° C, the improvement observed in the bleaching effect, although still noticeable at 20 ° C, is however reduced. Above 70 ° C the energy expenditure comes to oppose the industrial interest of the process.

Au-delà d'un pH de 11,5 environ, le risque de dégradation de la fibre cellulosique peut devenir non négligeable.Above a pH of around 11.5, the risk of degradation of the cellulosic fiber can become significant.

Le bain peut encore contenir, comme c'est le plus souvent le cas en pratique, en nature et en quantité, tout ou partie des produits conuus pour être usuellement présents dans un bain à action détergente, autres que les agents de blanchiment peroxydés, tels que les surfactants et produits d'accompagnement : alkylbenzènesulfonates, alkylarylbenzènesulfonates, alcools gras éthoxylés, agents antiredéposition, azurants, parfums, agents séquestrants, phosphates alcalins, etc.... Des exemples de détergents con­nus sont par exemple donnés par Marshall Sittig dans DETERGENT MANUFACTURE, Noyes Data Corporation, 1976.The bath may also contain, as is most often the case in practice, in kind and in quantity, all or part of the products designed to be usually present in a bath with detergent action, other than peroxidized bleaching agents, such as as surfactants and accompanying products: alkylbenzenesulfonates, alkylarylbenzenesulfonates, ethoxylated fatty alcohols, anti-redeposition agents, brighteners, perfumes, sequestering agents, alkaline phosphates, etc. .... Examples of known detergents are for example given by Marshall Sittig in DETERGENT MANUFACTURE , Noyes Data Corporation, 1976.

Les séquestrants des ions alcalino-terreux dont la présence dans le bain est facultative mais cependant préférée, sont choisis par exemple par­mi les sels alcalins des acides polyphosphoriques comme le tripolyphospha­te de sodium désigné dans ce qui suit par TPP, Na, les sels alcalins des acides polyaminecarboxyliques ou des acides polyoxycarboxyliques comme ceux de l'acide éthylènediaminetétraacétique, le sel pentasodique de l'acide diéthylènetriaminepentaacétique, le sel trisodique de l'acide nitrilotri­acétique, ou encore le citrate de sodium.The sequestering agents of the alkaline-earth ions, the presence of which in the bath is optional but nevertheless preferred, are chosen for example from the alkaline salts of polyphosphoric acids such as sodium tripolyphosphate designated in the following by TPP, Na, the alkaline salts of acids polyaminecarboxylic or polyoxycarboxylic acids such as those of ethylenediaminetetraacetic acid, the pentasodium salt of diethylenetriaminepentaacetic acid, the trisodium salt of nitrilotriacetic acid, or even sodium citrate.

Le TPP, Na convient bien dans le cadre de l'invention.TPP, Na is well suited in the context of the invention.

L'effet de blanchiment est particulièrement amélioré par applica­tion du procédé de l'invention lorsque le complexant des ions alcalino­terreux est mis en jeu en quantité au moins égale à celle permettant la séquestration des ions calcium en solution dans le bain.The bleaching effect is particularly improved by applying the method of the invention when the complexing agent of alkaline earth ions is brought into play in an amount at least equal to that allowing the sequestration of calcium ions in solution in the bath.

Une composition conforme à l'invention contenant un composé peroxy­dé pour le blanchiment de linge est caractérisé en ce qu'elle renferme, comme composé peroxydé, du peroxyde de calcium CaO₂ sous forme hydratée ou non en quantité telle qu'elle permette la formation d'un bain qui, à pH compris entre 10,5 et 12,5 contient par litre de 1.10⁻³ à 1.10⁻² atome-gramme de calcium en vue de réaliser le procédé décrit plus haut.A composition in accordance with the invention containing a peroxidized compound for laundry bleaching is characterized in that it contains, as peroxidized compound, calcium peroxide CaO₂ in hydrated form or not in an amount such that it allows the formation of a bath which, at pH between 10.5 and 12.5 contains per liter of 1.10⁻³ to 1.10⁻² gram atom of calcium in order to carry out the process described above.

Une telle composition peut encore comprendre en nature et en quan­tité tout ou partie des produits connus pour être usuellement présents dans un bain à action détergente, autres que les composés de blanchiment peroxydés jusqu'alors utilisés, tels que ceux mentionnés plus haut.Such a composition may also comprise in nature and in quantity all or part of the products known to be usually present in a bath with detergent action, other than the peroxide bleaching compounds hitherto used, such as those mentioned above.

Elle peut ainsi comprendre des séquestrants des ions alcalino­terreux, de préférence en quantité au moins égale à celle correspondant à la séquestration des ions calcium en solution dans le bain formé à partir d'elle. Le tripolyphosphate de sodium convient bien en particulier dans une composition selon l'invention comme séquestrant des ions calcium.It can thus comprise sequestering agents of alkaline earth ions, preferably in an amount at least equal to that corresponding to the sequestration of calcium ions in solution in the bath formed from it. Sodium tripolyphosphate is particularly suitable in a composition according to the invention as sequestering calcium ions.

Une composition de l'invention permet la formation du bain de blan­chiment par addition simultanée de ses constituants.A composition of the invention allows the formation of the bleaching bath by simultaneous addition of its constituents.

La formation du bain peut être réalisée de toute manière en mettant en contact ses constituants dans un ordre quelconque. Par exemple, le pero­xyde de calcium sous forme hydratée ou non peut être ajouté aux autres constituants, dont le séquestrant le cas échéant, solubilisés dans l'eau préalablement à cette addition.The formation of the bath can be carried out anyway by bringing its constituents into contact in any order. For example, calcium peroxide in hydrated or non-hydrated form can be added to the other constituents, including the sequestering agent where appropriate, dissolved in water before this addition.

Le peroxyde de calcium utilisé sous forme hydratée ou non dans la réalisation du procédé ou la composition de l'invention, peut être prépa­ré de toute manière connue. Des exemples de préparation sont indiqués par exemple dans le NOUVEAU TRAITE DE CHIMIE MINERALE, P. Pascal, tome IV, 1958, pp. 399-400 ou dans PEROXIDES, SUPEROXIDES, and OZONIDES of ALKALI and ALKALINE EARTH METALS, Il'ya Ivanovich Vol'nov, Plenum Press, New-York 1966, pp. 58-60.The calcium peroxide used in hydrated form or not in carrying out the process or the composition of the invention can be prepared in any known manner. Examples of preparation are indicated for example in the NEW TREATY OF MINERAL CHEMISTRY, P. Pascal, volume IV, 1958, pp. 399-400 or in PEROXIDES, SUPEROXIDES, and OZONIDES of ALKALI and ALKALINE EARTH METALS, Il'ya Ivanovich Vol'nov, Plenum Press, New-York 1966, pp. 58-60.

Il est particulièrement intéressant d'utiliser une forme de peroxyde de calcium de solubilité la meilleure dans les conditions d'exécution du procédé de l'invention.It is particularly advantageous to use a form of calcium peroxide with the best solubility under the conditions for carrying out the process of the invention.

L'opération de blanchiment selon l'invention est suivie des opérations de rinçage et d'essorage avant séchage telles qu'elles sont classiquement pratiquées.The bleaching operation according to the invention is followed by the rinsing and wringing operations before drying as they are conventionally practiced.

Les exemples ci-dessous, donnés à titre indicatif mais non limi­tatif, permettent d'apprécier l'avantage de l'invention.The examples below, given as an indication but not limiting, make it possible to appreciate the advantage of the invention.

Dans ces exemples :
- sous le terme de lessive est désignée la lessive normalisée en poudre EMPA® renfermant, en poids, 14 % de surfactants, 30,4 % de tripoly­phosphate de sodium, le complément à 100 % étant assuré par du pyro­phosphate de sodium, de l'orthophosphate de sodium et d'autres sels de sodium, ainsi que par des azurants, composés divers et 18,9 % d'eau,
- le procédé de l'invention est réalisé en cuve cylindrique en verre agitée, munie d'un moyen de chauffage et renfermant le bain et un tissu normalisé EMPA® taché de vin dans un rapport pondéral bain/tissu égal à 100. Un rapport aussi élevé n'a été choisi que par raison de commodité. C'est un paramètre qui n'a pas d'incidence pratique sur le résultat du procédé,
- l'opération de détergence-blanchiment comporte un palier en température de 15 minutes. Seule la valeur de cette température sera indiquée ci-­après. La vitesse de montée en température du bain jusqu'à la tempéra­ture de palier à partir de la température ambiante de 20°C environ est de 10°C par minute. En fin d'opération le tissu traité est classiquement séparé du bain, égoutté et rincé à l'eau à température ambiante avant séchage,
- le pH du bain est chaque fois compris entre 10,5 et 12,5,
- le degré de blanc du tissu est mesuré à l'aide d'un spectrophotomètre ERICHSEN GLOSSMASTER no 507 étallonné à un degré de blanc égal à 90 pour l'oxyde de magnésium fourni comme référence avec l'appareil,
- le tissu à traiter a un degré de blanc mesuré égal à 41,
- le peroxyde de calcium a été engagé sous forme d'octahydrate.In these examples:
- under the term of detergent is designated the standard detergent in powder EMPA® containing, by weight, 14% of surfactants, 30.4% of sodium tripolyphosphate, the complement to 100% being ensured by sodium pyrophosphate, sodium orthophosphate and other sodium salts, as well as by brighteners, various compounds and 18.9% water,
- The process of the invention is carried out in a cylindrical stirred glass tank, provided with a heating means and containing the bath and an EMPA® standardized fabric stained with wine in a bath / fabric weight ratio equal to 100. A ratio also high was chosen for convenience only. This is a parameter which has no practical impact on the result of the process,
- the detergency-bleaching operation includes a temperature plateau of 15 minutes. Only the value of this temperature will be indicated below. The rate of temperature rise from the bath to the plateau temperature from the ambient temperature of approximately 20 ° C. is 10 ° C. per minute. At the end of the operation, the treated fabric is conventionally separated from the bath, drained and rinsed with water at room temperature before drying,
- the pH of the bath is each between 10.5 and 12.5,
- the degree of whiteness of the fabric is measured using a spectrophotometer Erichsen GLOSSMASTER No. 507 étallonné a whiteness equal to 90 for the provided magnesium oxide as a reference with the device,
- the fabric to be treated has a measured degree of white equal to 41,
- calcium peroxide has been used in the form of an octahydrate.

Les caractéristiques des exemples et les résultats obtenus pour chacun d'eux sont rassemblés dans le tableau I ci-dessous.

Figure imgb0001
The characteristics of the examples and the results obtained for each of them are collated in Table I below.
Figure imgb0001

Les exemples 3, 6, 7 et 11 sont donnés à titre comparatif.Examples 3, 6, 7 and 11 are given for comparison.

De la comparaison entre eux des exemples 2 et 3, 5 et 6, 8 et 7, 10 et 11 respectivement, il ressort que l'invention permet d'accroître le degré de blanc de plus de 15 % en moyenne.From the comparison between them of Examples 2 and 3, 5 and 6, 8 and 7, 10 and 11 respectively, it appears that the invention makes it possible to increase the degree of whiteness by more than 15% on average.

De la comparaison des exemples 9 et 7 il ressort qu'en engageant selon l'invention une quantité d'agent peroxydé exprimée en oxygène actif 4 fois plus faible que dans un procédé connu, il est possible d'atteindre un degré de blanc au moins aussi élevé que celui procuré par ce dernier.From the comparison of Examples 9 and 7, it appears that by using, according to the invention, a quantity of peroxidized agent expressed in active oxygen 4 times lower than in a known process, it is possible to achieve a degree of white at least as high as that provided by the latter.

De la comparaison des exemples 1 et 11 il est permis de constater qu'un même degré de blanc peut être attendu d'un procédé n'incorporant pas l'invention ou l'incorporant mais dans ce dernier cas à une tempé­rature inférieure de 20°C à 30°C.From the comparison of Examples 1 and 11, it can be seen that the same degree of white can be expected from a process which does not incorporate the invention or incorporate it but in the latter case at a temperature below 20 °. C at 30 ° C.

Claims (14)

1. Procédé de blanchiment de linge dans un bain au moyen d'un compo­sé peroxydé, caractérisé en ce que le blanchiment est réalisé à un pH com­pris entre 10,5 et 12,5 en présence, comme composé peroxydé, de peroxyde de calcium sous forme hydratée ou non introduit de façon à ce que la quan­tité de calcium par litre de bain soit comprise entre 1.10⁻³ et 1.10⁻² atome-gramme.1. A method of bleaching laundry in a bath using a peroxide compound, characterized in that bleaching is carried out at a pH of between 10.5 and 12.5 in the presence, as peroxide compound, of calcium peroxide under hydrated form or not introduced so that the amount of calcium per liter of bath is between 1.10⁻³ and 1.10⁻² atom-gram. 2. Procédé selon la revendication 1 caractérisé en ce que le pH du bain est au plus égal à 11,5.2. Method according to claim 1 characterized in that the pH of the bath is at most equal to 11.5. 3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que la température du bain est comprise entre 30 et 70°C.3. Method according to one of claims 1 or 2, characterized in that the bath temperature is between 30 and 70 ° C. 4. Procédé selon l'une des renvendications 1 à 3, caractérisé en ce que le bain renferme un séquestrant des ions alcalino-terreux.4. Method according to one of claims 1 to 3, characterized in that the bath contains a sequestering agent of alkaline earth ions. 5. Procédé selon la revendication 4, caractérisé en ce que le sé­questrant des ions alcalino-terreux est en quantité au moins égale à celle permettant la séquestration des ions calcium en solution dans le bain.5. Method according to claim 4, characterized in that the sequestering agent of alkaline earth ions is in an amount at least equal to that allowing the sequestration of calcium ions in solution in the bath. 6. Procédé selon l'une des renvendications 4 ou 5, caractérisé en ce que le séquestrant des ions alcalino-terreux est le tripolyphosphate de sodium.6. Method according to one of claims 4 or 5, characterized in that the sequestering agent of alkaline earth ions is sodium tripolyphosphate. 7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que le calcium est mis en oeuvre sous forme d'un composé répondant à la for­mule CaO₂, 8H₂O.7. Method according to one of claims 1 to 6, characterized in that the calcium is used in the form of a compound corresponding to the formula CaO₂, 8H₂O. 8. Procédé selon l'une des renvendications 1 à 7, caractérisé en ce que le bain contient un détergent.8. Method according to one of claims 1 to 7, characterized in that the bath contains a detergent. 9. Composition à action détergente contenant un composé peroxydé pour le blanchiment de linge domestique, caractérisé en ce qu'elle renfer­me comme composé peroxydé, du peroxyde de calcium sous forme hydratée ou non en quantité telle qu'elle permette la formation d'un bain qui à pH compris entre 10,5 et 12,5 contient de 1.10⁻³ à 1.10⁻² atome-gramme de calcium par litre.9. Composition with detergent action containing a peroxide compound for bleaching household linen, characterized in that it contains as peroxide compound, calcium peroxide in hydrated form or not in an amount such that it allows the formation of a bath which at pH between 10.5 and 12.5 contains from 1.10⁻³ to 1.10⁻² gram atom of calcium per liter. 10. Composition selon la revendication 9, caractérisée en ce que le calcium est mis en oeuvre sous forme d'un composé répondant à la formule CaO₂, 8H₂O.10. Composition according to claim 9, characterized in that the calcium is used in the form of a compound corresponding to the formula CaO₂, 8H₂O. 11. Composition selon l'une des revendications 9 et 10, caractérisée en ce qu'elle renferme un séquestrant des ions alcalino-terreux.11. Composition according to one of claims 9 and 10, characterized in that it contains a sequestering agent of alkaline earth ions. 12. Composition selon la revendication 11, caractérisée en ce que le séquestrant des ions alcalino-terreux est en quantité au moins égale à celle permettant la séquestration des ions calcium en solution dans le bain formé à partir de ladite composition.12. Composition according to claim 11, characterized in that the sequestering agent of alkaline-earth ions is in an amount at least equal to that allowing the sequestration of calcium ions in solution in the bath formed from said composition. 13. Composition selon l'une des revendication 11 et 12, caractérisée en ce que le séquestrant est le tripolyphosphate de sodium.13. Composition according to one of claims 11 and 12, characterized in that the sequestrant is sodium tripolyphosphate. 14. Composition selon l'une des revendications 9 à 13, caractérisée en ce qu'elle contient un détergent.14. Composition according to one of claims 9 to 13, characterized in that it contains a detergent.
EP87420124A 1986-05-15 1987-05-12 Process and composition for bleaching laundry Expired EP0246985B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8607151A FR2598728B1 (en) 1986-05-15 1986-05-15 METHOD AND COMPOSITION FOR THE BLEACHING OF DOMESTIC LAUNDRY
FR8607151 1986-05-15

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EP0246985A2 true EP0246985A2 (en) 1987-11-25
EP0246985A3 EP0246985A3 (en) 1988-02-24
EP0246985B1 EP0246985B1 (en) 1989-10-25

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EP (1) EP0246985B1 (en)
JP (1) JPS62299563A (en)
CN (1) CN1005637B (en)
AU (1) AU603100B2 (en)
CA (1) CA1312179C (en)
DE (2) DE3760878D1 (en)
ES (1) ES2000631B3 (en)
FR (1) FR2598728B1 (en)
GR (2) GR880300020T1 (en)
PT (1) PT84867B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891147A (en) * 1988-11-25 1990-01-02 The Clorox Company Stable liquid detergent containing insoluble oxidant
US5019289A (en) * 1988-11-25 1991-05-28 The Clorox Company Stable liquid detergent containing insoluble oxidant
DE4035813A1 (en) * 1990-11-10 1992-05-14 Akzo Gmbh OXYGEN BLEACHING

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230171A (en) * 1963-03-04 1966-01-18 Dow Chemical Co Bleaching composition

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5122984B2 (en) * 1972-07-29 1976-07-14
US4120650A (en) * 1977-12-05 1978-10-17 Basf Wyandotte Corporation Laundering process for dual bleaching stained fabrics

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230171A (en) * 1963-03-04 1966-01-18 Dow Chemical Co Bleaching composition

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4891147A (en) * 1988-11-25 1990-01-02 The Clorox Company Stable liquid detergent containing insoluble oxidant
US5019289A (en) * 1988-11-25 1991-05-28 The Clorox Company Stable liquid detergent containing insoluble oxidant
DE4035813A1 (en) * 1990-11-10 1992-05-14 Akzo Gmbh OXYGEN BLEACHING

Also Published As

Publication number Publication date
FR2598728A1 (en) 1987-11-20
FR2598728B1 (en) 1991-04-19
CA1312179C (en) 1993-01-05
JPS62299563A (en) 1987-12-26
CN87103609A (en) 1987-11-25
JPH0219226B2 (en) 1990-05-01
ES2000631B3 (en) 1990-02-16
AU603100B2 (en) 1990-11-08
CN1005637B (en) 1989-11-01
EP0246985A3 (en) 1988-02-24
GR880300020T1 (en) 1988-10-18
AU7292587A (en) 1987-11-19
DE246985T1 (en) 1988-04-28
ES2000631A4 (en) 1988-03-16
PT84867A (en) 1987-06-01
EP0246985B1 (en) 1989-10-25
GR3000201T3 (en) 1990-12-31
PT84867B (en) 1990-02-08
US4784787A (en) 1988-11-15
DE3760878D1 (en) 1989-11-30

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