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EP0034548A1 - Vorrichtung zum Erzeugen von Dispersionen - Google Patents

Vorrichtung zum Erzeugen von Dispersionen Download PDF

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Publication number
EP0034548A1
EP0034548A1 EP81420010A EP81420010A EP0034548A1 EP 0034548 A1 EP0034548 A1 EP 0034548A1 EP 81420010 A EP81420010 A EP 81420010A EP 81420010 A EP81420010 A EP 81420010A EP 0034548 A1 EP0034548 A1 EP 0034548A1
Authority
EP
European Patent Office
Prior art keywords
powder
turbine
liquid
dispersions
brought
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
EP81420010A
Other languages
English (en)
French (fr)
Other versions
EP0034548B1 (de
Inventor
André Berchoux
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.)
Rhone Poulenc Textile SA
Original Assignee
Rhone Poulenc Textile SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rhone Poulenc Textile SA filed Critical Rhone Poulenc Textile SA
Publication of EP0034548A1 publication Critical patent/EP0034548A1/de
Application granted granted Critical
Publication of EP0034548B1 publication Critical patent/EP0034548B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/60—Pump mixers, i.e. mixing within a pump
    • B01F25/64—Pump mixers, i.e. mixing within a pump of the centrifugal-pump type, i.e. turbo-mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/50—Mixing liquids with solids
    • B01F23/53—Mixing liquids with solids using driven stirrers

Definitions

  • the present invention relates to a method and a device for the continuous production of fine dispersions.
  • It relates in particular to a method and a device for obtaining dispersions of a divided product in the form of powder in a liquid.
  • the powder is brought to the mixing device by gravity.
  • the powder is brought to the center of the mixing device while the liquid is brought to the outside of the same device.
  • the contact time inside the device is as short as possible, of the order of the millisecond; this time must be all the lower, the higher the solvating power of the liquid vis-à-vis the powder.
  • the solvent and the powder are brought to respective temperatures such that the solvating power is as low as possible during the operation, to avoid the risks of clogging.
  • the present invention also relates to a device for obtaining fine dispersions comprising a turbine composed of at least two non-continuous parts which do not allow the products to return to the center of said turbine: a powder supply pipe and a liquid supply pipe in separate points, a dispersion evacuation pipe. Preferably, the latter is placed tangentially with respect to the turbine.
  • the two non-continuous parts consist of at least two rows of blades and the powder supply pipe opens into the central part of the turbine while the liquid supply pipe opens at the level of the outer part of it.
  • the plane of the turbine is inclined to promote the flow of dispersions.
  • the conduit bringing the powder is inclined so that it arrives by gravity.
  • the process according to the invention has as an essential characteristic the fact that the powder and the liquid are brought into contact dynamically and at high speed. To do this, they must be brought to separate points and set to speed separately before being brought into contact.
  • Such a method is suitable even in the case of a liquid having a high solvating power with respect to the powder, intended to be dispersed in said liquid.
  • dispersions of polyvinyl chloride in a solvent such as the carbon sulfide / acetone mixture.
  • the dispersions thus obtained are fine and regular so that the resulting solutions can then be spun continuously without problem to give yarns and fibers also of regular composition. Furthermore, the actual dissolution can be carried out more quickly and more easily so that the energy required to obtain the collodions is much less.
  • the concentration limit is determined by the viscosity of the products obtained beyond which they are no longer transportable.
  • the polyvinyl chloride powder is conveyed by gravity in the duct 1 arriving at the center of the turbine 2 then immediately set in speed by centrifugal force by means of the blades 3.
  • the solvent is conveyed separately by means of a conduit 6 placed perpendicularly to the plane of the turbine and arrives on the series of outer blades then is put into motion immediately, the powder and the solvent coming into speed contact on the outer part of the turbine 2. This is inserted in a room 4 and actuated by means of the motor 5.
  • the turbine is inclined at 45 * relative to the horizontal.
  • the dispersion leaves tangentially to the turbine 2 by means of the conduit 7 and the dispersion is collected by gravity.
  • FIG. 2 represents a slightly different embodiment of the method according to the invention. It includes a conduit (1) provided with an endless via, placed horizontally bringing the polymer powder to the center of the turbine (2) provided with blades (3) allowing the polymer powder to speed up in the external part the turbine; the conduit 6 allows the direct introduction of the solvent onto the outer blades of the turbine, the two products being dispersed instantaneously by the turbine 2 actuated by the motor 5. The dispersion obtained leaves by gravity by means of the conduit 7 tangentially to the turbine.
  • the method and the device according to the present application make it possible to obtain, in a very short period of time, which may be as low as a few milliseconds, fine and regular dispersions of variable concentration depending on the viscosity of said dispersions and their ability to be vehicles.
  • fine and regular dispersions of variable concentration depending on the viscosity of said dispersions and their ability to be vehicles.
  • dispersions of polyvinyl chloride powder in the solvent mixture of carbon sulfide / acetone (50/50 by volume) with a concentration of 28 to 30% by weight it even turns out to be possible to obtain dispersions by introducing the solvent-mixture at room temperature, which is of great economic interest.
  • the device as shown in FIG. 2 is used, which has been continuously rotated for 100 hours, while introducing polyvinyl chloride powder with a flow rate of 45 kg / hour into the center of the turbine, by l 'Intermediate of a dosing screw and the solvent mixture carbon sulfide / acetone (50/50 by volume) maintained at about 2 ° C at a rate of 115 l / hour on the outside of the turbine.
  • the device with an internal diameter of 12 cm has an outer row of 12 blades inclined at 30 °; the central blades are simply constituted by a butterfly screw.
  • the speed of rotation of the turbine is 3,000 rpm and the dispersion is produced in about 5 milliseconds at a rate of 160 kg / hour.
  • the dispersion thus obtained is taken up in a tank and can be used continuously in later stages of treatment.
  • polyvinyl chloride powder is introduced separately at a rate of 60 kg / hour and the solvent mixture of carbon sulfide / acetone at a rate of 160 kg / hour at room temperature.
  • the dispersion was produced continuously with a flow rate of 220 kg / hour for 5 hours directly at room temperature.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP81420010A 1980-02-13 1981-02-11 Vorrichtung zum Erzeugen von Dispersionen Expired - Lifetime EP0034548B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8003217 1980-02-13
FR8003217A FR2475418A1 (fr) 1980-02-13 1980-02-13 Procede et dispositif pour l'obtention de dispersions

Publications (2)

Publication Number Publication Date
EP0034548A1 true EP0034548A1 (de) 1981-08-26
EP0034548B1 EP0034548B1 (de) 1990-01-03

Family

ID=9238559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81420010A Expired - Lifetime EP0034548B1 (de) 1980-02-13 1981-02-11 Vorrichtung zum Erzeugen von Dispersionen

Country Status (9)

Country Link
US (1) US4529321A (de)
EP (1) EP0034548B1 (de)
JP (1) JPS56152840A (de)
BR (1) BR8100929A (de)
CA (1) CA1160937A (de)
DE (1) DE3177138D1 (de)
ES (1) ES8201438A1 (de)
FR (1) FR2475418A1 (de)
SU (1) SU1276250A3 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893941A (en) * 1987-07-06 1990-01-16 Wayte Joseph M Apparatus for mixing viscous liquid in a container
US4999015A (en) * 1988-05-27 1991-03-12 Demaris Elbert E High speed rotational dispersion device using short shear path
DE50011334D1 (de) * 2000-05-19 2006-02-23 Vakumix Ruehr Und Homogenisier Homogenisator zur Herstellung fliessfähiger Stoffe
JP4005479B2 (ja) * 2002-11-11 2007-11-07 Ｔｈｋ株式会社 ホモジナイザー
US7048432B2 (en) * 2003-06-19 2006-05-23 Halliburton Energy Services, Inc. Method and apparatus for hydrating a gel for use in a subterranean formation
FR2872682B1 (fr) * 2004-07-08 2006-10-20 Vmi Sa Dispositif de melange en continu d'une pate alimentaire comprenant un outil de melange centrifuge et une evacuation laterale
US10213753B2 (en) * 2017-03-16 2019-02-26 UGSI Chemical Feed, Inc. High-capacity polymer system and method of preparing polymeric mixtures

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1234254A (de) * 1967-06-27 1971-06-03

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559516A (en) * 1949-04-01 1951-07-03 Standard Oil Dev Co Method and apparatus for combining fluids
US2658049A (en) * 1950-11-10 1953-11-03 Us Rubber Co Preparation of synthetic rubbercarbon black mixtures
CH406150A (de) * 1963-06-27 1966-01-31 Buehler Ag Geb Mischer
US3320639A (en) * 1965-10-01 1967-05-23 Union Carbide Corp Apparatus for blending powders
US3423075A (en) * 1967-01-31 1969-01-21 Nat Lead Co Mixing device
US3682447A (en) * 1970-10-12 1972-08-08 Supraton Bruchmann & Zucker Kg Apparatus for producing dispersions or solutions from a liquid component and a solid or pasty component
US3923289A (en) * 1971-12-13 1975-12-02 Victor Danberg Method of mixing solids and liquids on a continuous basis
US4106117A (en) * 1976-05-07 1978-08-08 Waukesha Foundry Company, Inc. Apparatus for mixing particulate material in a liquid
JPS536984A (en) * 1976-07-08 1978-01-21 Shiyoji Ishizaki Puncher for sheet member
JPS5335298A (en) * 1976-09-14 1978-04-01 Nippon Dry Chemical Kk Powder fire extinguishing agent for naturally flammable liquid
JPS5338828A (en) * 1976-09-21 1978-04-10 Tk Carburettor Floatless carburetor
SU709148A1 (ru) * 1976-09-28 1980-01-15 Всесоюзный Научно-Исследовательский Институт Комбикормовой Промышленности Центробежный смеситель непрерывного действи
JPS53148067A (en) * 1977-05-28 1978-12-23 Kobe Steel Ltd Pin mixer
JPS544455A (en) * 1977-06-10 1979-01-13 Maruei Concrete Kogyo Corner protector for gutter frame block
JPS5481559A (en) * 1977-12-09 1979-06-29 Asahi Chem Ind Co Ltd Method of continuous mixing of liquid and powder
JPS559248U (de) * 1978-07-03 1980-01-21
US4176972A (en) * 1978-08-09 1979-12-04 National Gypsum Company Coaxial pump mixer
US4239396A (en) * 1979-01-25 1980-12-16 Condor Engineering & Manufacturing, Inc. Method and apparatus for blending liquids and solids
DE7935838U1 (de) * 1979-12-20 1982-08-26 Warschke, Werner, 6239 Kriftel Misch- und dispergiervorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1234254A (de) * 1967-06-27 1971-06-03

Also Published As

Publication number Publication date
US4529321A (en) 1985-07-16
CA1160937A (fr) 1984-01-24
ES499364A0 (es) 1981-12-16
FR2475418B1 (de) 1984-12-21
EP0034548B1 (de) 1990-01-03
FR2475418A1 (fr) 1981-08-14
BR8100929A (pt) 1981-08-25
DE3177138D1 (de) 1990-02-08
JPH059456B2 (de) 1993-02-05
JPS56152840A (en) 1981-11-26
ES8201438A1 (es) 1981-12-16
SU1276250A3 (ru) 1986-12-07

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