SU954417A1 - Process for preparing self-emulsifying oil - Google Patents

Description

The invention relates to the preparation of emulsol used to prepare lubricating coolant (coolant) emulsions used in the machining of metals. A known method for producing emulsol involves removing solids from an emulsion, adding base and emulsol to maintain the pH of the medium and the concentration of the emulsion in Required limits 1 However, the coolant lubricant undergoes irreversible changes and is considered spent. The final stage of multiple regeneration of the coolant is the destruction of the mixture of spent coolant using a demulsifier and the formation of the organic and aqueous phases. The aqueous phase is partially used for the preparation of new coolant, and the organic, obtained in the usual way of destruction, for example, iron-containing, does not have emulsifying properties and goes to landfill (n landfill, incineration, etc.). The closest to the essentially proposed and achieved result is a method for producing an emulsol by decomposing a mixture of used coolants with an effective desmulgator of copper sulphate, forming a mixture of copper-containing organic and aqueous phases and introducing it into a standard emulsion salt. Copper-containing organic phase, c. unlike iron containing, obtained by a conventional destruction method, it has emulsifying properties. 2 However, its solubilizing properties are insufficient for reuse as an additive to the pulp, since it contains a small amount of organic copper compounds. Therefore, an emulsol prepared from standard emulsol and raw coolant decomposition products is unstable. After preparation, it decomposes within 15-20 minutes. It is not at all possible to prepare an emulsion because of the separation of the organic phase from the aqueous phase. Thus, the use of the organic phase of the products of destruction of spent coolant using copper sulfate as a demulsifier for the preparation of emulsol is not known. Therefore, it was subject to disposal (was taken to the dump), which significantly polluted wastewater. The aim of the invention is to reduce wastewater pollution. The goal is achieved by the fact that upon receipt of an emulsol by decomposing the mixture of spent coolant with copper sulphate to form a mixture of copper-containing organic and aqueous phase, the mixture of copper-containing organic and aqueous phases is treated with an aqueous solution of soda ash, taken in an amount of 0.300, 40% by volume, followed by introducing, with stirring, an aqueous solution of polyacrylamide in an amount of 0.010.02% by volume and settling the resulting mixture to separate the organic phase, which is mixed with petroleum oil and introducing the resulting mixture and in the standard emulsol in the amount of 20-30%. The process is desirable to conduct when using a 9-10% aqueous solution of soda and O, 10-0.20% aqueous solution of polyacrylamide. When treating the organic and water phases with soda ash and polyacrylamide, inorganic copper compounds precipitate as copper hydroxide. This small amount of inorganic compounds is treated with sulfuric acid and reused as a demulsifier to decompose used coolant. Purified copper-containing organic decomposition products of coolant have good solubilizing properties, form resistant micelles such as oil-soap. An emulsion prepared from emulsol with copper-containing organic products is stable and does not stratify. So the oil separation in it did not exceed 0.65% for 3 hours. The preparation of emulsol is carried out in the following way. After repeated regeneration, the spent, irreversible changes in the coolant are sent from the machine tools to the decomposition station into a common container, where it is destroyed for 10 minutes at room temperature and intensively mixed with copper sulfite added in an amount of 310.5 wt.% To the mixture Coolant The mass thus obtained is treated with 9.5 ± 0.5% solution of soda ash soda in an amount of 0.3510.05 wt.% Until the pH of the medium is 7, 5iO, 5. This composition contains 0.15 tO, 05% a solution of polyacrylates and in the amount of 0.15 ± 0.05 wt.%. The whole is agitated during the treatment, then it is settled for 2.5iO, 5 hours. The aqueous phase is sent to a collector for use in preparing the emulsion. A copper-containing organic phase of 40ilO wt.% Is added to the regenerated oil. After thorough mixing of both components, a pasty product is obtained, which is an additive to the standard emulsol. In the process of sequential input of components, everything is mixed for 1 min. This composition emulsol used in the preparation of the emulsion in the usual way. According to the proposed method, the mixture of copper-containing organic and aqueous phases after destruction of the spent emulsion ET-2 with copper sulphate is subjected to special treatment with 9.5% soda ash in the amount of 0.35%, then with 0.15% polyacryl solution | yes in the amount 0.15% with continuous stirring. The mixture is settled for 2.5 hours. The aqueous phase with copper ions with bactericidal properties is directed through a specially manufactured pipeline again to prepare the emulsion. Organic decomposition products are drained into a special container on average up to a day. Waste industrial oils, purified from water and mechanical impurities, are discharged into the same tank in the amount of 60% with respect to the organic phase. The mass is thoroughly mixed and used as an additive to fresh emulsol ET-2 in the amount of 25%. Studies show that the proposed method meets the requirements of industrial sanitation. The resulting emulsion meets the requirements of GOST in all respects. Comparative generalized results of numerous measurements of physicochemical parameters of a 3-5% emulsion prepared only from standard emulsol ET-2 and an emulsion from emulsol prepared by the proposed method are shown in the table. By using the copper-containing organic phase to re-prepare the emulsol, environmental pollution is prevented. The aqueous phase with residual oil content after decomposition of the spent emulsions is not drained to the sewage system, and is also used again for the preparation of the emulsion. Another advantage of the proposed method is the improvement of the bactericidal properties of the coolant due to the presence of copper ions in the emulsion. This makes it possible to lengthen the operating time of the emulsion up to the moment of destruction by 10-15% as compared with emulsions prepared from standard

EMULSOLOV.

Increasing the duration of the emulsion cycle to the final stage of regeneration - decomposition and reuse of decomposition products of used emulsions for the preparation of emulsol allows to reduce the consumption of standard emulsol and water by 25%.

In addition, the presence of copper ions in the emulsion makes it possible to increase the resistance of the cutting tools by an average of 10% compared to the emulsion used in a fine way.

According to the proposed method, high quality emulsoles were prepared using standard emulsions that were widely used in mechanical processing: 3-2 GOST 1975-58, EGT TK 38-101-149.71, and others.

Requirements

Indicator TU-38-3011-76

Stability (separation of oil for 3 hours),%

Corrosive effect. 3% emulsion

a-not more than 0.3

Acid number in mg KOH per 1 g of emulsol

Total content of high molecular weight organic acids,%

Claims (2)

1. A method of producing emulsol by decomposing a mixture of used coolant fluids with copper sulphate to form a mixture of copper-containing, organic and aqueous phases, characterized in that, in order to reduce the pollution of waste water, the mixture of copper-containing organic and aqueous phases is treated with an aqueous solution of emulsions from emulsol prepared by the proposed method 0.5-0.7 0.5-0.65 Absence Absence 8.5-9.5 8.5-9.5 8-10 0.18-0.2, 0.16-0.18 5.3-5.8 5.2-5.6 7.4-8.2 8.0-8.3 soda ash, taken in an amount of 0.30-0.40 vol.%, followed by the introduction with stirring of an aqueous solution of polyacrylamide in an amount of 0.01-0.02 vol.% and slug the mixture obtained with the separation of the organic phase, which is mixed with petroleum oil, and introducing the resulting mixture into a standard emulsol in an amount of 20-30 vol.%. 2, Method POP.1, different and with what is used 7954417 8 9.0-10.0% soda solution and 0.10-1. Patent of Great Britain No. 1380012, 0.20% polyacrylamide solution. cl. From 10 M 11/00, published. 1974 Sources of information, no. 423482, В 01 D 17/04 1973 (they are taken into account during examination of the type). 2. USSR author's certificate