SU745929A1 - Method of purifying sulfate soap from nonsaponified substances - Google Patents

Description

The invention is designed for enterprises of the pulp-and-paper industry and of: to methods of cleaning sulphate soap, especially hardwood, from uncleanable substances. The prototype of the proposed technical solution is the method of purifying sulphate soap from unwashed substances by dissolving soap in water and HeowjbumeMbix substances from a pulverized solution with an extract of lower alcohol and carboxylic acid as an extractant with the latter followed by distilling the last til. The main drawbacks of this method are tracking; Strong foaming arises when preparing aqueous solutions of soap and the formation of heterogeneous mixture of water and soap, which reduces the intensity of extraction, since it makes feeding the extraction mixture with a constant composition difficult and requires FOR: achieving a sufficient degree of extraction of unstable extracts extraction steps and solvent. The purpose of the present invention is to intensify the extraction process and to avoid foaming when dissolving soap. To this end, water is mixed with an extractant in a ratio of 1: 14-2 before dissolving. The amount of this mixture in relation to the amount of soap is chosen such that as a result of the mixing a homogeneous solution is obtained, which is close in composition to a saturated one. As a result of the research, it was found that TfI solution & ni sulfate soap in a mixed plant. Not only does the foaming of this composition not foaming, as when dissolved in water, but the structure of the original sulphate soap is destroyed by the foam. The proposed method allows, noMfUmo exceptions noted above lack.

to intensify the extraction process due to better phase dispersion, improved diffusion conditions of neutral substances due to the absence of a solid phase and the elimination of coalescence j in the soap solution phase. In addition, the volume of water and the cost of its evaporation are reduced, and consequently, energy and capital costs are consumed.

The method is carried out as follows.

The sulphate soap in the mixer is mixed with water and ether solvent in the indicated ratios. The resulting Jore solution continuously flows into the upper part of the ExTiaKTOpa, IB the lower part of which receives the ether solvent. The extraction process is carried out at a temperature of 20-75 0, preferably 20-30 C. The extract is continuously selected from the upper settling zone of the extractor, which is a series of ST-borne-soluble substances in a solvent. The extract enters the evaporating herystem, where the solvent is distilled off. Its vapors are condensed in a condenser, the condensate re-enters the mixer and the extractor. Non-washable substances that constitute the end of sterolsin are recycled by any of the known methods for the preparation of -sitosterol. A raffinate is taken from the bottom of the extractor zone, which represents a rat gop oi: i: s from a non-containing substance s5 sulphate soap in water and an organic ether solvent. The solution enters the regeneration of the ether solvent in the evaporator. The vapors condense into condensate, condense and cool and return to the process. From the bottom of the evaporator, an aqueous clear solution is discharged. Purified soap, which lioctynaet for treatment with sulfuric acid, as a result of which tall oil is obtained, is released from nebosshshih substances. Vacuum distillation from tall oil get high-quality fatty acids (and rosin - when processing softwood sulphate soap). You-so product flow is 10–25% higher than in the separation of tall oil (zhygo oil, which is not purified from unwashed substances.

The method is especially effective in processing sulphate soap of hardwood wood.

PRIMER ER 1. Sulfate soap (containing 35% water and 10% unwashed hangers), 10 kg / hour water and 6.7 kg / hour is supplied to the mixer. The resulting homogeneous solution enters the upper part of the SKCTW cation column in the amount of 26.7 kg / hour. The lower part of the extractor receives ethyl acetate (kg / hour). The extract is taken from the upper settling zone of the extractor in an amount of 27.73 kg / hour and contains 3.7 % solids, which for 93.2% consist of unwashed substances. After distilling off ethyl acetate (26.6 kg / h), a residue in the amount of 1.13 kg / h, containing 84.9% of unwashed substances, 6.19% of soap and 8.84% of ethyl acetate, is obtained. From the bottom sedimentation stand of an E1CC tractor, 25.67 kg / h of a solution of purified soap, containing 0.04% kg / h of unwashed substances, 6.7 kg / h of ethyl acetate are taken. The soap solution is fed to the regeneration of the solvent in the evaporator (25.67 kg / h). After distillation of ethyl acetate (6.57 kg / h), a solution of soap, purified from unwashed substances in an amount of 19.1 kg / h, containing 70.68% water, 0.68% ethyl acetate, 0.01% unwashed substances, is obtained; Soap 28.43%. Talp oil, obtained by decomposing soap of such a composition, contains 0.70% unwashed substances.

Example 2, 10 kg / h of cocTaBaj sulphate soap of the similar pr. No. enters the mixer, where it is mixed with 10 kg / h of water and 5.4 kg / h of butyl acetate. The solution enters the extractor in the amount of 25.4 kg / hour. At a ratio of 1: 1 to the feed mixture, butyl acetate is supplied to the lower part of the extractor. The extract is taken from the upper part of the E1; toner (26.43 kg / h) and contains 4% of dry matter, which in 94.2% consists of unwashed substances. After distillation of butyl acetate (26, 3 kg / h), a residue is obtained in an amount of 1.15 kg / h, containing 85.8% of unwashed substances, 5% of soap and 10% of butyl acetate. From the lower zone of the extractor, 14.37 kg / h of the solution is drained, which is sent to regenerate the solvent. After distilling off 5.25 kg / h of butyl acetate, the solution of purified soap is fed to the treatment with sulfuric acid. Tall oil contains 0.60% unwashed material.

Claims (2)

Using the proposed method, based on known substances from sulphate soap, as compared with the known ones, it is possible to create KWrn plants for processing sulphate-nano soap, especially with high removal of hardwood substances from hardwood because the formation of emulsions in the process of separation and subsequent obtaining of resin and fatty acids with a minimum content of non-pouring substances. Economic efficiency is achieved by increasing the output and improving the quality of fatty and resin acids when rectifying the mixture of these acids, obtained by decomposing the sulphate soap purified by the proposed method. The Inventive Formula A method for purifying sulphate soap from unwashed substances by dissolving soap in water and extracting unwashed whispers from the resulting solution with folded ester of lower alcohol and carboxylic acid as an ejectant with rstcnepy distillation of the aforementioned TQMf, which is for the purpose of intensification. . pricing right on dissolving soap, J & red dissolving water is mixed with eukstragent in a ratio of 1: 1- 2. Sources of information taken into account in the examination I. Datent of the USA No. 2866781, CL. 26O-97.7, published. 1957.