SU1666526A1 - Method for production of vegetable oil - Google Patents

Abstract

The invention relates to the oil and fat industry, in particular to methods for producing vegetable oils. The aim of the invention is to improve the quality of the target product and to obtain additionally high purity oils. The method involves grinding the oil-containing seeds, moistening the resulting pulp with a mixture of water, polyethylene glycol ester of soapstock fatty acids as a surfactant and gasoline or hexane as a solvent at a ratio of water: surfactant: solvent from 29.8: 0.2: 70 to 14: 1 : 85, separation of the obtained miscella from the moistened grinding, extraction of the grinding with gasoline or hexane in a countercurrent with repeated successive passage through the forming matrices with simultaneous pressing, the separation of the miscella and distillation of the solution bodies of mistcell. The gasoline or hexane used for extraction additionally injected polyethylene glycol ester of coapstic fatty acids and water at a ratio of solvent: surfactant: water from 85: 0.5: 14.5 to 90: 1: 9. 1 cf.- ly. 1 tab.

Description

FIELD OF THE INVENTION The invention relates to the oil and fat industry and concerns methods for the production of vegetable oils.

The aim of the invention is to improve the quality of the target product and to obtain additionally high purity oils.

The crushed oil-containing seeds are moistened with a mixture of water, polyester glycol ester of coapstic fatty acids as surface-active substances (surfactants) and gasoline or hexane as a solvent at a ratio of water: surfactants: solvent 29.8: 0.2: 70-14: 1:85, the resulting miscella is separated from the moistened mill, and the mill catches are extracted with gasoline or hexane in countercurrent with multiple

sequentially passing through the molds with simultaneous pressing, the miscella is again separated and the solvent is distilled from the miscella. Gasoline or hexane used for extraction is additionally distilled, additional polyethylene glycol ester of additional fatty acids and water are added at a solvent: PAA ratio of 85 : 0.5: 14.5-90: 1: 9.

Under selected conditions, optimal conditions are provided for the recovery of oil. During the treatment of the first stage of the mixture with a mixture of water, polyethylene glycol ester of co-effluent fatty acids and gasoline or hexane, which is an oil-in-water emulsion,

ABOUT

moistening the gel part of the weave, displacing the lightly refined part of a high-quality oil with a minimum content of concomitant substances into a non-polar solvent and giving the weave an easily deformable form for its further extraction.

The use of the emulsion in the second stage of extraction allows, along with obtaining higher quality oil and meal, to reduce the consumption of gasoline or hexane, reduce the fire and explosion hazard of production and improve working conditions,

With a decrease in water content of less than 9% and a night vision of less than 0.2% in the extractant, it is not possible to obtain a stable oil-in-water emulsion, and with their increase over 29.8% and 1%, respectively, there is no further increase in the process intensification and quality improvement. In addition, when the moisture content is 29.8%, the processed pulp is saturated with moisture, which leads to complete denaturation of water-soluble proteins in the meal.

EXAMPLE, 100 g of crushed cotton seeds with passage through a 1 mm sieve 70%, number of cells opened 59.3%, initial fat content 32.4% and moisture 4.2% are placed in an extractor with a capacity of 1, 5 l, equipped with a water jacket and a stirrer, and treated with an emulsion of the type oil-in-water, water-containing, polyethylene glycol ester of copious fatty acids and gasoline in a ratio of 70: 0.5: 29.5 wt.% At a water ratio of 1: 1 and 25 ° C for 10 min. The resulting miscella is separated from the moistened mill and the solvent is distilled off to obtain a refined portion of cottonseed oil. The moistened semi-skim mint is then extracted with gasoline in a five-chamber laboratory extractor in a countercurrent with repeated sequential passage through the forming matrices with simultaneous -pressing at a water ratio of 1: 3 and

25 ° C for 5 minutes, the miscella is separated from the meal and the solvent is distilled off to obtain cottonseed oil and wet meal granules, which are dried in a soft mode to prevent the denaturation of water-soluble proteins.

The test results of the known and proposed methods are presented in the table.

As follows from the above data, the use of an oil-in-water emulsion type consisting of a mixture of water, polyethylene glycol ester of copious fatty acids and gasoline or hexane as an extractant improves the quality of the target product by reducing color and acid and obtaining an additional high-purity oil .

Claims (2)

1. A method of producing vegetable oil, including grinding oil-containing seeds, moistening the obtained cake with water, extracting it with gasoline or hexane in countercurrent with repeated sequential skipping through the forming dies with simultaneous pressing, miscella and distilling the solvent, characterized in that in order to increase the quality of the target product and to obtain an additional high-purity oil, in the process of moistening, preliminary extraction is carried out by adding polyethylene ester polyglycol ethers soapstochnyh fatty acids as a surfactant and gasoline or hexane as a solvent at a ratio of water. Surfactant: solvent 29.8: 0.2: 70-14: 1.85, respectively, followed by separation from the moistened mat preliminary miscella and distilling the solvent out of it. 2. A method according to claim 1, characterized in that polyethylene glycol soapstock fatty acids and water are added to gasoline or hexane during the extraction process at a solvent ratio: surfactant: water 85: 0.5: 14.5-90: 1: 9. The effect of the production method on the quality of vegetable oil