SU1013458A1 - Process for producing vegetable oil - Google Patents

Abstract

A METHOD of MANUFACTURING OF A VEGETABLE OIL, including the extraction of oil-containing material with a liquid solvent and countercurrent purging it with vapors with recirculation of the latter, as well as the distillation of the resulting miscella, characterized in that, in order to intensify. extraction and reduction of energy costs by implementing "simultaneously with the extraction of partial pre-distillation of miscella, the temperature of the mixture of material and solvent at the beginning of extraction is maintained between 50-60 ° C, and the solvent vapor is fed at a temperature of 75-90 ° C , providing in the process of extS (On the creation of a foam mode.

Description

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The invention relates to the oil industry and can also be used in the biochemical industry; microbiological and perfumery industry. To extract oils from natural raw materials.

A known method for the production of vegetable oil from natural raw materials by a single or multi-stage extraction process followed by distillation of the obtained extract tl j.

There is also known a method for the production of vegetable oils from highly olive raw materials by a two-stage countercurrent extraction solvent with an intermediate extraction of material C2. The closest is the method of producing pactic oil, which involves the extraction of oil-containing material with a liquid solvent and countercurrent blowing it in pairs with recycling of the latter, as well as distillation of the resulting Cz1 miscella.

However, the known methods do not allow for a sufficiently high intensification of the process, and there are high energy costs associated with heat losses during the transfer of miscella to distillation.

The aim of the invention is to intensify the extraction and reduce energy costs by carrying out, at the same time as extracting, a partial pre-distillation of miscella.

The goal is achieved by the fact that according to the method of production of vegetable oil, including the extraction of oil-containing material with a liquid solvent and countercurrent blowing it in pairs with recirculation of the latter, as well as distillation of the obtained miscella, the temperature of the mixture of material with solvent at the beginning of extraction is maintained within 5–6 ° C solvent vapors are fed at a temperature of yS-SO C, ensuring the creation of a foam regime in the extraction process.

The method is carried out as follows.

The source material after moisture-heat treatment is fed to a countercurrent apparatus, for example, of a column type, in which in the upper part the 1Telp solution returned from the condenser is mixed with the condensate, withstand the hydronic module 0,, P.

The stirring process is intensified by bubbling the extractant vapors rising from the bottom. The vapor velocity during the bubbling of 0.10, 8 m / s. Next, the antirting movement of the contacting phases is carried out: in this case, the liquid phase is enriched with metal by scrap due to its extraction from the solid phase, as well as distillation of the formed miscella, when it is moved, to a higher temperature zone;

The concentration of the resulting miscella reaches jO-GO. At the same time there is a corresponding depletion of the solid phase with oil. To a concentration of 1 in oil or less.

Upon reaching a predetermined concentration of oil in the solid phase, the mixture of material and extractant is sent for separation, carried out by one of the known methods (sedimentation, centrifugation, filtration, decantation). Separated liquid

(miscella) is sent to a film-type evaporator, where part of the solvent is distilled off, and the resulting vapors with a temperature of 75-9 ° C are fed to the extraction zone, where they give part

its heat to the liquid phase, ensuring the distillation process in the extraction-distillation zone. In this way, an internal solvent is performed. An additional amount of solvent is fed for com- missioning its loss with the solid phase and miscella for further processing, the appropriate amount of fresh solvent is introduced into the condensate.

maintaining the specified hydronic module,

The proposed method allows to reduce the extraction time compared with the known method from 50 minutes to 30 minutes, the energy consumption from 900 kg of steam / oil to 400 kg of steam / oil, the oil content of oil instead of 1 is 0.8%, which means the losses are reduced oils with meal

With the known method, the ratio of vapor and liquid phases is O., which does not allow the creation of a foam mode, and only the mode of concentration of solvent vapors on a relatively colder solid material. Foam regime begins when the ratio of vapor and liquid phases is 0.5 and at a ratio of more than 1.0 goes into fly mode.

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The proposed method provides low frequencies, the imposition of a higher intensification of the extra-solid phase accelerates by 20-30% by combining the diffusion process, like oils, from the extraction process with the process of distilled surfaces of solid particles, and , while in the foam layer came from the capillaries. Economic efkayut turbulent pulsations high-effect will be -3 million rubles.

Claims (1)

METHOD FOR PRODUCING VEGETABLE OIL, including extraction of oil-containing material with a liquid solvent and countercurrent purging of it with vapors with recirculation of the latter, as well as distillation of the obtained miscella, such as in order to intensify it. extraction tion and reducing energy costs by implementing · simultaneously with the extraction of partial preliminary distillation miscella, the temperature of the material mixture with the solvent at the beginning of extraction is maintained in the range 50-S0 ° C and the solvent vapor is supplied at a temperature., g 75 ~ 90 ^L C, providing in the process of extraction, the creation of a foam regime. , SU 1013458 1013 ^ 53