Method and system for extracting and separating natural VE from plant oil deodorizing distillate

A technology for deodorizing distillate and vegetable oil, which is applied in the field of extraction and separation of natural VE, can solve the problems of aggravated VE decomposition, increased production cost, and is not easy to control, and achieves high concentration ratio and yield, simple operation process, and operation cost. low effect

Inactive Publication Date: 2010-08-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molecular distillation equipment is expensive, which increases the production cost
[0004] Apply vacuum distillation technology to extract natural VE, first remove fatty acid or fatty acid methyl ester by distillation, then collect fractions of different temperature sections under a certain vacuum, control the appropriate temperature to obtain VE concentrate, due to the difference in system pressure, such temperature The segment is not easy to control, and the yield of the resulting product is not very high
CN1037769C uses

Method used

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  • Method and system for extracting and separating natural VE from plant oil deodorizing distillate
  • Method and system for extracting and separating natural VE from plant oil deodorizing distillate
  • Method and system for extracting and separating natural VE from plant oil deodorizing distillate

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Experimental program
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Effect test

Embodiment 1

[0034] Apply saponification esterification-rectification method to extract the method for concentrating natural VE, comprise the steps:

[0035]1) Saponification and acidification: Take 20g of soybean oil deodorization distillate (acid value 70.7, saponification value 143.2, mixed VE5.42%), add 60g methanol, 7.001g 45% KOH aqueous solution, stir and reflux at 70°C for 45min. Acidify with 25% hydrochloric acid aqueous solution, wash and dry with water, and remove the solvent by rotary evaporation to obtain 18.72 g of the product with an acid value of 138.9 and a VE preservation rate of 91.6%.

[0036] 2) Esterification: Take 20g of the above-mentioned saponified acidification product, react with 56g of methanol, the catalyst is NKC-9 strong acid type cation exchange resin (6g in dosage), 4A molecular sieve is used as water absorbing agent (4g in dosage), stir and reflux at 70°C for 4h . 19.76 g of the esterification product was obtained, the acid value was 1.47, and the VE pre...

Embodiment 2

[0043] Basic technology is with embodiment 1, and concrete operation parameter is as follows:

[0044] 1) Saponification and acidification: Take 20g of soybean oil deodorization distillate (acid value 70.7, saponification value 143.2, mixed VE5.42%), add 80g methanol, 8.910g 45% KOH aqueous solution, stir and reflux at 70°C for 80min. Acidify with 25% sulfuric acid aqueous solution, wash and dry with water, and remove the solvent by rotary evaporation to obtain 18.89 g of the product, with an acid value of 140.3 and a VE preservation rate of 94.6%.

[0045] 2) Esterification: take 20g of the above-mentioned saponified acidification product, react with 24g of methanol, the catalyst is NKC-9 strong acid type cation exchange resin (the dosage is 2g), 4A molecular sieve is used as the water absorbing agent (the dosage is 6g), stir and reflux at 65°C for 5h . 19.36 g of the esterified product was obtained, the acid value was 2.86, and the VE preservation rate was 95.4%. The ester...

Embodiment 3

[0052] Basic technology is with embodiment 1, and concrete operation parameter is as follows:

[0053] 1) Saponification and acidification: Take 20g of soybean oil deodorization distillate (acid value 71.6, saponification value 142.1, mixed VE8.39%), add 40g methanol, 5.684g 45% KOH aqueous solution, stir and reflux at 65°C for 30min. Acidify with 25% hydrochloric acid aqueous solution, wash and dry with water, and remove the solvent by rotary evaporation to obtain 18.86 g of the product with an acid value of 137.2 and a VE preservation rate of 92.1%.

[0054] 2) Esterification: Take 20g of the above-mentioned saponified acidification product, react with 40g of methanol, the catalyst is NKC-9 strong acid type cation exchange resin (4g in dosage), 4A molecular sieve is used as water absorbing agent (5g in dosage), stir and reflux at 68°C for 4h . 19.48 g of the esterification product was obtained, the acid value was 2.48, and the VE preservation rate was 95.1%. The esterified...

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Abstract

The invention provides a method and a system for extracting and separating natural VE from plant oil deodorizing distillate. The method comprises the following steps of: carrying out saponification and acidifying reaction to convert glyceride, sterol ester and the like in the deodorizing distillate into free fatty acid, glycerin and sterol; carrying out low temperature crystallization and separation on sterol; carrying out methyl esterification action by taking a strong acid type ion exchange resin as a catalyst; and replacing the molecule distillation and vacuum distillation equipment by using vacuum rectifying tower equipment. The invention has the advantages that the return function of the rectifying section is increased; the effect of multi-stage separation can be achieved by one-pass operation; high-quality fatty acid methyl product and high-concentration purity VE product at the tower bottom can be obtained; and the VE recovering rate in the rectifying process reaches more than 90%.

Description

technical field [0001] The invention proposes a method and system for extracting and separating natural VE from vegetable oil deodorization distillates. Background technique [0002] Natural VE has attracted people's attention due to its antioxidant and physiological functions, and is mainly used in medicine, food, cosmetics, feed and plastics and other industries. Soapstock and deodorized distillates produced in the refining process of vegetable oils are important raw materials for the production of natural VE by domestic and foreign enterprises. [0003] The main components of the deodorized distillate are: free fatty acids, glycerides, sterols and sterol esters, VE, hydrocarbons and a small amount of ketones, aldehydes, carbohydrates, etc. Extraction of natural VE from deodorized distillate usually adopts extraction, molecular distillation, vacuum distillation, adsorption, chromatography and other methods. The application of extraction technology to extract natural VE r...

Claims

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Application Information

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IPC IPC(8): C07D311/72
Inventor 李永进丁辉徐世民张艳华
Owner TIANJIN UNIV
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