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Extraction method for high purity octacosanol from rice bran

A technology of octacosanol and rice bran, which is applied in the field of extracting high-purity octacosanol from rice bran, can solve the problems of shortening the reaction time and reducing the number of distillations, and achieves shortening the reaction time, reducing the number of distillations, and extracting high rate effect

Inactive Publication Date: 2014-02-19
TIANJIN NAER BIOTECH
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Problems solved by technology

The extraction method of the present invention has a high extraction rate, significantly improves product quality, successfully solves the problem of difficult hydrolysis of bran wax, strengthens the transesterification reaction under ultrasonic conditions, shortens the reaction time, reduces the number of distillations, and improves the yield of reaction products and octacosanol content, is an extraction method with good application prospects

Method used

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Embodiment Construction

[0016] An optimal method for extracting octacosanol from rice bran comprises extracting oil and wax from rice bran, refining bran wax by hydrolysis, separating alkyd, distillation and fractionation to refine octacosanol.

[0017] The main process of this extraction method is as follows:

[0018] 1) SF-CO 2 Extraction of oil and wax in rice bran: the extraction pressure is 50MPa, the extraction temperature is 40°C, and the extraction time is 50min.

[0019] 2) Ultrasonic hydrolysis to refine bran wax: Weigh a certain amount of oil and wax in 1) and place it in a beaker, then add appropriate amount of distilled water and lye, put the ultrasonic probe in the beaker for 50 minutes to react, and measure its hydrolysis rate.

[0020] 3) Separation of alkyd by transesterification: using ultrasonic chemical transesterification to extract a mixture of high-carbon fatty alcohols from the refined rice bran wax in 2), wherein the ultrasonic power is 200W, the reaction temperature is 60°C...

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Abstract

The invention provides an extraction method for high purity octacosanol from rice bran. According to the method, the SF-CO2 extraction technology is used to extract grease and wax in rice bran, ultrasonic hydrolysis is employed for refining of bran wax, alcohol-acid separation is carried out by using a transesterification method, and the molecular distillation technology and high vacuum fractionation are utilized for refining and purification of octacosanol. The extraction method for octacosanol from rice bran is characterized by comprising the following steps: extracting grease and wax in rice bran by using the SF-CO2 extraction technology; refining bran wax through ultrasonic hydrolysis; carrying out alcohol-acid separation by using the transesterification method; refining octacosanol by using the molecular distillation technology and high vacuum fractionation; and preparing an octacosanol product with purity of more than 95%. The method has good application prospects.

Description

(1) Technical field: [0001] The invention provides a method for extracting high-purity octacosanol from rice bran, that is, using SF-CO 2 Extraction technology extracts the oil and wax in rice bran, uses ultrasonic hydrolysis to refine bran wax, and then uses ester exchange method to separate alkyd and acid, and uses molecular distillation technology and high vacuum fractionation to refine and purify octacosanol. (two) background technology: [0002] Rice bran is a very valuable food resource, which is rich in oil and wax. Bran wax is the main source of raw materials for the extraction of high-carbon fatty alcohols. It is rich in octacosanol and is a natural product with significant anti-fatigue functions. [0003] SF-CO 2 Extraction has increasingly wide applications in the fields of food, cosmetics, medicine, natural plant active ingredient extraction and petrochemical soil. In the process of extraction, ultrasonic hydrolysis, transesterification separation, application...

Claims

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Application Information

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IPC IPC(8): C07C31/02C07C27/02C07C29/88
CPCC07C29/92C07C31/02Y02P20/54
Inventor 龙蕾安海燕史洁魏志杰
Owner TIANJIN NAER BIOTECH
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