Method for preparing octacosanol and triacontanol from rice bran wax

A technology of octacosanol and triacontanol, applied in chemical instruments and methods, preparation of oxygen-containing compounds, preparation of organic compounds, etc., can solve problems such as difficult hydrolysis, long reaction time, harsh reaction conditions, etc., and achieve The effect of short reaction time, low production cost and low price

Inactive Publication Date: 2012-01-11
HEILONGJIANG WANHEYUAN GREASE
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Since rice bran wax is a higher fatty acid ester, its hydrolysis is difficult and the reaction conditions are harsh, and the reaction time is long. The existing processes have long reaction time, and sometimes high temperature and high pressure conditions need to be added.

Method used

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  • Method for preparing octacosanol and triacontanol from rice bran wax

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Experimental program
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Embodiment Construction

[0013] 1. Add 1200g of rice bran hair wax, 232g of calcium hydroxide, and 3800ml of water into a 1000ml reactor, and use P=150 w f=150KHz ultrasonic wave 19, heated to 90-95°C, 0.05MPa, reacted for 2 hours.

[0014] 2. Cool down to room temperature, the product in the reaction system forms a hard lump, separate it and separate it from the mother liquor for 20, discard the reaction mother liquor 5, and wash the lump product with clean water for many times until the pH value is medium sex.

[0015] 3. Put the resultant 7 in an oven at 105°C and dry for 21 to constant weight to obtain 7223g of mixed alcohol and fatty acid calcium and pulverize it into powder.

[0016] 4. Transfer 7223g of mixed alcohol and fatty acid calcium into another 1000ml reactor, and carry out circular extraction 22 with 700ml ethanol at t=95°C. After cooling the raffinate, distill off the solvent to obtain fatty acid calcium 8.

[0017] 5. After the extraction mother liquors 6 are combined, crystallizat...

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Abstract

The invention discloses a method for preparing octacosanol and triacontanol from rice bran wax, which comprises the steps of: adopting an oxide or a hydroxide of alkaline-earth metal as a hydrolyst; hydrolyzing the rice bran wax through ultrasonic waves; separating and extracting fatty alcohol with the adoption of ethanol as an extracting agent; and separating the octacosanol and the triacontanol through a molecular distillation technology. The alkaline-earth metal is the hydrolyst; the time of the ultrasonic hydrolysis reaction can be shortened for 10 hours or higher than that of the general method, specifically from 12-16 hours to 2 hours or lower; the hydrolysis ratio is improved by 2 times; and the hydrolysis product is easily separated from impurities and the mother liquid. The invention has the characteristics of low requirement on reaction condition, normal temperature and pressure, low toxicity of auxiliary raw materials, low production cost, short reaction time and high purity and is easy to industrialized production.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a method for preparing octacosanol and triacontanol from rice bran wax. Background technique [0002] At present, the known production processes of octacosanol and triacontanol mainly include 1. Wax saponification and decomposition, and soap removal to extract fatty alcohol. 2. Wax saponification decomposition, organic solvent extraction of fatty alcohol. 3. Alcoholysis, remove fatty acid lower alcohols by vacuum distillation to obtain fatty alcohols. 4. The wax is decomposed by acid or alkali, and then the fatty alcohol is leached by supercritical fluid. But no matter which method is used, the vegetable wax must be hydrolyzed first. Because rice bran wax belongs to higher fatty acid higher fatty ester, its hydrolysis is more difficult to carry out and reaction condition is harsh, and reaction time is longer, and existing technology all has the problems such as long reaction time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/02C07C27/02
Inventor 刘志刚于开涛
Owner HEILONGJIANG WANHEYUAN GREASE
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