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Method for distillation separation of mixture of nervonic acid and erucic acid from acer truncatum oil

A technology of distillation separation and molecular distillation, which is applied in the separation/purification of carboxylic acid compounds, chemical instruments and methods, and the preparation of organic compounds, etc. It can solve the problems of many stages of molecular distillation, high distillation temperature, and low resource utilization , to achieve the effects of low operating temperature, favorable absorption and utilization, and fewer stages of molecular distillation

Active Publication Date: 2009-05-13
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of method that uses molecular distillation technology to separate nervic acid and its precursor (erucic acid) from ingot maple oil, to overcome prior art molecular distillation stage number is many, distillation temperature is high, resource utilization rate is low The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) 500 grams of maple ingot seeds are crushed and loaded into the extractor, the supercritical carbon dioxide extraction temperature is 45° C., the pressure is 30 MPa, the separation temperature is 60° C., and the pressure is 8 MPa to obtain 60 grams of maple ingot oil;

[0026] (2) After mixing 20 milliliters of absolute ethanol with 40 milliliters of ingot maple oil, add 2 grams of NaOH, and react for 2 hours at a temperature of 70 ° C. After the product is separated from glycerin, the catalyst is eluted with water, and unreacted ethanol is removed by distillation to obtain Ingot Maple Oil Ethyl Ester 30ml;

[0027] (3) Separation of erucic acid and ethyl nervate: Carry out two-stage molecular distillation under different vacuum degree and temperature conditions to the prepared ingot maple oil ethyl ester, the first stage, vacuum degree 0.2Pa, temperature 136 ℃, light Components enter the second stage of molecular distillation with a vacuum of 6 Pa and a temperature ...

Embodiment 2

[0030] (1) 5000 grams of maple ingot seeds are crushed to obtain 480 grams of maple ingot oil by pressing;

[0031] (2) After mixing 20 milliliters of absolute ethanol with 120 milliliters of ingot maple oil, add 8 grams of KOH, and react for 1 hour at a temperature of 76 ° C. After the product is separated from glycerin, the catalyst is eluted with water, and unreacted ethanol is removed by distillation to obtain Yuanbao Maple Oil Ethyl Ester 92ml;

[0032] (3) Separation of erucic acid and ethyl nervate: Carry out two-stage molecular distillation under different vacuum degree and temperature conditions to the prepared ingot maple oil ethyl ester, the first stage, vacuum degree 0.8Pa, temperature 143 ℃, light Components enter the second stage of molecular distillation with a vacuum of 8Pa and a temperature of 125°C. The heavy fractions of the second stage of molecular distillation are collected and analyzed by gas chromatography. The content of ethyl neurate is 36%, and the c...

Embodiment 3

[0035] (1) 500 grams of maple ingot seeds are pulverized and extracted with No. 6 solvent oil to obtain 70 grams of maple ingot oil;

[0036] (2) 20 milliliters of absolute ethanol containing 2% sodium ethylate was mixed with 20 milliliters of ingot maple oil, and reacted for 5 hours when the temperature was 50° C. After the product was separated from glycerin, the catalyst was eluted with water, and unreacted ethanol was removed by distillation. Obtain 15 ml of ingot maple oil ethyl ester;

[0037] (3) Separation of erucic acid and ethyl nervate: Carry out two-stage molecular distillation under different vacuum degree and temperature conditions to the prepared ingot maple oil ethyl ester, the first stage, vacuum degree 0.5Pa, temperature 140 ℃, light Components enter the second-stage molecular distillation with a vacuum of 6 Pa and a temperature of 128°C. The heavy fractions of the second-stage molecular distillation are collected and analyzed by gas chromatography. The conte...

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Abstract

The invention relates to a method for distilling and separating a mixture of nervonic acid and erucidic acid from acer truncatum oil molecules. The method comprises the following steps: acer truncatum seeds are subjected to supercritical carbon dioxide extraction method, a leaching method, or a squeezing method to obtain acer truncatum oil; a mixture of anhydrous ethanol and the acer truncatum oil is added with a catalyst and reacts for 1 to 5 hours at a temperature of between 50 and 80 DEG C; a product is separated to obtain glycerol and remove unreacted ethanol to obtain acer truncatum oil ethyl ester; the acer truncatum oil ethyl ester is subjected to molecular distillation under the conditions of controlling vacuum degree and temperature to obtain mixed fatty acid ethyl ester rich in the erucidic acid and the nervonic acid; and the mixed fatty acid ethyl rich in the erucidic acid and the nervonic acid is saponified and is added with acid to adjust the PH value to be neutral, is washed, is subjected to fatty acid extraction through an organic solvent and the organic solvent removal to obtain a product. The method has the advantages of low operation temperature and high utilization rate of resource.

Description

[0001] Field [0002] The invention relates to a method for separating nervic acid and erucic acid from ingot maple oil by molecular distillation technology. technical background [0003] Nervous acid is cis-15-tetradecenoic acid, which is a long-chain monounsaturated fatty acid. Nervous acid is an important component of biofilm in nerve tissue, and a symbolic component of medulla in cerebrosides. Nervous acid is an essential high-level nutrient for the growth, redevelopment and maintenance of nerve cells, especially brain cells, optic nerve cells, and peripheral nerves. It is a treasure for nourishing the brain. Nervous acid is not only suitable for daily brain nutrition and health care of healthy people, but especially suitable for pregnant women, infants, the elderly, mental workers, brain diseases and brain injuries, optic nerve nutrition, and vision protection people. In addition, nervonic acid can significantly reduce blood lipids, reduce blood viscosity, inhibit plate...

Claims

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Application Information

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IPC IPC(8): C07C57/03C07C51/42C07C27/02
CPCC11C3/003
Inventor 侯相林张元
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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