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Preparation process of high-purity alpha-ethyl linolenate

A preparation technology of ethyl linolenate, which is applied in the field of preparation of unsaturated fatty acids and α-ethyl linolenate, can solve the problems of high energy consumption, difficulty in industrialization, and large pollution, and achieve long storage time, Effects of process simplification, energy consumption and pollution reduction

Inactive Publication Date: 2019-02-22
燕园泽龙(涿鹿)生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a process for industrially preparing high-purity ethyl α-linolenic acid by using vegetable oil rich in linolenic acid as raw material through esterification, freezing crystallization, falling film evaporation and other technical means to solve the current problem. There are problems such as high energy consumption, heavy pollution, and difficulty in industrialization in existing technologies

Method used

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  • Preparation process of high-purity alpha-ethyl linolenate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Detection and pretreatment: The purchased perilla oil (α-linolenic acid content ≥ 62%) is tested for physical and chemical indicators such as content, acid value, and peroxide value, and prepared for treatment.

[0025] 2. Carry out ethyl esterification to perilla oil:

[0026] (1) Put 1000 kg of perilla oil into the esterification tank, and then add 350 kg of absolute ethanol (C 2 h 5 OH) and 4 kg of sodium ethoxide solution (C 2 h 5 ONa) was used as a catalyst, the temperature was heated to 78°C, and the reaction was carried out for 0.5 hours;

[0027] (2) After the reaction is over, add about 40 kg of water to deactivate the catalyst;

[0028] (3) Collect the products after esterification, including fatty acid ethyl ester, excess ethanol, water, glycerin and other mixtures;

[0029] 3. One-time purification by short-path distillation: send the esterified product to the short-path distillation equipment unit, and distill through the secondary thin-film evapora...

Embodiment 2

[0033] 1. Detection and pretreatment: The purchased linseed oil (α-linolenic acid content ≥ 52%) is tested for physical and chemical indicators such as content, acid value, and peroxide value, and prepared for processing.

[0034] 2. Ethylating linseed oil:

[0035] (1) Put 1000 kg of linseed oil into the esterification tank, and then add 350 kg of absolute ethanol (C 2 h 5 OH) and 4 kg of sodium ethoxide solution (C 2 h 5 ONa) was used as a catalyst, the temperature was heated to 78°C, and the reaction was carried out for 0.5 hours;

[0036] (2) After the reaction is over, add about 40 kg of water to deactivate the catalyst;

[0037] (3) Collect the products after esterification, including fatty acid ethyl ester, excess ethanol, water, glycerin and other mixtures;

[0038] 3. One-time purification by short-path distillation: send the esterified product to the short-path distillation equipment unit, and distill through the secondary thin-film evaporator (control the tempe...

Embodiment 3

[0042] 1. Detection and pretreatment: The purchased peony seed oil (α-linolenic acid content ≥ 42%) is tested for physical and chemical indicators such as content, acid value, and peroxide value, and prepared for processing.

[0043] 2. Carry out ethyl esterification to peony seed oil:

[0044] (1) Put 1000 kg of peony seed oil into the esterification tank, and then add 350 kg of absolute ethanol (C 2 h 5 OH) and 4 kg of sodium ethoxide solution (C 2 h 5 ONa) was used as a catalyst, the temperature was heated to 78°C, and the reaction was carried out for 0.5 hours;

[0045] (2) After the reaction is over, add about 40 kg of water to deactivate the catalyst;

[0046] (3) Collect the products after esterification, including fatty acid ethyl ester, excess ethanol, water, glycerin and other mixtures;

[0047] 3. One-time purification by short-path distillation: send the esterified product to the short-path distillation equipment unit, and distill through the secondary thin-film...

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Abstract

The invention discloses a preparation process of high-purity alpha-ethyl linolenate, and belongs to the technical field of preparation of unsaturated fatty acids. The preparation process comprises thefollowing steps: (1) carrying out detection and pretreatment: detecting physical and chemical indexes of raw oil and carrying out preparation treatment; (2) carrying out ethyl esterification on the raw oil; (3) carrying out short-range distillation for primary purification; (4) carrying out freezing crystallization; and (5) carrying out short-range distillation for secondary purification to obtain a high-purity alpha-ethyl linolenate product with the content of alpha-linolenic acid of more than or equal to 83%. The preparation process provided by the invention has the advantages of low energyconsumption, low production cost, small environmental pollution, and capability of carrying out large-scale and continuous industrial production, and the produced alpha-ethyl linolenate is high in purity and yield, almost has no solvent residue, and is clear in color, superior in quality and long in shelf life.

Description

technical field [0001] The invention relates to the technical field of preparation of unsaturated fatty acids, in particular to the technical field of preparation of ethyl α-linolenic acid. Background technique [0002] α-linolenic acid, namely octadecadenoic acid, is one of the omega-3 series of unsaturated fatty acids, an important nutrient necessary for the human body, and an important component of human brain cells and tissue cells. α-linolenic acid has obvious effects on promoting brain development of infants, preventing cardiovascular and cerebrovascular diseases, lowering blood pressure, regulating blood lipids, delaying aging, anti-allergic, and inhibiting the occurrence and metastasis of cancer. In terms of acquisition channels, α-linolenic acid cannot be synthesized by the human body itself, nor can it be synthesized by other nutrients, and must be obtained through diet. In terms of absorption and intake, α-linolenic acid in the free state has poor stability and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C67/54C07C67/52C07C67/58C07C67/48C07C69/587C11C3/04C11C1/08C11C1/10
CPCC07C67/08C07C67/48C07C67/52C07C67/54C07C67/58C11C1/08C11C1/10C11C3/003C11C3/04C07C69/587
Inventor 郭春寅郭璐
Owner 燕园泽龙(涿鹿)生物科技有限公司
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