Preparation method of highly-unsaturated flaxseed oil fatty acid

A linseed oil fatty acid and unsaturated technology, which is applied in the fields of fatty acid preparation/refining, fatty acid production, fatty acid chemical modification, etc., can solve the problems of large waste water discharge, easy thermal oxidation, thermal polymerization deterioration, etc., and achieves small waste water discharge. , Universal, low energy consumption, high iodine value

Inactive Publication Date: 2017-06-13
余海龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing highly unsaturated linseed oil fatty acid, which solves the problem of low product quality, high energy consumption, large waste water discharge, high-temperature rectification of unsaturated linolenic acid, which is prone to reactions such as thermal oxidation and thermal polymerization in the traditional fatty acid preparation method. spoilage problem

Method used

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  • Preparation method of highly-unsaturated flaxseed oil fatty acid

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Comparison scheme
Effect test

Embodiment 1

[0028] combine figure 1 , the preparation method of the highly unsaturated linseed oil fatty acid that the embodiment of the present invention 1 provides, comprises the following steps:

[0029] Step 1: Add 500kg of linseed oil soapstock into the acidification kettle, stir and heat to 90°C;

[0030] Step 2: Slowly add concentrated sulfuric acid with a concentration of 98% to the stirred and heated linseed oil soapstock for acidification for 1 hour, wherein the added amount of concentrated sulfuric acid is 5% of the weight of the linseed oil soapstock, and the pH value is 3;

[0031] Step 3: Keeping the temperature constant, adding a temperature of 90°C to the acidified linseed oil soapstock and washing with 5% sodium chloride solution in an amount of 5% of the weight of the linseed oil soapstock 10%, and repeated washing 3 times, after washing, the water in the lower layer was discharged to obtain the acidified oil in the upper layer;

[0032] Step 4: Put the acidified oil ...

Embodiment 2

[0039] The preparation method of the highly unsaturated linseed oil fatty acid that the embodiment of the present invention 2 provides comprises the following steps:

[0040] Step 1: Add 500kg of linseed oil soapstock into the acidification kettle, stir and heat to 95°C;

[0041] Step 2: Slowly add concentrated sulfuric acid with a concentration of 98% to the stirred and heated linseed oil soapstock for acidification for 2 hours, wherein the added amount of concentrated sulfuric acid is 8% of the weight of the linseed oil soapstock, and during acidification, the pH value is 4;

[0042] Step 3: Keeping the temperature constant, adding a temperature of 90° C. to the acidified linseed oil soapstock and washing with 8% sodium chloride solution in an amount of 8% by weight of the linseed oil soapstock 15%, and repeated washing 3 times, after washing, the water in the lower layer was discharged to obtain the acidified oil in the upper layer;

[0043] Step 4: Put the acidified oil ...

Embodiment 3

[0050] The preparation method of the highly unsaturated linseed oil fatty acid provided by the embodiment of the present invention 3 comprises the following steps:

[0051]Step 1: Add 500kg of linseed oil soapstock into the acidification kettle, stir and heat to 100°C;

[0052] Step 2: Slowly add concentrated sulfuric acid with a concentration of 98% to the stirred and heated linseed oil soapstock, and acidify for 0.5h, wherein the added amount of concentrated sulfuric acid is 10% of the weight of the linseed oil soapstock. During acidification, the pH value is 4;

[0053] Step 3: Keeping the temperature constant, adding a temperature of 95° C. to the acidified linseed oil soapstock, and washing with 10% sodium chloride solution by mass fraction, the amount of sodium chloride solution added is 1% of the linseed oil soapstock weight 20%, and repeated washing 2 times, after washing, drain the water in the lower layer to obtain the acidified oil in the upper layer;

[0054] Ste...

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Abstract

The invention discloses a preparation method of highly-unsaturated flaxseed oil fatty acid, relating to the technical field of agricultural product processing. The method comprises the following steps: adding flaxseed oil niger into an acidification kettle, stirring and heating; acidifying the stirred and heated flaxseed oil; washing the acidified flaxseed oil niger with water to obtain supernatant acidified oil; introducing the supernatant acidified oil into a dehydration pot, and dehydrating to obtain supernatant crude fatty acid; introducing the supernatant crude fatty acid into a hydrolysis tower, and hydrolyzing to obtain stratified crude fatty acid; introducing the stratified crude fatty acid into a dehydration tower, and carrying out dehydration and degassing to obtain the dehydrated degassed fatty acid; carrying out rectification on the dehydrated degassed fatty acid to remove plant asphalt; and introducing the rectified fatty acid into a stripping tower, and carrying out decolorization treatment to obtain the highly-unsaturated flaxseed oil fatty acid finished product. The prepared flaxseed oil fatty acid has the advantages of light color, high iodine value and high yield; and the method enhances the quality and application range of the flaxseed oil fatty acid.

Description

technical field [0001] The invention relates to the technical field of agricultural product processing, in particular to a preparation method of highly unsaturated linseed oil fatty acid. Background technique [0002] Flax for oil, also known as flax, is one of the five major oil crops in my country. It is mainly distributed in Inner Mongolia, Shanxi, Hebei and other places, with an annual output of 300,000-400,000 tons. Linseed oil is rich in α-linolenic acid, with a content of more than 45% and an unsaturated fatty acid content of more than 85%. It is known as "deep-sea fish oil on land". In recent years, with the attention of people on green and healthy food, flaxseed oil as a highly unsaturated nutritious oil is receiving more and more attention, and more and more enterprises are engaged in the processing and deep processing of flaxseed oil . Therefore, the by-products of linseed oil processing, such as soapstock, deodorized distillate, and linseed oil with a slightly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C1/10C11C1/04C11C1/08C11C3/00
CPCC11C1/04C11C1/08C11C1/10C11C3/00
Inventor 余海龙王东兴刘大良
Owner 余海龙
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