Technological method

A technology of conjugation and fatty acids, applied in the field of technology, can solve problems such as unqualified products and reduced overall product purity

Active Publication Date: 2011-11-02
LIPID NUTRITION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] It has been found that when large-scale production is carried out using ethanol and water as described in EP-A-1493801, the disadvantage is that the product contains non-negligible amounts of ethyl esters of conjugated fatty acids
Although said ethyl esters are present in relatively small amounts (typically 1.5-2.5% by weight of the product), their removal from the product is so difficult that the overall purity of the product is reduced to undesired levels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Equip a 1000-liter jacketed pressure reactor with a mechanical stirrer and a nitrogen gas introduction device. The temperature of the reactor was controlled by injecting a stream of steam or cold water into the jacket.

[0052] The raw material used in this method is safflower oil (300kg), alkali (flaky sodium hydroxide: 110kg) and the mixture of ethanol (280kg) and water (20kg) used as solvent.

[0053] The conjugation reaction of safflower oil was carried out as follows: 300 kg of safflower oil was placed in a reactor. Dissolve 110kg of flaky sodium hydroxide in 300kg of solvent and add it to the reactor. Under the protection of nitrogen, stir the resulting mixture and heat it to 150°C. The reaction lasts for 3 hours. The mixture in the pressure reactor was cooled to 120°C and transferred to another reactor to remove ethanol.

[0054] 100kg of saturated sodium chloride aqueous solution was added to the resulting mixture and stirred for 15 minutes, and the layers wer...

Embodiment 2

[0057] Embodiment 2 (comparative example)

[0058] Repeat Example 1, but without the step of adding saturated sodium chloride solution.

[0059] result

[0060] The results are analyzed as follows:

[0061] Example

[0062] Compared with the method of the prior art, the method of the present invention greatly reduces the content of ethyl ester.

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PUM

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Abstract

The invention relates to a method for preparing conjugated binary unsaturated fatty acids with 12-24 carbon atoms or polyunsaturate fatty acids or salts thereof or esters thereof; the method comprises the following steps of: reacting non-conjugated free fatty acids, salts thereof or esters thereof with alkali in the existence of an alcohol solvent; and then separating conjugated fatty acids from a reaction mixture, wherein steps for separating the conjugated fatty acids from the reaction mixture comprises enabling the reaction mixture to be in contact with an aqueous solution of salts and removing a solution containing salts from the solid phase of conjugated fatty acid salts and liquid phase of at least part of solvent.

Description

technical field [0001] The present invention relates to a method for preparing conjugated dibasic unsaturated fatty acid or polyunsaturated fatty acid with 12-24 carbon atoms, or its salt, or its ester. Background technique [0002] It is well known that conjugated isomers of long-chain polyunsaturated fatty acids have potential economic interests, such as their application in food manufacturing. Examples of such fatty acids include conjugated linoleic acid (CLA) isomers; typically, the cis 9, trans 11 and trans 10, cis 12 isomers are the most abundant isomers in CLA and when chemically The two often exist in a weight ratio of 1:1 during synthesis. Conjugated isomers can usually be prepared from the corresponding non-conjugated fatty acids by isomerization in the presence of a base. [0003] EP-A-0799033 discloses a method of using ethylene glycol to prepare conjugated isomers, but the disadvantage of this method is that it is difficult to completely remove ethylene glycol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/353C07C51/47C07C57/12C07C67/333C07C67/56C07C69/587C11C3/14
CPCC07C67/333C11C3/14C07C51/353C07C51/50C07C57/12C07C69/587C07C67/34
Inventor 严友春程书红J·蒙斯特
Owner LIPID NUTRITION
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