Method of reducing iodine value of glyceride

A technology of glyceride and iodine value, which is applied in the field of glyceride synthesis and processing, which can solve the problems of harsh process conditions and high temperature for reaction, and achieve the effects of less side reactions, mild reaction conditions and low iodine value

Active Publication Date: 2018-11-23
CABIO BIOTECH WUHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In industrial production, it is necessary to produce glycerides with low iodine value as raw materials for chemical production, but the existing methods of increasing the saturation of glycerides are mainly through chemical catalysis, and the reaction requires high temperature and harsh process conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh palmitic acid according to the palmitic acid residue amount of palm oil, so that the ratio of the palmitic acid residue in the reaction system to the total fatty acid residue is 90%, palm stearin 1000g and 1000ml normal hexane are put into four ports In a flask, after heating in a water bath until dissolved, mix with palmitic acid and sodium methoxide. Wherein, the molar ratio of sodium methylate and palmitic acid is 0.02.

[0031]Then, after feeding nitrogen gas, under the conditions of water bath temperature of 35°C and rotation speed of 400r / min, stir until uniform, then add 5g non-directional lipase Lipase DF "Amano" 15, keep stirring for 4 hours. The supernatant of the organic phase was obtained by centrifugation, the soap in the organic phase was removed by silica gel adsorption, and the free fatty acid was removed by molecular distillation to obtain a light yellow solid, and the content of palmitic acid at the sn-2 position was 88.5%.

[0032] Wherein, the...

Embodiment 2

[0034] Weigh palmitic acid and stearic acid according to the palmitic acid residues and stearic acid residues of palm oil, so that the ratio of palmitic acid residues and stearic acid residues in the reaction system to the total fatty acid residues is 92 %, put 1000g of palm oil stearin and 1200ml of n-hexane into a four-necked flask, heat it in a water bath until it dissolves, then mix it with palmitic acid, stearic acid, and sodium hydroxide, of which palmitic acid, stearic acid, and sodium hydroxide The molar ratio is 8:2:0.1. After feeding nitrogen, under the conditions of water bath temperature of 40°C and rotational speed of 350r / min, stir until uniform, then add 10g non-directional lipase LipaseAY30G5, keep stirring for 1 hour. Centrifuge to obtain the supernatant of the organic phase, use silica gel to absorb and remove the soap in the organic phase, and then molecularly distill to remove free fatty acids to obtain a light yellow solid, the total content of palmitic ac...

Embodiment 3

[0037] Weigh palmitic acid according to the palmitic acid residue amount of palm oil, be 94% so that the palmitic acid residue in the reaction system accounts for the ratio of total fatty acid residue, put palm stearin 1000g and 1500ml normal hexane into four ports In a flask, after heating in a water bath until dissolved, mix with palmitic acid and potassium hydroxide. Wherein, the molar ratio of potassium hydroxide and palmitic acid is 0.025.

[0038] Then, after feeding nitrogen, under the conditions of water bath temperature of 85° C. and rotating speed of 500 r / min, stir until uniform, then add 50 g of non-directional lipase Novozym 435, and keep stirring for 1 hour. The supernatant of the organic phase was obtained by centrifugation, the soap in the organic phase was removed by silica gel adsorption, and the free fatty acid was removed by molecular distillation to obtain a light yellow solid, and the content of palmitic acid at the sn-2 position was 91.3%.

[0039] Wher...

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Abstract

The invention relates to the technical field of synthesis and processing of glyceride, and specifically relates to a preparation method of reducing iodine value of glyceride. The preparation method ofreducing iodine value of glyceride includes catalytic reaction of glyceride, saturated fatty acid and alkali under the action of lipase to prepare the glyceride with low iodine value; the iodine value of glyceride is effectively reduced by sufficient amount of saturated fatty acid residues provided by salts of saturated fatty acids that are produced by corresponding saturated fatty acid and alkali in-situ and by catalytic action of non-directed lipase to allow milder reaction conditions with less side reactions.

Description

technical field [0001] The invention relates to the technical field of glyceride synthesis and processing, in particular to a method for reducing the iodine value of glyceride. Background technique [0002] In industrial production, it is necessary to produce glycerides with lower iodine value as raw materials for chemical production, but the existing methods for increasing the saturation of glycerides are mainly through chemical catalysis, and the reaction requires high temperature and harsh process conditions. Therefore, need badly a kind of simple process, the method that can effectively reduce glyceride iodine value. Contents of the invention [0003] The object of the present invention is to provide a method for reducing the iodine value of glycerides, which can increase the content of saturated fatty acids in glycerides, thereby effectively reducing the iodine value of glycerides, with simple reaction conditions and few side reactions. [0004] The present invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C1/02C11C3/10
CPCC11C1/02C11C3/10
Inventor 李翔宇陆姝欢张力文马凡提汪志明刘宏荣
Owner CABIO BIOTECH WUHAN CO LTD
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