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Method for producing diglyceride

A diglyceride and production method technology, which is applied in the field of synthesizing diglyceride, can solve the problems of high viscosity, difficulty, and separation of reaction substrates, reduce the speed of inactivation and loss, reduce production costs, and improve reaction efficiency effect

Inactive Publication Date: 2003-08-27
广东润隆再生资源股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both methods a and b have problems such as high viscosity of the reaction substrate, slow reaction speed, many by-products of free fatty acids, and difficult separation, which increase the production cost of diglyceride; method c has the disadvantages of difficult control of the reaction, many by-products, and difficult separation and other shortcomings, not suitable for industrial applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 1000g refined soybean oil in the temperature-controllable band stirring reactor, the free fatty acid of soybean oil is 0.1%, add 50g methyl alcohol at a uniform speed, stir and make it fully miscible with oil, add 10gLipozyme RM IM (Novozymes company product) simultaneously, Methanol was added within 15 hours, and the above mixture was reacted at 55° C. for 20 hours at a stirring speed of 300 rpm, and the immobilized lipase was recovered by filtration and reused. The reaction product was washed with water and centrifuged to remove methanol and glycerol, and then the residual methanol was removed by vacuum distillation at 110°C, and then molecular distillation was carried out at 0.5Pa and 150°C to obtain fatty acid methyl ester and glyceride fractions respectively. Fatty acid methyl esters can be used as biodiesel, and glyceride fractions can be used as healthy oils and fats. The mass percentage of each component in the glyceride fraction is as follows: 28.1% of trig...

Embodiment 2

[0021] Add 1000g of refined rapeseed oil and soybean oil mixture in the same proportion to the controlled temperature zone stirring reactor, the free fatty acid in the oil is 0.15%, then add 18g of methyl alcohol, stir to make it fully miscible, then add 50g Novozyme435 (Novozymes company product) , after reacting at 50° C. for 8 hours at a stirring speed of 300 rpm, the immobilized lipase was recovered by filtration and reused. The reaction product was washed with water and centrifuged to remove methanol and glycerin, then the residual methanol was removed by vacuum distillation at 110°C, and then molecular distillation was carried out at 0.5Pa and 146°C to obtain fatty acid methyl ester and glyceride fractions. Fatty acid methyl esters can be used as biodiesel, and glyceride fractions can be used as healthy oils and fats. The mass percentage of each component in the glyceride fraction is as follows: triglyceride 78.8%, diglyceride 18.8%, monoglyceride 2.1%, free fatty acid 0...

Embodiment 3

[0023] Add 1000g of refined Mortierella oil to the controlled temperature zone stirred reactor, the free fatty acid of Mortierella oil is 0.5%, then add 100g Novozyme435 (Novozymes company product), continuously and evenly feed 75g absolute ethanol, complete within 2 hours , Stir fully during feeding to make it miscible with the reaction system rapidly, after reacting at 45°C for 2.5 hours, filter and recover the immobilized lipase for reuse. The reaction product was washed with water and centrifuged to remove ethanol and glycerin, and then the remaining ethanol was removed by vacuum distillation at 110°C, and then molecular distillation was carried out at 0.5Pa and 150°C to obtain fatty acid ethyl ester and glyceride fractions. Fatty acid ethyl esters can be used as biodiesel, and glyceride fractions can be used as healthy oils and fats. The mass percentage of each component in the glyceride fraction is as follows: 25.2% of triglyceride, 68.6% of diglyceride, 5.6% of monoglyc...

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PUM

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Abstract

The invention refers to a method of producing diglyceride, mixing lower alcohol and triglyceride to react under fixed lipase, separating reaction product to get the diglyceride, and at the same time getting the by-product, fatty acid lower alcohol ester; the lower alcohol is monobasic alcohol, C number less than 3, the triglyceride is refined animal oil, or vegetable oil, or microbial oil or their mixture, and the fixed liphase is fixed on carrier by physical adsorption, and covalent cross-linking.

Description

technical field [0001] The invention relates to a method for synthesizing diglycerides, in particular to a method for producing diglycerides in which lower alcohols and triglycerides are used as reaction substrates. Background technique [0002] Diacylglycerol is a fat molecule with only two fatty acid chains. The vast majority of natural oils are triglycerides, with only a small amount of diacylglycerol, usually less than 5%. Diglycerides and triglycerides are absorbed and metabolized very differently in humans and animals. The metabolism of triglycerides is first to generate monoglycerides and free fatty acids through the action of digestive enzymes mainly composed of pancreatic lipase, and then after being absorbed into the human body through the small intestine villi, a large part of them is re-synthesized into triglycerides. Therefore, excessive consumption of glycerol Triesters can increase blood lipids and endanger human health. Diacylglycerol is metabolized by panc...

Claims

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Application Information

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IPC IPC(8): C07C67/03C11C3/02
Inventor 杨博王旋王永华李秋生姚汝华
Owner 广东润隆再生资源股份有限公司
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