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Compound containing DAG and the method for preparing the same

A technology containing diacylglycerol and diacylglycerol is applied in the field of compositions containing diacylglycerol, can solve the problems of high melting point, increased production cost and high cost, and achieves the advantages of simple production process, reduced production cost and prevention of arteriosclerosis. Effect

Inactive Publication Date: 2007-09-26
杨天奎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This reaction is rapid and the product is easy to separate, but the yield of the product diacylglycerol is low, and only 1 mole of diacylglycerol is obtained from 1 mole of triacylglycerol; the content of saturated fatty acid residues and double saturated acylglycerol in the obtained product is also high, so the product It has a high melting point and is solid or semi-solid at room temperature; at the same time, lower alcohols can easily inactivate lipase, shorten the life of biocatalysts, and increase production costs
[0007] The enzymatic esterification synthesis method has the problems of fatty acid raw material preparation and side reactions, complex products, complicated purification process, high energy consumption and high cost
[0008] Regardless of the glycerol hydrolysis method or esterification synthesis method, the compatibility between the reactants in the reaction system is poor, the reaction operation is difficult, the yield of the target product diacylglycerol is limited, and the by-product monoacylglycerol and triacylglycerol cannot be effectively controlled. content; on the other hand, the products obtained from these reactions, especially the diacylglycerol products obtained by reacting vegetable oil rich in triacylglycerols, often have low unsaturation of fatty acid residues forming esters, which affects the product on the one hand. Form, solid or semi-solid at room temperature, inconvenient to take; on the other hand, the product has a high content of saturated fatty acids, which is not conducive to health

Method used

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  • Compound containing DAG and the method for preparing the same
  • Compound containing DAG and the method for preparing the same
  • Compound containing DAG and the method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Step 1: Preparation and Fractionation of Fatty Acids

[0079] 16 kg of sodium hydroxide (purity 96%) was dissolved in 70 kg of water, and added to the reaction tank, 100 kg of soybean oil was added, heated to 85°C, stirred (rotating speed 200rpm), after reacting for 4 hours, 50 kg of hot water was added, Slowly add hydrochloric acid (6mol / L), check the pH value of the system with pH test paper, keep the system acidic until the soap is completely dissolved (pH5 or so), and continue to stir for 1 hour. Stand for stratification, take out the fatty acid in the upper layer, wash with 30% (mass ratio) hot water at 80°C for several times until neutral, spin thin film evaporation and dehydration at 80°C for 1 hour to obtain crude fatty acid. The crude fatty acid is refined by short-path distillation at temperature (160° C.) and vacuum (<10 Pa).

[0080] Melt soybean fatty acid at 60°C, add solvent (acetone) in proportion and shake well (fatty acid / acetone, 1:3), keep warm at a...

Embodiment 2

[0097] Prepare the monoacylglycerol raw material according to the method of step 1 and step 2 of Example 1, and perform the following operations on the prepared monoacylglycerol raw material A;

[0098] Step 1: Conversion of monoacylglycerols to diacylglycerols

[0099] 500 grams of monoacylglycerol A are heated to 65° C., and the reactant is passed through a column continuous reactor filled with immobilized Geotrichum candidum lipase at a flow rate of 3.0 ml / min (jacketed glass column: L=38 cm, o.d.=5 cm, i.d. = 2.6 cm, 65°C). The reaction product was distilled at 100°C and vacuum (<10Pa) to remove the glycerol in the product; and at 190°C and vacuum (<5Pa) to distill the monoacylglycerol to obtain product II.

[0100] Step 4: Product Analysis

[0101] (1) According to mass percentage, the mass percentage content of diacylglycerol in product II is 95.1%, monoacylglycerol 1.6%, and triacylglycerol 3.2%;

[0102] (2) The molar percentage of saturated fatty acid in product II...

Embodiment 3

[0111] Step 1: Preparation of canola fatty acid fractionation liquid

[0112] The method is the same as step 1 in Example 1, wherein the soybean oil is replaced with double-low rapeseed oil to obtain the double-low rapeseed fatty acid fractionation liquid.

[0113] Step 2: Preparation of monoacylglycerol

[0114] Mix 360 grams of glycerin with 2000 grams of double-low rapeseed fatty acid fractionation liquid, stir (250rpm), heat to 60°C, add 200 grams of catalyst Lipozyme RM IM, vacuum (<100Pa), and react for 40 minutes; add 1000 grams of double-low rapeseed Seed fatty acid fractionation liquid, 160 grams of Lipozyme RM IM, reacted for 20 minutes; the catalyst was separated by vacuum filtration, and the liquid product was removed at 130° C. under vacuum (<10 Pa) to remove the remaining fatty acid and glycerol from the reaction to obtain monoacylglycerol raw material B, which The fatty acid composition is shown in Table 2.

[0115] Types of fatty acids

16:0

...

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Abstract

The invention provides a method for preparing a compound with diacylglyceride, via enzyme catalysis. The inventive compound comprises aliphatic acid glyceride as main component, wherein the diacylglyceride comprises 20-50% diacylglyceride, 20-40% oleic acid acyl-linolic acid acyl glycerin, 15-40% 2-oleic acid acyl glycerin, 3-10% linolenic acid acyl-linolic acid acyl glycerin, and 0-3% 2-glyceryl palmitate. And the content of diacylglyceride of inventive product is higher than 94%, with high unsaturated degree of fatty acid, lower than 3% of 2-santuraed acyl glycerin, and lower than 5% 3-acyl glycerin, while the compound is clear and transparent at normal temperature or lower temperature. And the invention uses 1-acyl glycerin as material with low cost, wide resource and low producing lost.

Description

technical field [0001] The invention relates to a composition containing diacylglycerol, especially a product with relatively high content of diacylglycerol and high degree of unsaturation; the invention also relates to a preparation method of the composition. Background technique [0002] In addition to being used as an important additive in food, medicine, feed and cosmetics, diacylglycerol has attracted more and more attention in the food field because of its excellent physiological activity. Compared with traditional vegetable oils rich in triacylglycerols, diacylglycerols can not only effectively provide calories, essential fatty acids, fat-soluble vitamins, etc. for the human body on the basis of ensuring the taste of oils, but also prevent obesity and lower blood lipids. This is mainly due to the difference in the absorption and metabolism of triacylglycerol and diacylglycerol in the human body: triacylglycerol is hydrolyzed in the small intestine to form β-monoacylgl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L1/30A23D7/02A23L1/035A23K1/16A61K31/7032A61P3/06A61P9/12A61P9/10A23K20/158A23L33/115
Inventor 杨天奎
Owner 杨天奎
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