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Method for preparing diglyceride from exchange reaction of ester - ester

A technology of transesterification and diacylglycerol, which is applied in the preparation of ester groups and hydroxyl groups, fatty acid production, organic chemistry, etc., can solve the problems of unsuitability for industrial production, low utilization rate of lipase, complex reaction operation, etc., to achieve The effect of less investment in production equipment, fast response and simple process

Inactive Publication Date: 2007-05-09
HUANONG LOGISTIC DALIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a simple technological process, high utilization rate of lipase, and reaction in order to solve the problems in the above-mentioned prior art that the reaction operation is complex or the utilization rate of lipase is low or the reaction time is too long, and it is not suitable for industrial production. Fast speed, mild reaction conditions, low temperature, long life of biological enzyme preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Mix 1,000 grams of soybean oil and 1,000 grams of soybean oil monoacylglyceride evenly, heat to 45°C, add 400 grams of lipase Lipozyme RM IM, stir at 200 prm, and react for 50 minutes. Stand still and filter to separate the solid lipase. The reaction product was distilled through the first stage molecular distillation (140 ℃, vacuum degree 10 -3 millibar) to remove monoacylglycerides (reusable), by second-stage molecular distillation (temperature 230 ° C, vacuum 10 -3 mbar) is separated from triacylglycerides (which can be reused) to give diacylglycerides. The product quality indicators are shown in Table 2.

Embodiment 2

[0028] Mix 1,000 grams of safflower seed oil with 1,500 grams of soybean oil monoacylglyceride evenly, heat to 50°C, add 300 grams of lipase Novozym 435, stir at 200 prm, react for 45 minutes, let stand and filter to separate the solid lipase. Below with example 1. The product quality indicators are shown in Table 2.

Embodiment 3

[0030] 1000 grams of rapeseed oil and 1500 grams of rapeseed oil monoacylglycerides are mixed homogeneously, heated to 50 ℃, reactant passes through the column type continuous reactor (with jacketed glass column: L=38cm, o.d.=5cm, i.d.=2.6cm, 50°C). The reaction product was distilled through the first stage molecular distillation (140 ℃, vacuum degree 10 -3millibar) to remove monoacylglycerides (reusable), by second-stage molecular distillation (temperature 230 ° C, vacuum 10 -3 mbar) is separated from triacylglycerides (which can be reused) to give diacylglycerides. The product quality indicators are shown in Table 2.

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PUM

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Abstract

This invention discloses a method for preparing diacylglycerol by interesterification. The method solves the problems of complex process, low lipase utility and long reaction time faced by the present technique, and has such advantages as simple process, high lipase utility, high reaction rate, mild reaction conditions and long bio-enzyme life. The method comprises: mixing triacylglycerol and monoacylglycerol at a mol ratio of 1:(1-15), adding bio-enzyme 2-30 wt.% of total reactants, performing interesterification by lipase catalysis at 30-90 deg.C in an intermediate reactor or a continuous reactor, and performing molecular distillation to remove excess triacylglycerol and monoacylglycerol and obtain diacylglycerol.

Description

technical field [0001] The invention relates to a method for preparing diacylglyceride by transesterification, which belongs to the field of edible oil preparation. Background technique [0002] Diacylglycerides not only have the use and nutritional functions of triacylglycerides in food, but also differ in the process of human metabolism, avoiding the adverse effects of triglycerides in traditional oils on the human body. sn-1,3-diacylglycerol is the esterification product of glycerol 1,3-hydroxyl and long-chain fatty acid. Compared with triglycerides in traditional oils, sn-1,3-diacylglycerides can inhibit the accumulation of fat in the body and have the function of lowering blood lipids, which is mainly due to the absorption and absorption of triacylglycerides and diacylglycerides. difference in metabolism. Unlike triacylglycerides, sn-1,3-diacylglycerides cannot be hydrolyzed into 2-monoacylglycerides in the small intestine, but sn-1(3)-monoacylglycerides are produced....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/03C07C69/003C11C3/00
Inventor 杨天奎徐辉孙东弦
Owner HUANONG LOGISTIC DALIAN
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