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Preparation method of partial glyceride

A technology of glycerides and triglycerides, which is applied in the field of preparation of some glycerides, can solve the problems of poor mutual solubility of reaction substrates, slow reaction speed, long reaction time, etc., and achieve conversion rate, product separation efficiency, and fast reaction speed , the effect of fast reaction rate

Inactive Publication Date: 2011-09-21
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of long reaction time, slow reaction speed, large energy consumption and high production cost in the preparation of monoglyceride and diglyceride at present due to the poor solubility of the reaction substrate

Method used

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  • Preparation method of partial glyceride
  • Preparation method of partial glyceride
  • Preparation method of partial glyceride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: The basic catalyst KOH is completely dispersed in glycerin to form a glycerol catalyst mixture. The quality of catalyzer is 0.1% of oil weight, and soybean oil and alcohol phase are preheated respectively, and control glycerin phase and oil phase mol ratio are 3: 1, pump into fiber reactor with metering pump (the diameter of glass fiber is 12 μ m, In a reactor with a length of 40 cm and an inner diameter of 3 cm), the reaction temperature is controlled at 150° C., and the residence time of the reaction materials in the reactor is 15 min. Sampling and analyzing the reaction conversion ratios of monoglyceride and diglyceride from the outlet of the reactor were 25% and 40%, respectively.

Embodiment 2

[0036] Example 2: Completely disperse the basic catalyst NaOH in glycerin to form a glycerol catalyst mixture. The quality of catalyzer is 0.2% of oil weight, and rice bran oil and alcohol phase are preheated respectively, and control glycerin phase and oil phase mol ratio are 4: 1, pump into fiber reactor with metering pump (the diameter of glass fiber is 12 μ m, In a reactor with a length of 70 cm and an inner diameter of 3 cm), the reaction temperature is controlled at 180° C., and the residence time of the reaction materials in the reactor is 22 min. Sampling and analyzing the reaction conversion ratios of monoglyceride and diglyceride from the outlet of the reactor were 30% and 50% respectively.

Embodiment 3

[0037] Embodiment 3: basic catalyst Ca(OH) 2 Completely dispersed in glycerin, the quality of catalyst is 0.1% of oil weight, and cottonseed oil and glycerin phase are preheated respectively, control glycerin phase and oil phase molar ratio to be 5: 1, pump into fiber reactor (stainless steel The diameter of the fiber is 8 μm, the length of the reactor is 30 cm, and the inner diameter is 3 cm), the reaction temperature is controlled at 200° C., and the residence time of the reaction materials in the reactor is 20 min. Sampling and analyzing the reaction conversion ratios of monoglyceride and diglyceride from the outlet of the reactor were 38% and 40%, respectively.

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Abstract

The invention belongs to the technical fields of chemical food and biological medicine and relates to a preparation method of partial glyceride. The method is characterized by comprising the following steps: mixing glycerin and catalyst to form glycerin-catalyst mixed solution, wherein the catalyst refers to alkali catalyst or enzyme catalyst; separately preheating raw material oil and the glycerin-catalyst mixed solution to 30-200 DEG C according to a ratio of raw material oil to glycerin, pumping the two materials in a fiber reactor at the same time, controlling the temperature of the fiber reactor to 0-200 DEG C, controlling the reaction temperature, using the mixed solution obtained by the reaction to perform molecular distillation or vacuum distillation and obtain monoglyceride and diglyceride. In the preparation method, the raw material oil and glycerin realizes liquid film contact on the surface of fiber in the fiber reactor, ester exchange reaction is performed under the action of the catalyst to prepare partial glyceride; and the reaction system is used to couple the reaction and separation step and ensure that the reaction is shifted in the direction of the product. Fiber contact is adopted to increase the contact area of the reactants, thus the reaction time can be shortened and the conversion rate and the separation efficiency can be increased.

Description

technical field [0001] The invention belongs to the technical fields of chemical food and biomedicine, and relates to a preparation method of partial glycerides. technical background [0002] Monoglycerides, diglycerides and their mixtures Monoglycerides and diglycerides are the most widely used emulsifiers with the longest history in food, and their current usage exceeds half of the total emulsifier usage. Some glycerides are structural lipids in which one or two fatty acids in triglycerides are replaced by hydroxyl groups, including monoglycerides and diglycerides. Because of the coexistence of two hydrophilic hydroxyl groups and one hydrophobic alkyl group in the monoglyceride molecule, its emulsifying performance is increased. Therefore, monoglyceride is a high-efficiency surfactant that can emulsify, foam, disperse, defoam, Anti-starch aging and other effects, widely used in various food fields, is the most widely used emulsifier in food. The use of monoglycerides exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11C3/06C11C3/10C12P7/64
Inventor 杨天奎杨柳牟英
Owner DALIAN UNIV OF TECH
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