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Method for synthesizing and purifying high-purity fatty acyl monoglyceride

A technology of fatty acyl monoglycerol and purification method, which is applied in the field of food emulsifier preparation, can solve the problems of increasing the complexity of the process and making it difficult to break through 60%, and achieve the effects of saving equipment investment, shortening the process, and improving the utilization rate

Active Publication Date: 2011-11-16
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main disadvantages of the existing molecular distillation monoglyceride technique are: (1) the monoglyceride content in the glyceride layer obtained by the glycerolysis reaction once is generally 40-50%, and it is difficult to break through 60%
(3) Due to the neutralization of alkaline catalysis to produce a small amount of water, a wiped film evaporator is required for dehydration, which increases the complexity of the process

Method used

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  • Method for synthesizing and purifying high-purity fatty acyl monoglyceride

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Embodiment 1

[0032] The synthesis and purification process route diagram of the high-purity fatty acyl monoglyceride of the present embodiment is as follows figure 2 Shown:

[0033] (1) Synthesis of fatty acyl monoglycerides: Get 60g of soybean oil and 40g of soybean oil fatty acid into the reactor, add SO 4 2- / ZrO 2 -Al 2 o 3Solid acid catalyst (preparation method is CN02151526.3 with reference to publication number, the name is called " a kind of granular solid superacid catalyst and preparation method " Chinese patent) 0.3g, and reactor is evacuated to pressure and is 2000Pa, constantly stirs simultaneously, waits for Start timing when the temperature reaches 170°C, add 40g of glycerin (the ratio of the number of moles of fatty acids in soybean oil and soybean oil fatty acid to the number of moles of glycerin is 1:1.25) dropwise into the reaction kettle, the time of adding drops is 30min, and reflux Esterification and transesterification; control the temperature of the cooling wa...

Embodiment 2

[0037] The synthesis and purification process route diagram of the high-purity fatty acyl monoglyceride of the present embodiment is as follows figure 2 Shown:

[0038] (1) Synthesis of fatty acyl monoglycerides: Take 80g of hydrogenated oil and 20g of stearic acid into the reactor, add SO 4 2- / ZrO 2 -Al 2 o 3 Solid acid catalyst (preparation method is CN02151526.3 with reference to publication number, and the name is called " a kind of granular solid superacid catalyst and preparation method " Chinese patent) 0.2g, and reactor is evacuated to pressure and is 400Pa, constantly stirs simultaneously, waits for Start timing when the temperature reaches 200°C, add 48g of glycerin (the ratio of the moles of fatty acids in hydrogenated oil and stearic acid to the moles of glycerol is 1:1.5) dropwise into the reactor, and the time for adding drops is 40min. Reflux esterification and transesterification; control the cooling water temperature in the reflux condenser, so that the...

Embodiment 3

[0042] The synthesis and purification process route diagram of the high-purity fatty acyl monoglyceride of the present embodiment is as follows figure 2 Shown:

[0043] (1) Synthesis of fatty acyl monoglycerides: get stearic acid 100g into the reactor, add SO 4 2- / ZrO 2 -Al 2 o 3 Solid acid catalyst (preparation method is CN02151526.3 with reference to publication number, the name is called " a kind of granular solid superacid catalyst and preparation method " Chinese patent) 0.5g, and reactor is evacuated to pressure and is 10000Pa, constantly stirs simultaneously, waits for Start timing when the temperature reaches 230°C, add 32g of glycerin (the ratio of the number of fatty acids in stearic acid to the number of moles of glycerol is 1:1) dropwise into the reaction kettle for 45 minutes to carry out reflux esterification and transesterification reaction; control the temperature of the cooling water in the reflux condenser, so that the water generated by the esterifica...

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Abstract

The invention discloses a method for synthesizing and purifying high-purity fatty acyl monoglyceride, which comprises the following steps: (1) mixing fat, free fatty acid and a solid catalyst, vacuumizing, stirring, heating, obtaining a mixture of fat, adding glycerol into the mixture of fat, performing refluxing esterification and ester exchange reactions, controlling the temperature of cooling water in a reflux condenser to allow water generated in esterification to be pumped out under vacuum and allow glycerol to be condensed and refluxed, and demixing the products of the reaction, wherein the upper layer is a glyceride layer; (2) removing unreacted free fatty acid and glycerol from the glyceride layer through primary molecular distillation; and (3) subjecting the glyceride layer from which the free fatty acid and glycerol are removed to secondary molecular distillation, and obtaining a distillate and a distillation residue, wherein the distillate is high-purity fatty acyl monoglyceride and the distillation residue is diglyceride or triglyceride. When the method is used, the process is shortened, equipment investment is saved, and the primary yield of the product is increased greatly.

Description

technical field [0001] The invention belongs to the field of food emulsifier preparation, in particular to a method for synthesizing and purifying fatty acid monoacylglycerol. Background technique [0002] Food emulsifiers are the most widely used surfactants in the food industry. Currently, the amount of food emulsifiers used in the world exceeds 400,000 tons, while the amount of food emulsifiers used in my country is about 30,000 to 50,000 tons. Fatty acyl monoglycerides (abbreviated as monoglycerides) are the largest product in food emulsifiers. The output of monoglycerides in my country has reached 25,000-30,000 tons, accounting for about 40-60% of food emulsifiers. The molecularly distilled monoglyceride product with the highest market share is stearyl monoglyceride. [0003] Existing industrialized production process of high-purity molecular distillation monoglyceride such as figure 1 Shown (Liang Zhenming. Molecular distillation monoglyceride production process, Mod...

Claims

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Application Information

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IPC IPC(8): C07C69/30C07C69/58C07C69/587C07C67/08C07C67/54
Inventor 汪勇曹茜欧仕益
Owner JINAN UNIVERSITY
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