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Quick preparation method of glycerin monostearate

A technology of glyceryl monostearate and stearic acid, which is applied in the field of chemical additives, can solve the problems of extremely high technical requirements, high product cost, cumbersome preparation process, etc., and achieve superior compounding performance and strong compounding performance Effect

Inactive Publication Date: 2013-01-02
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The molecular distillation process requires extremely high vacuum and high temperature technology, and the product cost is relatively high
In addition, there is also a group protection method to synthesize glyceryl monostearate, no di-ester and tri-ester are generated during the reaction, and the purity of the obtained monoglyceride is relatively high, but the preparation process is relatively cumbersome and the post-treatment is relatively complicated

Method used

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  • Quick preparation method of glycerin monostearate
  • Quick preparation method of glycerin monostearate
  • Quick preparation method of glycerin monostearate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put metered 11mmol glycerin, 20mmol acetone, 9mmol stearic acid, 0.5mmol copper p-toluenesulfonate, and 2mmol anhydrous sodium sulfate into a 50ml round bottom flask successively; place the flask in a microwave radiation heating device, set Set the microwave radiation power to 300W, time 4min, start the reaction, after the reaction, cool to room temperature, stand still, hydrolyze to neutral with 2mol / L hydrochloric acid, wash with distilled water three times (10ml each time). dry. The product conversion rate is 92%. The product has a melting point of 62-63°C.

Embodiment 2

[0027] 10.5mmol glycerol, 20mmol acetone, 9mmol stearic acid, 0.5mmol copper p-toluenesulfonate, and 2mmol anhydrous sodium sulfate after metering were dropped into a 50ml round-bottomed flask in turn; the flask was placed in a microwave radiation heating device, Set the microwave radiation power to 300W, time 4min, start the reaction, after the reaction, cool to room temperature, stand still, hydrolyze to neutral with 2mol / L hydrochloric acid, wash with distilled water three times (10ml each time). dry. The product conversion rate is 89%. The product has a melting point of 62-63°C.

Embodiment 3

[0029] Put metered 12mmol glycerin, 20mmol acetone, 9mmol stearic acid, 0.5mmol copper p-toluenesulfonate, and 2mmol anhydrous sodium sulfate into a 50ml round bottom flask successively; place the flask in a microwave radiation heating device, set Set the microwave radiation power to 300W, time 4min, start the reaction, after the reaction, cool to room temperature, stand still, hydrolyze to neutral with 2mol / L hydrochloric acid, wash with distilled water three times (10ml each time). dry. The product conversion rate is 91%. The product has a melting point of 62-63°C.

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Abstract

The invention discloses a quick preparation method of glycerin monostearate. In the method, the glycerin monostearate is prepared by placing glycerol, copper p-toluene sulfonate, stearic acid, anhydrous sodium sulfate and acetone into a reactor and placing the reactor in a microwave radiation heating device for microwave heating; wherein the microwave radiation power is 220 to 400 W; and the heating reaction time is 4 to 5 min. The quick preparation method for the glycerin monostearate adopts a microwave radiation solvent-free coupling organic synthesis technology and has the advantages of high reaction speed, simple reaction course, high product purity and simple post processing.

Description

technical field [0001] The invention relates to a method for preparing an alcohol-based nonionic surfactant, in particular to a method for rapidly preparing glycerol monostearate, and belongs to the technical field of chemical auxiliaries. Background technique [0002] With the increasing awareness of environmental protection, more and more attention has been paid to the environmental safety of surfactants, such as the discussion on whether surfactants are harmful to environmental safety, the ecology and toxicity assessment of surfactants, etc. At the same time, many people worry that as a wide variety of daily chemical products continue to become people's daily necessities, such as toothpaste, soap, dishwashing detergent, washing powder (agent) and various cosmetics, etc., everyone will use them more or less every day. Take a certain amount of surfactant in a small amount. Therefore, there is a growing demand for research and development of biodegradable and environmentall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/30C07C67/08
Inventor 赫庆鹏李永新江健
Owner LIAOCHENG UNIV
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