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Preparation method of anhydrous betaine

A technology of anhydrous betaine and betaine, which is applied in the preparation of organic compounds, chemical instruments and methods, and cyanide reaction preparation, etc., can solve the problems of large investment, low product purity, and low production capacity, so as to increase production capacity and save energy. cost effect

Active Publication Date: 2012-07-11
山东奥博生物科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a production process of anhydrous betaine, which aims to solve the common problems of large investment, low product purity and low production capacity in the existing production process of anhydrous betaine. The method is of great significance for promoting large-scale production

Method used

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  • Preparation method of anhydrous betaine
  • Preparation method of anhydrous betaine

Examples

Experimental program
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Effect test

Embodiment 1

[0021] (1) 2 tons of water, 1.5 tons of chloroacetic acid, and 0.84 tons of sodium carbonate are dropped into the reaction kettle at normal temperature. When feeding materials, pay attention to the feeding speed, so as not to separate out a large amount of carbon dioxide;

[0022] (2) Feed 0.95 tons of trimethylamine after fully reacting. When feeding, the reaction temperature is controlled at 55 ° C. When PH = 7, stop feeding. During the feeding process of trimethylamine, the pressure of the reactor is not allowed to exceed 0.1Mpa. After the amine feed is completed, the temperature is 50°C and the stirring is started, and the temperature is kept for 3 hours, and then the material is moved to the concentrated reaction kettle;

[0023] (3) Keep the steam pressure stable at 0.3MPa, heat the material to concentrate, the vacuum pressure is stabilized at -0.08MPa, stop heating when the material temperature reaches 115°C, stir for 20 minutes, and then move the supernatant to the liqu...

Embodiment 2

[0031] (1) 2 tons of water, 1.5 tons of chloroacetic acid, and 0.84 tons of sodium carbonate are dropped into the reaction kettle at normal temperature. When feeding materials, pay attention to the feeding speed, so as not to separate out a large amount of carbon dioxide;

[0032] (2) Feed 0.95 tons of trimethylamine after fully reacting. When feeding, the reaction temperature is controlled at 65°C. Stop feeding when PH=7. During the feeding process of trimethylamine, the pressure of the reactor is not allowed to exceed 0.1Mpa, trimethylamine After the amine feed is completed, the temperature is 60°C and the stirring is started, and the temperature is kept for 3 hours, and then the material is moved to the concentrated reaction kettle;

[0033] (3) Keep the steam pressure stable at 0.3MPa, heat the material to concentrate, the vacuum pressure is stabilized at -0.08MPa, stop heating when the material temperature reaches 115°C, stir for 20 minutes, and then move the supernatant t...

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Abstract

The invention discloses a preparation method for preparing anhydrous betaine through chemical synthesis. High-purity anhydrous betaine of which the purity is over 99.9 percent is produced by performing procedures including neutralizing, substituting, concentrating, primary desalting, secondary desalting, evaporating, crystalizing, centrifuging, drying and the like on chloroacetic acid, sodium carbonate and trimethylamine serving as major raw materials through a process for combining electrodialysis desalting, evaporative desalting and a boiling dryer. In the process, the original methanol dehydration and double-core dryer drying equipment is eliminated, and obtained metahydrate betaine is directly dried by using a boiling drier, so that cost on each ton can be saved by about 1,200 yuan, and the yield is increased by 3 tons per day.

Description

technical field [0001] The invention relates to a production process for preparing anhydrous betaine through chemical synthesis, in particular to a production process for preparing anhydrous betaine with chloroacetic acid, sodium carbonate and trimethylamine as main raw materials. Background technique [0002] Betaine is a natural vitamin-like substance with the molecular formula (CH 3 ) 3 NCH 2 COO, with a molecular weight of 117, is non-toxic, highly hygroscopic, sweet, and has a special smell. It exists widely in animals and plants and has important functions. Its value has been affirmed by countless scientific researches and practices. Betaine is very versatile. For example, in medicine, betaine can be used to produce drugs for the treatment and prevention of liver diseases, and raw materials for antibiotics. Betaine can be used as a food additive, which can play a good role in promoting the health care of the elderly and the growth and development of children. In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/12C07C227/18
Inventor 曹俊山郝秀利王淑华杨成功
Owner 山东奥博生物科技有限公司
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