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Preparation method of taurine intermediate sodium taurate and preparation method of taurine

A technology of sodium taurine and taurine, applied in the direction of sulfonic acid preparation, sulfonate preparation, chemical instruments and methods, etc., can solve the problems of separation difficulty, high production cost, equipment blockage, etc., and achieve cost reduction and saving Energy, concentration-enhancing effect

Active Publication Date: 2020-12-01
ZHEJIANG NHU CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Acidification with sulfuric acid is likely to produce a large amount of inorganic salts such as sodium sulfate, resulting in difficult separation, equipment blockage, and high production costs.

Method used

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  • Preparation method of taurine intermediate sodium taurate and preparation method of taurine
  • Preparation method of taurine intermediate sodium taurate and preparation method of taurine
  • Preparation method of taurine intermediate sodium taurate and preparation method of taurine

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preparation example Construction

[0067] The invention provides a preparation method of sodium taurate, a taurine intermediate. The preparation method comprises the following steps:

[0068] S1, providing sodium isethionate and ammonia source;

[0069] S2, placing the sodium isethionate and the ammonia source in an ammonolysis reactor for ammonolysis reaction to obtain a mixture containing the taurine intermediate sodium taurate, wherein the ammonia source The mol ratio of ammonia to the sodium isethionate is more than 25:1.

[0070] In step S1, the ammonia in the ammonia source is used as an aminating agent. The ammonia source is at least one of ammonia water mixture and liquid ammonia. The mass fraction of ammonia in the ammonia-water mixture is 20%-30%. The reason why the mol ratio of the ammonia in the ammonia source to the sodium isethionate is set to be more than 25:1 is because considering that the higher the ratio of ammonia in the system, the more the positive reaction direction is promoted, The ...

Embodiment 1

[0121] Add 200kg of ammonia water with a concentration of about 25% and 101kg of liquid ammonia (the molar ratio of ammonia to sodium isethionate is 25:1) to 170kg of sodium isethionate aqueous solution with a concentration of about 15% to form a mixture, and the mixture is added After the pressure reaches 18Mpa, it is preheated to 280°C by the preheater, and then enters the ammonolysis reactor for reaction. The ammonolysis reaction temperature is 280°C, the pressure is 18MPa, and after 30 minutes of reaction, the ammonolysis solution removes ammonia to obtain sodium taurate The solution is 320Kg, the content of sodium taurine is 7.2%, and the calculated yield of sodium taurine is 90.9%.

Embodiment 2

[0123] Add 200kg of ammonia water with a concentration of about 25% and 372kg of liquid ammonia (the molar ratio of ammonia to sodium isethionate is 70:1) to 170kg of sodium isethionate aqueous solution with a concentration of about 15% to form a mixture, and the mixture is added After the pressure reaches 18Mpa, it is first preheated to 280°C by the preheater, and then enters the ammonolysis reactor for reaction. The ammonolysis reaction temperature is 280°C, and the pressure is 17.8MPa. After 30 minutes of reaction, the ammonolysis solution removes ammonia to obtain taurine The sodium solution is 319Kg, the sodium taurine content is 7.82%, and the calculated yield of sodium taurine is 98.4%.

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Abstract

The invention provides a preparation method of taurine intermediate sodium taurate. The preparation method comprises the following steps: providing sodium hydroxyethyl sulfonate and an ammonia source;placing the sodium isethionate and the ammonia source in an ammonolysis reactor for an ammonolysis reaction to obtain a mixture containing taurine intermediate sodium taurate, wherein the molar ratioof ammonia in the ammonia source to the sodium isethionate is 25: 1 or above. The invention also provides a preparation method of taurine.

Description

technical field [0001] The invention relates to the technical field of taurine preparation, in particular to an ammonolysis reaction system, a preparation method of taurine intermediate sodium taurate and a preparation method of taurine. Background technique [0002] Taurine (2-aminoethanesulfonic acid), also known as taurocholic acid and taurobilin, is white crystal or powder, odorless, non-toxic, and slightly sour. It is a non-protein amino acid, one of the important amino acids necessary for the human body, and has unique pharmacological and nutritional health effects. Taurine can be widely used in medicine, food additives, optical brighteners, organic synthesis and other fields, and can also be used as biochemical reagents, wetting agents, buffers, etc. Western developed countries have generally used taurine in medicine and food additives. [0003] The preparation methods of taurine mainly include biological extraction method, fermentation method and chemical synthesis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C303/02C07C309/14B01D61/44
CPCC07C303/32C07C303/02B01D61/445C07C309/14B01D61/44C07C303/22B01D3/06B01D2311/04B01D2311/263C07C309/08B01J3/008B01J19/2465B01J19/2475
Inventor 陈志荣姚祥华彭俊华潘映霞何孝祥徐淞华吴晓东方向
Owner ZHEJIANG NHU CO LTD
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