Method for preparing taurine

A technology of taurine and taurine, which is applied in the preparation of sulfonic acid, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of increasing environmental protection risks, the limitation of utilization rate of taurine mother liquor, etc., and achieves reduction of production energy consumption. , The effect of improving product yield and simple production process

Inactive Publication Date: 2019-11-15
HUBEI GRAND LIFE SCI & TECH CO LTD
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  • Abstract
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Problems solved by technology

[0011] Chinese patent CN107056659B has introduced a kind of method that utilizes acidic cation exchange resin to replace sulfuric acid to neutralize sodium taurine to obtain taurine. In this reaction system, ethylene glycol and ethanolamine species will inevitably be produced. If it is not processed, the utilization rate of taurine mother liquor will be limited, which will increase the risk of environmental protection

Method used

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  • Method for preparing taurine
  • Method for preparing taurine
  • Method for preparing taurine

Examples

Experimental program
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Effect test

Embodiment 1

[0048] This embodiment mainly introduces the process of performing various treatments on the acidic cationic resin column used in the present invention.

[0049] Pretreatment: Wetly load Amberlyst 15 type acidic cation exchange resin into the exchange column, retain the water layer about one-fifth of the column height in the upper layer of the resin, and vibrate the ion exchange column in a small range to make the resin dense. Under the protection of nitrogen, use 2BV, 0.1mol / L sulfurous acid to pass through the resin in the ion exchange column at a flow rate of 2.0BV / h, then wash the residual sulfurous acid not absorbed by the resin with deionized water, and monitor the effluent liquid online When the pH value of the effluent is about 6.5±0.5, stop washing.

[0050] Regeneration treatment: first wash the acidic cation exchange column with deionized water, when the pH value is about 7, the material is cleaned, and then use 2BV, 0.1mol / L sulfurous acid solution to pass through ...

Embodiment 2

[0054] The purpose of this example is to verify the acidifying effect of acidic cation exchange resin on sodium taurate and the mixture of sodium taurate and sodium isethionate under laboratory conditions. Get the sodium taurate solution of 0.5mol / L respectively, and the sodium taurate (i.e. taurine alkali metal salt) of 0.5mol / L and the sodium isethionate (i.e. isethionate) of 0.5mol / L Acid and alkali metal salts) mixed solution at normal temperature, with the speed of 1.0BV / h, pass through different types of acidic cationic resins (Amberlyst 15 type, 732 type) respectively, detect resin to pure sodium taurate and sodium taurate and sodium isethionate mixtures, we have found that these resins have acidifying capabilities both for sodium taurate and for mixtures of sodium taurate and sodium isethionate, especially type 732 resin and Amberlyst 15 Type resin has a good acidification effect, and the one-time acidification rate can reach more than 85%.

[0055] The taurine alkali...

Embodiment 3

[0057] This example simulates the industrial method for preparing taurine by the ethylene oxide method to obtain a solution similar to the mother liquor composition after taurine is extracted, that is, containing about 14% of sodium taurine and about 14% of sodium isethionate. A mixed solution of about 10%, ethanolamine content of about 5.5%, and ethylene glycol content of about 4.5%.

[0058] Concrete method is: in the beaker of 10 liters, put into the ethylene glycol of 270g, the ethanolamine of 330g, the sodium taurate of 840g, the sodium isethionate of 600g, add pure water, to the scale of 5 liters, It is configured into a solution with 4.5% ethylene glycol content, 5.5% ethanolamine content, 14% sodium taurate content and 10% sodium isethionate content.

[0059] In other similar occasions, different proportions of the above-mentioned solutions can be prepared according to actual needs, all of which can produce the required technical effects of the present invention.

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Abstract

The invention relates to a method for preparing taurine. The method comprises the following steps: performing treatment on a solution containing an alkali metal salt of 2-hydroxyethanesulphonic acid through an acidic cation exchange resin column to acidify the alkali metal salt of the 2-hydroxyethanesulphonic acid to form 2-hydroxyethanesulphonic acid, and performing collection to obtain an eluate; and performing recrystallization on the eluate to obtain the 2-hydroxyethanesulphonic acid, performing aminolysis on the 2-hydroxyethanesulphonic acid, and performing acidification to obtain the taurine. In the process of removing impurities in the taurine reaction system provided by the invention, no other organic solvent is introduced to remove the impurities, the acidic cation exchange resincolumn is adopted to acidify the alkali metal salt of the 2-hydroxyethanesulphonic acid and an alkali metal salt of the taurine to form an acid with lower solubility, and organic impurities and/or electrically neutral impurities are easy to separate by recrystallization; and the method provided by the invention can improve a conversion rate of the alkali metal salt of the 2-hydroxyethanesulphonicacid, has a simple production process, can reduce production energy consumption, and facilitates environmental protection.

Description

technical field [0001] The invention relates to the technical field of taurine production, in particular to a method for preparing taurine by removing impurities from a reaction system for preparing taurine. Background technique [0002] Taurine is a special amino acid in living organisms. It has a wide range of physiological functions, such as promoting the brain tissue and intellectual development of infants and young children, enhancing the antioxidant capacity of cells, etc., and has been widely used clinically in cardiovascular diseases, diabetes, digestive tract diseases, nervous system diseases, eye diseases, etc. Treatment of a range of diseases. Due to its wide application, biological extraction can no longer meet the human demand for taurine. More than 90% of taurine in the market now comes from chemical synthesis methods, such as ethanolamine method and ethylene oxide method. So far, Chinese enterprises have used chemical synthesis to prepare taurine, and the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/14C07C303/02C07C303/44
CPCC07C303/02C07C303/44C07C309/14
Inventor 孙华君江汝泳郭晨彭洪波钱志强
Owner HUBEI GRAND LIFE SCI & TECH CO LTD
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