Method for synthesizing taurine

A technology of taurine and sodium hydroxyethanesulfonate, applied in the field of chemical synthesis technology of chemicals, can solve the problems of insufficient taurine purity, complicated process, low yield and the like, and achieves increasing taurine content and reducing Production cost, the effect of improving yield

Inactive Publication Date: 2009-07-22
SHAYANG TIANYI MEDICINE IND
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Problems solved by technology

The disadvantage of this process is that the process is complicat

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[0013] Sodium bisulfite, ethylene oxide, and sodium hydroxide (volume ratio of raw materials are: sodium bisulfite: ethylene oxide: sodium hydroxide=600:400:15) are placed in the reactor, and at a temperature of 70 At ~75°C and pressure ≤0.1MPa, it reacts to form sodium isethionate. Then sodium isethionate and 400L of liquid ammonia are synthesized at high temperature (260-270°C) and high pressure (19MPa) to generate 2-sodium aminoethanesulfonate (sodium taurate). Finally, add sulfuric acid to the obtained 2-aminoethanesulfonic acid sodium solution, and when the pH value reaches 7.5, stop adding sulfuric acid, carry out neutralization reaction at a temperature of 70°C, and centrifugally filter to obtain 2-aminoethanesulfonic acid (taurine ) of crude crystals. Refining, drying and packaging of crude taurine: crude product 780KG (content greater than 95%), purified water 2400L, after adding pharmaceutical grade activated carbon 3KG, enter the decolorization kettle and heat up t...

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Abstract

The invention relates to a method for synthesizing taurine. The production technique comprises the steps: A. sodium bisulfite, epoxyethane and sodium hydroxide are placed in a reaction kettle to produce sodium isethionate through reaction; sodium isethionate reacts with liquid ammonia at temperature of 260 DEG C and 270 DEG C and a pressure of 18.5MPa to 19MPa to synthesize and produce sodium 2-amino ethyl sulfonate; B. a sodium 2-amino ethyl sulfonate solution is added with sulphuric acid and goes through centrifugal filtration, thus obtaining the rough crystals of taurine; and C. the rough crystals of taurine are refined and dried. The method has the advantage that by changing the temperature and pressure for reaction, the yield of sodium 2-amino ethyl sulfonate (the intermediate product for synthesizing and preparing taurine) is improved; the occurrence possibility of side reaction is lowered; and the content of impurities is obviously reduced.

Description

technical field [0001] The invention relates to a chemical synthesis process of chemicals. Specifically relate to the chemical synthesis technique of taurine. technical background [0002] Taurine (also known as 2-aminoethanesulfonic acid). For the biological extraction of taurine, due to the limitation of the source of raw materials, cost and output, the current method for preparing taurine by general synthesis method is: add sodium bisulfite and ionic membrane liquid caustic soda when the temperature reaches 50-70 ℃ Put ethylene oxide into the reactor, the pressure is normal pressure, and the end point is when the pH is greater than 12, enter the synthesis tower for synthesis reaction, concentrate the content of bovine sodium to 45%, enter the neutralization tank, and then cool down to 25°C and discharge Centrifugation, solid-liquid separation in the centrifuge, the mother liquor is concentrated and desalted by centrifugation. After centrifugation, the crude taurine is ...

Claims

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Application Information

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IPC IPC(8): C07C309/14C07C303/02
Inventor 郭文胜杨成雄
Owner SHAYANG TIANYI MEDICINE IND
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