A recycling process for preparing taurine by aminolysis of sodium hydroxyethanesulfonate

A technology for aminolysis of sodium hydroxyethanesulfonate and sodium hydroxyethanesulfonate, which is applied in the field of recycling technology for the preparation of taurine from aminolysis of hydroxyethanesulfonate, can solve problems such as large environmental damage, and achieve zero emissions, Increase the income of by-products and realize the effect of recycling

Active Publication Date: 2021-06-29
吴江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some local process improvement methods recorded in the literature, but these methods all produce three kinds of industrial waste: sodium sulfate, activated carbon residue, and ammonia-containing wastewater. Large-scale production is very destructive to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of taurine: 21m of sodium bisulfite solution with a volume content of 44.8% is recycled. 3 Add the hydroxylation tank, start the circulating pump, add 1.16 tons of liquid caustic soda to make the pH of the reaction solution 4.5-5.0, add ethylene oxide, control the temperature during the process at 70-75°C, and the pH of the reaction is ≥ 9, then add 0.18 tons of sodium carbonate Adjust to pH ≥ 12. Cool down to normal temperature, transfer to ammonia absorption tank, add crude taurine centrifuged and concentrated mother liquor 2m 3 , evaporating and recovering water 20m 3 , open the liquid ammonia valve, start the ammonia absorption circulation pump, and absorb the ammonia content to be 24.5-25%. Start the high-pressure pump, transfer the ammonia absorption liquid into the synthesis system, and enter the flash evaporator through the heater, synthesis tower, and differential pressure reducing valve. Warm at 120-150° C. to obtain a flash liquid with a tau...

Embodiment 2

[0031] (1) Preparation of taurine: 20.5m of sodium bisulfite solution with a volume content of 45.5% is recycled. 3Add the hydroxylation tank, start the circulating pump, add 1.13 tons of liquid caustic soda to make the pH of the reaction solution 4.5-5.0, add ethylene oxide, control the temperature during the process at 70-75°C, and the pH of the reaction is ≥ 9, then add 0.25 tons of sodium carbonate Adjust to pH ≥ 12, cool down to normal temperature, transfer to ammonia absorption tank, add crude taurine centrifuged and concentrated mother liquor 2m 3 , evaporating and recovering water 20m 3 , start the ammonia absorption circulation pump, open the liquid ammonia valve, and feed the fugitive gas in Example 1. Subsequent operations were the same as in Example 1 to obtain 9.5 tons of sodium sulfate, 0.08 tons of activated carbon residue, and a taurine product.

[0032] (2), preparation of water glass product: 9.5 tons of sodium sulfate in (1), 4.8 tons of quartz sand, 1.2 t...

Embodiment 3

[0035] (1) preparation of taurine: 20m of sodium bisulfite solution with a volume content of 43.2% is circulated. 3 Add the hydroxylation tank, start the circulation pump, add 1.01 tons of liquid caustic soda to make the pH of the reaction solution 4.5-5.0, continuously feed the fugitive gas in Example 2, add ethylene oxide, control the temperature of the process at 70-75°C, and the reaction is completed pH ≥ 9, then add 0.16 tons of sodium carbonate to adjust to pH ≥ 12, the follow-up operation is the same as in Example 1, to obtain 9.0 tons of sodium sulfate, 0.04 tons of activated carbon residue, and obtain a taurine product.

[0036] (2), preparation of water glass product: 9.0 tons of sodium sulfate in (1), 2.8 tons of quartz sand, 0.5 tons of coal powder and 0.04 tons of activated carbon slag in (1) are mixed and packed into a smelting reduction furnace, heated and melted After reacting for a certain period of time, after discharging, water quenching, and dissolving into...

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PUM

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Abstract

The invention provides a recycling process for preparing taurine through aminolysis of sodium hydroxyethanesulfonate. In the process, solid waste sodium sulfate and activated carbon produced in the process of aminolysis of sodium hydroxyethanesulfonate to prepare taurine products are provided. Comprehensive utilization of slag to prepare water glass products and sodium bisulfite for recycling, liquid waste ammonia-containing wastewater and acid-containing wastewater generated in the production process of sodium bisulfite are neutralized and used for water glass production, water glass production cooling The disorganized gas generated in the melting process is introduced into the ammonolysis system to prepare the ammonia absorption liquid or the hydroxylation reaction process through the induced draft fan, thus solving the three wastes pollution problem in the production process of taurine and realizing zero discharge in the process. Fundamentally realized the recycling of the whole process.

Description

technical field [0001] The invention relates to a recycling process for preparing taurine through aminolysis of sodium hydroxyethanesulfonate, in particular to a complete process for preparing taurine through aminolysis of sodium hydroxyethanesulfonate for full recycling of waste. Background technique [0002] The chemical name of taurine is: aminoethanesulfonic acid, which is a sulfur-containing amino acid with various physiological activities. It can be used to prevent and treat colds, fever, neuralgia, tonsil inflammation, rheumatoid arthritis, cholecystitis, congestive heart failure, high blood pressure, drug poisoning, retinitis caused by lack of taurine, hypercholesterolemia, etc. Taurine is beneficial to the growth and development of fetuses and infants, especially the differentiation and development of nerve cells and the enhancement of the body's immunity. Add appropriate amount of taurine in milk and milk powder, its nutritional value is close to that of breast mi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C303/02C07C309/14C01B33/32C01D5/14
CPCC01B33/32C01D5/14C07C303/02C07C303/32C07C309/14C07C309/08Y02P20/129
Inventor 吴江胡利民
Owner 吴江
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