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Recycling process for preparing taurine through ammonolysis of sodium hydroxyethanesulfonate

A technology for aminolysis of sodium hydroxyethanesulfonate and sodium hydroxyethanesulfonate, which is applied in the field of aminolysis of sodium hydroxyethanesulfonate to prepare taurine recycling technology, can solve the problems of large environmental damage, and achieve the goal of solving the pollution of three wastes, The effect of reducing the consumption of liquid ammonia and increasing the income of by-products

Active Publication Date: 2018-12-18
吴江
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves upon existing methods that were developed earlier but still have issues such as environmental contamination or disposal costs associated therewith. It proposes new ways to reduce these problems while also making it more environmentally friendly than previous processes.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding an efficient way to make pure or enriched turars containing certain compounds called taurines while minimizing environmental impact on their manufacturing processes.

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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Abstract

The invention provides a recycling process for preparing taurine through ammonolysis of sodium hydroxyethanesulfonate. Through the process, solid wastes which are sodium sulfate and active carbon residues generated in the process of preparing taurine products through ammonolysis of sodium hydroxyethanesulfonate are comprehensively utilized and prepared into the solid wastes into sodium silicate products and recycled sodium hydrogen sulfite; acid-containing wastewater generated in a process of producing liquid wastes which are ammonia-containing wastewater and sodium hydrogen sulfite is neutralized and is subsequently used for producing sodium silicate; the unstructured gases generated in processes of producing, cooling and melting sodium silicate are introduced into an ammonolysis system through an induced draft fan for preparing ammonia absorption liquid or a hydroxylation reaction process. Through the process, the problem of pollution caused by three wastes in the production processof taurine is solved; zero emission of the process is achieved; the whole process is fundamentally recycled.

Description

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Claims

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Application Information

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Owner 吴江
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