Method for preparing taurine and co-producing bicarbonate

Abstract

The invention discloses a method for preparing taurine and co-producing bicarbonate. The method comprises the step of leading carbon dioxide gas or adding a carbon dioxide water solution to an amino ethyl sulfonate water solution of alkali metal or ammonium to regulate a pH value so as to obtain the taurine and the bicarbonate. The method can replace an existing taurine preparation method of using sulfuric acid or sulfur dioxide to regulate the pH value, meanwhile can treat boiler exhaust gas, turns the carbon dioxide in the exhaust gas into wealth, co-produces the bicarbonate and is a safe, environmentally-friendly and energy-saving method for producing the taurine and co-producing the bicarbonate.

Description

technical field [0001] The invention belongs to the field of organic chemical synthesis, in particular, the invention relates to a new method for preparing taurine and co-producing bicarbonate. Background technique [0002] The chemical name of taurine is 2-aminoethanesulfonic acid, and its structural formula is NH 2 CH 2 CH 2 SO 3 H. As a sulfur-containing amino acid, taurine is an important nutrient for humans and animals. It has important physiological functions, such as promoting the development of brain cells, improving immunity, relieving fatigue, and regulating nerve conduction. Taurine also has important pharmacological effects, such as anti-inflammatory, antipyretic, analgesic and antiviral effects. Taurine can also be used in the fields of medicine, health care, food, detergent, fluorescent whitening agent, pH buffering agent, etc. It can also be used as a biochemical reagent and an intermediate in other organic synthesis. [0003] There are generally two met...

AI Technical Summary

Problems solved by technology

The raw material cost of the ethylene oxide method is lower than that of the ethanolamine method. At present, the domestic industrialization has reached a certain scale, but in the existing large-scale production process, sulfuric acid is used to adjust the pH value, which is easy to corrode the equipment and pipelines, thereby giving the crude taurine A large amount of impurities are added, which adds difficulties to the post-processing of taurine

Moreover, a large amount of by-product sulfate needs to be packaged, storage facilities need to be built, and people are needed to manage it, which increases the production cost of taurine

[0005] Also in the prior art, sulfur dioxide is used instead of sulfuric acid to adjust the pH value in the production of taurine. The source of sulfur dioxide generally needs to build another device for producing sulfur dioxide or buy it from a sulfuric acid plant, and sulfur dioxide has a strong unpleasant effect. Pungent smell, great impact on people and operating environment

[0006] In summary, the preparation method for synthesizing taurine in the prior art has the following disadvantages: 1. high-risk chemical raw materials such as liquid caustic soda and sulfuric acid are not only easy to corrode pipelines and equipment, but also easily cause safety accidents when people operate, Cause greater economic loss; ②A large amount of sodium sulfate solid waste is generated, and part of the taurine will be taken away with long-term accumulation, resulting in material loss. At the same time, sodium sulfate will always exist in the mother liquor. Under these conditions, it is very easy to block the cooler, heater, synthesis tower and high-pressure pipeline, resulting in the failure of normal production. At the same time, a large amount of sulfate solid waste increases labor intensity and is not easy to handle.

③ When sulfur dioxide is used instead of sulfuric acid to adjust the pH value in the production of taurine, it is generally necessary to build another device for producing sulfur dioxide or purchase it from a sulfuric acid factory, and sulfur dioxide has a strong unpleasant pungent smell, which is harmful to people and operations. environmental impact

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