1562-00-1Relevant articles and documents
Method for preparing taurine
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Paragraph 0046; 0047; 0048; 0050; 0052, (2019/04/06)
The invention provides a method for preparing taurine. The method comprises the following steps: carrying out an addition reaction on ethylene oxide and sodium hydrogen sulfite in the presence of a heterogeneous catalyst so as to obtain sodium hydroxyethyl sulfonate at high selectivity; carrying out an ammonolysis reaction on the synthesized sodium hydroxyethyl sulfonate under catalysis of a homogeneous catalyst; and neutralizing, crystallizing, separating and the like, thereby obtaining the finished taurine. Compared with the traditional production process, the process disclosed by the invention has the advantages that by-products in the addition reaction process can be obviously reduced, the temperature and pressure of the ammonolysis reaction are reduced, the reaction time is shortened,and industrial production is easily realized.
A PROCESS FOR PRODUCING TAURINE
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Paragraph 0028, (2018/08/09)
The present application provides a process for preducing taurine, comprising the steps as follows: (a) mixing isethionic acid with taurine salt solution until the system pH reaches a certain value in a range from 5.0 to 9.5; (b) separating liquid phase and solid phase of the system; wherein said solid phase is the crude product of taurine, and said liquid phase is isethionate solution; (c) reacting ammonia solution with said liquid phase obtained from step (b) to obtain taurine salt solution. It uses isethionic acid to adjust the pH of the taurine salt solution, avoiding the problem causing by using sulphate acid to adjust the pH in the traditional process. By the recycling use of the cations in taurine salts, a new raw material or reagent does not need to be added which is benefit to reducing the use of dangerous chemical materials, simplifying the production process greatly, improving the utilization rate of raw materials, increasing the yield of the product and decreasing production cost significantly.
Process for the production of taurine from ethanol
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Page/Page column 6, (2015/09/28)
The present invention discloses a process for the preparation of taurine from ethionic acid and ethanol by way of ethanol-derived ethionic acid by the ammonolysis of ethionic acid and by the ammonolysis of sodium isethionate and sodium vinyl sulfonate, key intermediates prepared from ethionic acid.