Title:
METHOD FOR CYCLICALLY PREPARING TAURINE FROM HYDROXYETHYL SULFONIC ACID ALKALI METAL SALT AND VINYL SULFONIC ACID ALKALI METAL SALT
Document Type and Number:
WIPO Patent Application WO/2015/158157
Kind Code:
A1
Abstract:
Disclosed is a method for cyclically preparing taurine from a hydroxyethyl sulfonic acid alkali metal salt and a vinyl sulfonic acid alkali metal salt. In the method, by-products of an ammonolysis reaction, i.e., disodium taurate and trisodium taurate, are continuously converted into sodium taurate, so as to achieve efficient production with an overall yield over 95%. Pure disodium taurate and trisodium taurate are prepared by using diethanolamine and triethanolamine as raw materials and separately subjecting them to an ammonolysis reaction to obtain a mixture of sodium taurate, disodium taurate and trisodium taurate.
Inventors:
HU SONGZHOU (CN)
Application Number:
PCT/CN2015/000232
Publication Date:
October 22, 2015
Filing Date:
April 03, 2015
Export Citation:
Assignee:
HU SONGZHOU (CN)
International Classes:
C07C303/02; C07C309/14
Foreign References:
| CN102285905A | 2011-12-21 | |||
| CN101508658A | 2009-08-19 | |||
| CN101486669B | 2012-02-22 | |||
| US1999614A | 1935-04-30 |
Other References:
See also references of EP 3133060A4
Attorney, Agent or Firm:
CHINA ELITES INTELLECTUAL PROPERTY LAW FIRM (CN)
北京神州华茂知识产权有限公司 (CN)
北京神州华茂知识产权有限公司 (CN)
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