Synthesis of beta-mercaptoethanol
Abstract
Abstract ETHYLENE OXIDE AND HYDROGEN SULFIDE ARE REACTED IN LIQUID PHASE TO PRODUCE MONOTHIOGLYCOL HSCH2CH2OH (2-MERCAPTOETHANOL). LIQUID PHASE RETENTION OF PRODUCT CATALYZES THE REACTION. THE LIQUID PHASE WITH A LARGE EXCESS OF H2S PERMITS GOOD TEMPERATURE CONTROL. SUFFICIENT LARGE EXCESS OF THE H2S OVER THE ETHYLENE OXIDE IS USED TO CONTROL THE TEMPERATURE OF THE EXOTHERMIC REACTION BY VAPORIZING THE LIQUID EXCESS H2S. HIGH YIELDS OF HIGH PURITY PRODUCT OF THE ORDER OF SUBSTANTIALLY IN THE RANGE OF 9O PLUS PERCENT, E.G. 95 PLUS PERCENT, IS REALIZED. THE MOLECULAR RATIO OF H2S TO THE OXIDE IS BROADLY 5-1K, AND MORE PREFERABLY IN THE RANGE 7-13. LOW TEMPERATURES OF THE ORDER OF ABOUT 125-3OO*F., PREFERABLY OF THE ORDER OF ABOUT 13O-26O*F. ARE POSSIBLE TO BE EMPLOYED UNDER CONDITIONS OF OPERATION. PREFERABLY, A CATALYST SUCH AS AN ACTIVATED ALUMINA CATALYST IS USED. PURITIES OF 99.2 WEIGHT PERCENT HAVE BEEN OBTAINED.
Inventors
- 👤 Harold W Tompkins
Bibliographic Details
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