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METHOD FOR PREPARING 1,1,1-TRIS (4-HYDROXYPHENYL) ETHANE
METHOD FOR PREPARING 1,1,1-TRIS (4-HYDROXYPHENYL) ETHANE
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机译:制备1,1,1-三(4-羟基苯)乙烷的方法
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摘要
METHOD FOR PREPARING1,1,1 -TRIS(4-HYDROXYPHENYL)ETHANEABSTRACT1,1,1-Tris(4-hydroxyphenyl)ethane, a branching agentfor polycarbonates, is prepared by the reaction of phenol with2,4-pentanedione in the presence of sulfuric acid and at least onemercapto sulfonic acid such as 3-mercaptopropanesulfonic acid aspromoter. By employing specific proportions of the promoter andsulfuric acid, high product yields can be obtained in relatively shorttimes.
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