专利名称：Process for the purification of bisphenols
and preparation of polycarbonatestherefrom
发明人：Kimura, Takato,Omori, Satoru,Sato,
Ryozo,Shimoda, Tomoaki
申请号：EP98310177.5申请日：19981211公开号：EP0926118A1公开日：19990630
专利附图：
摘要：A phenol and a ketone are reacted to form bisphenol, and the liquid bisphenol
obtained or a mixed solution of said solution and a phenol is filtered through a calcinedmetal filter to obtain bisphenol which makes it possible to efficiently obtain bisphenolwhich either does not contain fine particulate impurities or contains such impurities onlyin minute amounts, and a method for manufacturing polycarbonate using bisphenolobtained bythis method. The filtration grade of the calcined metal filter should be 1.0 µmor less. After filtering, the calcined metal filter can be backwashed or chemically washedand then reused. The bisphenol should preferably be bisphenol A.
申请人：GENERAL ELECTRIC COMPANY
地址：1 River Road Schenectady, NY 12345 US
国籍：US
代理机构：Szary, Anne Catherine, Dr.
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