专利名称：Countercurrent multi-stage water
crystallization for aromatic compounds
发明人：Robbins, Lanny A.,Gammill, Ben B.申请号：EP89109779.2申请日：19890530公开号：EP0400171B1公开日：19950614
摘要：A process for the purification of an aromatic compound, e.g.,
isopropylidenediphenol, comprising using a multi-stage countercurrent process whereinthe crystals are melted by the addition of heat and water prior to each crystallizationstep and wherein one crystallization is accomplished at a pre-selected low temperature.
申请人：DOW CHEMICAL CO
地址：US
国籍：US
代理机构：Sternagel, Hans-Günther, Dr.
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