申请人:Ogata Eiji
公开号:US20050272956A1
公开(公告)日:2005-12-08
The present invention provides a process for producing 4,4′-dihydroxydiphenylsulfone of very high purity. In particular, the present invention provides a process for producing 4,4′-dihydroxydiphenylsulfone of high purity comprising the steps of subjecting phenol in combination with a sulfonating agent or phenolsulfonic acid to a dehydration reaction in the presence of an aromatic nonpolar solvent while suspending the resulting dihydroxydiphenylsulfone therein, mixing the reaction suspension with a polar solvent to at least partially dissolve the dihydroxydiphenylsulfone, and precipitating 4,4′-dihydroxydiphenylsulfone.
本发明提供了一种生产高纯度4,4'-二羟基二苯基砜的方法。具体而言,本发明提供了一种生产高纯度4,4'-二羟基二苯基砜的方法,包括将苯酚与磺化剂或苯磺酸组合进行脱水反应,在芳香族非极性溶剂存在下悬浮所得的二羟基二苯基砜,将反应悬浮液与极性溶剂混合以至少部分溶解二羟基二苯基砜,并沉淀4,4'-二羟基二苯基砜。