A method for the manufacture of bisphenols comprises introducing a combined feed stream comprising a feed stream and a recycle stream into a reactor system comprising at least one reactor containing a catalytic proportion of an acid catalyst and wherein the combined feed stream comprises a carbonyl compound and a stoichiometric excess of phenol; removing from the reactor system a reactor effluent; splitting the reactor effluent into a crystallization feed stream and an effluent recycle stream; extracting from said crystallization feed stream a bisphenol adduct, remainder comprising a mother liquor stream; dehydrating said mother liquor stream and said effluent recycle stream in a dehydrator wherein excess water and carbonyl compound are removed; and recycling the dehydrated mother liquor and the dehydrated effluent recycle stream back to the combined feed stream to effect improved production of p,p-bisphenol, along with increased reactor selectivity and reduced promoter quantities.
一种制造双
酚的方法,包括将一种混合进料流引入至少包含一个含有酸性催化剂的反应器系统中的反应器中,所述混合进料流包括一个进料流和一个回收流,其中所述混合进料流包括一个羰基化合物和过量的
苯酚;从反应器系统中移除反应器流出物;将反应器流出物分裂成结晶进料流和回收流;从所述结晶进料流中提取双
酚加合物,其余部分包括母液流;在脱
水器中脱
水所述母液流和所述回收流,其中去除了过量的
水和羰基化合物;将脱
水后的母液和脱
水后的回收流回收到混合进料流中,以实现改进的p,p-双
酚生产,同时增加了反应器选择性并减少了
促进剂用量。