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专利名称：Process for the production of crystalline
adduct of bisphenol A and phenol andapparatus therefor
发明人：Nobuo Moriya,Keiji Shimoda,Kouji
Sakashita,Hiroaki Nishijima,NobuhiroOnda,Takeshi Kouzaki
申请号：US07/967373申请日：19921028公开号：US05368827A公开日：19941129
摘要：High purity, crystalline adduct of bisphenol A and phenol is produced multi-stage crystallization of a phenolic slurry of bisphenol A with a crystal separation andwashing step being interposed between each of the two stages. Each of the
crystallization stage includes a series of crystallization towers operated at decreasingtemperatures. The crystallization of the slurry is performed by continuously discharginga portion of the slurry from each of the crystallization towers, introducing the dischargedslurry into one or more coolers and then recycling the cooled slurry to the tower.Another portion of the slurry in each crystallization slurry is continuously discharged,heated for dissolving fine crystals of the adduct and then recycled to the crystallizationtower so that large crystals are grown in each of the crystallization steps. An apparatushaving a plurality of coolers and suitable for effecting the above crystallization is alsodisclosed.
申请人：CHIYODA CORPORATION
代理机构：Armstrong, Westerman, Hattori, McLeland & Naughton
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