<p>A process for the production of 2,2-bis(4-hydroxyphenyl)propane (BPA) is disclosed. The process that entails reacting acetone with phenol in the presence of cross-linked sulfonated polystyrene resins is characterised in that BPA is separated from the reaction solution downstream of the reaction unit by means of a multi-stage vacuum distillation and a subsequent single- or multi-stage layer crystallisation. The by-product stream with accumulated by-products is returned downstream of the reaction unit.</p>
申请公布号
EP1237834(B1)
申请公布日期
2004.01.14
申请号
EP20000974481
申请日期
2000.10.30
申请人
BAYER AKTIENGESELLSCHAFT
发明人
HEYDENREICH, FRIEDER;PREIN, MICHAEL;BOEDIGER, MICHAEL;NEUMANN, RAINER;FENNHOFF, GERHARD;VAES, JOHAN