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公开(公告)号:US5785823A
公开(公告)日:1998-07-28
申请号:US691402
申请日:1996-08-02
申请人: Kurt-Peter Meurer , Tony Van Osselaer , Werner Verhoeven , Johan Vaes , Ignace Hooftman , Willy Van Herck , Claus Wulff , Jurgen Hinz , Alfred Eitel , Kaspar Hallenberger
发明人: Kurt-Peter Meurer , Tony Van Osselaer , Werner Verhoeven , Johan Vaes , Ignace Hooftman , Willy Van Herck , Claus Wulff , Jurgen Hinz , Alfred Eitel , Kaspar Hallenberger
CPC分类号: C07C37/74 , C07C37/685
摘要: A process for preparing bisphenol A which has a purity of at least 99.95 wt. % of p,p-bisphenol A (BPA). Thermally stable and colour-stable BPA purified in accordance with the invention produces improved thermal and colour stability and improved optical transparency in polymers such as e.g. polycarbonates prepared therefrom.
摘要翻译: 一种制备双酚A的方法,其纯度至少为99.95wt。 %的p,p-双酚A(BPA)。 根据本发明纯化的热稳定和色稳定的BPA产生改善的热和颜色稳定性并改善聚合物中的光学透明度,例如聚合物。 由其制备的聚碳酸酯。
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2.
公开(公告)号:US5696295A
公开(公告)日:1997-12-09
申请号:US418583
申请日:1995-04-06
申请人: Claus Wulff , Kaspar Hallenberger , Heinrich Steude , Kurt-Peter Meurer , Tony van Osselaer , Jurgen Hinz , Frank Quaeyhaegens , Johan Vaes , Ignace Hooftman
发明人: Claus Wulff , Kaspar Hallenberger , Heinrich Steude , Kurt-Peter Meurer , Tony van Osselaer , Jurgen Hinz , Frank Quaeyhaegens , Johan Vaes , Ignace Hooftman
摘要: The invention relates to a method for the purification by distillation of p,p-bisphenol A from the melt. The p,p-bisphenol A melt thus obtained is highly heat-stable, stable in storage and colour-stable, is free from high-boiling components and no longer contains any surface-active or non-distillable metal, salt, acid or polymer components and no sulphur-containing components; o,p-BPA and phenol are removed and the low-boiling components are scarcely detectable.
摘要翻译: 本发明涉及通过蒸馏从熔体中蒸馏出p,p双酚A的方法。 由此获得的p,p双酚A熔体是高度稳定的,在储存和稳定的颜色下稳定,不含高沸点组分,不再含有任何表面活性或不可蒸馏的金属,盐,酸或聚合物 组分,不含硫成分; o,p-BPA和苯酚,并且几乎不检测到低沸点成分。
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