公开(公告)号：US06545187B1

公开(公告)日：2003-04-08

申请号：US09682560

申请日：2001-09-19

申请人： Gaylord Michael Kissinger ,  Fang Christine Chen ,  James Cristopher Blubaugh ,  Darlene Hope Nance ,  Edward Brittain Stokes ,  Juan Rodriguez Ordonez ,  Jose M. Quintana

发明人： Gaylord Michael Kissinger ,  Fang Christine Chen ,  James Cristopher Blubaugh ,  Darlene Hope Nance ,  Edward Brittain Stokes ,  Juan Rodriguez Ordonez ,  Jose M. Quintana

IPC分类号： C07C3768

CPC分类号： C07C37/74 ,  B01J2219/00006 ,  C08G64/24 ,  C08G64/307 ,  C07C39/04 ,  C07C39/16

摘要： Low-particulate dihydric aromatic compounds such as bisphenol-A that can be used in the synthesis of low-particulate polycarbonates are prepared by introducing into a desorber column containing a non-aggregate packing material an adduct of bisphenol and phenol and optionally a stripping gas. The column is maintained at an operating temperature that is sufficiently high and an operating pressure that is sufficiently low such that the adduct is distilled. The stream of phenol and the stripping gas is recovered from the top of the column. A second stream containing bisphenol that is substantially free of added particulate matter is recovered from the bottom of the column. This purified stream of bisphenol-A can further be used in a method of producing optical-grade polycarbonate.

摘要翻译： 可以用于合成低粒度聚碳酸酯的低分子量的二元芳族化合物如双酚A通过将含有非骨料包装材料的解吸塔导入双酚和苯酚的加合物以及任选的汽提气体来制备。 将塔保持在足够高的操作温度和足够低的操作压力，使得加合物被蒸馏。 从塔的顶部回收苯和汽提气流。 含有基本上不含添加的颗粒物质的双酚的第二物流从塔的底部回收。 这种纯化的双酚A流可以进一步用于生产光学级聚碳酸酯的方法中。