发明授权
- 专利标题: Manufacture of bisphenol-A
- 专利标题(中): 双酚A的制造
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申请号: US712929申请日: 1996-09-13
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公开(公告)号: US5786522A公开(公告)日: 1998-07-28
- 发明人: Michael J. Cipullo
- 申请人: Michael J. Cipullo
- 申请人地址: MA Pittsfield
- 专利权人: General Electric Company
- 当前专利权人: General Electric Company
- 当前专利权人地址: MA Pittsfield
- 主分类号: C07C37/20
- IPC分类号: C07C37/20 ; C07B61/00 ; C07C37/74 ; C07C37/84 ; C07C37/86 ; C07C39/16
摘要:
An integrated process for the preparation and recovery of BPA in pure form utilizes a series of steps to crystallize pure BPA of improved color stability and recycle separated impurities to improve overall yields. The principal impurity recycled to the process is o,p-BPA which functions as a color stabilizer in the product and in polycarbonate resins prepared from the BPA.
公开/授权文献
- US5111227A Zoom camera 公开/授权日:1992-05-05
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