发明授权
- 专利标题： Process for purifying PPPBP
- 专利标题（中）： 纯化PPPBP的方法
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申请号： US11687943申请日： 2007-03-19
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公开(公告)号： US07884220B2公开(公告)日： 2011-02-08
- 发明人: Zhongqi Xu , Guohua Xiu , Tong Sun , Jingwu Yang
- 申请人： Zhongqi Xu , Guohua Xiu , Tong Sun , Jingwu Yang
- 申请人地址： US NY Schenectady
- 专利权人： General Electric Company
- 当前专利权人： General Electric Company
- 当前专利权人地址： US NY Schenectady
- 代理机构： Fay Sharpe LLP
- 代理商 Richard M. Klein
- 主分类号： C07D209/44
- IPC分类号： C07D209/44
摘要：
A method for decoloring 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine (“p,p-PPPBP”) is disclosed. The method comprises contacting a liquid solution containing p,p-PPPBP and the common impurities o,p-PPPBP and aminophenone with activated carbon fibers. The activated carbon fibers adsorb the impurities, resulting in a purified solution of p,p-PPPBP. The activated carbon fibers can then be regenerated, such as with a methanol solution having a highly basic pH.
公开/授权文献
- US20080234496A1 PROCESS FOR PURIFYING PPPBP 公开/授权日：2008-09-25
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