发明授权
US4686046A Process for separating cyclic oligomeric dihydric phenol carbonate from
aromatic polycarbonate
失效
从芳香族聚碳酸酯中分离环状低聚二元酚碳酸酯的方法
- 专利标题： Process for separating cyclic oligomeric dihydric phenol carbonate from aromatic polycarbonate
- 专利标题（中）： 从芳香族聚碳酸酯中分离环状低聚二元酚碳酸酯的方法
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申请号： US812448申请日： 1985-12-23
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公开(公告)号： US4686046A公开(公告)日： 1987-08-11
- 发明人: Robert A. Pyles , Patrick J. Mulvey
- 申请人： Robert A. Pyles , Patrick J. Mulvey
- 申请人地址： IN Mt. Vernon
- 专利权人： General Electric Company
- 当前专利权人： General Electric Company
- 当前专利权人地址： IN Mt. Vernon
- 主分类号： C08G64/40
- IPC分类号： C08G64/40 ; B01D13/00
摘要：
A process for separating cyclic oligomeric dihydric phenol carbonate from aromatic polycarbonate which comprises contacting a solution comprising a major amount of aromatic polycarbonate and a minor amount of cyclic oligomer with a semi-permeable membrane, and recovering a second solution which has passed through the said membrane, said second solution enriched in cyclic oligomer.
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