发明名称 |
Process for recovering fluoropolymers |
摘要 |
A process for recovering fluoropolymers, which comprises contacting an ion exchange membrane comprising a fluoropolymer having carboxylic acid groups (hereinafter referred to as a C-polymer) and a fluoropolymer having sulfonic acid groups (hereinafter referred to as a S-polymer) and having inorganic particles deposited on the surface, with a solvent which is a good solvent for the C-polymer and a good solvent for the S-polymer, to separate a solution having the C-polymer and the S-polymer dissolved therein, and the inorganic particles, then esterifying the C-polymer in the solution to form precipitate of an ester of the C-polymer, and fractionating and recovering the precipitate and a solution having the S-polymer dissolved therein by solid-liquid separation.
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申请公布号 |
US6515102(B2) |
申请公布日期 |
2003.02.04 |
申请号 |
US20020092630 |
申请日期 |
2002.03.08 |
申请人 |
ASAHI GLASS COMPANY, LIMITED;SEIMI CHEMICAL CO., LTD. |
发明人 |
KUMAI SEISAKU;FUKATSU YUTAKA;MIHARA HARUMI;TOKURA RYOTA |
分类号 |
C08J11/04;C08J11/08;(IPC1-7):C08F6/00 |
主分类号 |
C08J11/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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