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公开(公告)号:EP0939100A1
公开(公告)日:1999-09-01
申请号:EP98306674.7
申请日:1998-08-20
CPC分类号: C08J11/04 , C08J11/10 , C08J2343/02 , Y02P20/143 , Y02W30/70 , Y02W30/702
摘要: In a method for recovering polymers in a substantially pure form from a solution containing the polymers, the solution is first treated with a reactant (e.g. an acid, a sequestrant or a mixture of both) to form the free polymers and salts of the reactant. Second, the solution is treated to remove the salts therefrom and in a final stage the polymer solution is concentrated and the polymers recovered.
The second treatment step may consist of membrane-filtration, ion-exchange or electrodialysis.摘要翻译: 在从含有聚合物的溶液中回收基本上纯的形式的聚合物的方法中,首先用反应物(例如酸,多价螯合剂或两者的混合物)处理溶液以形成游离聚合物和反应物的盐。 第二,处理溶液以除去其中的盐,并且在最终阶段中聚合物溶液被浓缩并回收聚合物。 第二处理步骤可以由膜过滤,离子交换或电渗析组成。