发明公开
- 专利标题： VERFAHREN ZUR HERSTELLUNG VON SULFONIERTEN AROMATISCHEN POLYMEREN UND VERWENDUNG DER VERFAHRENSPRODUKTE ZUR HERSTELLUNG VON MEMBRANEN
- 专利标题（英）： Method for producing sulfonated aromatic polymers and use of the process products for producing membranes
- 专利标题（中）： 用于生产磺化芳族聚合物
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申请号： EP00981353.6申请日： 2000-12-08
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公开(公告)号： EP1246862A1公开(公告)日： 2002-10-09
- 发明人: CUI, Wei , SOCZKA-GUTH, Thomas , FRANK, Georg
- 申请人： Celanese Ventures GmbH
- 申请人地址： 65926 Frankfurt am Main DE
- 专利权人： Celanese Ventures GmbH
- 当前专利权人： Celanese Ventures GmbH
- 当前专利权人地址： 65926 Frankfurt am Main DE
- 优先权： DE19959289 19991209
- 国际公布： WO01042336 20010614
- 主分类号： C08G65/48
- IPC分类号： C08G65/48 ; C08G75/23 ; C08J5/22
摘要：
The invention relates to a method for sulfonating aromatic polymers in a gentle manner. The inventive method comprises the following steps: a) dissolving the aromatic polymer in a substantially water-free acid selected from the group consisting of concentrated sulfuric acid, chlorosulfuric acid or oleum, b) adding an organic solvent that is inert under the reaction conditions, c) adding an anhydride of a carboxylic acid, d) adding a sulfonating agent, and e) carrying out the sulfonation at a temperature below 25 °C and for a period sufficient to obtain the desired degree of sulfonation. The homogeneous process products obtained can be preferably used in the production of membranes, for example for fuel cell applications.
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