发明名称 |
PROCESS FOR THE PREPARATION OF VERY ACIDIC CATION EXCHANGERS |
摘要 |
<p>The invention relates to a process for the preparation of mechanically and osmotically stable, high-capacity strongly acidic cation exchangers having a particle size of >=0.1 mm by sulphonation of gel-like or porous bead polymers with sulphuric acid without the use of inert chlorine-containing swelling agents and/or of comonomers based on acrylonitrile. According to the invention, such strongly acidic cation exchangers can be prepared by sulphonation of gel-like and porous bead polymers, prepared by copolymerization of styrene and divinylbenzene having a crosslinker content of up to 65% by weight of divinylbenzene with and without inert composition, with 80-96% strength sulphuric acid at temperatures of 125-180° C. and a reaction time of up to 20 h. According to the novel process, strongly acidic cation exchangers can be prepared without the use of the inert chlorine-containing environmentally harmful swelling agent 1,2-dichloroethane, with quality features and material characteristics identical or similar to products produced by the conventional processes.</p> |
申请公布号 |
EP0868444(B1) |
申请公布日期 |
1999.09.22 |
申请号 |
EP19960944623 |
申请日期 |
1996.12.20 |
申请人 |
IAB IONENAUSTAUSCHER GMBH BITTERFELD |
发明人 |
BACHMANN, REINHARD;FEISTEL, LOTHAR;SEIDEL, RUEDIGER;SIEKIERA, KARL-HEINZ |
分类号 |
B01J39/20;C08F8/36;C08F12/08;(IPC1-7):C08F8/36 |
主分类号 |
B01J39/20 |
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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