发明授权
- 专利标题： Superabsorbent polymers and methods of making the same
- 专利标题（中）： 超吸收性聚合物及其制造方法
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申请号： US13461220申请日： 2012-05-01
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公开(公告)号： US08309668B2公开(公告)日： 2012-11-13
- 发明人: Torsten Balduf , Günther Bub , Jürgen Mosler , Andreas Sabbagh , Jürgen Kohn , Arndt Selbach
- 申请人： Torsten Balduf , Günther Bub , Jürgen Mosler , Andreas Sabbagh , Jürgen Kohn , Arndt Selbach
- 申请人地址： DE Krefeld
- 专利权人： Evonik Stockhausen GmbH
- 当前专利权人： Evonik Stockhausen GmbH
- 当前专利权人地址： DE Krefeld
- 代理机构： Smith Moore Leatherwood LLP
- 代理商 Philip P. McCann
- 优先权： DE102005039156 20050817
- 主分类号： C08F220/06
- IPC分类号： C08F220/06 ; C08L33/02
摘要：
The present invention relates to a process for producing a superabsorbent a polymer comprises (I) producing a pure (meth)acrylic acid comprising the steps of (a) synthesizing a crude (meth)acrylic acid phase; (b) distillatively working-up the crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase comprising (meth)acrylic acid dimers or (meth)acrylic acid oligomers or both; (c) splitting at least a part of the (meth)acrylic acid dimers or of the (meth)acrylic acid oligomers or both from the dimer phase to obtain a (meth)acrylic acid-comprising low boiling phase and a high boiling phase comprising less (meth)acrylic acid than the low boiling phase; (d) separating at least a part of the (meth)acrylic acid from the low boiling phase to obtain a pure (meth)acrylic acid, and a residue; (II) polymerizing a monomer phase comprising the pure (meth)acrylic acid to obtain a polymer phase; and (III) working-up the polymer phase to obtain the polymer.
公开/授权文献
- US20120226003A1 SUPERABSORBENT POLYMERS AND METHODS OF MAKING THE SAME 公开/授权日：2012-09-06
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