发明授权
- 专利标题： Method for purification of aromatic polyethers
- 专利标题（中）： 芳香族聚醚的纯化方法
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申请号： US10034866申请日： 2001-12-21
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公开(公告)号： US06790934B2公开(公告)日： 2004-09-14
- 发明人: Norman Enoch Johnson , Raul Eduardo Ayala , Thomas Joseph Fyvie , Amy Rene Freshour , David Winfield Woodruff , Peter David Phelps , Ganesh Kailasam , Paul Edward Howson , Elliott West Shanklin , Lioba Maria Kloppenburg , David Bruce Hall , Pradeep Jeevaji Nadkarni , Daniel Joseph Brunelle
- 申请人： Norman Enoch Johnson , Raul Eduardo Ayala , Thomas Joseph Fyvie , Amy Rene Freshour , David Winfield Woodruff , Peter David Phelps , Ganesh Kailasam , Paul Edward Howson , Elliott West Shanklin , Lioba Maria Kloppenburg , David Bruce Hall , Pradeep Jeevaji Nadkarni , Daniel Joseph Brunelle
- 主分类号： C08G606
- IPC分类号： C08G606
摘要：
Aromatic polyethers are prepared by displacement polymerization reaction in the presence of a water-immiscible solvent with boiling point at atmospheric pressure of greater than 110° C. and a density ratio to water of greater than 1.1:1 at 20-25° C. The polyethers are purified by processes comprising aqueous extraction, or filtration, or a combination thereof.
公开/授权文献
- US20020151675A1 Method for purification of aromatic polyethers 公开/授权日：2002-10-17
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