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： US09815583申请日： 2001-03-23
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公开(公告)号： US06630568B1公开(公告)日： 2003-10-07
- 发明人: Norman Enoch Johnson , Raul Eduardo Ayala , Thomas Joseph Fyve , Amy Rene Freshour , David Winfield Woodruff , Peter David Phelps , Ganesh Kailasam
- 申请人： Norman Enoch Johnson , Raul Eduardo Ayala , Thomas Joseph Fyve , Amy Rene Freshour , David Winfield Woodruff , Peter David Phelps , Ganesh Kailasam
- 主分类号： G08F616
- IPC分类号： G08F616
摘要：
Aromatic polyethers are prepared by displacement polymerization reaction in the presence of a water-immiscible solvent with density ratio to water in a range of between about 0.9:1 and about 1.1:1 measured at a temperature in a range of between about 20° C. and about 25° C. The polyethers are purified by processes comprising aqueous extraction, or filtration, or a combination thereof.
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