- 专利标题: Production process of polyphenylene ether
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申请号: US09883277申请日: 2001-06-19
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公开(公告)号: US06586567B2公开(公告)日: 2003-07-01
- 发明人: Yuji Takeda , Akio Hasebe , Isamu Masumoto , Akira Mitsui
- 申请人: Yuji Takeda , Akio Hasebe , Isamu Masumoto , Akira Mitsui
- 优先权: JP2000-182500 20000619
- 主分类号: C08G6538
- IPC分类号: C08G6538
摘要:
A process for producing a polyphenylene ether, which comprises contacting, with an aqueous solution of a chelating agent, a polyphenylene ether solution and adding a water-soluble poor solvent for the polyphenylene ether to precipitate the polyphenylene ether; and recovering the thus precipitated polyphenylene ether. A mixture remaining after the recovery of the polyphenylene ether is brought into contact with water to extract the water-soluble poor solvent, and a water phase containing the thus extracted water-soluble poor solvent is recovered by separation. The water-soluble poor solvent is separated and removed from the water phase by distillation, and the whole or a part of the remaining water phase is recycled as water to be brought into contact with the mixture, the remaining water phase having a content of a high-boiling-point organic substance of 1 wt. % or less.
公开/授权文献
- US20020040126A1 Production process of polyphenylene ether 公开/授权日:2002-04-04