发明授权
- 专利标题: Separation of azeotropes in poly(vinyl alcohol) process
- 专利标题(中): 聚(乙烯醇)工艺中共沸物的分离
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申请号: US764412申请日: 1991-09-23
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公开(公告)号: US5292804A公开(公告)日: 1994-03-08
- 发明人: Michael S. Chen
- 申请人: Michael S. Chen
- 申请人地址: PA Allentown
- 专利权人: Air Products and Chemicals, Inc.
- 当前专利权人: Air Products and Chemicals, Inc.
- 当前专利权人地址: PA Allentown
- 主分类号: C08F8/12
- IPC分类号: C08F8/12 ; C08F116/06
摘要:
In a process for preparing poly(vinyl alcohol), an improved method for separating the methanol/acetate azeotropes that result from said process. The azeotropes are separated by selective adsorption of methanol on an adsorbent followed by regeneration of the adsorbent with hot methanol vapor.
公开/授权文献
- US5727752A Reel for transporting elongate articles 公开/授权日:1998-03-17
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