发明授权
- 专利标题: Process for recovering a lower alcohol from a catechol-lower alcohol reaction product solution
- 专利标题(中): 从高级酒精反应产物溶液中回收低级酒精的方法
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申请号: US724934申请日: 1991-07-02
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公开(公告)号: US5105029A公开(公告)日: 1992-04-14
- 发明人: Kohei Ninomiya , Kanji Nakagawa , Yoichi Nishida
- 申请人: Kohei Ninomiya , Kanji Nakagawa , Yoichi Nishida
- 申请人地址: JPX Ube
- 专利权人: Ube Industries, Inc.
- 当前专利权人: Ube Industries, Inc.
- 当前专利权人地址: JPX Ube
- 优先权: JPX2-174594 19900703
- 主分类号: B01D53/22
- IPC分类号: B01D53/22 ; B01D3/00 ; B01D61/36 ; C07C29/76 ; C07C31/02 ; C07C37/74 ; C07C39/08 ; C07C43/23 ; C07C69/78
摘要:
A lower alcohol, for example, ethyl alcohol, is recovered from a reaction mixture resulted from a reaction of catechol with a lower alcohol in such a manner that the reaction mixture is distilled and separated into a distilled light vapor fraction comprising non-reacted lower alcohol and water and a residual fraction comprising a reaction product and non-reacted catechol; the distilled light vapor fraction is further distilled and separated into a distilled vapor fraction comprising the lower alcohol in an increased concentration and a residual water fraction; the distilled vapor fraction is fed to a gas-separating membrane module which allows water vapor to selectively permeate therethrough, and separated into a non-permeated fraction which comprises the lower alcohol in a high concentration, which is left in the feed side of the membrane, and a permeated fraction which comprises water in a high concentration, which is returned from the delivery side of the membrane to the further distilling step, and the non-permeated fraction is cooled and recovered.
公开/授权文献
- US5700053A Cushioning and protection apparatus for a chair armrest 公开/授权日:1997-12-23