- 专利标题: PROCESS FOR THE EPOXIDATION OF PROPENE
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申请号: US15570167申请日: 2016-04-19
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公开(公告)号: US20180134676A1公开(公告)日: 2018-05-17
- 发明人: Robert JAHN , Wolfgang WÖLL , Bernd JAEGER , Matthias PASCALY
- 申请人: Robert JAHN , Wolfgang WÖLL , Bernd JAEGER , Matthias PASCALY
- 申请人地址: DE Essen DE Essen
- 专利权人: Evonik Degussa GmbH,THYSSENKRUPP INDUSTRIAL SOLUTIONS AG
- 当前专利权人: Evonik Degussa GmbH,THYSSENKRUPP INDUSTRIAL SOLUTIONS AG
- 当前专利权人地址: DE Essen DE Essen
- 优先权: EP15165410.0 20150428
- 国际申请: PCT/EP2016/058638 WO 20160419
- 主分类号: C07D301/12
- IPC分类号: C07D301/12 ; C07D301/36 ; C07D303/04 ; B01J29/89 ; B01D3/34 ; B01D3/42 ; B01D19/04
摘要:
In a process for the epoxidation of propene, comprising the steps: reacting propene with hydrogen peroxide in the presence of a titanium silicalite catalyst and a methanol solvent; separating non-reacted propene and propene oxide from the resulting reaction mixture to provide a solvent mixture comprising methanol and water in a combined amount of at least 90% by weight; and feeding this solvent mixture as a feed stream to a continuously operated methanol distillation column at a feed point in the middle section of said column to provide an overhead product comprising at least 90% by weight methanol and a bottoms product comprising at least 90% by weight water; the addition of a liquid defoamer, having a solubility in the feed stream of less than 10 mg/kg at 25° C. and a surface tension at the liquid air interface of less than 22 mN/m at 20° C., at or above the feed point in an amount exceeding the solubility of the liquid defoamer in the feed stream suppresses foam formation in the methanol distillation column.
公开/授权文献
- US10125108B2 Process for the epoxidation of propene 公开/授权日:2018-11-13