发明公开
EP0992483A1 Process for purifying a process stream
审中-公开
Verfahren zum Reinigen eines Prozessstromes
- 专利标题: Process for purifying a process stream
- 专利标题(中): Verfahren zum Reinigen eines Prozessstromes
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申请号: EP99307482.2申请日: 1999-09-22
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公开(公告)号: EP0992483A1公开(公告)日: 2000-04-12
- 发明人: Bristow, Timothy Crispin , Clarke, Robert William , Carr, Michael Peter , Kitchen, Simon James
- 申请人: BP Chemicals Limited
- 申请人地址: Britannic House, 1 Finsbury Circus London EC2M 7BA GB
- 专利权人: BP Chemicals Limited
- 当前专利权人: BP Chemicals Limited
- 当前专利权人地址: Britannic House, 1 Finsbury Circus London EC2M 7BA GB
- 代理机构: Perkins, Nicholas David
- 优先权: GB9821970 19981008
- 主分类号: C07C67/54
- IPC分类号: C07C67/54 ; C07C67/05
摘要:
In a process for removing ethyl acetate from a process stream comprising vinyl acetate, acetic acid, water and an ethyl acetate impurity, by the steps of: (a) introducing the process stream to a distillation column, (b) distilling the process stream to obtain a vinyl acetate-containing fraction at an upper end of the distillation column and an acetic acid-containing fraction at a lower end of said distillation column, and (c) withdrawing, a side stream comprising the ethyl acetate from an intermediate region of the distillation column, it has been found that by withdrawing the side stream as a vapour, the concentration of ethyl acetate obtainable from the distillation column is higher than the concentration of ethyl acetate obtainable by withdrawing the side stream as a liquid and is greater than 10 % by weight of the side stream.
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