发明名称 |
Pervaporation process for separating alcohols from ethers. |
摘要 |
<p>The present invention is an improved process for separating alcohols from ethers and/or hydrocarbon raffinate in an etherification process. The excess alcohol reactant which forms azeotrope mixtures with the product ethers and C4-C7 raffinate, is removed by passing the liquid azeotrope mixture over a pervaporation membrane which effectively breaks the azeotrope and permeates the alcohol with high flux and high selectivity. In a typical etherification process, one or more pervaporation membrane units can be located ahead of the ether/raffinate distillation step, in conjunction with the distillation step with a liquid side draw, after the distillation step, or a combination of any of the above. The present invention also provides an improved process for separating alcohols from ethers and/or hydrocarbon raffinate in an ether decomposition process for the production of high purity iso-alkene products. In this embodiment, one or more pervaporation membranes are used to recover alcohols from the decomposition product stream.</p> |
申请公布号 |
EP0317918(A2) |
申请公布日期 |
1989.05.31 |
申请号 |
EP19880119252 |
申请日期 |
1988.11.18 |
申请人 |
AIR PRODUCTS AND CHEMICALS, INC. |
发明人 |
CHEM, MICHAEL SHI-KUAN;ENG, ROBERT MICHAEL;GLAZER, JEROME LEONARD;WENSLEY, CHARLES GLEN |
分类号 |
C07C7/04;B01D61/36;C07C1/00;C07C1/20;C07C11/00;C07C11/02;C07C41/00;C07C41/06;C07C41/34;C07C43/04;C07C67/00 |
主分类号 |
C07C7/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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