发明名称 |
Process for recovering dipropylene glycol tert-butyl ethers |
摘要 |
<p>A process for purifying dipropylene glycol tert-butyl ethers (DPTB) is disclosed. DPTB is made by reacting dipropylene glycol with isobutylene in the presence of an acidic catalyst and the product mixture includes di-tertiary butyl ether impurities derived from dipropylene glycol. The purification process comprises extractive distillation of the product mixture using a glycol extracting agent, preferably dipropylene glycol, which allows removal of di-tert-butyl ether impurities as an overhead product, and then distillation of the DPTB product to separate it from the glycol extracting agent. High-purity DPTB, substantially free of diethers and exceptionally useful as a solvent, is obtained from the process. The process for forming the DPTB and then purifying it is also described. <IMAGE></p> |
申请公布号 |
EP0669307(B1) |
申请公布日期 |
1997.12.03 |
申请号 |
EP19950300945 |
申请日期 |
1995.02.15 |
申请人 |
ARCO CHEMICAL TECHNOLOGY, L.P. |
发明人 |
CHANG, TE;HARRIS, STEPHEN H. |
分类号 |
C07C41/42;C07C43/04;(IPC1-7):C07C43/13 |
主分类号 |
C07C41/42 |
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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