发明公开
EP1498414A1 PROCESS FOR PURIFICATION OF PROPYLENE OXIDE
审中-公开
VERFAHREN ZUR AUFREINIGUNG VON PROPYLENOXID
- 专利标题： PROCESS FOR PURIFICATION OF PROPYLENE OXIDE
- 专利标题（中）： VERFAHREN ZUR AUFREINIGUNG VON PROPYLENOXID
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申请号： EP03703248.9申请日： 2003-02-07
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公开(公告)号： EP1498414A1公开(公告)日： 2005-01-19
- 发明人: OKU, Noriaki , NAKAYAMA, Toshio , SHINOHARA, Koji
- 申请人： Sumitomo Chemical Company, Limited
- 申请人地址： 27-1, Shinkawa 2-chome, Chuo-ku Tokyo 104-8260 JP
- 专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人地址： 27-1, Shinkawa 2-chome, Chuo-ku Tokyo 104-8260 JP
- 代理机构： Lips, Hendrik Jan George, Ir.
- 优先权： JP2002038203 20020215
- 国际公布： WO2003068762 20030821
- 主分类号： C07D301/32
- IPC分类号： C07D301/32 ; C07D303/04
摘要：
A process for purifying propylene oxide, which comprises
using a liquid reaction mixture containing propylene oxide, and water, hydrocarbons and oxygen-containing organic compounds as impurities obtained by reacting cumene hydroperoxide with propylene, as a liquid raw material, and
separating and recovering propylene oxide from the liquid raw material, wherein the process comprises the following steps:
first step; a step of subjecting the liquid raw material to extractive distillation using a hydrocarbon of 7 to 10 carbons as an extractant to separate into the overhead stream containing most of water and the oxygen-containing impurities and the bottom stream containing propylene oxide, the hydrocarbons and the extractant,
second step; a step of subjecting the bottom stream to extractive distillation using a hydrocarbon of 7 to 10 carbons as an extractant to separate into the overhead containing propylene oxide and the bottom stream containing hydrocarbons and the extractant, and
third step; subjecting the extractant used in the first step and/or second step to distillation to purify the extractant,
wherein the bottom temperature of the distillation column or extractive distillation column in each of the steps is 130°C or lower.
using a liquid reaction mixture containing propylene oxide, and water, hydrocarbons and oxygen-containing organic compounds as impurities obtained by reacting cumene hydroperoxide with propylene, as a liquid raw material, and
separating and recovering propylene oxide from the liquid raw material, wherein the process comprises the following steps:
first step; a step of subjecting the liquid raw material to extractive distillation using a hydrocarbon of 7 to 10 carbons as an extractant to separate into the overhead stream containing most of water and the oxygen-containing impurities and the bottom stream containing propylene oxide, the hydrocarbons and the extractant,
second step; a step of subjecting the bottom stream to extractive distillation using a hydrocarbon of 7 to 10 carbons as an extractant to separate into the overhead containing propylene oxide and the bottom stream containing hydrocarbons and the extractant, and
third step; subjecting the extractant used in the first step and/or second step to distillation to purify the extractant,
wherein the bottom temperature of the distillation column or extractive distillation column in each of the steps is 130°C or lower.
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