发明名称 |
A PROCESS FOR THE EPOXIDATION OF AN OLEFIN WITH IMPROVED ENERGY BALANCE |
摘要 |
<p>The invention relates to a process for the epoxidation of an olefin comprising (a) reacting the olefin with hydrogen peroxide in the presence of methanol as solvent in at least two reaction stages to obtain a mixture (M-a) comprising olefin oxide, unreacted olefin, methanol and water, wherein between at least two reaction stages, olefin oxide is separated by distillation; (b) separating unreacted olefin from the mixture (M-a) by distillation to obtain a mixture (M-bi) comprising at least 80 wt.-% of olefin and a mixture (M-bii) comprising methanol, water and at least 7 wt.-% of olefin oxide; (c) separating olefin oxide from the mixture (M-bii) in at least one distillation stage to obtain a mixture (M-ci) comprising at least 99 wt.-% of oletin oxide and a mixture (M-cii) comprising water and at least 55 wt.-% of methanol; (d) separating methanol from the mixture (M-cii) in at least one distillation stage to obtain a mixture (M-di) comprising at least 85 wt.-% of methanol and up to 10 wt.-% of water, and a mixture (M-dii) comprising at least 90 wt.-% of water; wherein a vapor top stream (Td) obtained from at least one distillation column used in (d), said vapor top stream (Td) comprising at least 85 wt.-% methanol, is used to operate at least partially at least one vaporizer used in at least one distillation column used in at least one of stages (a), (b) and (c).</p> |
申请公布号 |
CA2595039(A1) |
申请公布日期 |
2006.07.27 |
申请号 |
CA20062595039 |
申请日期 |
2006.01.09 |
申请人 |
THE DOW CHEMICAL COMPANY;BASF AKTIENGESELLSCHAFT |
发明人 |
SCHULTZ, HENNING;PATRASCU, RENATE;SCHULTZ, PETER;WEIDENBACH, MEINOLF;SCHULZ, MALTE;GOEBBEL, HANS-GEORG |
分类号 |
C07D301/12 |
主分类号 |
C07D301/12 |
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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