发明名称 |
PROCESS FOR THE PRODUCTION OF DIALKYL CARBONATE AND ALKANEDIOL |
摘要 |
An alkylene carbonate and an alkanol are subjected to transesterification to yield a dialkyl carbonate and alkanediol in a process comprising (a) introducing the alkylene carbonate and an alkanol feedstock into a reaction zone to react in the presence of a transesterification catalyst to yield an alkanediol-rich stream and a stream comprising dialkyl carbonate and alkanol, which streams are separated; (b) passing the stream comprising dialkyl carbonate and alkanol to an extractive distillation zone in which an extractant is added to the stream; (c) obtaining from the extractive distillation zone an alkanol-rich vapor stream and a bottom stream containing the extractant and the dialkyl carbonate; (d) separating the bottom stream from step (c) in a second non-extractive distillation zone to yield a dialkyl carbonate-rich top stream and a extractant-rich bottom stream; and (e) at least partly recycling the extractant-rich bottom stream to the extractive distillation zone, wherein the extractant-rich bottom stream is used as heat source for the alkanol feedstock. |
申请公布号 |
EP1986989(A1) |
申请公布日期 |
2008.11.05 |
申请号 |
EP20070712247 |
申请日期 |
2007.02.20 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. |
发明人 |
VAN DER HEIDE, EVERT;NISBET, TIMOTHY MICHAEL;VAPORCIYAN, GARO GARBIS |
分类号 |
C07C68/06;C07C29/128;C07C31/20;C07C68/08;C07C69/96 |
主分类号 |
C07C68/06 |
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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