发明名称 |
Butadiene purification with simultaneous prefractionation and vinylacetylene rejection |
摘要 |
A C4-hydrocarbon feedstream containing butenes, butadiene, and vinylacetylene is subjected to a first extractive distillation with a selective solvent to remove butenes and a first portion of vinylacetylene as the extract; by the extraction with a minor quantity of methylethyl ketone in the selective solvent in this step, it has been found that a major portion of the vinylacetylene can be rejected, together with the butenes in the rich extract and that simultaneously the quantity of butadiene extracted could be considerably reduced; in a second extractive distillation the butadiene-rich raffinate of the first extractive distillation is further purified by extractive distillation using a mixture of sulfolane and methylethyl ketone as the solvent; after solvent stripping, the butadiene stream is finally purified in a fractionation step, wherein further vinylacetylene is removed.
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申请公布号 |
US4090923(A) |
申请公布日期 |
1978.05.23 |
申请号 |
US19770785157 |
申请日期 |
1977.04.06 |
申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
HASKELL, DONALD M.;CARTER, CECIL O. |
分类号 |
C07C7/00;C07C7/08;(IPC1-7):B01D3/40 |
主分类号 |
C07C7/00 |
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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