| 摘要 |
Highly pure 1-butene and premium gasoline are obtained by (a) subjecting a C4 olefinic cut to a polymerization-disproportionation to partly convert the isobutene thereof to a gasoline which, in turn, by partial disproportionation, yields a jet fuel base and butenes, (b) fractionating the effluent from step (a) to a mixture ( alpha ) of gasoline and jet fuel base and to a fraction ( beta ) containing isobutane, n-butane, butenes, a small amount of isobutene and a minor amount of butadiene, (c) selectively polymerizing fraction ( beta ) to convert more than 90% of the isobutene thereof to gasoline, (d) fractionating the polymerized fraction ( beta ) to a gasoline cut ( gamma ) containing isobutene dimers and trimers and to a fraction ( delta ) containing isobutane, n-butane and butenes, (e) selectively hydrogenating the fraction ( delta ), (f) removing isobutane from the hydrogenated fraction ( delta ) and (g) fractionating the deisobutanized hydrogenated fraction ( delta ) to obtain a fraction containing at least 99% of 1-butene, the mixture ( alpha ) being admixed with the cut ( gamma ).
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