Olefin metathesis

Details Olefin metathesis Olefin metathesis

1995-06-06

1997-12-16

Griffin, Walter D.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By alkyl transfer, e.g., disproportionation, etc.

585644, 585324, C07C 600

Patent

active

056987609

ABSTRACT:
The present invention is a process for the production of a mixed C4 olefinic stream comprising primarily isobutene and butene-1, and propylene, said process comprising subjecting a mixed olefin feedstock comprising C5 olefins and ethylene to metathesis in the presence of a catalyst at a temperature in the range from about -20.degree. C. to 200.degree. C. and subjecting the resulting metathesis product to fractionation to recover the mixed C4 stream and propylene resulting therefrom. The production of MTBE or tertiary butyl alcohol or iso-butene sulphate from this C4 stream gives rise to substantially pure butene-1 as a by-product. This method therefore obviates the need separate butene-1 from butene-2 and conventional C4 saturated hydrocarbons as would be the case if a conventional MTBE raffinate had to be processed.

REFERENCES:
patent: 3696163 (1972-10-01), Banks
patent: 3767565 (1973-10-01), Banks

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