Process for preparing C.sub.4 --C.sub.6 --alkenes having an inte

Details Process for preparing C.sub.4 --C.sub.6 --alkenes having an inte Process for preparing C.sub.4 --C.sub.6 --alkenes having an inte

1998-08-21

1999-10-19

Griffin, Walter D.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By double-bond-shift isomerization

585665, 585666, 585667, 585668, 585669, 585670, C07C 523

Patent

active

059692057

ABSTRACT:
C.sub.4 -C.sub.6 -alkenes having an internal double bond can be produced by hydroisomerization of C.sub.4 -C.sub.6 -alkenes having a terminal double bond in the presence of H.sub.2 on a catalyst having a content of a noble metal of group VIII of the Periodic Table of the Elements (Mendeleev), if C.sub.4 -C.sub.6 -alkenes having a terminal double bond are fed into a hydroisomerization reactor after preheating, as such or in a mixture with other hydrocarbons, and the reaction product is divided into a work-up stream and a recycle stream. The recycle stream is recycled to the inlet of the hydroisomerization reactor and is used there as feed together with the C.sub.4 -C.sub.6 -alkenes having a terminal double bond or with the hydrocarbon stream comprising the C.sub.4 -C.sub.6 -alkenes having a terminal double bond and with the H.sub.2.

REFERENCES:
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patent: 4132745 (1979-01-01), Amigues et al.
patent: 4392002 (1983-07-01), Cosyns et al.
patent: 4435609 (1984-03-01), Gschwendtner
patent: 4849576 (1989-07-01), Nowack et al.
patent: 5008466 (1991-04-01), Schleppinghoff et al.
patent: 5177281 (1993-01-01), Haag et al.

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