Method for producing 4-vinylcyclohexene, ethyl benzole and...

Details Method for producing 4-vinylcyclohexene, ethyl benzole and... Method for producing 4-vinylcyclohexene, ethyl benzole and...

2007-03-20

2007-03-20

Dang, Thuan Dinh (Department: 1764)

Chemistry of hydrocarbon compounds

Plural serial diverse syntheses

To produce unsaturate

C585S326000, C585S319000

Reexamination Certificate

active

10501876

ABSTRACT:
The invention relates to a process for preparing 4-vinylcyclohexene, which comprises the steps(A) providing an n-butane-containing feed gas stream,(B) feeding the n-butane-containing feed gas stream into at least one dehydrogenation zone and dehydrogenating n-butane to butadiene to give a product stream comprising butadiene, n-butane, possibly 1-butene and 2-butene and possibly water vapor and other secondary constituents,(C) feeding the product stream from dehydrogenation, if appropriate after separating off water vapor and secondary constituents, into a dimerization zone and catalytically dimerizing butadiene to give a product stream comprising 4-vinylcyclohexene, n-butane and possibly 1-butene, 2-butene and unreacted butadiene, and(D) separating off 4-vinylcyclohexene from the product stream from the dimerization and recirculating n-butane and possibly 1-butene, 2-butene and unreacted butadiene to the dehydrogenation zone.

REFERENCES:
patent: 2376985 (1945-05-01), Voorhees
patent: 2438041 (1948-03-01), Dutcher
patent: 3161670 (1964-12-01), Adams et al.
patent: 3502736 (1970-03-01), Sato et al.
patent: 4029715 (1977-06-01), Rieve et al.
patent: 5196621 (1993-03-01), Diesen et al.
patent: 5321180 (1994-06-01), Davis
patent: 94/01385 (1994-01-01), None

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