Alkylation of alkanes with mixtures of alkenes and alkyl halides

Details Alkylation of alkanes with mixtures of alkenes and alkyl halides Alkylation of alkanes with mixtures of alkenes and alkyl halides

1997-06-02

1999-02-02

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By condensation of a paraffin molecule with an olefin-acting...

585726, 585728, 585729, C07C 256

Patent

active

058667474

ABSTRACT:
Although alkenes commonly are used to alkylate alkanes using various solid acid catalysts, the process is severely hampered by short catalyst lifetimes attending substantial alkene oligomerization. This problem can be avoided by using an alkene-alkyl chloride mixture as the alkylating agent. Thus, alkylation of isobutane by a butyl chloride/butene mixture at a molar ratio of 1:3 in the presence of an AlCl.sub.3 -type Friedel-Crafts catalyst at 30.degree. C. maintains at least an 80% conversion of (alkene and alkyl chloride) for almost twice as long as is the case for a 1:19 molar ratio of butyl chloride/butene.

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patent: 3976714 (1976-08-01), Rodewald
patent: 4229611 (1980-10-01), Kramer
patent: 4579996 (1986-04-01), Freide et al.

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