Selective hydrogenation of vinyltoluene

Details Selective hydrogenation of vinyltoluene Selective hydrogenation of vinyltoluene

1981-12-24

1983-04-05

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

With chemical reaction

Including step of adding catalyst or reacting material

252455Z, 423328, 585258, 585267, 585269, 585270, 585806, 585807, B01D 314, C07C 510, C07C 704, C07C 7163

Patent

active

043790275

ABSTRACT:
This invention provides a process for obtaining m-methylstyrene from a mixture with p-methylstyrene that comprises hydrogenating a mixture of p-methylstyrene and m-methylstyrene in the presence of a zeolite having a Constraint Index of about 1 to about 12, a silica to alumina mole ratio of at least about 12, and a dried crystal density of not less than about 1.6 grams per cubic centimeter, modified with at least one element of Group IA, IIA, IVB, or VB of the Periodic Chart of the Elements and a metal of Group VIII of the Periodic Chart of the Elements; thereby obtaining a mixture of m-methylstyrene and p-ethyltoluene, and removing p-ethyltoluene by distillation.

REFERENCES:
patent: 3684665 (1972-08-01), Abe et al.
patent: 3702886 (1972-11-01), Argauer et al.
patent: 3709979 (1973-01-01), Chu
patent: 3715408 (1973-02-01), Brown et al.
patent: 3943053 (1976-03-01), Kovach et al.
patent: 4046824 (1977-09-01), Ransley
patent: 4075254 (1978-02-01), Boodman et al.
patent: 4299686 (1981-11-01), Kuehl
patent: 4341600 (1982-07-01), Watson

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