Selective production of para-xylene

Details Selective production of para-xylene Selective production of para-xylene

1975-01-06

1976-06-22

Gantz, Delbert E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

208DIG2, 260671R, 260671C, C07C 352

Patent

active

039652076

ABSTRACT:
Process for the selective production of paraxylene by methylation of toluene at a temperature between about 500.degree.C. and about 750.degree.C. and preferably between about 575.degree.C. and about 700.degree.C. in the presence of a catalyst comprising a crystalline aluminosilicate zeolite said zeolite having a silica to alumina mole ratio of at last about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12.

REFERENCES:
patent: 3277018 (1966-10-01), Plank et al.
patent: 3367884 (1968-02-01), Reid
patent: 3394075 (1968-07-01), Smith
patent: 3437587 (1969-04-01), Ellert et al.
patent: 3489675 (1970-01-01), Scott
patent: 3527824 (1970-09-01), Pollitzer
patent: 3575845 (1971-04-01), Miale
patent: 3751506 (1973-08-01), Burress

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