Selective production of para-xylene

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

1978-01-10

1981-02-10

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

C07C 268

Patent

active

042503450

ABSTRACT:
Process for the selective production of para-xylene by methylation of toluene in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, said zeolite having a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12, which catalyst has undergone prior modification by the addition thereto of phosphorus oxide and magnesium oxide, each in an amount of at least about 0.25 percent by weight.

REFERENCES:
patent: 3965208 (1976-06-01), Butter et al.
patent: 4086287 (1978-04-01), Kaeding et al.

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