Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-07-29
1978-09-26
Gantz, Delbert E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260671C, C07C 352
Patent
active
041170245
ABSTRACT:
A catalytic process is provided for the ethylation of mono alkyl benzenes wherein the alkyl substituent contains 1 or 2 carbon atoms, i.e., toluene or ethylbenzene, by contacting the same with ethylene in the presence of hydrogen under conversion conditions including a temperature between about 350.degree. and about 500.degree. C, a pressure greater than atmospheric but less than 400 psig, employing a hydrogen to ethylene mole ratio in the approximate range of 0.5 to 10 and in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, which zeolite is characterized by an activity in terms of alpha value, of between about 2 and about 5000, a xylene sorption capacity greater than 1 gram/100 grams of zeolite and an ortho zylene sorption time for 30% of said capacity of greater than 10 minutes, said sorption capacity and sorption time being measured at 120.degree. C and a xylene pressure of 4.5 .+-. 0.8 mm. of mercury, said crystalline aluminosilicate zeolite further being characterized by a silica to alumina of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12, whereby aging of said catalyst during ethylation is substantially reduced over comparable reaction carried out in the absence of hydrogen.
REFERENCES:
patent: 3716597 (1973-02-01), Mitsche et al.
patent: 3962364 (1976-06-01), Young
patent: 4016218 (1977-04-01), Haag et al.
Barclay Raymond W.
Gantz Delbert E.
Huggett Charles A.
Mobil Oil Corporation
Spresser C. E.
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