Method for para selective alkylation employing silicalite cataly

Details Method for para selective alkylation employing silicalite cataly Method for para selective alkylation employing silicalite cataly

1982-02-22

1984-12-25

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By condensation of entire molecules or entire hydrocarbyl...

C07C 268

Patent

active

044905700

ABSTRACT:
A process for the selective alkylation of a monoalkyl benzene in which the alkyl substituent is either methyl or ethyl, to yield a dialkylbenzene product in which the para isomer of the disubstituted product is present in a concentration greater than in a thermodynamic equilibrium is provided. The method essentially comprises passing the monoalkyl benzene and an alkylating agent capable of methylation or ethylation through a reaction zone containing a crystalline silica polymorph silicalite catalyst. Water, in the form of steam, can be co-fed as an option.

REFERENCES:
patent: 4104319 (1978-08-01), Kaeding
patent: 4238318 (1980-12-01), Kouwenhoven et al.
patent: 4283306 (1981-08-01), Herkes
Olson et al., Journal of Catalysis, 61, 390-396 (1980).

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