Method for para selective alkylation employing silicalite...

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

C - Chemistry, Metallurgy

07

C

260/685

C07C 15/02 (2006.01) C07C 2/66 (2006.01)

Patent

CA 1198743

METHOD FOR PARA SELECTIVE ALKYLATION EMPLOYING SILICALITE CATALYSTS 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.

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