Hydrocarbon conversion process with a composite zeolite

Details Hydrocarbon conversion process with a composite zeolite Hydrocarbon conversion process with a composite zeolite

1983-11-21

1984-11-13

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Aromatic compound synthesis

By isomerization

208111, 208120, 208135, 585467, 585475, 585486, C07C 522

Patent

active

044827741

ABSTRACT:
Hydrocarbon conversion processes which use catalyst compositions comprising a core of silica with an overlying modified-silica zeolite, preferably containing aluminium, gallium or boron, show improved catalytic activity. The composites are prepared by introducing preformed silica particles, preferably with a crystallite size greater than 0.1.mu., into a reaction mixture comprising a silicon source, a source of the modifying element, and preferably an organic template such as a tetraalkylammonium compound to form the modified-silica zeolite with a constraint index of from 1 to 12. The weight ratio of the silica core to SiO.sub.2 in the reaction mixture is preferably 1:1 to 10:1.

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Abstract of S. Africa 756,744, 756,745.

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