Hydrocarbon conversion process employing a modified form of zeol

Details Hydrocarbon conversion process employing a modified form of zeol Hydrocarbon conversion process employing a modified form of zeol

1990-12-24

1993-05-04

Myers, Helane

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208134, 208135, 208137, 208138, 208213, 208254H, 585467, 585481, 585482, 585739, C10G 4702

Patent

active

052078922

ABSTRACT:
Novel catalyst compositions comprising a metal hydrogenation component and a modified form of zeolite Y are found to be highly effective in the hydrocarbon conversion processes carried out in the presence of added hydrogen and involving hydrogenation as an essential reaction mechanism. The modified form of zeolite Y is prepared from a starting zeolite Y which has been ammonium cation exchanged to lower the alkali metal content to less than 3.0 weight percent. The starting composition is then steamed at temperatures above about 550.degree. C. to reduce the unit cell dimension and then contacted with an aqueous ammonium ion solution having a pH below about 4 to increase the bulk Si/Al.sub.2 ratio to the range of about 6.5 to 20.

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