Hydrocarbon conversion catalyst
AssigneeMobil Oil Corporation
InventorDavid S. Shihabi
Life of this patent
Estimating the term…
Abstract
In a process for converting a high boiling hydrocarbon charge fraction to liquid products of lower boiling range which comprises contacting said charge fraction with a crystalline zeolite characterized by a silica/alumina ratio greater than 12, a constraint index between about 1 and about 12 and an acid activity measured by the alpha scale less than 10, said contacting being conducted at 650.degree. to 850.degree. F., space velocity of 0.1 to 5.0 LHSV and a pressure not less than about 200 psi, the improvement which comprises utilizing, as catalyst, a zeolite of the above character that is prepared by steaming followed by base exchange to substantially eliminate its activity for cracking n-hexane.
Claims8
A catalyst composition comprising an inorganic matrix and from 10 to 90 wt.% of the alkali metal form of a steamed crystalline zeolite having a silica/alumina ratio above 12, a constraint index between about 1 and about 12, and an alpha value not less than about 5, said catalyst having substantially no activity for cracking n-hexane.
Dependencies are inferred from the claim text.