Hydrocarbon conversion processes using improved transition metal

Details Hydrocarbon conversion processes using improved transition metal Hydrocarbon conversion processes using improved transition metal

1981-12-18

1983-12-06

Davis, Curtis R.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208110, 208111, 208119, C10G 1104, C10G 1116

Patent

active

044192223

ABSTRACT:
Hydrocarbons are cracked by contacting, in a cracking zone and at elevated temperature, a hydrocarbon feed with an acid catalyst comprising at least a catalytic metal oxide component wherein said metal is selected from the group consisting essentially of (a) tungsten, niobium and mixtures thereof and (b) mixtures of (a) with tantalum, hafnium, chromium, titanium, zirconium and mixtures thereof, and wherein said catalytic metal oxide component is supported on a silica-containing inorganic refractory metal oxide support the silica content of which is less than 50 wt. % of the total support, said catalyst being steamed prior to use at a temperature at least 600.degree. C. In a preferred embodiment, the support will comprise a mixture of silica and the .gamma.-alumina wherein the silica content is less than 25 wt. % thereof. Further, one may employ steam in the cracking zone.

REFERENCES:
patent: 2726234 (1955-12-01), Field et al.
patent: 2817626 (1957-12-01), Mabry et al.
patent: 2849383 (1958-08-01), Hirschler et al.
patent: 3108063 (1963-10-01), Chin et al.
patent: 4233139 (1980-11-01), Grenoble et al.
patent: 4244811 (1981-01-01), Grenoble et al.
patent: 4269737 (1981-05-01), Grenoble et al.
Shankland and Schmitkons "Determination of Activity and Selectivity of Cracking Catalyst" Proc. API 27 (III) 1947, pp. 57-77.

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