Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1983-11-14
1985-01-22
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502314, 502325, 502527, B01J 2324, B01J 2374, B01J 3502
Patent
active
044953070
ABSTRACT:
Petroleum-derived feedstocks are treated at elevated temperatures and pressures in the presence of hydrogen and in contact with a bed of porous catalytic particles. In accordance with the invention, each of the catalytic particles is specially shaped as a cylinder of polylobate cross-section having bluntly rounded, concave, interlobular interstices and in conformity with a selected combination of values of three defining parameters. The particle shape is further characterized as being substantially straight-sided and as having a geometric surface-to-volume ratio in the range of about 40 to about 95 in .sup.2 /in.sup.3. When the catalyst particle cross-section is selected to be circumscribed by a rectangle, the shorter side of the rectangle is about 70% as long as the longer side of the rectangle for all preferred combinations of values of the defining radial parameters. Further, when the entire catalyst particle is circumscribed by a right circular cylinder of the same length as the particle, the particle itself is in contact with the cylinder along three longitudinal elements and occupies about 55% of the volume of the cylinder.
REFERENCES:
patent: 2408164 (1946-09-01), Foster
patent: 3764565 (1973-10-01), Jacobs et al.
patent: 3990964 (1976-11-01), Gustafson
patent: 4076888 (1978-02-01), Perugini et al.
patent: 4328130 (1982-05-01), Kyan
patent: 4394303 (1983-07-01), Gibson
Katalco Corporation
Shine W. J.
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