Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1983-10-17
1985-04-09
Shine, W. J.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
4232135, 502332, 502333, 502334, 502527, B01J 2104, B01J 2310, B01J 2340, B01J 3504
Patent
active
045102619
ABSTRACT:
An extrudate catalyst suitable for auto emission control is made from a solid, transitional alumina. It has a partially hollow interior and one or more platinum group metals deposited on the extrudate. The cylindrical extrudate has internal reinforcing vanes or ribs extending from the inner wall to the center of the extrudate particle. This configuration permits the catalyst to have the large geometric surface area per reactor volume yet, because of the openings inside the extrudate, the catalyst particles do not exhibit a large pressure drop when packed in a deep bed. These catalysts provide greater hydrocarbon and carbon monoxide conversions than do similar size spherical particles and they have improved light-off characteristics.
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patent: 3907710 (1975-09-01), Lundsager
patent: 3932309 (1976-01-01), Graham et al.
patent: 3966644 (1976-06-01), Gustafson
patent: 4089941 (1978-05-01), Villemin
patent: 4233187 (1980-11-01), Atwood et al.
patent: 4369132 (1983-01-01), Kinoshita et al.
patent: 4391740 (1983-07-01), Gibson
patent: 4394303 (1983-07-01), Gibson
Knight Tower Packings published by Koch Engineering Company, Inc., Maurice A. Knight Division.
Hegedus Louis
Maselli James M.
Pereira Carmo J.
Cabic Edward J.
Shine W. J.
W. R. Grace & Co.
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