Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1977-06-28
1979-01-09
Shine, W. J.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252469, 252477R, B01J 2104, B01J 2106, B01J 2384
Patent
active
041337778
ABSTRACT:
A catalyst having utility as a downstream catalyst in processes for hydrodesulfurization of asphaltene-containing petroleum oils, coal liquids, shale oils or oils from tar sands which employ both upstream and downstream catalysts in series. The downstream catalyst comprises supported Group VI and Group VIII metals together with a promoting amount of a Group IV-B metal. The particles of said promoted catalyst are elongated extrudates whose surface is provided with a plurality of alternating longitudinal grooves and protrusions. In processes using this catalyst, the upstream catalyst comprises Group VI and Group VIII metals without promotion with Group IV-B metal and the particles of the upstream catalyst may or may not have similar surface grooves. The adaptation of the grooved particle configuration to the promoted catalyst composition provided the early development of a plateau-like aging curve which was not achieved by the adaptation of the grooved shape to a non-promoted catalyst.
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patent: 3940330 (1976-02-01), Beuther et al.
patent: 3968027 (1976-07-01), Frayer et al.
patent: 3968029 (1976-07-01), Frayer et al.
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Frayer James A.
Lese Henri K.
McKinney Joel D.
Metzger Kirk J.
Paraskos John A.
Gulf Research & Development Company
Shine W. J.
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