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US4133777A Expired / Lapsed US ⏱️ 0.0 years remaining

Hydrodesulfurization catalyst

Assignee: Gulf Research and Development Co
•
Filing: 1977-06-28
•
Granted: 1979-01-09
•
Expires: 1997-06-28
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Abstract

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.

Inventors

  • 👤 James A. Frayer
  • 👤 Henri K. Lese
  • 👤 Joel D. McKinney
  • 👤 Kirk J. Metzger
  • 👤 John A. Paraskos

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 19:36
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J35/00; B01J35/50; B01J35/55

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 91 words
A hydrodesulfurization catalyst comprising Group VI and Group VIII metals with a promoting amount of Group IV-B metal on a non-cracking support, said promoting amount being between 1 and 10 weight percent based on the total weight of the catalyst, the particles of said catalyst comprising elongated extrudates which show in cross-section at least one groove defining protrusions and an average concavity index between 1.01 and 1.35, the shortest distance between the depth of said at least one groove and the center in said cross-section being between 1/30 and 1/20 inch.
Claim 2
Dependent Claim 91 words
A hydrodesulfurization catalyst comprising Group VI and Group VIII metals with a promoting amount of Group IV-B metal on a non-cracking support, said promoting amount being between 1 and 10 weight percent based on the total weight of the catalyst, the particles of said catalyst comprising elongated extrudates which show in cross-section at least one groove defining protrusions and an average concavity index between 1.01 and 1.35, the shortest distance between the depth of said at least one groove and the center in said cross-section being between 1/30 and 1/20 inch.
Claim 3
Dependent Claim 17 words
The catalyst of claim 1 wherein the particles have a plurality of alternating longitudinal grooves and protrusions.
Claim 4
Dependent Claim 14 words
A catalyst of claim 1 wherein the particles contain 2 to 8 elongated grooves.
Claim 5
Dependent Claim 15 words
A catalyst of claim 1 wherein said average concavity index is between 1.05 and 1.25.
Claim 6
Dependent Claim 15 words
A catalyst of claim 1 wherein said average concavity index is between 1.10 and 1.20.
Claim 7
Dependent Claim 15 words
A catalyst of claim 1 wherein said shortest distance is between 1/40 and 1/110 inch.
Claim 8
Dependent Claim 15 words
A catalyst of claim 1 wherein said shortest distance is between 1/50 and 1/100 inch.
Claim 9
Dependent Claim 12 words
A catalyst of claim 1 wherein said Group IV-B metal is titanium.
Claim 10
Dependent Claim 11 words
A catalyst of claim 1 wherein said non-cracking support is alumina.
Claim 11
Dependent Claim 48 words
A hydrodesulfurization catalyst bed containing contiguous upper and lower catalyst layers, the lower catalyst layer comprising particles of the catalyst of claim 1 and the upper catalyst layer comprising particles of a supported Group VI and Group VIII metals catalyst without said promoting amount of Group IV-B metal.
Claim 12
Dependent Claim 60 words
The catalyst bed of claim 10 wherein the particles in said upper catalyst layer comprise elongated extrudates which show in cross-section at least one groove defining protrusions and an average concavity index between 1.01 and 1.35, the shortest distance between the depth of said at least one groove and the center in said cross-section being between 1/30 and 1/120 inch.
Claim 13
Dependent Claim 25 words
The catalyst bed of claim 10 wherein a greater amount of catalyst is contained in said upper catalyst layer than in said lower catalyst layer.

References Cited (Backward Citations)

US3674680A Cited
US3840473A Cited
US3990964A Cited
US3940330A Cited
US3968029A Cited
US3968027A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-01-08 1982-07-10 1983-01-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-01-08 1986-07-10 1987-01-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-01-08 1990-07-10 1991-01-09 $7700.00 Window Closed / Lapsed

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