Patent US3873470A successfully refreshed from Google Patents.
US3873470A
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US
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Method of manufacturing a hydrodesulfurization catalyst
Assignee: Universal Oil Products Co
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Filing: 1973-05-07
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Granted: 1975-03-25
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Expires: 1993-05-07
Abstract
Abstract An improved hydrodesulfurization catalyst characterized by the method of manufacture. The improvement is attributed to certain novel oxidizing procedures. Residual fuel oils are desulfurized in contact with the catalyst which comprises a Group VIB and Group VIII metal component preferably on an alumina support.
Inventors
- 👤 John E Conway
- 👤 Robin J Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:03
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/70; B01J23/76; B01J23/84; B01J23/85; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
104 words
A METHOD OF CATALYST PREPARATION WHICH COMPRISES IMPREGNATING A PERFORMED REFRACTORY INORGANIC OXIDE CARRIER MATERIAL WITH AN ADMIXTURE OF THERMALLY DECOMPOSABLE SALT OR ACID CONTAINING A METAL OF GROUP VIB AND A THERMALLY DECOMPOSABLE SALT OR ACID CONTAINING A METAL OF GROUP VIII, INITIALLY HEATING THE IMPREGNATING CARRIER MATERIAL TO WITHIN LESS THAN ABOUT 100*F. OF THE DECOMPOSITION TEMPERATURE OF SAID MEATL COMPUND IN AN ATMOSPHERE COMPRISING AT LEAST ABOUT 20% STEAM, AND THEREAFTER SUBSTITUTING SUBSTANTIALLY ALL OF SAID STEAM WITH AIR AND CALCINING THE IMPREGNATED CARRIER MATERIAL AT A TEMPERATURE OF FROM ABOUT 800* TO ABOUT 1,200*F. IN A SUBSTANTIALLY DRY OXIDIZING ATMOSPHERE.
Claim 2
Independent Claim
104 words
A METHOD OF CATALYST PREPARATION WHICH COMPRISES IMPREGNATING A PERFORMED REFRACTORY INORGANIC OXIDE CARRIER MATERIAL WITH AN ADMIXTURE OF THERMALLY DECOMPOSABLE SALT OR ACID CONTAINING A METAL OF GROUP VIB AND A THERMALLY DECOMPOSABLE SALT OR ACID CONTAINING A METAL OF GROUP VIII, INITIALLY HEATING THE IMPREGNATING CARRIER MATERIAL TO WITHIN LESS THAN ABOUT 100*F. OF THE DECOMPOSITION TEMPERATURE OF SAID MEATL COMPUND IN AN ATMOSPHERE COMPRISING AT LEAST ABOUT 20% STEAM, AND THEREAFTER SUBSTITUTING SUBSTANTIALLY ALL OF SAID STEAM WITH AIR AND CALCINING THE IMPREGNATED CARRIER MATERIAL AT A TEMPERATURE OF FROM ABOUT 800* TO ABOUT 1,200*F. IN A SUBSTANTIALLY DRY OXIDIZING ATMOSPHERE.
Claim 3
Dependent Claim
61 words
The method of claim 1 further characterized in that said preformed refractory inorganic oxide carrier material is alumina having a surface area of from about 140 to about 270 square meters per gram, an average pore volume of from about 0.3 to about 0.7 cubic centimeters per gram and an average pore diameter of from about 60 to about 120 Angstroms.
Claim 4
Dependent Claim
24 words
The method of claim 1 further characterized in that said Group VIB compound is ammonium molybdate and said Group VII compound is cobalt nitrate.
Claim 5
Dependent Claim
36 words
The method of claim 3 further characterized in that said impregnated carrier material is initially heated in the atmosphere comprising at least about 20% steam to a temperature of from about 500* to about 700* F.
Claim 6
Dependent Claim
33 words
The method of claim 1 further characterized in that said impregnated carrier material is heated to within about 100* F. of said decomposition temperature in an atmosphere comprising at least about 50% steam.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |