US4378308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poison-resistant hydrodesulfurization catalyst
Assignee: Mobil Oil AS
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Filing: 1980-11-26
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Granted: 1983-03-29
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Expires: 2000-11-26
Abstract
Abstract Metal poisoning of hydrodesulfurization catalysts is reduced by coating the catalyst surface with a hydrated clay mineral, hydrated alumina, hydrated silica, or mixtures thereof. The catalyst and process in which it is used are particularly useful for the desulfurization of residual oils to produce low-sulfur, fuel oil products.
Inventors
- 👤 Philip J. Angevine
- 👤 Edward J. Rosinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:23
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J33/00; B01J37/00; B01J37/02; B01J37/024; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; B01J37/0215
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
49 words
An improved hydrodesulfurization catalyst comprising particulate refractory porous inorganic oxide carrier material and a hydrogenation component, the improvement which comprises a diffusion limiting coating formed from a material selected from the group consisting of hydrated clays, hydrated silica, hydrated alumina and mixtures thereof on the catalyst particle exterior surfaces.
Claim 2
Dependent Claim
49 words
An improved hydrodesulfurization catalyst comprising particulate refractory porous inorganic oxide carrier material and a hydrogenation component, the improvement which comprises a diffusion limiting coating formed from a material selected from the group consisting of hydrated clays, hydrated silica, hydrated alumina and mixtures thereof on the catalyst particle exterior surfaces.
Claim 3
Dependent Claim
15 words
The catalyst of claim 1 wherein said coating is formed from a hydrated Montmorrillonite clay.
Claim 4
Dependent Claim
10 words
The catalyst of claim 2 wherein said clay is bentonite.
Claim 5
Dependent Claim
10 words
The catalyst of claim 2 wherein said clay is kaoliniteis.
Claim 6
Dependent Claim
14 words
The catalyst of claim 1 wherein said coating is formed from a hydrated alumina.
Claim 7
Dependent Claim
14 words
The catalyst of claim 1 wherein said coating is formed from a hydrated alumina.
Claim 8
Dependent Claim
20 words
The catalyst of claim 1 wherein said coating is from about 0.1 to 10 weight percent of the total catalyst.
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) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |