Patent US4396538A successfully refreshed from Google Patents.
US4396538A
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Hydrotreating/hydrocracking catalyst
Assignee: Mobil Oil AS
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Filing: 1980-09-16
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Granted: 1983-08-02
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Expires: 2000-09-16
Abstract
Abstract Conversion of hydrocarbons is conducted over low acidity zeolites such as the sodium form of zeolite ZSM-5 to yield products like those produced by hydrocracking but with substantially decreased proportion of light hydrocarbons having one to four carbon atoms. (Sulfiding of sodium zeolites activates such sodium zeolites for the present purpose.) The hydrocarbon conversion is conducted with mixed phase charge (Trickle mode) under hydrogen pressure or with liquid phase charge in a liquid-full reactor. A catalyst composition comprising a metallic hydrogenation catalyst on a refractory support and an alkali metal crystalline zeolite.
Inventors
- 👤 Nai Y. Chen
- 👤 David S. Shihabi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:29
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/19; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/405; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
58 words
A catalyst composition comprising a composite of discrete particles of (a) a metallic hydrogenation catalyst on a porous refractory support and (b) the alkali metal form of a crystalline zeolite characterized by a silica/alumina ratio above 12, a constraint index between about 1 and about 12 and an acid activity measured on the alpha scale less than 10.
Claim 2
Dependent Claim
58 words
A catalyst composition comprising a composite of discrete particles of (a) a metallic hydrogenation catalyst on a porous refractory support and (b) the alkali metal form of a crystalline zeolite characterized by a silica/alumina ratio above 12, a constraint index between about 1 and about 12 and an acid activity measured on the alpha scale less than 10.
Claim 3
Dependent Claim
14 words
A catalyst according to claim 1 wherein said zeolite is in the sodium form.
Claim 4
Dependent Claim
15 words
A catalyst according to claim 1 wherein said zeolite is the alkali-metal form of ZSM-5.
Claim 5
Dependent Claim
12 words
The catalyst composition of claim 3 wherein the catalyst composition is sulfided.
Claim 6
Dependent Claim
38 words
The catalyst composition of claim 1 wherein the catalyst composition comprises a composite of a major proportion of sodium zeolite with a minor proportion of a hydrogenation catalyst consisting essentially cobalt-molybdenum or nickel-tungsten on a porous alumina support.
Claim 7
Dependent Claim
22 words
The catalyst composition of claim 1 wherein said zeolite is in admixture with a metallic hydrogenation catalyst on a porous refractory support.
Claim 8
Dependent Claim
49 words
A catalyst composition comprising a composite of discrete particles of (a) a metallic hydrogenation catalyst on a porous refractory support and (b) the alkali metal form of a crystalline zeolite characterized by a silica/alumina ratio above 12 and an acid activity measured on the alpha scale less than 10.
Claim 9
Dependent Claim
49 words
A catalyst composition comprising a composite of discrete particles of (a) a metallic hydrogenation catalyst on a porous refractory support and (b) the alkali metal form of a crystalline zeolite characterized by a silica/alumina ratio above 12 and an acid activity measured on the alpha scale less than 10.
Claim 10
Dependent Claim
14 words
A catalyst according to claim 7 wherein said zeolite is in the sodium form.
Claim 11
Dependent Claim
16 words
A catalyst according to claim 7 wherein said zeolite is the alkali metal form of ZSM-5.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |