US4392989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc-gallium zeolite
Assignee: Mobil Oil AS
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Filing: 1981-05-11
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Granted: 1983-07-12
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Expires: 2001-05-11
Abstract
Abstract The elution of zinc from zinc-impregnated zeolite catalysts is minimized by incorporating gallium into the catalyst composition. Optionally, palladium may also be included in the composition. The catalyst composition is used to effect the conversion of propane in hydrocarbon streams to aromatic hydrocarbons.
Inventors
- 👤 Yung F. Chu
- 👤 Arthur W. Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:26
CPC Classifications
C; C07; C07C; C07C2/00; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/405; B01J29/42; B01J29/44; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; B01J29/65; B01J29/70; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/65; C07C2529/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
51 words
A catalyst composition comprising by weight between about 0.1 and about 2 percent of gallium, between about 0.05 and about 8 percent of zinc, and a crystalline zeolite characterized by a constraint index within the approximate range of 1 to 12, and a silica to alumina ratio of at least 12.
Claim 2
Dependent Claim
51 words
A catalyst composition comprising by weight between about 0.1 and about 2 percent of gallium, between about 0.05 and about 8 percent of zinc, and a crystalline zeolite characterized by a constraint index within the approximate range of 1 to 12, and a silica to alumina ratio of at least 12.
Claim 3
Dependent Claim
28 words
The catalyst composition of claim 1 comprising by weight between about 0.01 and about 1 percent of gallium, and between about 0.99 and about 5 percent of zinc.
Claim 4
Dependent Claim
36 words
The catalyst composition of claim 1 wherein said catalyst is composited with a porous matrix material in a proportion of between about 1 and about 90 percent by weight of catalyst composition in the dry composite.
Claim 5
Dependent Claim
36 words
The catalyst composition of claim 1 wherein said catalyst is composited with a porous matrix material in a proportion of between about 1 and about 19 percent by weight of catalyst composition in the dry composite.
Claim 6
Dependent Claim
24 words
The catalyst composition of claim 1 wherein said zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38, and ZSM-48.
Claim 7
Dependent Claim
22 words
The catalyst composition of claim 1, wherein said catalyst further contains between about 0.05 and about 1 percent by weight of palladium.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |