US4614834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrocyclization with nonacidic L zeolite
Assignee: Honeywell UOP LLC
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Filing: 1985-09-30
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Granted: 1986-09-30
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Expires: 2005-09-30
Abstract
Abstract A novel catalyst composite is disclosed as well as a novel method of preparing the composite and a novel use for the composite. The novel composite comprises a nonacidic zeolite, catalytically effective amounts of a Group VIII metal component, and a silica support matrix derived by a high pH gelation of an alkali metal silicate sol. This novel composition has particular utility as a dehydrocyclization catalyst for the conversion of paraffins to aromatic compounds.
Inventors
- 👤 Susan L. Lambert
- 👤 Randy J. Lawson
- 👤 Russell W. Johnson
- 👤 Jean-Pierre Gilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:22
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/60; B01J29/61; B01J29/62; C07; C07C; C07C5/00; C07C5/32; C07C5/373; C07C5/393; C07C5/41; C07C5/415; C07C5/417; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42; Y; Y02; Y02P; Y02P20/00; Y02P20/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
154 words
A dehydrocyclization process comprising contacting C 6 -C 10 aliphatic hydrocarbons at a pressure of from about 0 psig to about 600 psig, a temperature of from about 800° F. to about 1200° F., a liquid hourly space velocity of from about 0.1 hr -1 to about 10 hr -1 and a molar ratio of hydrogen to said hydrocarbons of from about 0.1 to about 10 with a catalyst composite comprising nonacidic L zeolite, a catalytically effective amount of Group VIII metal component, and a silica support matrix, said catalytic composite being produced by the method comprising admixing said nonacidic L zeolite with an alkali metal silicate sol, causing the zeolite-containing sol to gel while maintaining the pH of the sol while in contact with the zeolite at a value of at least 7, recovering the resulting catalytic composite, and incorporating a catalytically effective amount of a Group VIII metal in said catalytic composite.
Claim 2
Dependent Claim
154 words
A dehydrocyclization process comprising contacting C 6 -C 10 aliphatic hydrocarbons at a pressure of from about 0 psig to about 600 psig, a temperature of from about 800° F. to about 1200° F., a liquid hourly space velocity of from about 0.1 hr -1 to about 10 hr -1 and a molar ratio of hydrogen to said hydrocarbons of from about 0.1 to about 10 with a catalyst composite comprising nonacidic L zeolite, a catalytically effective amount of Group VIII metal component, and a silica support matrix, said catalytic composite being produced by the method comprising admixing said nonacidic L zeolite with an alkali metal silicate sol, causing the zeolite-containing sol to gel while maintaining the pH of the sol while in contact with the zeolite at a value of at least 7, recovering the resulting catalytic composite, and incorporating a catalytically effective amount of a Group VIII metal in said catalytic composite.
Claim 3
Dependent Claim
24 words
The process of claim 1 further characterized in that the support matrix is derived from a high pH gelation of a lithium silicate sol.
Claim 4
Dependent Claim
32 words
The process of claim 1 further characterized in that the catalytic composite comprises from about 25 to 75 wt. % nonacidic zeolite based on the weight of the zeolite and support matrix.
Claim 5
Dependent Claim
18 words
The process of claim 1 further characterized in that the Group VIII metal component comprises a platinum component.
Claim 6
Dependent Claim
41 words
The process of claim 1 further characterized in that the catalytic composite comprises from about 0.01 to about 5.0 wt. % of the Group VIII metal component based on the weight of the zeolite, support matrix, and Group VIII metal component.
References Cited (Backward Citations)
US3579598A
Cited
US3846337A
Cited
US3886094A
Cited
US3843741A
Cited
FR2360540A2
Cited
US4247726A
Cited
US4416806A
Cited
US4435283A
Cited
US4430200A
Cited
US4448891A
Cited
US4567312A
Cited
US4537866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-29 | 1990-03-31 | 1990-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-29 | 1994-03-31 | 1994-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-29 | 1998-03-31 | 1998-09-30 | $7700.00 | Window Closed / Lapsed |