US4654455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphorus containing alumina catalyst for the production of aromatics
Assignee: Honeywell UOP LLC
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Filing: 1986-06-09
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Granted: 1987-03-31
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Expires: 2006-06-09
Abstract
Abstract Superior tolerance to catalyst coking is obtained with a catalytic composite comprising a gallium component and a crystalline aluminosilicate incorporated with a phorphorus containing alumina. A five-fold reduction in the coke content of the spent catalyst of the instant invention is observed which is directly attributable to the phosphorus containing alumina. A novel method of preparing this catalyst is presented, along with a novel process for the dehydrocyclodimerization of C2-C5 aliphatic hydrocarbons.
Inventors
- 👤 Tai-Hsiang Chao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:54
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2724; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/44; B01J29/90; C07C2/00; C07C2/76; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42; B01J29/65; B01J29/70; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/08; C07C2527/00; C07C2527/14; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
43 words
A process for the dehydrocyclodimerization of hydrocarbons which comprises contacting a feed stream containing aliphatic hydrocarbons in the presence of a catalytic composition comprising phosphorus containing alumina, a gallium component, and crystalline aluminosilicate having a silica to alumina ratio of at least 12.
Claim 2
Dependent Claim
43 words
A process for the dehydrocyclodimerization of hydrocarbons which comprises contacting a feed stream containing aliphatic hydrocarbons in the presence of a catalytic composition comprising phosphorus containing alumina, a gallium component, and crystalline aluminosilicate having a silica to alumina ratio of at least 12.
Claim 3
Dependent Claim
18 words
The process of claim 1 wherein the aliphatic hydrocarbons have from 2 to 5 carbon atoms per molecule.
Claim 4
Dependent Claim
55 words
The process of claim 1 wherein the dehydrocyclodimerization conditions comprise a temperature in the range from about 350° to about 650° C., a pressure from about 1 to 20 atm, a liquid hourly space velocity of from about 0.2 to 5 liquid volumes of said aliphatic hydrocarbons per hour per volume of said catalyst composition.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein said feed stream contains a diluent selected, from the group consisting of CO, CO 2 , H 2 O or its precursors.
References Cited (Backward Citations)
US3386801A
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US4590323A
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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) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |