US4487843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic activity of aluminosilicate zeolites
Assignee: BP PLC
•
Filing: 1984-02-13
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Granted: 1984-12-11
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Expires: 2004-02-13
Abstract
Abstract The present invention relates to a method of improving catalytic activity of a zeolite by first steam treating the zeolite and then loading the zeolite so treated with a Group IIIb metal, especially gallium. It has been found that steam treatment prior to gallium loading gives a catalyst which has a higher conversion and selectivity of hydrocarbon feeds to aromatics than otherwise.
Inventors
- 👤 Clive D. Telford
- 👤 Dennis Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:39
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/061
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A process for activating an aluminosilicate loaded with a compound of a metal from Group IIIB of the Periodic Table said process comprising bringing into contact the unloaded zeolite with steam at an elevated temperature prior to loading thereof with a compound of a metal from Group IIIB of the Periodic Table.
Claim 2
Dependent Claim
52 words
A process for activating an aluminosilicate loaded with a compound of a metal from Group IIIB of the Periodic Table said process comprising bringing into contact the unloaded zeolite with steam at an elevated temperature prior to loading thereof with a compound of a metal from Group IIIB of the Periodic Table.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein the aluminosilicate has a silica to alumina ratio greater than 5:1.
Claim 4
Dependent Claim
21 words
A process according to claims 1 or 2 wherein the Group IIIB metal is selected from aluminium, gallium, indium and thallium.
Claim 5
Dependent Claim
21 words
A process according to any one of the preceeding claims wherein the compound of the Group IIIB metal is gallium oxide.
Claim 6
Dependent Claim
35 words
A process according to claim 1 or 2 wherein the steaming step is carried out on a zeolite in which substantially all of the exchangeable metal ions have been exchanged with hydrogen or ammonium ions.
Claim 7
Dependent Claim
29 words
A process according to claim 1 or 2 wherein the steam treatment of the zeolite is carried out using steam as such or a carrier gas stream comprising steam.
Claim 8
Dependent Claim
23 words
A process according to claim 1 or 2 wherein the steam treatment is carried out at a pressure between 0.01 to 1.0 MPa.
Claim 9
Dependent Claim
23 words
A process according to claim 1 or 2 wherein the steam treatment is carried out at a temperature from 300° to 750° C.
Claim 10
Dependent Claim
25 words
A process according to claim 1 or 2 wherein the steam treatment is carried out for a duration of between 5 minutes and 200 hours.
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |