US4983560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified zeolite catalysts
Assignee: Zeofuels Research Pty Ltd
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Filing: 1988-09-12
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Granted: 1991-01-08
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Expires: 2008-09-12
Abstract
Abstract There is disclosed a method for the modification of a natural clinoptilolite by acid treatment using a mineral acid at a suitable temperature and for a suitable period of time, followed by calcination, to produce a modified clinoptilolite which may be used as a catalyst in a reaction for the preparation of or transformation of hydrocarbons, e.g. the cracking of hydrocarbon products. There is also disclosed a method of regenerating the deactivated modified catalyst after use by treatment in the presence of nitrous oxide.
Inventors
- 👤 Richard G. Copperthwaite
- 👤 Themistoclis Themistocleous
- 👤 Graham J. Hutchings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:33
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A method for the modification of a natural clinoptilolite to produce a modified clinoptilolite for use in a reaction for the preparation of or transformation of hydrocarbons, the method including the step of treating the natural clinoptilolite with a suitable mineral acid at a concentration of greater than 1M for a treatment time of longer than 24 hours and at a suitable treatment temperature to produce the modified clinoptilolite.
Claim 2
Independent Claim
69 words
A method for the modification of a natural clinoptilolite to produce a modified clinoptilolite for use in a reaction for the preparation of or transformation of hydrocarbons, the method including the step of treating the natural clinoptilolite with a suitable mineral acid at a concentration of greater than 1M for a treatment time of longer than 24 hours and at a suitable treatment temperature to produce the modified clinoptilolite.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the suitable mineral acid is hydrochloric acid.
Claim 4
Dependent Claim
24 words
A method according to claim 1 wherein the suitable mineral acid has a concentration of from greater than 1M up to and including 2.5M.
Claim 5
Dependent Claim
15 words
A method according to claim 1 wherein the suitable mineral acid is 2M hydrochloric acid.
Claim 6
Dependent Claim
22 words
A method according to claim 1 wherein the treatment time is from longer than 24 hours up to and including 72 hours.
Claim 7
Dependent Claim
17 words
A method according to claim 1 wherein the treatment temperature is from 40° C. to 80° C.
Claim 8
Dependent Claim
17 words
A method according to claim 1 wherein after the acid treatment step the modified clinoptilolite is calcined.
Claim 9
Dependent Claim
31 words
A method according to claim 7 wherein the calcining is carried out at a calcining temperature of from 450° C. to 550° C. for a calcining time of from 3 hours.
References Cited (Backward Citations)
US3367884A
Cited
EP0142313A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |