Patent US3276332A successfully refreshed from Google Patents.
EP0307239A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Modified zeolite catalysts and use thereof in the preparation and transformation of hydrocarbons
Assignee: Zeofuels Research Pty Ltd
•
Filing: 1988-09-09
•
Granted: —
•
Expires: 2008-09-09
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
- 👤 Graham John Hutchings
- 👤 Themistoclis 3 Graduate Lodge Themistocleous
- 👤 Richard George 14 3Rd Avenue Copperthwaite
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 19:07
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: 20
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
26 words
A method according to claim1 or claim 2 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
Independent Claim
27 words
A method according to any one of claims 1 to 4 wherein the treatment time is from longer than 24 hours up to and including 72 hours.
Claim 7
Independent Claim
20 words
A method according to any one of claims 1 to 5 wherein the treatment temperature is from 40°C to 80°C.
Claim 8
Independent Claim
22 words
A method according to any one of claims 1 to 6 wherein after the acid treatment step the modified clinoptilolite is calcined.
Claim 9
Dependent Claim
29 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.
Claim 10
Dependent Claim
24 words
A modified clinoptilolite produced by the method of any one of claims 1 to 8 starting from a natural clinoptilolite from Zululand, South Africa.
Claim 11
Dependent Claim
32 words
A modified clinoptilolite produced by the method of any one of claims 1 to 8 for use in a process for the conversion of methanol or dimethyl ether to hydrocarbon reaction products.
Claim 12
Independent Claim
60 words
A method for the regeneration of a deactivated modified clinoptilolite used in a process for the preparation of or transformation of hydrocarbons, the method including the step of heating the deactivated modified clinoptilolite at a suitable regeneration temperature and for a suitable regeneration time in the presence of nitrous oxide or a mixture of nitrous oxide and a second oxidant.
Claim 13
Independent Claim
60 words
A method for the regeneration of a deactivated modified clinoptilolite used in a process for the preparation of or transformation of hydrocarbons, the method including the step of heating the deactivated modified clinoptilolite at a suitable regeneration temperature and for a suitable regeneration time in the presence of nitrous oxide or a mixture of nitrous oxide and a second oxidant.
Claim 14
Dependent Claim
15 words
A method according to claim 11 wherein the regeneration temperature is from 450°C to 550°C.
Claim 15
Dependent Claim
12 words
A method according to claim 12 wherein the regeneration temperature is 500°C.
Claim 16
Independent Claim
20 words
A method according to any one of claims 11 to 13 wherein the regeneration time is 2 hours or more.
Claim 17
Independent Claim
21 words
A method according to any one of claims 11 to 14 wherein the second oxidant is selected from oxygen and air.
Claim 18
Dependent Claim
14 words
A modified clinoptilolite for use in a process for the cracking of hydrocarbon products.
Claim 19
Dependent Claim
14 words
A modified clinoptilolite for use in a process for the cracking of hydrocarbon products.
Claim 20
Dependent Claim
26 words
A modified clinoptilolite produced by the method of any one of claims 1 to 8 for use in a process for the cracking of hydrocarbon products.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.