US4717398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective adsorption and recovery of organic gases using ion-exchanged faujasite
Assignee: BP Chemicals Ltd
•
Filing: 1986-04-01
•
Granted: 1988-01-05
•
Expires: 2006-04-01
Abstract
Abstract This invention relates to a process for selectively adsorbing and recovering an organic gas containing unsaturated linkages from a mixture of gases over a cuprous ion-exchanged zeolite of the faujasite type. The process is particularly suited for adsorbing gases such as carbon monoxide and ethylene over a zeolite having a silica to alumina molar ratio from 1.5 to 3.0.
Inventors
- 👤 Graeme K. Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:20
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/183; Y; Y02; Y02P; Y02P30/00; Y02P30/40; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
70 words
A pressure swing process for selectively absorbing and recovering an organic gas containing unsaturated linkages from a mixture of gases by passing the mixture over a zeolite ion-exchanged with cuprous ions characterized in that the zeolite has a faujasite type structure and has a silicon to aluminum atomic ratio from 1.2-3 and wherein the zeolite has been granulated after being copper ion-exchanged and prior to contact with the gaseous mixture.
Claim 2
Dependent Claim
70 words
A pressure swing process for selectively absorbing and recovering an organic gas containing unsaturated linkages from a mixture of gases by passing the mixture over a zeolite ion-exchanged with cuprous ions characterized in that the zeolite has a faujasite type structure and has a silicon to aluminum atomic ratio from 1.2-3 and wherein the zeolite has been granulated after being copper ion-exchanged and prior to contact with the gaseous mixture.
Claim 3
Dependent Claim
20 words
A process according to claim 1 wherein the gas containing unsaturated linkages is selected from carbon monoxide and an alkene.
Claim 4
Dependent Claim
11 words
A process according to claim 2 wherein the alkene is ethylene.
Claim 5
Dependent Claim
18 words
A process according to claim 1 wherein the zeolite has a silicon to aluminum atomic ratio from 2-3.
Claim 6
Dependent Claim
26 words
A process according to claim 1 wherein the selective adsorption is carried out by passing the gaseous mixture over the zeolite at ambient temperature and pressure.
Claim 7
Dependent Claim
42 words
A process according to claim 1 for adsorbing from a gaseous mixture an organic gas containing unsaturated linkages over a zeolite wherein the adsorbed organic gas is recovered and the cuprous ion-exchanged zeolite regenerated by applying a low vacuum at ambient temperature.
Claim 8
Dependent Claim
20 words
A pressure-swing process as defined in claim 1 wherein said granulated zeolite has a particle size greater than 1 mm.
Claim 9
Dependent Claim
17 words
The process of claim 1, wherein the mixture of gases essentially consists of carbon monoxide and nitrogen.
Claim 10
Dependent Claim
17 words
The process of claim 1, wherein the mixture of gases essentially consists of carbon monoxide and methane.
Claim 11
Dependent Claim
16 words
The process of claim 1, wherein the mixture of gases essentially consists of ethylene and methane.
Claim 12
Dependent Claim
16 words
The process of claim 1, wherein the mixture of gases essentially consists of ethylene and ethane.
Claim 13
Dependent Claim
16 words
The process of claim 1, wherein the mixture of gases essentially consists of propylene and propane.
Claim 14
Dependent Claim
111 words
A pressure swing process for selectively absorbing and recovering an organic gas containing unsaturated linkages from a mixture of gases by passing the mixture over a zeolite ion-exchanged with cuprous ions, characterised in that the zeolite has a faujasite type structure and has a silicon to aluminum atomic ratio from 1.2-3; and wherein the zeolite is prepared by the following series of steps: initially exchanging the zeolite by treatment with cupric ions, granulating the initially exchanged zeolite so that the granulated zeolite has a particle size greater than 1 mm, and reducing the granulated zeolite containing cupric ions to said cuprous ion exchanged zeolite, prior to contact with the gaseous mixture.
Claim 15
Dependent Claim
111 words
A pressure swing process for selectively absorbing and recovering an organic gas containing unsaturated linkages from a mixture of gases by passing the mixture over a zeolite ion-exchanged with cuprous ions, characterised in that the zeolite has a faujasite type structure and has a silicon to aluminum atomic ratio from 1.2-3; and wherein the zeolite is prepared by the following series of steps: initially exchanging the zeolite by treatment with cupric ions, granulating the initially exchanged zeolite so that the granulated zeolite has a particle size greater than 1 mm, and reducing the granulated zeolite containing cupric ions to said cuprous ion exchanged zeolite, prior to contact with the gaseous mixture.
Claim 16
Dependent Claim
19 words
The process according to claim 13, wherein the granulated zeolite has a particle size of 1 to 1.5 mm.
Claim 17
Dependent Claim
17 words
The process of claim 13, wherein the mixture of gases essentially consists of carbon monoxide and nitrogen.
Claim 18
Dependent Claim
17 words
The process of claim 13, wherein the mixture of gases essentially consists of carbon monoxide and methane.
Claim 19
Dependent Claim
16 words
The process of claim 13, wherein the mixture of gases essentially consists of ethylene and methane.
Claim 20
Dependent Claim
16 words
The process of claim 13, wherein the mixture of gases essentially consists of ethylene and ethane.
Claim 21
Dependent Claim
16 words
The process of claim 13, wherein the mixture of gases essentially consists of propylene and propane.
References Cited (Backward Citations)
CA555482A
Cited
US2254799A
Cited
US2988503A
Cited
US2978407A
Cited
US3476508A
Cited
GB1139405A
Cited
NL6702392A
Cited
US3346328A
Cited
US3497462A
Cited
US3720604A
Cited
US3649177A
Cited
US3649176A
Cited
BE767066A
Cited
FR2094476A5
Cited
US3789106A
Cited
US3718580A
Cited
US3755540A
Cited
US3793386A
Cited
US4019879A
Cited
US4034065A
Cited
US4331644A
Cited
US4297328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |