Patent US4401572A successfully refreshed from Google Patents.
US4401572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective zeolite sorption of group V-B element hydrides and derivatives thereof
Assignee: Mobil Oil AS
•
Filing: 1981-06-18
•
Granted: 1983-08-30
•
Expires: 2001-06-18
Abstract
Abstract A method for selectively sorbing Group V-B element hydrides and derivatives thereof from an aqueous solution containing same which comprises contacting said solution under ion-exchange conditions with a crystalline zeolite material having a pore dimension greater than about 5 Angstroms, a Constraint Index between 1 and 12 and a SiO2/Al2O3 mole ratio greater than 12.
Inventors
- 👤 Pochen Chu
- 👤 Francis G. Dwyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:52
CPC Classifications
B; B01; B01D; B01D15/00; B01D53/00; B01D53/02; C; C02; C02F; C02F1/00; C02F1/28; C02F1/281
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
68 words
A method for selectively sorbing hydrides of Group V-B elements of the Periodic Chart of the Elements and derivatives thereof from an aqueous solution containing same which comprises contacting said solution under ion-exchange conditions with a crystalline zeolite material having a pore dimension greater than about 5 Angstroms, a Constraint Index between 1 and 12 and a SiO 2 /Al 2 O 3 mole ratio greater than 12.
Claim 2
Independent Claim
68 words
A method for selectively sorbing hydrides of Group V-B elements of the Periodic Chart of the Elements and derivatives thereof from an aqueous solution containing same which comprises contacting said solution under ion-exchange conditions with a crystalline zeolite material having a pore dimension greater than about 5 Angstroms, a Constraint Index between 1 and 12 and a SiO 2 /Al 2 O 3 mole ratio greater than 12.
Claim 3
Dependent Claim
31 words
A method according to claim 1 wherein said crystalline zeolite material is selected from the group consisting of zeolites having the structure of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
Claim 4
Dependent Claim
17 words
A method according to claim 2 wherein said crystalline zeolite material has the structure of zeolite ZSM-5.
Claim 5
Dependent Claim
17 words
A method according to claim 2 wherein said crystalline zeolite material has the structure of zeolite ZSM-11.
Claim 6
Dependent Claim
17 words
A method according to claim 2 wherein said crystalline zeolite material has the structure of zeolite ZSM-12.
Claim 7
Dependent Claim
17 words
A method according to claim 2 wherein said crystalline zeolite material has the structure of zeolite ZSM-23.
Claim 8
Dependent Claim
17 words
A method according to claim 2 wherein said crystalline zeolite material has the structure of zeolite ZSM-35.
Claim 9
Dependent Claim
17 words
A method according to claim 2 wherein said crystalline zeolite material has the structure of zeolite ZSM-38.
Claim 10
Dependent Claim
17 words
A method according to claim 2 wherein said crystalline zeolite material has the structure of zeolite ZSM-48.
Claim 11
Dependent Claim
18 words
A method according to claim 1 wherein said Group V-B element is nitrogen, phosphorus, arsenic, antimony or bismuth.
Claim 12
Dependent Claim
13 words
A method according to claim 1 wherein said Group V-B element is nitrogen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |