US4059543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clinoptilolite sorbent
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1975-06-23
•
Granted: 1977-11-22
•
Expires: 1995-06-23
Abstract
Abstract Clinoptilolite is exchanged to the ammonium form and then treated with a dilute solution of a strong acid. An adsorbent for acid gases of improved capacity and life is obtained. The adsorbent is preferably in the form of ceramic bonded pellets.
Inventors
- 👤 Joseph R. Kiovsky
- 👤 Pramad B. Koradia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:27
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01D; B01D53/00; B01D53/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
36 words
An acid gas sorbent consisting of clinoptilolite which has been ammonium exchanged to remove essentially all exchangeable metal cations and has been acid treated to increase the silica to alumina ratio to not greater than 11.5.
Claim 2
Dependent Claim
36 words
An acid gas sorbent consisting of clinoptilolite which has been ammonium exchanged to remove essentially all exchangeable metal cations and has been acid treated to increase the silica to alumina ratio to not greater than 11.5.
Claim 3
Dependent Claim
35 words
Natural clinoptilolite, in the hydrogen exchanged form, having a silica to alumina ratio greater than in the naturally occuring product but not greater than 11.5, and containing no exchangeable alkali or alkaline earth metal cations.
Claim 4
Dependent Claim
35 words
Natural clinoptilolite, in the hydrogen exchanged form, having a silica to alumina ratio greater than in the naturally occuring product but not greater than 11.5, and containing no exchangeable alkali or alkaline earth metal cations.
Claim 5
Dependent Claim
43 words
A sorbent pellet for sorption of acid gases consisting of natural clinoptilolite bonded by an acid resistant ceramic bond, said clinoptilolite being in the hydrogen exchanged form containing no exchangeable potassium and having a silica to alumina ratio of between 9.7 and 11.5.
Claim 6
Dependent Claim
43 words
A sorbent pellet for sorption of acid gases consisting of natural clinoptilolite bonded by an acid resistant ceramic bond, said clinoptilolite being in the hydrogen exchanged form containing no exchangeable potassium and having a silica to alumina ratio of between 9.7 and 11.5.
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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |