Patent US4331644A successfully refreshed from Google Patents.
US4331644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion catalyst and process for using same
Assignee: Katalistiks International Inc
•
Filing: 1979-05-08
•
Granted: 1982-05-25
•
Expires: 1999-05-08
Abstract
Abstract A unique class of copper zeolite combustion catalysts which are both highly siliceous and contain an extraordinary amount of zeolitic divalent copper cations which are prepared by ion exchanging the predominantly alkali metal cation form of ZSM-5 type zeolites with divalent copper cations and subjecting the resulting compositions to rigorous oxidation.
Inventors
- 👤 James S. Ritscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:21
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/40; B01J29/42; B01J29/46; B01J29/08; B01J29/10; B01J29/14; B01J29/146; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/36; B01J2229/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
Process for oxidatively combusting a chemical compound selected from the group consisting of hydrocarbons, carbon monoxide and oxygenated hydrocarbons which comprises contacting said compound in admixture with oxygen at a temperature of from 100° C. to 450° C. with a copper zeolite having in the dehydrated state a composition in terms of mole ratios of oxides as: 1.6-2.0Cu.sup.++ 0:0-0.2M.sub.2/n O:Al.sub.2 O.sub.3 :20-100SiO.sub.2 wherein M is at least one cation other than Cu ++ having a valence of "n", said zeolite composition having a characteristic X-ray powder diffraction pattern containing at least the d-spacings of Table I.
Claim 2
Dependent Claim
96 words
Process for oxidatively combusting a chemical compound selected from the group consisting of hydrocarbons, carbon monoxide and oxygenated hydrocarbons which comprises contacting said compound in admixture with oxygen at a temperature of from 100° C. to 450° C. with a copper zeolite having in the dehydrated state a composition in terms of mole ratios of oxides as: 1.6-2.0Cu.sup.++ 0:0-0.2M.sub.2/n O:Al.sub.2 O.sub.3 :20-100SiO.sub.2 wherein M is at least one cation other than Cu ++ having a valence of "n", said zeolite composition having a characteristic X-ray powder diffraction pattern containing at least the d-spacings of Table I.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |