US4034065A
Expired / Lapsed
US
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Preparation of CU+ zeolites
Assignee: Katalistiks International Inc
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Filing: 1975-09-26
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Granted: 1977-07-05
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Expires: 1995-09-26
Abstract
Abstract The Cu + + cations of highly siliceous zeolites are found to undergo spontaneous reduction to Cu + cations upon dehydration and to produce oxygen by oxidation of water.
Inventors
- 👤 Paul Haruo Kasai
- 👤 James Nelson Francis
- 👤 Roland Justin Bishop, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:06
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
Process for preparing zeolites containing Cu + cations which comprises providing a crystalline zeolite having pore diameters of at least 4 Angstroms, having a framework SiO 2 /Al 2 O 3 molar ratio of from 15 to 200 and containing bivalent copper cations, contacting and reacting said zeolite as a reagent with water at a temperature of from 200° C. up to the crystal destruction temperature of the zeolite, said zeolite reagent containing insufficient water of hydration to stabilize the bivalent copper cations thereof against reaction with said water.
Claim 2
Dependent Claim
89 words
Process for preparing zeolites containing Cu + cations which comprises providing a crystalline zeolite having pore diameters of at least 4 Angstroms, having a framework SiO 2 /Al 2 O 3 molar ratio of from 15 to 200 and containing bivalent copper cations, contacting and reacting said zeolite as a reagent with water at a temperature of from 200° C. up to the crystal destruction temperature of the zeolite, said zeolite reagent containing insufficient water of hydration to stabilize the bivalent copper cations thereof against reaction with said water.
Claim 3
Dependent Claim
39 words
Process according to claim 1 wherein the bivalent copper zeolite and water are reacted to form the monovalent copper form of the zeolite at a temperature of from 400° C. up to the crystal destruction temperature of the zeolite.
Claim 4
Dependent Claim
26 words
Process according to claim 2 wherein the zeolite starting material has a framework SiO 2 /Al 2 O 3 molar ratio of from 20 to 100.
References Cited (Backward Citations)
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US3253887A
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US3497462A
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US3551353A
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US3702886A
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US3783125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |