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US3674709A
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Aluminosilicates containing sodalite and/or cancrinite cages encapsulating salts
Assignee: Air Products and Chemicals Inc
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Filing: 1969-10-08
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Granted: 1972-07-04
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Expires: 1989-10-08
Abstract
Abstract Kaolinite and a salt are subjected to hot aqueous alkali for at least 2 days to prepare a crystalline zeolite (e.g., cancrinite and/or sodalite) having the salt encapsulated in the cages of the crystalline zeolite.
Inventors
- 👤 Richard M Barrer
- 👤 John F Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:40
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/70; B01J29/72; B01J29/76; C; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2892; Y; Y10; Y10S; Y10S423/00; Y10S423/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
12 words
The method of claim 1 in which the product is a sodalite.
Claim 2
Dependent Claim
46 words
The product of claim 2 in which the sodalite has a formula corresponding to 6(Na Al SiO4) . x Na ClO4 . y H2O . z NaOH in which x has a value greater than 1, said sodalite having a capacity for generating oxygen when heated.
Claim 3
Dependent Claim
44 words
The method of claim 1 in which an ion of the salt comprises a metal susceptible of a plurality of stable valences, the product being treated with a reducing gas to at least partially reduce such metal ion and to provide a supported catalyst.
Claim 4
Dependent Claim
24 words
The method of claim 4 in which a cancrinite containing encapsulated cupric ammonium sulfate is treated with hydrogen to provide a copper cancrinite catalyst.
Claim 5
Dependent Claim
11 words
A catalyst prepared by reduction of the product of claim 5.
Claim 6
Dependent Claim
31 words
The method of claim 1 in which sodium ferrate is the salt and in which the product is an iron-salt imbibed'' Zeolite H having X-ray diffraction measurements corresponding to Table IV.
Claim 7
Dependent Claim
21 words
The method of claim 1 in which sodium nitrate is the salt and a cancrinite containing sodium nitrate is the product.
Claim 8
Dependent Claim
28 words
The method of claim 1 in which the sodium hydroxide concentration is about 4 molar and in which the salt concentration is significantly greater than the kaolinite concentration.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |