US3640681A
Expired / Lapsed
US
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Process for preparing supersiliceous zeolites
Assignee: Union Carbide Corp
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Filing: 1969-12-17
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Granted: 1972-02-08
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Expires: 1989-12-17
Abstract
Abstract Framework aluminum is extracted from crystalline zeolitic molecular sieves, using acetylacetone as the extracting agent. Prior to contact with the acetylacetone, the zeolite must be rendered substantially cation-deficient and be at least partially dehydroxylated. Other metal values can be substituted for the framework aluminum by contacting the zeolite either before or after acetylacetone extraction with a metal acetylacetonate. The products are useful hydrocarbon conversion catalysts.
Inventors
- 👤 Eugene Pickert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:35
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2884; C07; C07C; C07C2/00; C07C2/54; C07C2529/00; C07C2529/04; C07C2529/06; Y; Y10; Y10S; Y10S423/00; Y10S423/21; Y10S423/25; Y10S423/26; Y10S423/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
29 words
Process according to claim 1 wherein the cation deficient zeolite is thermally dehydroxylated by heating at a temperature of from about 400* C. up to the crystal destruction temperature.
Claim 2
Dependent Claim
31 words
Process according to claim 2 wherein the extractant is acetylacetone and the extraction of framework aluminum from the zeolite is carried out at a temperature of from 0* to 200* C.
Claim 3
Dependent Claim
17 words
Process according to claim 3 wherein the starting zeolite has a SiO2/Al2O3 molar ratio greater than 3.
Claim 4
Dependent Claim
22 words
Process according to claim 3 which includes the further step of contacting the zeolite after extraction with acetylacetone with a metal acetylacetonate.
Claim 5
Dependent Claim
24 words
Process according to claim 5 wherein the metal of the metal acetylacetonate is one which forms a trivalent oxide thermally stable at 600* C.
Claim 6
Dependent Claim
24 words
Process according to claim 5 wherein the metal of the metal acetylacetonate is one which forms a tetravalent oxide thermally stable at 600* C.
Claim 7
Dependent Claim
24 words
Process according to claim 5 wherein the meta of the metal acetylacetonate is one which forms a pentavalent oxide thermally stable at 600* C.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |