US3663165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zeolitic catalyst and preparation
Assignee: United Microelectronics Corp
•
Filing: 1970-02-09
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Granted: 1972-05-16
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Expires: 1990-02-09
Abstract
Abstract Preformed coherent microspheres obtained by calcining a spray dried slurry of hydrated kaolin clay at elevated temperature (e.g., 1800* F.) are suspended in an aqueous sodium hydroxide solution together with a small amount of finely divided metakaolin (e.g., kaolin clay calcined at 1350* F.). The suspension is aged and then heated until crystalline sodium faujasite appears in the microspheres and a sodium silicate mother liquor is formed. The crystallized microspheres are ionexchanged to produce a fluid zeolitic cracking catalyst.
Inventors
- 👤 Walter L Haden Jr
- 👤 Frank J Dzierzanowskl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:36
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
30 words
The method of claim 1 wherein said metakaolin is incorporated in amount within the range of 2 percent to 35 percent based on the combined weight of metakaolin and microspheres.
Claim 2
Dependent Claim
30 words
The method of claim 1 wherein said metakaolin is incorporated in amount within the range of 5 percent to 10 percent based on the combined weight of metakaolin and microspheres.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the sodium hydroxide solution has a concentration within the range of 10 percent to 22 percent.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the sodium hydroxide solution has a concentration within the range of 14 percent to 19 percent.
Claim 5
Dependent Claim
30 words
The method of claim 5 wherein the sodium hydroxide solution is used in amount to provide from 0.6 to 0.8 mole Na2O per mole Al2O3 in the metakaolin and microspheres.
Claim 6
Dependent Claim
14 words
A zeolitic molecular sieve catalyst prepared in accordance with the method of claim 1.
References Cited (Backward Citations)
US3119659A
Cited
US3338672A
Cited
US3433587A
Cited
US3532459A
Cited
US3492089A
Cited
US3515684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |