US3647718A
Expired / Lapsed
US
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Microspherical zeolitic molecular sieve composite catalyst and preparation thereof
Assignee: BASF Catalysts LLC
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Filing: 1969-03-25
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Granted: 1972-03-07
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Expires: 1989-03-25
Abstract
Abstract A FULID ZEOLITIC MOLECULAR SIEVE COMPOSITE CATALYST IS PREPARED BY REACTING A MIXTURE OF TWO DIFFERENT FORMS OF CALCINED KAOLIN CLAYS IN AN AQUEOUS ALKALINE REACTION LIQUID, THE TWO DIFFERENT FORMS OF CALCINED KAOLIN CLAY BEING PRESENT IN SEPARATE PREFORMED MICROSPHERES WHICH RETAIN SUBSTANTIALLY THEIR SIZE AND FROM THROUGHOUT THE REACTION. SILICA IS EXTRACTED FROM THE MICROSPHERES DURING REACTION. THE REACTED MICROSPHERES ARE SEPARATED FROM THE MOTHER LIQUID AND THEN THEY ARE ION EXCHANGED.
Inventors
- 👤 Walter L Haden Jr
- 👤 Frank J Dzierzanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:48
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C10G11/05; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |