US4142995A
Expired / Lapsed
US
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Method of producing zeolitic catalysts with silica alumina matrix
Assignee: HARSHAW/FILTROL PARTNERSHIP A PARTNERSHIP OF
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Filing: 1977-02-16
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Granted: 1979-03-06
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Expires: 1997-02-16
Abstract
Abstract This invention relates to zeolitic catalysts composed of an exchanged zeolite of the faujasite type and a matrix composed of alumina and an alumina-silica component.
Inventors
- 👤 Hamid Alafandi
- 👤 Dennis Stamires
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:31
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A method of forming a cracking catalyst which comprises mixing a faujasite type zeolite with sodium silicate to form a slurry, adjusting the pH of the slurry to about 3 to about 3.5 by addition of aluminum sulfate, adding ammonium hydroxide to adjust the pH to about 9 to about 9.5, forming a silica-alumina gel and zeolite mixture separating the zeolite and silica-alumina gel mixture from the slurry and washing the separated mixture and further exchanging the said zeolite with a salt solution, other than an alkali metal salt solution, and drying the zeolite.
Claim 2
Independent Claim
94 words
A method of forming a cracking catalyst which comprises mixing a faujasite type zeolite with sodium silicate to form a slurry, adjusting the pH of the slurry to about 3 to about 3.5 by addition of aluminum sulfate, adding ammonium hydroxide to adjust the pH to about 9 to about 9.5, forming a silica-alumina gel and zeolite mixture separating the zeolite and silica-alumina gel mixture from the slurry and washing the separated mixture and further exchanging the said zeolite with a salt solution, other than an alkali metal salt solution, and drying the zeolite.
Claim 3
Dependent Claim
16 words
The process of claim 1 in which the first mentioned zeolite is a rare earth Y.
Claim 4
Dependent Claim
27 words
The process of claim 1 in which the zeolite in the slurry at pH of about 9 to about 9.5 is exchanged with rare earth salt solution.
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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |