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Patent US4219446A successfully refreshed from Google Patents.
US4219446A
Expired / Lapsed
US
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Zeolite-containing silica-alumina hydrogel catalyst and method of making same
Assignee: Mobil Oil AS
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Filing: 1978-04-26
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Granted: 1980-08-26
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Expires: 1998-04-26
Abstract
Abstract A specially prepared zeolite-containing silica-alumina hydrogel gives a catalyst that is attrition resistant, more active catalytically, more selective and more stable. The hydrogel is prepared by steps including nozzle mixing of reactants to form a hydrogel, ion exchanging with ammonium, aluminum and rare earth ions, washing, drying and impregnating with rare earths.
Inventors
- 👤 Guenter H. Kuehl
- 👤 Howard S. Sherry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:00
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/085; B01J29/088; B01J37/00; B01J37/0009; B01J37/0027; B01J37/0045
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A cracking catalyst made by a method comprising the steps of: (1) nozzle-mixing of an acid alum stream with a second stream comprising sodium silicate, alkali metal hydroxide and suspended fines; (2) forming droplets of the resulting sol and causing them to gel; (3) exchanging the gel by contacting same, in order, with (a) an ammonium salt solution, (b) an aluminum salt solution and (c) a rare earth salt solution; (4) washing with water; (5) homogenizing; (6) spray drying; (7) impregnating with rare earth ions; and (8) drying.
Claim 2
Dependent Claim
88 words
A cracking catalyst made by a method comprising the steps of: (1) nozzle-mixing of an acid alum stream with a second stream comprising sodium silicate, alkali metal hydroxide and suspended fines; (2) forming droplets of the resulting sol and causing them to gel; (3) exchanging the gel by contacting same, in order, with (a) an ammonium salt solution, (b) an aluminum salt solution and (c) a rare earth salt solution; (4) washing with water; (5) homogenizing; (6) spray drying; (7) impregnating with rare earth ions; and (8) drying.
Claim 3
Dependent Claim
21 words
The catalyst of claim 1 wherein said fines are selected from the group consisting of crystalline aluminosilicate zeolites, alumina and clays.
Claim 4
Dependent Claim
19 words
The catalyst of claim 1 wherein said droplets range in size from about 0.1 mm to about 15 mm.
Claim 5
Dependent Claim
22 words
The catalyst of claim 1 wherein said fines includes a crystalline aluminosilicate zeolite comprising from about 5 to about 30% by weight.
Claim 6
Dependent Claim
18 words
The catalyst of claim 1 wherein in step (3) at least 60% of the original cation is removed.
Claim 7
Dependent Claim
14 words
The catalyst of claim 4 wherein said zeolite is rare earth exchanged zeolite Y.
Claim 8
Dependent Claim
95 words
An improved method of preparing a cracking catalyst comprising the steps of: (1) nozzle-mixing of an acid alum stream with a second stream comprising sodium silicate, alkali metal hydroxide and suspended fines; (2) forming droplets of the resulting sol and causing them to gel; (3) washing with water; (4) homogenizing; (5) spray drying; (6) impregnating with rare earth ions; and (7) drying; the improvement whereby the gel is exchanged following its formation by contacting same, in order, with (a) an ammonium salt solution, (b) an aluminum salt solution and (c) a rare earth salt solution.
Claim 9
Dependent Claim
95 words
An improved method of preparing a cracking catalyst comprising the steps of: (1) nozzle-mixing of an acid alum stream with a second stream comprising sodium silicate, alkali metal hydroxide and suspended fines; (2) forming droplets of the resulting sol and causing them to gel; (3) washing with water; (4) homogenizing; (5) spray drying; (6) impregnating with rare earth ions; and (7) drying; the improvement whereby the gel is exchanged following its formation by contacting same, in order, with (a) an ammonium salt solution, (b) an aluminum salt solution and (c) a rare earth salt solution.
Claim 10
Dependent Claim
21 words
The method of claim 7 wherein said fines are selected from the group consisting of crystalline aluminosilicate zeolites, alumina and clays.
Claim 11
Dependent Claim
20 words
The method of claim 7 wherein said droplets range in size of from about 0.1 mm to about 15 mm.
Claim 12
Dependent Claim
22 words
The method of claim 7 wherein said fines includes a crystalline aluminosilicate zeolite comprising from about 5 to about 30% by weight.
Claim 13
Dependent Claim
18 words
The method of claim 7 wherein in step (3) at least 60% of the original cation is removed.
Claim 14
Dependent Claim
14 words
The method of claim 10 wherein said zeolite is rare earth exchanged zeolite Y.
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) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |