US3974099A
Expired / Lapsed
US
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High activity amorphous silica-alumina catalyst
Assignee: WR Grace and Co
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Filing: 1975-04-08
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Granted: 1976-08-10
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Expires: 1995-04-08
Abstract
Abstract An amorphous hydrocarbon cracking catalyst of high activity is prepared by mixing solutions of sodium silicate and sodium aluminate, allowing the gel and age, acidulating said gel to precipitate the excess aluminate and ion exchanging after drying to accomplish removal of the alkali metal.
Inventors
- 👤 Roger Jean Lussier
- 👤 John Storey Magee, Jr.
- 👤 Edwin Wolf Albers
- 👤 George John Surland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:15
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J21/00; B01J21/06; B01J21/08; B01J21/12; B01J37/00; B01J37/02; B01J37/03; B01J37/036
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
100 words
A process of preparing a high amorphous hydrocarbon cracking catalyst which comprises: a. mixing solutions of a soluble aluminum compound and sodium silicate in a weight ratio of Al 2 O 3 to SiO 2 from 0.64 to 1 to 5.7 to 1 b. aging the resulting gel, c. adjusting the pH of the gel to a pH of 5.0 to 10.0 to precipitate excess alumina, d. drying the resulting composite, e. grinding and exchanging with an ammonium sulfate solution to reduce the Na 2 O content to less than 1 percent, and, f. washing, drying and recovering the product.
Claim 2
Dependent Claim
100 words
A process of preparing a high amorphous hydrocarbon cracking catalyst which comprises: a. mixing solutions of a soluble aluminum compound and sodium silicate in a weight ratio of Al 2 O 3 to SiO 2 from 0.64 to 1 to 5.7 to 1 b. aging the resulting gel, c. adjusting the pH of the gel to a pH of 5.0 to 10.0 to precipitate excess alumina, d. drying the resulting composite, e. grinding and exchanging with an ammonium sulfate solution to reduce the Na 2 O content to less than 1 percent, and, f. washing, drying and recovering the product.
Claim 3
Dependent Claim
14 words
The process according to claim 1 wherein the soluble aluminum compound is sodium aluminate.
Claim 4
Dependent Claim
21 words
The process according to claim 1 wherein gel is aged at a temperature of 70 to 180°F. for about 1/2 hour.
Claim 5
Dependent Claim
21 words
The process according to claim 1 wherein the pH of the gel is adjusted with a 10% solution of sulfuric acid.
Claim 6
Dependent Claim
23 words
The process according to claim 1 wherein the product contains about 40 to 85 percent alumina and about 15 to 60 percent silica.
Claim 7
Dependent Claim
28 words
The process according to claim 1 wherein the Na 2 O is reduced to less than 0.5 percent by successive washes with a 10 percent ammonium sulfate 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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |