Patent US3867310A successfully refreshed from Google Patents.
US3867310A
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Catalyst compositions
Assignee: WR Grace and Co
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Filing: 1972-05-08
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Granted: 1975-02-18
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Expires: 1992-05-08
Abstract
Abstract Hydrocarbon conversion catalysts are prepared by combining partially crystallized synthetic faujasite with amorphous silica, alumina, silica-alumina hydrogel and/or clay.
Inventors
- 👤 Jr Curtis H Elliott
- 👤 Hanson Lee Guidry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:24
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/16; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; C01B33/2838
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A METHOD FOR PREPARING A HYDROCARBON CONVERSION CATALYST WHICH COMPRISES: A. PREPARING A MIXTURE OF SILICA, ALUMINA, ALKALI METAL HYDROXIDE, AND WATER IN RATIOS REQUIRED TO PRODUCE SYNTHETIC FAUJASITE, B. REACTING SAID MIXTURE FOR A PERIOD SUFFICIENT TO PRODUCE FROM ABOUT 5 TO 70 PERCENT OF THE CRYSTALLINE SYNTHETIC FAUJASITE WHICH MAY BE THEORETICALLY PRODUCED FROM SAID REACTION MIXTURE, C. COMBINING THE PRODUCT OF STEP (B) WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, SILICAALUMINA HYDROGEL, CLAY AND MIXTURES THEREOF; D. FORMING SAID MIXTURE INTO A PARTICULATE CATALYST COMPOSITE, AND E. WASHING SAID CATALYST COMPOSITE TO LOWER THE SODA CONTENT THEREOF TO LESS THAN ABOUT 1 PERCENT BY WEIGHT.
Claim 2
Independent Claim
112 words
A METHOD FOR PREPARING A HYDROCARBON CONVERSION CATALYST WHICH COMPRISES: A. PREPARING A MIXTURE OF SILICA, ALUMINA, ALKALI METAL HYDROXIDE, AND WATER IN RATIOS REQUIRED TO PRODUCE SYNTHETIC FAUJASITE, B. REACTING SAID MIXTURE FOR A PERIOD SUFFICIENT TO PRODUCE FROM ABOUT 5 TO 70 PERCENT OF THE CRYSTALLINE SYNTHETIC FAUJASITE WHICH MAY BE THEORETICALLY PRODUCED FROM SAID REACTION MIXTURE, C. COMBINING THE PRODUCT OF STEP (B) WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, SILICAALUMINA HYDROGEL, CLAY AND MIXTURES THEREOF; D. FORMING SAID MIXTURE INTO A PARTICULATE CATALYST COMPOSITE, AND E. WASHING SAID CATALYST COMPOSITE TO LOWER THE SODA CONTENT THEREOF TO LESS THAN ABOUT 1 PERCENT BY WEIGHT.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said faujasite precursor mixture is reacted for a period of from about 5 minutes to 12 hours at a temperature of from 95* to 105*C.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein said faujasite reaction mixture is combined with amorphous silica-alumina seed particles having a particle size of less than about 0.1 micron.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein clay comprises 0 to 50 percent by weight of said catalysts.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein said catalyst is exchanged with rare earth ions.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |