Patent US4198320A successfully refreshed from Google Patents.
US4198320A
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US
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Cracking catalyst with improved resistance to poisoning by metals
Assignee: Mobil Oil AS
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Filing: 1978-10-12
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Granted: 1980-04-15
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Expires: 1998-10-12
Abstract
Abstract Amorphous (e.g., silica-alumina) and/or crystalline (e.g. aluminosilicate zeolite) cracking catalysts having improved resistance to metal poisoning are provided when colloidal dispersions, such as silica and/or alumina are added thereto.
Inventors
- 👤 Arthur W. Chester
- 👤 William A. Stover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:48
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J37/00; B01J37/02; B01J37/0236; C10G11/05
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
126 words
In the preparation of an inorganic oxide gel-containing cracking catalyst for converting hydrocarbons, the improvement which comprises incorporating into the catalyst subsequent to gel formation a colloidal dispersion of an oxide selected from silica, alumina or silica-alumina to deposit between about 0.1 and about 50 weight percent of said oxide therein, said colloidal dispersion having a particle size of from 10 to 10,000 A and where said cracking catalyst has a crystalline aluminosilicate zeolite in finely divided form contained in and distributed throughout the inorganic gel matrix whereby the resulting catalyst composite is characterized by (1) a resistance to metal poisoning and (2) a reduction in contaminant hydrogen and coke yields greater than that of corresponding catalysts which have not undergone treatment with said colloidal dispersion.
Claim 2
Dependent Claim
126 words
In the preparation of an inorganic oxide gel-containing cracking catalyst for converting hydrocarbons, the improvement which comprises incorporating into the catalyst subsequent to gel formation a colloidal dispersion of an oxide selected from silica, alumina or silica-alumina to deposit between about 0.1 and about 50 weight percent of said oxide therein, said colloidal dispersion having a particle size of from 10 to 10,000 A and where said cracking catalyst has a crystalline aluminosilicate zeolite in finely divided form contained in and distributed throughout the inorganic gel matrix whereby the resulting catalyst composite is characterized by (1) a resistance to metal poisoning and (2) a reduction in contaminant hydrogen and coke yields greater than that of corresponding catalysts which have not undergone treatment with said colloidal dispersion.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein said colloidal dispersion is a silica sol.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein said colloidal dispersion is an alumina sol.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein said colloidal dispersion is a silica-alumina sol.
Claim 6
Dependent Claim
20 words
The method of claim 1 wherein the amount of deposited oxide is between about 1 and about 10 weight percent.
Claim 7
Dependent Claim
13 words
The method of claim 5 wherein said colloidal dispersion is a silica sol.
Claim 8
Dependent Claim
13 words
The method of claim 5 wherein said colloidal dispersion is an alumina sol.
Claim 9
Dependent Claim
13 words
The method of claim 5 wherein said colloidal dispersion is a silica-alumina sol.
Claim 10
Dependent Claim
16 words
The method of claim 5 wherein said crystalline aluminosilicate zeolite is zeolite X or zeolite Y.
Claim 11
Dependent Claim
13 words
The method of claim 1 wherein said cracking catalyst is in fluid form.
Claim 12
Dependent Claim
18 words
The method of claim 1 wherein said colloidal oxide dispersion is added to said catalyst after drying thereof.
Claim 13
Dependent Claim
23 words
The method of claim 1 wherein said colloidal oxide dispersion is added to said catalyst during use thereof in a catalytic cracking operation.
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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |