Patent US4218344A successfully refreshed from Google Patents.
US4218344A
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US
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Catalytic cracking with reduced emission of noxious gases
Assignee: Rheinmetall Industrie AG
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Filing: 1979-01-11
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Granted: 1980-08-19
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Expires: 1999-01-11
Abstract
Abstract A cyclic, fluidized catalytic cracking process providing reduced emissions of noxious effluents in regeneration zone flue gases is operated with homogeneous or non-homogeneous, regenerable, fluidized, solid particles which are circulated throughout the catalytic cracking process cycle and which comprise (1) a molecular sieve-type cracking catalyst, comprising a cracking catalyst matrix containing crystalline aluminosilicate distributed throughout said matrix and (2) a metallic reactant which reacts with sulfur oxides in the regeneration zone.
Inventors
- 👤 Iacovos A. Vasalos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:45
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/061
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
90 words
A fluidizable solid cracking catalyst composition for use in the cracking of hydrocarbon feedstocks containing organic sulfur compounds under fluidizing conditions, comprising a silica-alumina cracking catalyst matrix containing from about 10 to about 65 weight percent of alumina and from about 35 to about 90 weight percent of silica, wherein from about 0.5 to about 50 weight percent of a molecular sieve is distributed throughout said matrix, and wherein from about 0.6 to about 3 weight percent of sodium is incorporated onto the surface of said molecular sieve containing matrix.
Claim 2
Dependent Claim
90 words
A fluidizable solid cracking catalyst composition for use in the cracking of hydrocarbon feedstocks containing organic sulfur compounds under fluidizing conditions, comprising a silica-alumina cracking catalyst matrix containing from about 10 to about 65 weight percent of alumina and from about 35 to about 90 weight percent of silica, wherein from about 0.5 to about 50 weight percent of a molecular sieve is distributed throughout said matrix, and wherein from about 0.6 to about 3 weight percent of sodium is incorporated onto the surface of said molecular sieve containing matrix.
Claim 3
Dependent Claim
47 words
The composition as set forth in claim 1 wherein said sodium is incorporated onto the surface of said molecular sieve containing matrix by introducing one or more sodium compounds into a catalytic cracking process wherein hydrocarbons are cracked in the presence of said molecular sieve containing matrix.
Claim 4
Dependent Claim
51 words
The composition as set forth in claim 2 wherein the sodium is incorporated onto the surface of said molecular sieve containing matrix by introducing an aqueous solution of one or more sodium compounds into a catalytic cracking process wherein hydrocarbons are cracked in the presence of said molecular sieve containing matrix.
Claim 5
Dependent Claim
33 words
The composition as set forth in claim 1 wherein said sodium is incorporated onto the surface of said molecular sieve containing matrix by impregnation with one or more sodium compounds followed by calcination.
Claim 6
Dependent Claim
16 words
The composition as set forth in claim 1 wherein said sodium is in non-ion exchanged form.
References Cited (Backward Citations)
US4072600A
Cited
US4093535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |