US4382023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyzed combustion in cracking catalyst
Assignee: Chevron USA Inc
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Filing: 1981-02-04
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Granted: 1983-05-03
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Expires: 2001-02-04
Abstract
Abstract The volume ratio of CO 2 /CO in cracking catalyst regenerator flue gas is increased without adverse effect on cracking conversion and selectivity by employing a chromium oxidation catalyst at a high concentration in a small proportion of particles circulating in a cracking system.
Inventors
- 👤 Bernard F. Mulaskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:43
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/076; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A composition of matter comprising a mixture of (a) from 95 to 99.55 weight percent of particles of an acidic cracking catalyst comprising silica and at least one other refractory inorganic oxide; and (b) from 0.05 to 5 weight percent of particles of an oxidation-promoting catalyst which includes greater than 10 weight percent chromium calculated as elemental metal and from 0.01 to 1 part, by weight, of tin for each part of chromium present, and further the concentration of chromium in the entire composition of matter being between 0.01 and 3.5 weight percent, calculated as elemental metal.
Claim 2
Dependent Claim
97 words
A composition of matter comprising a mixture of (a) from 95 to 99.55 weight percent of particles of an acidic cracking catalyst comprising silica and at least one other refractory inorganic oxide; and (b) from 0.05 to 5 weight percent of particles of an oxidation-promoting catalyst which includes greater than 10 weight percent chromium calculated as elemental metal and from 0.01 to 1 part, by weight, of tin for each part of chromium present, and further the concentration of chromium in the entire composition of matter being between 0.01 and 3.5 weight percent, calculated as elemental metal.
Claim 3
Dependent Claim
40 words
A composition of matter according to claim 1 wherein said particles of oxidation catalyst are formed by (a) forming a gel by mixing a liquid solution of a chromium compound with an epoxide, and (b) shaping and drying the gel.
Claim 4
Dependent Claim
31 words
A composition of matter according to claim 1 wherein the concentration of chromium in said composition of matter is from greater than 1 to 3.5 weight percent, calculated as elemental metal.
References Cited (Backward Citations)
GB1499682A
Cited
US4241033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |