Patent US4421431A successfully refreshed from Google Patents.
US3844934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual catalyst converter process
Assignee: Mobil Oil AS
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Filing: 1973-03-06
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Granted: 1974-10-29
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Expires: 1993-03-06
Abstract
Abstract A catalytic converter and method of operating the same is described for the use of two beds of catalyst of different characteristics arranged in series in the same reactor and provided with valving and operating characteristics such that the two catalysts may be used in the same manner as though they were disposed in parallel reactors.
Inventors
- 👤 J Bonacci
- 👤 K Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:10
CPC Classifications
C; C10; C10G; C10G65/00; B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01J8/0446; B01J8/0449; B01J8/0453; B01J8/0492; C10G59/00; B01J2208/00; B01J2208/02; B01J2208/023; B01J2208/024; B01J2208/025; C10G2400/00; C10G2400/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A NEW USE FOR A DUAL CATALYST CONVERTER HAVING AN UPPER BED OF PLATINUM GROUP METAL ON ALUMINA REFORMING CATALYST AND A LOWER BED OF SHAPE SELECTIVE HYDROCARACKING CATALYST TO AFFORD FLEXIBILITY IN OPERATION TO PASS REACTANTS SELECTIVELY THROUGH BOTH BEDS IN SEQUENCE OR THROUGH EITHER BED ALONE WHICH COMPRISES: A. ARRANGING THE TWO DISCRETE BEDS IN SPACED APART RELATION AND EACH SPACED FROM THE EXTREMITY OF THE CONVERTER ADJACENT THERETO THEREBY PROVIDING A COMMON PLENUM CHAMBER BETWEEN THE BEDS AND A TERMINAL PLENUM CHAMBER ADJACENT EACH BED ON THE SIDE THEREOF REMOTE FROM THE OTHER BED; B. PROVIDING INLET MEANS TO THE COMMON PLENUM CHAMBER; C. PROVIDING BOTH INLET MEANS AND OUTLET MEANS TO EACH OF THE TERMINAL PLENUM CHAMBERS;
Claim 2
Dependent Claim
121 words
A NEW USE FOR A DUAL CATALYST CONVERTER HAVING AN UPPER BED OF PLATINUM GROUP METAL ON ALUMINA REFORMING CATALYST AND A LOWER BED OF SHAPE SELECTIVE HYDROCARACKING CATALYST TO AFFORD FLEXIBILITY IN OPERATION TO PASS REACTANTS SELECTIVELY THROUGH BOTH BEDS IN SEQUENCE OR THROUGH EITHER BED ALONE WHICH COMPRISES: A. ARRANGING THE TWO DISCRETE BEDS IN SPACED APART RELATION AND EACH SPACED FROM THE EXTREMITY OF THE CONVERTER ADJACENT THERETO THEREBY PROVIDING A COMMON PLENUM CHAMBER BETWEEN THE BEDS AND A TERMINAL PLENUM CHAMBER ADJACENT EACH BED ON THE SIDE THEREOF REMOTE FROM THE OTHER BED; B. PROVIDING INLET MEANS TO THE COMMON PLENUM CHAMBER; C. PROVIDING BOTH INLET MEANS AND OUTLET MEANS TO EACH OF THE TERMINAL PLENUM CHAMBERS;
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |