US3915844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treatment of heavy oils
Assignee: Mitsui Engineering and Shipbuilding Co Ltd
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Filing: 1973-11-28
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Granted: 1975-10-28
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Expires: 1993-11-28
Abstract
Abstract Method for treatment of heavy oils characterized in that a powdery or granular alkali metal compound in the heated state is fed to the coker independently from the starting oil to effect desulfurization of the starting oil and to form granular coke, and the resulting granular coke is gasified with steam and oxygen or air in the fluidized bed gasification furnace.
Inventors
- 👤 Mikio Ueda
- 👤 Shigenori Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:51
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/54; C10B; C10B55/00; C10B55/02; C10B55/04; C10B55/08; C10B55/10; C10J3/48; C10J3/482; C10J2300/00; C10J2300/09; C10J2300/0903; C10J2300/0913; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/0983; C10J2300/0996; C10J2300/18; C10J2300/1807
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
IN A METHOD FOR TREATMENT OF HEAVY HYDROCARBON COKER FEEDSTOCKS WHEREIN THE HEAVY HYDROCARBON COKER FEEDSTOCK IS COKED IN A FLUIDIZED BED COKING FURNACE PRODUCING GRANULAR COKE PARTICLES, AND THE RESULTANT COKE PARTICLES ARE GASIFIED IN A FLUIDIZED BED GASIFICATION FURNACE, THE IMPRIVEMENT COMPRISING ADDING PARTICLES CONSISTING OF AN ALKALI METAL COMPOUND OR AN ALKALI METAL COMPOUND SUPPORTED ON AN INORGANIC REFRACTORY OR AN ALKALINE EARTH METAL COMPOUND SUPPORT MEDIUM TO SAID COKING FURNACE INDEPENDENTLY OF THE HYDROCARBON COKER FEEDSTOCK, SAID ALKALI METAL COMPOUND BEING HEATED TO A TEMPERATURE OF 100*C. TO 500*C. HIGHER THAN THE TEMPERATURE IN THE COKING FURNACE AT THE TIME SAID ALKALI METAL COMPOUND IS COMBINED WITH SAID HYDROCARBON COKER FEEDSTOCK IN SAID COKING FURNACE, WHEREBY SAID PARTICULATE ALKALI METAL COMPOUND ACTS AS SEED PARTICLES FOR THE FORMATION AND GROWTH OF READILY GASIFIED GRANULAR COKE PARTICLES HAVING HIGH POROSITY, HIGH SURFACE AREA, AND HIGH OXYGEN CONTENT SURING THE COKING PROCESS.
Claim 2
Dependent Claim
154 words
IN A METHOD FOR TREATMENT OF HEAVY HYDROCARBON COKER FEEDSTOCKS WHEREIN THE HEAVY HYDROCARBON COKER FEEDSTOCK IS COKED IN A FLUIDIZED BED COKING FURNACE PRODUCING GRANULAR COKE PARTICLES, AND THE RESULTANT COKE PARTICLES ARE GASIFIED IN A FLUIDIZED BED GASIFICATION FURNACE, THE IMPRIVEMENT COMPRISING ADDING PARTICLES CONSISTING OF AN ALKALI METAL COMPOUND OR AN ALKALI METAL COMPOUND SUPPORTED ON AN INORGANIC REFRACTORY OR AN ALKALINE EARTH METAL COMPOUND SUPPORT MEDIUM TO SAID COKING FURNACE INDEPENDENTLY OF THE HYDROCARBON COKER FEEDSTOCK, SAID ALKALI METAL COMPOUND BEING HEATED TO A TEMPERATURE OF 100*C. TO 500*C. HIGHER THAN THE TEMPERATURE IN THE COKING FURNACE AT THE TIME SAID ALKALI METAL COMPOUND IS COMBINED WITH SAID HYDROCARBON COKER FEEDSTOCK IN SAID COKING FURNACE, WHEREBY SAID PARTICULATE ALKALI METAL COMPOUND ACTS AS SEED PARTICLES FOR THE FORMATION AND GROWTH OF READILY GASIFIED GRANULAR COKE PARTICLES HAVING HIGH POROSITY, HIGH SURFACE AREA, AND HIGH OXYGEN CONTENT SURING THE COKING PROCESS.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein said particulate alkali metal compound is a member of the group consisting of the carbonates, hydroxides and oxides of the alkali metals or mixtures thereof.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said particulate alkali metal compound is sodium carbonate.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said inorganic refractory support medium is a membeR of the group of alumina, zirconia, murite and chamotte.
Claim 6
Dependent Claim
30 words
The method of claim 1 wherein said alkaline earth metal compound support medium is a member of the group of calcium oxide, calcium carbonate, magnesium oxide, magnesium carbonate and dolomite.
Claim 7
Dependent Claim
55 words
The method of claim 1 wherein the alkali metal compound or alkali metal compound supported on an inorganic refractory or an alkaline earth metal compound support medium acts as a catalyst for the gasification of coke in the gasification furnace and is regenerated and heated in the gasification furnace and recycled to the coker furnace.
References Cited (Backward Citations)
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US3707462A
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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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |