Patent US3617583A successfully refreshed from Google Patents.
US3617583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of lime
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1969-09-29
•
Granted: 1971-11-02
•
Expires: 1989-09-29
Abstract
Abstract A high-sulfur fuel oil can be used for firing limestone in lime kilns. The fuel oil is passed through a fluidized bed gasifier, containing fluidized lime or limestone which reacts with sulfur in the fuel oil, and substantially sulfur-free gases pass from the gasifier to fire the lime kiln.
Inventors
- 👤 Gerald Moss
- 👤 Geoffrey P Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:43
CPC Classifications
C; C04; C04B; C04B2/00; C04B2/10; C04B2/108
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
31 words
A process according to claim 3 in which a material containing said sulfur-containing compounds is withdrawn from the gasifier and the corresponding metallic oxide is regenerated and returned to said gasifier.
Claim 2
Dependent Claim
27 words
A process as claimed in claim 1 wherein the said material that reacts with sulfur, is an oxide or a heat decomposible carbonate, of calcium and/or magnesium.
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1 wherein the said hydrocarbon fuel is a hydrocarbon fuel oil.
Claim 4
Dependent Claim
14 words
A process as claimed in claim 1 wherein the said hydrocarbon fuel is coal.
Claim 5
Dependent Claim
23 words
A process as claimed in claim 1 wherein the said amount of oxygen is from 40 to 60 percent of the stoichiometric requirement.
Claim 6
Dependent Claim
21 words
A process as claimed in claim 1 wherein the bed temperature in the said gasifier is from 800* to 950* C.
Claim 7
Dependent Claim
25 words
A process as claimed in claim 1 wherein the particles size of the fluidized bed material in the gasifier is from 0.5 to 2 mm.
Claim 8
Dependent Claim
51 words
A process as claimed in claim 1 wherein sulfur reactive material is passed, continuously or intermittantly, through the gasifier and wherein the temperature in the gasifier is controlled by controlling the throughput of the sulfur reactive fluidized bed material relative to that of the hydrocarbon fuel being gasified in the gasifier.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |