US3249402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of sulfur from blast furnace slag
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1962-10-02
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Granted: 1966-05-03
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Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 William H Smyers
- 👤 Erwin H Manny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:21
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B3/06; C01; C01B; C01B17/00; C01B17/02; C01B17/06; C21B2100/00; C21B2100/40; C21B2100/42; C21B2400/00; C21B2400/02; C21B2400/022; C21B2400/024; C21B2400/05; C21B2400/066; C21B2400/072; C21B2400/08; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y02W; Y02W30/00; Y02W30/50; Y10; Y10S; Y10S75/00; Y10S75/958
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PROCESS FOR RECOVERING SULFUR FROM MOLTEN BLAST FURNACE SLAG FORMED BY THE REDUCTION OF IRON ORE TO IRON USING A CARBONACEOUS FUEL AND A LIMESTONE FLUX, WHEREIN SAID SLAG HAS A SULFUR CONTENT OF ABOUT 1 TO 2%, AND WHEREIN SAID SULFUR IS IN THE FORM OF CALCIUM SULFIDE DISSOLVED IN CALCIUM ALUMINOSILICATE, WHICH COMPRISES CONTACTING SAID MOLTEN SLAG WHILE IT IS COOLING FROM ABOUT 3000*F. TO A TEMPERATURE IN THE RANGE OF ABOT 2400* TO 2700*F., WITH ABOUT 100 TO 400 CUBIC FEET PER TON OF SLAG OF SUPERHEATED STEAM AT A TEMPERATURE OF ABOUT 500* TO 2500*F. TO EVOLVE H2S, DRAWING OFF A HOT GASEOUS STREAM OF H2S AND H2O, INJECTING AN OXYGEN-CONTAINING STREAM INTO SAID GASEOUS STREAM OF H2S AND H2O TO THEREBY REACT OXYGEN WITH THE H2S AT A TEMPERATURE OF ABOUT 2000* TO 2700*F. TO FORM H2O AND SULFUR, AND THEN RECOVERING SAID SULFUR.
Claim 2
Dependent Claim
150 words
A PROCESS FOR RECOVERING SULFUR FROM MOLTEN BLAST FURNACE SLAG FORMED BY THE REDUCTION OF IRON ORE TO IRON USING A CARBONACEOUS FUEL AND A LIMESTONE FLUX, WHEREIN SAID SLAG HAS A SULFUR CONTENT OF ABOUT 1 TO 2%, AND WHEREIN SAID SULFUR IS IN THE FORM OF CALCIUM SULFIDE DISSOLVED IN CALCIUM ALUMINOSILICATE, WHICH COMPRISES CONTACTING SAID MOLTEN SLAG WHILE IT IS COOLING FROM ABOUT 3000*F. TO A TEMPERATURE IN THE RANGE OF ABOT 2400* TO 2700*F., WITH ABOUT 100 TO 400 CUBIC FEET PER TON OF SLAG OF SUPERHEATED STEAM AT A TEMPERATURE OF ABOUT 500* TO 2500*F. TO EVOLVE H2S, DRAWING OFF A HOT GASEOUS STREAM OF H2S AND H2O, INJECTING AN OXYGEN-CONTAINING STREAM INTO SAID GASEOUS STREAM OF H2S AND H2O TO THEREBY REACT OXYGEN WITH THE H2S AT A TEMPERATURE OF ABOUT 2000* TO 2700*F. TO FORM H2O AND SULFUR, AND THEN RECOVERING SAID SULFUR.
References Cited (Backward Citations)
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |