Process for elimination of ammonia and hydrogen sulfide from gases generated in coke plants and gas works
Abstract
Abstract THE PROCESS OF THE INVENTION RELATES TO A MULTISTAGE PROCESS FOR COMPLETELY ELEMINATING AMMONIA AND HYDROGEN SULFIDE FROM COKE OVEN GASES, THEIR CONDENSATES, DESORPTION GASES OR DAMP VAPORS. THIS IS ACCOMPLISHED BY THE COMBUSTION OF AMMONIA SO AS TO FORM NITROGEN AND WATER, AND THE COMBUSTION OF HYDROGEN SULFIDE TO FORM ELEMENTARY SULFUR IN A NOVEL MULTISTAGE PROCESS IN WHICH THE AIR, NECESSARY FOR SUSTAINING THE COMBUSTION, IS ADDED TO THE ABOVE GASES AND VAPORS IN SEVERAL, PREFERABLY TWO, COMBUSTION STAGES AND THE GASES FROM THE COMBUSTION STAGES ARE LIKEWISE COOLED IN AT LEAST TWO STAGES, WITH AT LEAST ONE COOLING STAGE FOLLOWING THE FIRST COMBUSTION STAGE, AND AT LEAST A SECOND COOLING STAGE FOLLOWING THE SECOND COMBUSTION STAGE. HIGH PRESSURE STEAM IS OBTAINED AS A BY-PRODUCT FROM THE PROCESS. THE DECOMPOSITION OF NH3 IN THIS PROCESS IS COMPLETE, LEADING TO GENERATION OF NITROGEN AND WATER, WHICH ARE WORKED UP SEPARATELY, WHILE H2S AND SO2 THE LATTER FORMED DURING THE PROCESS, ARE USED FOR THE RECOVERY OF ELEMENTARY SULFUR.
Inventors
- 👤 G Wunderlich
- 👤 H Weber
- 👤 G Choulat
- 👤 D Laufhutte
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |