Process for purifying crude coke-oven gases
Abstract
Abstract A PROCESS FOR PURIFYING CRUDE COKE OVEN GASES INCLUDES THE STEPS OF FLOWING COOLED AND DETARRED CRUDE GAS UPWARDLY IN A THREE-STAGE GAS SCRUBBER, THE TOP STAGE OF WHICH IS CHARGED WITH CRUDE AMMONIA LIQUOR CONDENSATE ACCUMULATING FROM PRIOR COOLING OF THE GAS. THE AQUEOUS EFFLUENT OF THE THIRD WASHING STAGE IS DELIVERED TO THE TOP OF THE BOTTOM OR FIRST WASHING STAGE WHILE THE MIDDLE OF SECOND WASHING STAGE IS TREATED WITH DEACIDIFIED RECYCLE WATER. THE AQUEOUS EFFLUENT ACCUMULATING IN THE FIRST AND SECOND WASHING STAGES ARE SEPARATELY INTRODUCED INTO A DISTILLATION COLUMN IN SUCH A WAY THAT EACH RECEIVES A DIFFERENT TREATMENT, BUT THE RESULTING LIQUID, AFTER AT LEAST PARTIAL DEACIDIFICATION, IS PUMPED BACK TO THE SECOND WASHING STAGE.
Inventors
- 👤 Paul Radusch
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |