Process for the manufacture of sulfur or sulfuric acid from coke oven gas

Abstract

Abstract A PEOCESS IS DESCRIBED FOR THE COMPLETE ELIMINATION OF AMMONIA AND HYDROGEN SULFIDE FROM COKE OVEN GASES, IN WHICH THE GASES ARE SCRUBBED WITH WATER AND THE AQUEOUS NH3-SOLUTION IS RECYCLED AND THE LADEN WATER AND AQUEOUS NH3-SOLUTION IS DESORBED WITH STREAM OR WITH EITHER COMBUSTIBLE OR NON-COMBUSTIBLE GASES IN A DEACIDIFICATION PROCESS, THEREAFTER ENRICHED NH3 AND H2S IN THE DESORPTION GASES OR DAMP VAPORS, AND SCRUBBING, THE GASES WITH WATER AND RECYCLING; THE DAMP VAPORS ARE BURNED WITH SUFFICIENT AIR FOR CONVERTING AMMONIA TO NITROGEN AND WATER, AND OBTAINING ELEMENTRY SULFUR OR SULFURIC ACID FROM THE HYDROGEN SULFIDE. IN THE PROCESS, THE DAMP VAPORS RECOVERED FROM THE DEACIDIFICATION ARE DIVIDED INTO TWO FRACTIONS, ONE CONTAINING AMMONIA ESSENTIALLY FREE FROM HYDROGEN SULFIDE AND THE OTHER CONTAINING HYDROGEN SULFIDE ESSENTIALLY FREE FROM AMMONIA, AND THE TWO FRACTIONS ARE BURNED SEPARATELY, AFTER WHICH THE CONDENSATE IS SEPARATED FROM THE GASEOUS COMBUSTION PRODUCT STREAMS AND THE TWO STREAMS COMBINED, WHEREBY THE TEMPERATURE AND/OR CONCENTRATION OF THE GASES IS ADJUSTED BEFORE BEING PROCESSED FURTHER.

Inventors

• 👤 H Weber
• 👤 G Wunderlich

Bibliographic Details