Fumaks process

The Fumaks process removes approximately 95% of the H2S content of coke-oven gas in a single scrubbing stage. Ammonia is a better reagent than soda ash for the process since it produces less byproduct thio.sulfate. The sulfur recovery yields are 85% with ammonia and only 70% with soda ash. The sulfur is precipitated as tiny (1-2 p in diam.) rhombic sulfur... 

Chemicai Consuinption/Ulility Requbements oMhe Fumaks Process... 

Fumaks A process for removing hydrogen sulfide from coke-oven gas by oxidation with picric acid. Developed by Sumitomo Metals Industries, and used in 11 units in Japan from 1972 to 1997. 

Fu maks-Rhodaks A combination of the Fumaks and Rhodaks processes for removing both hydrogen sulfide and hydrogen cyanide from coke-oven gas. Developed by the Osaka Gas Company and marketed by Sumitomo Chemical Engineering Company. 

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