Carl Still process

A commercial application of the Carl Still process (predecessor to the Still Otto process) is described by Snook (1977). The plant, which is located at the ARMCO Steel Corporation in Middletown, Ohio, uses a circulating solution contaiiiing 2 wt% ammonia, and reduces the hydrogen sulfide content of die coke-oven gas from 350 to 50 grains per 100 scf. At the ARMCO plant the anunonia is removed from the acid gas with the Phosam process, and the remaining add gases are fed to a sulfuric add plant... 

Carl Still (2) A process for removing hydrogen sulfide from coke oven gas by scrubbing with aqueous ammonia, itself derived from coke oven gas. Developed in the 1970s by Firma Carl Still, Germany. Operated at the ARMCO steel mill at Middleton, OH. See also Diamox, Still. 

Still Otto A process for removing hydrogen sulfide from coke-oven gas by scrubbing with aqueous ammonia. Developed from the Carl Still (2) process. 

Under normal conditions the yield is very low. Haber (1907-09) showed that practical yields could be achieved at high temperatures (250°C) and pressures (250 atmospheres) using a catalyst (iron is the catalyst now used). The process was developed industrially by Carl BOSCH around 1913 and is still the main method for the fixation of nitrogen. Haber received the Nobel Prize for chemistry for this work in 1918. 

Carolus Lirmaeus (Carl von Linne, 1707 1778) was a Swedish biologist who classified all plants and animals and assigned a two-word Latin name to each organism (the so alled binomial scientific nomenclature). He coined the term Homo sapiens (which means wise man ), the species which evolved finm Homo stupidus (the process that may still be in progress ). 

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