Staatsmijnen-Otto


Staatsmijnen-Otto : Also known as the Pieters process, after the inventor, H. A. J. Pieters. A process for removing hydrogen sulfide from coal gas by scrubbing with an aqueous solution containing a suspension of iron cyanide complexes known as iron blue. The product is elemental sulfur, which separates as a froth and is purified by heating with water in an autoclave. Staatsminjen is a Dutch producer of smokeless fuels which has also given its name to a briquetting process
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