Mannheim
Mannheim : (1) A process for making hydrochloric acid by roasting sulfuric acid and sodium chloride together in a closed cast iron furnace equipped with a plough. The byproduct sodium sulfate, known as salt cake, may be recrystallized after neutralization and filtration, and used as a detergent ingredient. A potassium variant is used in those locations where native potassium chloride can be found. (2) An early version of the Contact process for making sulfuric acid. Two catalysts were used: ferric oxide, followed by platinum. The first Mannheim plant was built in Buffalo, NY, in 1903
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