Sulpuric acid contact process
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Contact process, modern industrial method of producing sulfuric acid; it has largely replaced the chamber, or lead-chamber, process. ... Sulfur dioxide and oxygen, passed over a hot catalyst, unite to form sulfur trioxide, which in turn combines with water to make sulfuric acid.
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The contact process is the current method of producing sulfuric acid in the high concentrations needed for industrial processes. Platinum was initially used as the catalyst for this reaction; however, as it is susceptible to reacting with arsenic impurities in the sulfur feedstock, vanadium(V) oxide is now preferred.
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