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出典:Wiktionary
出典:『Wiktionary』 (2017/02/05 18:55 UTC 版)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/25 22:14 UTC 版)
The contact process is the current method of producing sulfuric acid in the high concentrations needed for industrial processes. Platinum was formerly employed as a catalyst for the reaction, but as it is susceptible to poisoning by arsenic impurities in the sulfur feedstock, vanadium(V) oxide (V2O5) is now preferred.