Loss of Activity by Vanadium Sulfuric Acid Catalysts under the Action of Arsenic(Ⅲ) Oxide Vapor

摘要

Chemical processes leading to inactivation of vanadium sulfuric acid catalysts by arsenic(Ⅲ) oxide vapor were studied. The interaction and solubility in the system VO(H_2AsO_4)_2-VOAsO_4-H_3AsO_4-H_2O and the composition of oxovanadium arsenate in a mixed oxidation state, used as a starting substance in synthesis of (V~ⅣO)(V~ⅤO)_2(As_2O_7)_2, were examined.