To the heteropolyacids, in particular of the acids molybdovanadophosphoriques, which are useful as a catalyst

摘要

P the invention relates to a process for preparing heteropolyacids. / p & & p & heteropolyacids are prepared which are suitable as components of various oxidation catalysts by subjecting to a hydrothermal reaction, an aqueous suspension containing an oxide and / or a oxyacid respectively moblydène, vanadium and phosphorus, and possibly an oxide and / or tungsten oxyacid. / p & & p & the invention makes it possible in particular the preparation of a simple and practical molybdovanadophosphoriques very effective as catalysts. / p