METHOD FOR THE PREPARATION OF HIGH ACTIVITY PHOSPHOMOLYBDIC ACID BASED CATALYSTS

摘要

Abstract of the DisclosureThe present invention relates to a method for thepreparation of phosphomolybdic acid based catalysts by forminga solution of hydrated phosphomolybdic acid in a substantiallyanhydrous alkyl alcohol, optionally adding a base to the solution,evaporating the solution to yield a catalyst powder andthereafter drying and calcining the powder to form the activecatalyst. A second method for preparation is also provided andincludes the steps of forming a solution of hydratedphosphomolybdic acid in a substantially anhydrous alkylalcohol evaporating the solution to form a concentrate,impregnating a catalyst support material with the concentrate,contacting the impregnated support with ammonia gas in anamount sufficient to form an insoluble precipitate of ammoniumalkyl phosphomolybdic acid within the pore structure of saidsupport material and thereafter drying and calcining saidimpregnated support material so as to form a coated catalyst.