PROCEDIMIENTO PARA LA OBTENCION DE UN CATALIZADOR, CONSTITUIDO POR UN CUERPO SOPORTE Y UNA MASA DE OXIDO CON ACTIVIDAD CATALITICA APLICADA SOBRE LA SUPERFICIE DEL CUERPO SOPORTE

UN PROCEDIMIENTO PARA LA ELABORACION DE UN CATALIZADOR, QUE SE APLICA A PARTIR DE UN CUERPO SOPORTE Y SOBRE LA SUPERFICIE DEL CUERPO SOPORTE, SE COMPONE DE MASAS DE OXIDO ACTIVAS CATALITICAMENTE. EL CUERPO SOPORTE SE HUMEDECE CON UNA SOLUCION ACUOSA CON PROPIEDADES DE EBULLICION EN PRESION NORMAL POR ENCIMA DE 100 NCIA Y SE APLICAN EN CONTACTO A CONTINUACION CON MASAS DE OXIDO SECO, EN APLICACION ACTIVA FINA EN LA SUPERFICIE DEL CUERPO SOPORTE HUMEDECIDO, DONDE SE ADHIERE UNA CAPA DE MASA DE OXIDO ACTIVO Y A CONTINUACION SE RECUBRE CON LIQUIDO DE ADHERENCIA A PARTIR DE LA MASA DE OXIDO ACTIVO, ELIMINANDOSE EL CUERPO SOPORTE HUMEDECIDO. A catalyst having a catalytically active oxide on the surface of a carrier is mfd. by moistening the carrier with a liq. binder consisting of a soln. of 10-80 wt.% of organic binder dissolved in 20-90 wt.% of H2O, contacting its surface with finely divided oxide particles, and removing the binding agent. The organic binder has a b.pt. or sublimation temp. of > 100 degrees C at atmos. pressure. Also claimed are: (i) a shell catalyst consisting of a hollow cylinder carrier 2-10 mm long with an external dia. 4-10 mm and a 1-4 mm wall thickness coated on its external surface with an oxide of general formula Mo12VaX bX cX dX eX fX6gOn in which, X is W, Nb, Ta, Cr and/or Ce, X is Cu, Ni, Co, Fe, Mn and/or Zn, X is Sb and/or Bi, X is 1 or more alkali metals, X is 1 or more alkaline earth metals, X is Si, Al, Ti and/or Zr and a = 1-6, b = 0.2-4, c = 0.5-18, d = 0-40, e = 0-2, f = 0-4, g = 0-40 and n is a number determined by the valency and the abundance of the different elements in the general formula. The thickness of oxide is 10-1000 mu m, the specific active surface is 20-30 m /g and a value of < 0.5 wt.% is obtd. in a rotating table attrition test; and (ii) a shell catalyst of similar dimensions and final physical properties of general formula Mo12BiaFebX cX dX eX fOn in which, X is Ni and/or Co, X is Tl, an alkali metal and/or an alkaline earth metal, X is P, As, B, Sb, Sn, Ce, Pb, Nb and/or W, X is Si, Al, Ti and/or Zr and a = 0.5-5, b = 0.01-3, c = 3-10, d = 0.02-2, e = 0-5, f = 0-10 and n is a number determined by the valency and the abundance of the different elements in the general formula.