Patent ID: 8637417

Claim:
A method for treating a catalyst base, wherein the catalyst base comprises at least one contact area of a porous material, and wherein a fluid is adapted to be conducted along said contact area, the method comprising the steps of: introducing at least one catalytically relevant substance into pores of the catalyst base comprising ceramic, titanium dioxide, or zeolite by means of a transport fluid; wherein said step of introducing at least one catalytically relevant substance comprises: immersing the catalyst base in an immersion bath of the transport fluid free of the at least one catalytically relevant substance until the catalyst base is soaked; subsequently adding the at least one catalytically relevant substance to the immersion bath of the transport fluid, whereby the at least one catalytically relevant substance is dissolved in the transport fluid; keeping the catalyst base in the immersion bath for a predetermined period of time so that the at least one catalytically relevant substance diffuses into pore system's regions close to the contact area having a lower pore depth but has not diffused to regions of the pore system having a greater pore depth; and removing the catalyst base from the immersion bath; and removing the transport fluid, wherein the at least one catalytically relevant substance remains on pore wall areas after removal of the transport fluid, wherein said step of introducing at least one catalytically relevant substance is carried out in such a way that, in at least a plurality of pores, an amount of the at least one catalytically relevant substance relative to the contact area remaining on the pore wall areas is a function of location within each pore such that the amount of the at least one catalytically relevant substance relative to the contact area decreases within the pore after exceeding a specific pore depth; and heat treating the at least one catalytically relevant substance to convert the at least one catalytically relevant substance to at least one catalytically active substance selected from the group consisting of tungsten oxide, vanadium pentoxide, molybdenum oxide, copper oxide, and iron oxide.