Patent ID: 6790806
Filing Date: 2004-09-14
Classification: B01J,Y10S,Y10T

Abstract:
A core/jacket catalyst molding having a core made from an inorganic support material and with a jacket made from a catalytically active material, which is the product of the process of:coextruding an aqueous molding composition which comprises the support material or a precursor thereof, with an aqueous molding composition which comprises the catalytically active material or a precursor thereof, wherein an arrangement of two extruders is selected for the preparation process so that during the extrusion process a jacketing phase made from catalytically active material concentrically surrounds a compact core made from support material, then drying the coextrudate, and then calcining the dried coextrudate; and wherein the aqueous molding composition which comprises the support material or comprises a precursor thereof comprises a mixture made from10-30% by weightof at least one water-soluble binder,25-50% by weightof at least one inorganic support materialor precursor thereof,â€‚2-20% by weightof at least one peptizing agent,â€ƒ1-5% by weightof at least one plasticizer,20-60% by weightof water,where the total amount of ingredients gives 100% by weight.