Method for forming a catalyst article

A method for forming a catalyst article comprising:

• (a) forming a plastic mixture by mixing together at least the following components:
• (i) a crystalline small pore or medium pore molecular sieve in an H+ or NH4+ form;
• (ii) an insoluble active metal precursor;
• (iii) an inorganic matrix component;
• (iv) an organic auxiliary agent;
• (v) an aqueous solvent;
• wherein the mixture has a solids content of greater than 50% by weight;
• wherein the insoluble active metal precursor is selected from the group consisting copper carbonate, manganese carbonate, nickel carbonate, cobalt carbonate, iron carbonate, palladium carbonate, platinum carbonate, cerium carbonate, yttrium carbonate, niobium carbonate, lanthanum carbonate, zinc carbonate, zirconium carbonate, calcium carbonate, magnesium carbonate, manganese hydroxide, nickel hydroxide, cobalt hydroxide, iron hydroxide, palladium hydroxide, platinum hydroxide, cerium hydroxide, yttrium hydroxide, niobium hydroxide, lanthanum hydroxide, zinc hydroxide, zirconium hydroxide, calcium hydroxide, manganesium hydroxide, copper oxalate, calcium oxalate, iron oxalate, manganese oxalate, cobalt oxalate, cerium oxalate, yttrium oxalate, zinc oxalate and any mixture of two or more thereof;
• and,
• wherein step (a) is carried out at a temperature in the range 10 to 35° C.;
• (b) moulding the plastic mixture into a shaped article;
• and
• (c) calcining the shaped article to form a solid catalyst body.