CATALYTIC NEUTRALIZER AND METHOD OF PRODUCTION OF SUCH NEUTRALIZER (VERSIONS) Russian patent published in 2005 - IPC

FIELD: production of catalytic neutralizers.

SUBSTANCE: high-efficiency catalytic neutralizer has internal and external layers on inert carrier which contain noble metals of platinum group deposited on materials of base and oxygen-accumulating components. Inner layer of proposed catalytic neutralizer contains platinum deposited on first base and first oxygen-accumulating component and its external layer contains platinum and rhodium deposited on second base only; this second layer contains additionally second oxygen-accumulating component. Production of catalytic neutralizer includes application of coat on carrier made from composition containing powder-like materials including first material of base and first oxygen-accumulating component followed by drying, calcining, immersing the carrier with coat in solution of platinum precursor; coat is calcined and external layer is applied over previous layer. Specification describes two more versions of production of catalytic neutralizer.

EFFECT: enhanced ability of catalytic neutralizer for reduction of catalytic activity after aging due to discontinuation of delivery of fuel.

24 cl, 1 dwg, 11 tbl, 5 ex, 3 ex