Multifonctional catalysts which contain cerium, uranium and at least a metal for converting pollutants from exhaust gases of combustion engines, and their preparation

• Main Authors: COURTY, PHILIPPE, DURAND, DANIEL, MABILON, GIL, DOZIERE, RICHARD
• Format: Patent
• Language: English; French; German
• Published: 05.01.1994
• Edition: 5
• Subjects: BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

A multifunctional catalyst containing cerium, uranium and at least one metal, for the conversion of the contaminants emitted by internal combustion engines, and their preparations. … This catalyst comprises a porous layer containing… - from approximately 20% to approximately 99% of at least one refractory oxide… - from approximately 0.8% to approximately 70% of at least one cerium oxide,… - from approximately 0.1% to approximately 50% of at least one uranium oxide,… - from approximately 0.1% to approximately 20% of a metal chosen from the group made up of Pt, Rh, Pd, Ru, Ir, Au and mixtures thereof. … Application to the catalytic exhaust industry.