Exhaust gas cleaning catalysts and method of producing same

Patent · Tue Feb 17 00:00:00 EST 1976

OSTI ID:7348125

Takeoka, S; Inaba, H; Ichiki, M

Exhaust gas cleaning catalysts are produced by alloying copper and aluminum with at least one of the elements, nickel and chromium, and eluting by alkali or acid means aluminum from the cooled alloy surface. Small amounts of other metals from the fourth or fifth period V--VIII groups may be added to the catalysts by alloying, or by impregnation, for enhanced catalytic properties. The catalysts exhibit improved reduction of NO and oxidation of CO in an exhaust gas stream, in the presence of Pb, SO/sub 2/, moisture and hydrocarbons (HC) and at relatively low temperatures.

• Assignee: Hitachi Shipbuilding and Engineering Co., Ltd.
• Patent Number(s): US 3939097
• OSTI ID: 7348125
• Resource Relation: Patent Priority Date: Priority date 7 Dec 1972, Japan
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
54 ENVIRONMENTAL SCIENCES
AUTOMOBILES
CATALYTIC CONVERTERS
CATALYSTS
INDUSTRIAL PLANTS
ALUMINIUM ALLOYS
CARBON MONOXIDE
CHEMICAL COMPOSITION
COPPER ALLOYS
FABRICATION
NITRIC OXIDE
PERFORMANCE TESTING
TEMPERATURE DEPENDENCE
ALLOYS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
EQUIPMENT
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
TESTING
VEHICLES
330701* - Emission Control- Nitrogen Oxides
330702 - Emission Control- Carbon Monoxide
500100 - Environment
Atmospheric- Basic Studies- (-1989)