CATALYST FOR CONTROL OF AUTOMOBILE EXHAUST EMISSIONS

摘要

A process for preparing an automotive exhaust catalyst capable of converting the carbon monoxide and hydrocarbons in automobile exhaust gas to carbon dioxide and water, characterized by high activity and exceptional resistance to shrinkage in use. The catalyst is prepared by impregnating or cladding nodules of a support with certain transition metal oxides. One of these oxides is impregnated into or clad onto the support and the support is calcined prior to addition of the other catalytic components to the nodules.