Patent ID: 6152972
Filing Date: 2000-11-28
Classification: C10L

Abstract:
A gasoline additive for the three-way catalytic conversion of gasoline combustion engine emission, the additive comprising at least one compound of a three-way metal catalyst selected from the group consisting of noble metals and non-noble metals, wherein each noble metal catalyst is directly soluble in gasoline in a concentration of about 0.01 to about 10 mg/l and each non-noble metal catalyst is directly soluble in gasoline in a concentration of about 10 to about 100 mg/l, the metal catalyst of the additive being capable of being deposited on a surface of a catalytic vessel located downstream of a combustion chamber and of effecting simultaneous oxidation of carbon monoxide and unburned hydrocarbons and reduction of nitrogen oxides, the additive comprising a mixture of X.sub.2 PtCl.sub.6, RhCl.sub.3 and XReO.sub.4 where X is selected from the group consisting of potassium, rubidium or cesium.