Abstract: The oxidative properties of lubricants, especially lubricating oils and greases, are improved by adding thereto an oxidation inhibiting amount of a diarylamine ortho-carboxamide.

Abstract: Catalysts capable of desulfurizing organo-sulfur compounds particularly those normally found in petroleum compositions, such as thiophene, are prepared from metal-containing compounds of metals of Groups VIB and VIII of the Periodic Table on a refractory support or base. Of particular interest are catalysts containing components of cobalt and molybdenum oxides on alumina which preparation utilizes dimethyl sulfoxide (DMSO). The use of such catalysts provides increase of conversion rate-constants of desulfurization reactions. A process of treating the base and the base material obtained from such process are also disclosed herein.

Abstract: The lead content of gasolines, particularly in concentrations of from 0.00 to 0.10 gram of lead per U.S. gallon of gasoline, is determined colorimetrically by mixing iodine and tetraorganoammonium halide solution with the gasoline, subjecting the mixture to ultraviolet light or heat, agiating the mixture with ammonium nitrate or nitric acid, passing the aqueous phase into 4-(2-pyridylazo)-resorcinol disodium and comparing the resulting color with a standard color scale or a colorimeter to determine the initial lead concentration.