Abstract: Useful thionamide compounds are prepared by reacting sulfur with imines of the structural formula: ##STR1## where R is an alkyl group of 1 to 18 carbon atoms and is other than a phenyl or cyclohexyl group, R.sub.1 and R.sub.2 are alkyl or phenyl groups of 1 to 18 carbon atoms, and R.sub.3 is a phenyl group of 6 to 18 carbon atoms or is hydrogen, in the presence of a diol or triol compound. The total number of carbons in R, R.sub.1, R.sub.2, and R.sub.3 does not exceed 36 in number.

Abstract: Oxalyl compounds and polyalkylene polyamine derivatives of ethylene diamine and higher homolog polyamines are reacted to form a reaction product. This product is useful as an antifouling agent in the water systems of boiler and scrubbers, and particularly the quenching waters of blast furnaces.

Abstract: Diones and alkylamino derivatives of ethylene diamine and higher homolog polyamines are reacted to form an intermediate reaction product. This product subsequently is reacted with alkyl or alkenyl succinic anhydride to produce a dispersant for use in lubricants.

Abstract: Disclosed are additives for hydrocarbon fuels which are the reaction products of a polyamine and an alkyl ester of acrylic or alkyl acrylic acid. A preferred composition is a mixture of the reaction product and oxygenated or non-oxygenated mono- or polyamines.

Abstract: Disclosed is a reaction product and method for making same for use in supressing the ability of solubilized copper, iron, cobalt, nickel, chromium and manganese present in hydrocarbon liquids, such as gasoline and fuel oil, to catalyze oxidative degradation. The reaction product is obtained by reacting a 1,2-alkane diamine, a 2,4-dione and an ortho-hydroxy aromatic aldehyde, in stoichiometric proportions, preferably in an inert liquid medium. A preferred reaction product is that obtained by reacting ethylenediamine, 2,4-pentanedione and salicylaldehyde in a 1 to 1 to 1 mole ratio.

Abstract: Disclosed is a reaction product and method for making same for use in suppressing the ability of solubilized copper, iron, cobalt, nickel, chromium and manganese present in hydrocarbon liquids, such as gasoline and fuel oil, to catalyze oxidative degradation. The reaction product is obtained by reacting 1,2-alkane diamine, a 2,4-dione and an ortho-hydroxy aromatic aldehyde, in stoichiometric proportions, preferably in an inert liquid medium. A preferred reaction product is that obtained by reacting ethylenediamine, 2,4-pentanedione and salicylaldehyde in a 1 to 1 to 1 mole ratio.

Abstract: Disclosed is a reaction product and method for making same for use in suppressing the ability of solubilized copper, iron, cobalt, nickel, chromium and manganese present in hydrocarbon liquids, such as gasoline and fuel oil, to catalyze oxidative degradation. The reaction product is obtained by reacting a 1,2-alkane diamine, a 2,4-dione and an ortho hydroxy aromatic aldehyde, in stoichiometric proportions, preferably in an inert liquid medium. A preferred reaction product is that obtained by reacting ethylenediamine, 2,4-pentanedione and salicylaldehyde in a 1 to 1 to 1 mole ratio.