Westvaco Corporation

Benjamin F Ward

Carlton G Force

William G Vardell

Disclosed herein are additives for petroleum hydrocarbons, e.g., gasoline, oil, and solvents, to inhibit corrosion or rusting of metals. The additives comprise a major amount of a liquid C.sub.21 -dicarboxylic acid having the following structure, the bis-alkanolamide derivative of this material, the mono-alkanolamide derivative of this material, or the salt of the monoalkanolamide derivative of this material: ##EQU1## wherein x and y are integers from 3 to 9, x and y together equal 12 and Z is a member of the group consisting of hydrogen and COOH, with one Z of each moiety. An additional aspect of the subject invention is that the C.sub.21 -dicarboxylic acid of the formula shown above may be blended with up to 80% by weight of such fatty acids as oleic acid, coconut fatty acid, soya fatty acid, tall oil fatty acids and others and still retain significant corrosion inhibiting properties. The alkanolamides are made by reacting the dicarboxylic acid or its sodium or potassium soap and monoethanolamine, diethanolamine or isopropanolamine.

Corrosion inhibiting compositions and process for inhibiting corrosion

There is provided by way of this invention diglycidyl esters of C.sub.21 -dicarboxylic acid represented by the structural formula ##EQU1## wherein x and y are integers from 3 to 9, x and y together equal 12, and Z is a member of the group consisting essentially of ##EQU2## and hydrogen with one Z of each moiety.

Diglycidyl esters of C.sub.21 -cycloaliphatic dicarboxylic acid

Disclosed herein are high solids content liquid polycarboxylic acid soaps made from long chain fatty acids and fatty oils by reaction with a maleinizing agent. This addition reaction is performed at a temperature between 180.degree.C. and 300.degree.C. preferably 190.degree.C. and 220.degree.C., between fatty acids and fatty oils from soya oil, tallow, corn oil, linseed oil, sunflower oil, tung oil, and tall oil fatty acids with maleyl compounds such as maleic anhydride. These addition reaction products when converted to soaps, such as potassium, sodium and ammonium, have a solubility uniquely above that noted before. The invention also includes mixtures of blends of the polycarboxylic acids with fatty acids and oils.

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Charleston, SC, United States of America

Benjamin F Ward