Abstract: Disclosed herein are compounds of the general formula ##STR1## wherein x and y are integers from 3 to 9, x and y together equal 12, one Z is hydrogen and the other Z is a carboxylic acid group, and R.sub.1 and R.sub.2 are fatty acid groups. A process for introducing approximately one carboxylic acid group per triglyceride molecule in vegetable oils has been developed, and the resulting acid adduct forms soaps with attractive properties. The process comprises first conjugation of the double bonds of the nonconjugated polyunsaturated groups present in the fatty acid ester and elaidinization with a catalyst, such as iodine, and then adduct formation with acrylic acid to form the compounds of the general formula. This process also greatly stabilizes the triglyceride against atmospheric oxidation and polymerization reactions.

Abstract: There is disclosed a process for the recovery of fatty acids and rosin acids from tall oil soap by acidification of crude soap with carbon dioxide in the presence of a water-immiscible solvent.

Abstract: 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.