NOVELTY - Converting fatty acids to paraffinic hydrocarbons, comprises: contacting carboxylic acid reactants (I) with catalyst over support; and isolating paraffinic hydrocarbon products from other reaction products, where basicity of the catalyst is at least 0.1 milliequivalents. The catalyst is e.g. nickel or platinum-copper, and support is hydrotalcite, magnesium oxide, calcium oxide, mixed oxide of ceria-zirconia, or lanthanum oxide. The carboxylic acid reactants are derived from feed-stock comprising plant oils, animal fats, animal oils, algae oils, and oils from heterotrophic microbial organisms.    USE - The process is useful for converting fatty acids to paraffinic hydrocarbons (claimed), where the paraffinic hydrocarbon product is useful as aviation turbine fuel, gasoline, and in formulation for solvent, degreaser, and cleaning fluid (all claimed), and in production of petrochemicals.    ADVANTAGE - The process provides: the mixture that is used as aviation gas having octane rating of at least 100 and a boiling point of 20-175 degrees C, and has tetraethyl lead content no greater than 0.53 ml/l, and satisfies American society for testing and materials (ASTM) standard D7719; and provides the cleaning fluid that has flash point above 140 degrees F and volatile organic content of no greater than 25 g/l. The paraffinic hydrocarbon product: has boiling point of 35-200 degrees C, and satisfies American society for testing and materials D4814-111B; is capable of being converted to chlorinated paraffin having an average carbon chain length of at least 14 carbons; is used as aviation turbine fuel that satisfies American society for testing and materials (ASTM) standard D7566 (all claimed).    DETAILED DESCRIPTION - Converting fatty acids to paraffinic hydrocarbons, comprises: contacting carboxylic acid reactants with catalyst over support; and isolating paraffinic hydrocarbon products from other reaction products. The carboxylic acid reactants are of formula (R-COOH) (I), where basicity of the catalyst is at least 0.1 milliequivalents. The catalyst is platinum, palladium, nickel, nickel-molybdenum, nickel-tungsten, or platinum-copper, and the support is hydrotalcite, magnesium oxide, calcium oxide, mixed oxide of ceria-zirconia, or lanthanum oxide. The carboxylic acid reactants are derived from feed-stock comprising plant oils, animal fats, animal oils, algae oils, and oils from heterotrophic microbial organisms.    R = at least 6 and no more than 24C.    INDEPENDENT CLAIMS are also included for:    (1) the paraffinic hydrocarbon product formed by the process, where weighted average chain length of the paraffinic hydrocarbon products is greater than 80% the weighted average chain length of the carboxylic acid feedstock; and    (2) a mixture comprising at least one paraffinic hydrocarbon product and at least one monocyclic aromatic hydrocarbon which is benzene, toluene, or xylene.    (3) a process for converting fatty acids to olefinic hydrocarbons