AMINO AND IMINO PROPIONIC ACIDS, PROCESS OF PREPARATION AND USE

摘要

N-alkyl, N-alkenyl, N-cycloalkyl, N-aryl amino or imino propionic acids with an alkyl chain ranging from 6 to 18 carbons, or alkenyl chain from 8 to 30 carbons, are obtained from a reaction process in the absence of solvent at a temperature range from 30 to 180° C. and a time of 1 to 10 hours at atmospheric pressure. Formulations composed of N-alkyl or N-alkenyl or N-cycloalkyl or N-aryl amino or imino propionic acids, polyethers derived from propylene oxide or ethylene oxide or copolymer thereof and a solvent consisting of aromatic compounds such as toluene or xylene, diesel or gasoline or alcohols such as isopropanol and ethanol, or mixtures thereof, are obtained inhibit ferrous metal corrosion of pipelines and storage tanks and transport crude oil and liquid fuels. A method inhibiting corrosion of ferrous metals adds an effective amount of the corrosion inhibitor to a petroleum based material such as crude oil and liquid fuels such as gasoline, diesel fuel, and aviation fuel.

主权项

1. A process for obtaining N-alkyl, N-alkenyl, N-cycloalkyl, N-aryl amino or imino propionic acids from a reaction that takes place in the absence of solvent and at atmospheric pressure, said process comprising reacting an alkyl, alkenyl, cycloalkyl or aromatic amine of formula I with an alpha-beta unsaturated carboxylic acid of formula II according to the following synthesis scheme (3) to obtain the compounds of formula III and/or IVthe reaction being carried out at a temperature range of 50 to 180° C. and a reaction time between 1 and 10 hours, where R is a linear or branched alkyl or aryl group having 1 to 30 carbon atoms or a cyclic alkyl or aryl group having 5-12 carbon atoms, R1 is H or —CH3 and R2 is H.