HYDROGEN SULPHIDE AND/OR LOW-MOLECULAR MERCAPTAN REMOVER AND METHOD OF USING IT Russian patent published in 2009 - IPC C10G29/20 C02F1/58 B01D53/14 C07D263/04 C07C217/08 C07C217/04 E21B43/22 

FIELD: chemistry.

SUBSTANCE: proposed hydrogen sulphide and/or low-molecular mercaptan remover is in form of amino esters with general formula: (R-)_nN(-CH2-O-R')_m, where R is alkyl, isoalkyl C₁-C₁₄ or cyclohexyl, or benzyl, or a bivalent group with formula - CH₂-O-CH₂-CH₂-, bonded to a nitrogen atom of an amino ester, with formation of five-member heterocyclic ring; R' - alkyl, isoalkyl or alkenyl, preferably C₁-C₄; n=1 or 2, m=3-n. The invention also pertains to the method of purifying oil, water-oil emulsions, oil products, hydrocarbon gases, stratal water and process liquids from hydrogen sulphide and/or low-molecular mercaptans by treating the starting material using the above described remover. The proposed remover and a composition based on it have higher reaction capacity compared to hydrogen sulphide, light mercaptans and provides for their effective neutralisation in aqueous and non-aqueous media at normal and high temperatures (10-90°C and above). The proposed remover also has bactericidal activity towards sulphate reducing bacteria and anti-corrosion activity in hydrogen sulphide-containing media, and can be used as a bactericide-inhibitor of hydrogen sulphide corrosion in oil-field media.

EFFECT: improved properties of the remover.

4 cl, 9 ex