METHOD OF OBTAINING LONG-CHAIN S-ALKYL ETHERS OF O,O-DIALKYLDITHIOPHOSPHORIC ACIDS, POSSESSING ANTICORROSION ACTIVITY Russian patent published in 2008 - IPC C07F9/165 C23F11/10 

FIELD: chemistry.

SUBSTANCE: invention relates to technology of phosphoroorganic substances, namely, to method of obtaining long-chain S-alkyl ethers of O,O-dialkyldithiophosphoric acids of general formula (I), possessing anticorrosion activity. Described is method of obtaining long-chain S-alkyl ethers of O,O-dialkyldithiophosphoric acids of general formula (I) , where alkyl=C₁₆-C₁₈; C₂₀-C₂₆ R=ethyl, isobutyl, isoalkyl, by interaction of O,O-dialkyldithiophosphoric acid with higher α-olefins of industrial fraction C₁₆-C₁₈ or C₂₀-C₂₆ in molar ratio 1:(1-1.5), in medium of acetonitryl or in absence of solvent, at 70-90°C during 2-5 hours, in presence of catalytic amounts of zinc chlorides, nickel (II) or iron (III) with further isolation of target products by known methods. Invention can be applied in different branches of industry, in particular, for protection of pipelines, reservoirs, construction metallic structures, equipment for extraction, transportation and processing oil and gas, in metal processing.

EFFECT: creation of efficient method of obtaining long-chain S-alkyl ethers of O,O-dialkyldithiophosphoric acids, possessing anticorrosion activity.

3 cl, 1 tbl, 7 ex