OXYETHYLATED ALKYL- (OR PHENOL)METHYL- OR ETHYL PHOSPHITES OF N-METHYL- OR ETHYLALKYLAMMONIUM AS CORROSION INHIBITORS POSSESSING BACTERICIDAL ACTIVITY WITH RESPECT TO SULFATE-REDUCING MICROORGANISMS Russian patent published in 2007 - IPC C07F9/141 C23F11/167 A01N57/04 A01N57/06 

FIELD: chemistry of organophosphorus compounds.

SUBSTANCE: invention relates to nitrogen- and phosphorus-containing compounds. Invention describes oxyethylated alkyl- (or phenol)methyl- or ethyl phosphites of N-methyl- or ethylalkylammonium of the general formula: , wherein R means i-C₉H₁₉-C₆H₄-(OCH₂CH₂)_n (wherein n = 4, 6, 10, 12), C_8-10H_17-37-(OCH₂CH₂)₆; R₁ means CH(CH₃)-C_nH_2n+1 (wherein n = 8-18), C_8-18H_17-37; R₂ means hydrogen atom (H), -CH₃, -C₂H₅ as a corrosion inhibitor and bactericidal agent with respect to sulfate-reducing microorganisms and as a reagent for prevention of hydrogen sulfide formation in petroleum bed and for replacing the oil. Also, invention describes a corrosion inhibitor, i. e. bactericidal agent in mineralized aqueous and aqueous-oil media comprising a base and a solvent wherein inhibitor comprises oxyethylated alkyl- (or phenol)methyl- or ethyl phosphites of N-methyl- or ethylalkylammonium by claim 1 as an active base and taken in the following ratio, wt.-%: oxyethylated alkyl- (or phenyl)methyl- or ethyl phosphites of N-methyl- or ethylalkylammonium, 20-80, and solvent, the balance. The present invention is based on the development of effective corrosion inhibitor soluble in mineralized waters and possessing the bactericidal effect with respect to sulfate-reducing microorganisms that can be used as a reagent for prevention of formation of hydrogen sulfide in oil bed and as additive to water for replacing oil from the bed. Proposed compounds can be used as agents for protection of oil field equipment against hydrogen sulfide and microbiological corrosion, in output systems, transport and storage of oil, in flooded oil beds and in secondary methods in oil output.

EFFECT: valuable technical properties of compounds.

2 cl, 6 tbl, 7 ex