Novel Effectively Carbonaceous and Sulfurated Hydrogen Corrosion Inhibitors on the Basis of Organosulfurphosphorus Compounds

Abstract

Novel ammonium salts of O,O-dialkyl dithiophosphoric acids were obtained by one-pot synthesis from white phosphorus, elemental sulfur, industrial alcohols or phenols, and amines. Long-chain S-alkyl O,O-dialkyldithiophosphonates were prepared by the reaction of red phosphorus with elemental sulfur, alcohols, and the cheap industrial fractions of С₁₆–С₁₈ and С₂₀–С₂₆ of higher α-olefins in the presence of Lewis acid catalyst. The dithiophosphates obtained possess the high anticorrosion activities toward mild steel.

GRAPHICAL ABSTRACT

Keywords:

• White and red phosphorus
• sulfur
• alcohols
• amines
• higher α-olefins
• dithiophosphates

Acknowledgments

The study was performed with financial support of the Russian Foundation for Basic Researches (Grants No. 09-03-00006-а and 12-03-00479-a).