Long-Chain Alkyl Esters of O,O-Dialkyl Dithiophosphoric and Thionophosphoric Acids Prepared on the Basis of Red Phosphorus, Elemental Sulfur, Alcohols, and Industrial Fractions of Higher Monoolefins

GRAPHICAL ABSTRACT

Abstract

Mixtures of long chain S-alkyl O,O-dialkyl dithiophosphates, and O-alkyl O,O-dialkyl thionophosphates were obtained by the reaction of red phosphorus with elemental sulfur, alcohols, and industrial fractions of С₁₆–С₁₈ and С₂₀–С₂₆ of higher olefins in the presence of Lewis acid catalysts. The products obtained possess high anticorrosion activities toward mild steel.

Keywords:

• Red phosphorus
• sulfur
• alcohols
• higher olefins
• anticorrosion activity