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

Abstract

Copyright © Taylor & Francis Group, LLC. 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 C<inf>16</inf>-C<inf>18</inf> and C<inf>20</inf>-C<inf>26</inf> of higher olefins in the presence of Lewis acid catalysts. The products obtained possess high anticorrosion activities toward mild steel.