Synthesis of Sodium Diethylphosphinate by Gas-Liquid Free Radical Addition Reaction under Atmospheric Pressure
Under atmospheric pressure, a novel preparation of sodium diethylphosphinate was carried out by free-radical addition reaction of ethylene and sodium hypophosphite on gas-liquid interface. A self-design gas-liquid reactor was used to improve efficiency of the addition reaction , and made the product with purity of 99% obtained only in 6 hours，even no additional purification. The molecular structure of sodium diethylphosphinate was confirmed by FTIR, and 31P NMR spectroscopic analysis.
Yanguo Shi and Jinlong Zuo
X. Y. Han et al., "Synthesis of Sodium Diethylphosphinate by Gas-Liquid Free Radical Addition Reaction under Atmospheric Pressure", Advanced Materials Research, Vols. 183-185, pp. 35-39, 2011