Patent ID: 8501978

Claim:
A process for manufacturing a polyfluoroalkanoyl phosphorodichloridate having the formula R f —CH 2 —O—P(O)Cl 2 , said process comprising: reacting a polyfluorinated alkanol having the formula R f —CH 2 —OH, wherein R f is a linear or branched C 1 -C 8 perfluoroalkyl group optionally interrupted by O, with at least 4 moles of POCl 3 per mole of R f —CH 2 —OH in the presence of 0.1 to 0.2 moles of LiCl catalyst per mole of R f —CH 2 —OH at a temperature between 95° C. and 110° C. to form a polyfluoroalkanoyl phosphorodichloridate of the formula R f —CH 2 —O—P(O)Cl 2 , wherein the molar ratio of polyfluoroalkanoyl phosphorodichloridate to byproduct polyfluoroalkanoyl phosphorochloridate is at least 10 to 1.