METHOD OF SYNTHESIS OF PHOSPHORIC ACID ESTERS Russian patent published in 2003 - IPC

FIELD: chemistry of organophosphorus compounds. SUBSTANCE: invention relates to method of synthesis of phosphoric acid esters and describes method of their synthesis. Solution of proton-donor reagent and white phosphorus or mixture phosphorus-water on the background of halogen-containing electrolyte in inert solvent is subjected for electrolysis using platinum or glass-carbon anode and platinum, steel or glass-carbon cathode at temperature 25-50 C and current density 90-120 mA/cm² by three-fold charge of phosphorus or mixture phosphorus-water to electrolyte being without isolation of product after processing each phosphorus batch and process is carried out up to complete phosphorus depletion followed by isolation of phosphorus acid esters by conventional methods of the latter of general formula: [(RA)_nP(O)(H)_m]_kO_x where if A is O (oxygen): and at n = 3; m = 0; k = 1; x = 0 then trialkyl phosphates where R means CH₃, C₂H₅, C₃H₇, iso-C₃H₇, C₄H₉, C₅H₁₁, C₉H₁₉; or triaryl phosphates where R means C₆H₅, ortho-CH₃C₆H₄, para-CI-C₆H₄, para-CH₃C₆H₄, ortho-Cl-C₆H₄, para-Br-C₆H₄, para-tert. -C₄H₉-C₆H₄; at n = 2; m = 1; k = 1; x = 0 then dialkyl phosphates where R means CH₃, C₂H₅, C₃H₇, C₄H₉; at n = 2; m = 0; k = 2; x = 1 then tetraalkyl phosphates where R means C₂H₅, C₃H₇, iso-C₃H₇, C₄H₉, iso-C₄H₉, iso-C₅H₁₁; if A means N (nitrogen): at n = 3; m = 0; k = 1; x = 0 then triamidophosphates where R means CH₃, C₂H₅, C₃H₇, C₄H₉. Phosphoric acid esters can be used as plasticizers, addition agent for lubricating oils and liquid fuel, additions for polymers and as extractants and chelating agents, herbicides, insecticides and antiblastic agents. EFFECT: enhanced output of process, expanded assortment of phosphoric acid esters. 9 cl, 10 tbl, 5 ex