The measurement of solid―liquid equilibrium data of binary and ternary organic systems for imidacloprid + 2-nitroaminoimidazoline + NMP by DSC

Abstract Solid–liquid equilibrium data of imidacloprid (IMIP) + 2-nitroaminoimidazoline (NIM), 2-nitriminoimidazolidine,1,1′-(2,5-pyridinediyl)bis- (NMP) + IMIP, 2-nitroaminoimidazoline + NMP, NMP + NIM + IMIP were determined by differential scanning calorimetry (DSC), and given corresponding phase diagrams, respectively. All of them are identified as eutectic type, the corresponding eutectic molar compositions ( x eu,1 ) are 0.4962, 0.4229, 0.5506, and eutectic temperatures ( T eu ) are 402.41, 407.46 and 383.13 K, respectively, for IMIP(1) + NIM(2), NMP(1) + NIM(2), IMIP(1) + NMP(2). Furthermore, solid–liquid equilibrium data for the ternary system of NMP(1) + NIM (2) + IMIP(3) was also determined by DSC, T eu is 373.77 K, and x eu,1 is 0.3507. So it is significative to provide important engineering data for the separation and purification of imidacloprid.