OPTIMAL CONDITIONS FOR FRACTIONATION OF RAPESEED LECITHIN WITH ALCOHOLS

Deoiled rapeseed lecithin was fractionated with ethanol, and optimum c onditions have been determined to improve purified lecithin yield and phosphatidylcholine (PC) enrichment. The effect of extraction time, so lvent volume, ethanol concentration and temperature on the yield and t he PC enrichment have been described in the form of regression equatio ns. A full factorial experiment method and a second-order orthogonal d esign were used in the study. 'rhe regression equations were calculate d for the maximum value of the response functions optimized by an elec tronic data processing method, and the results (yield and PC enrichmen t calculated from regression equations) were compared with those obtai ned in control experiments. The use of calculated optimal parameters i n the fractionation process led to 81-96% and 58% increments in yield and PC enrichment, respectively.