Study on optimization of solvent extraction deacidification process of pork intestinal oil

The pork intestinal oil was deacidified by solvent extraction deacidification method in this study. Taking95% ethanol as the extraction solvent, the effect of extraction time, extraction temperature, extraction times and ratio of oil to alcohol on the acid value and yield of pork intestinal fat were researched by single factor investigations. The orthogonal test was designed to get the optimum processing parameters of the solvent extraction deacidification. The results showed that the free fatty acids in pork intestinal oil could be removed effectively by this method. The optimum processing formula was extraction temperature 45℃, extraction times4 times, ratio of oil to alcohol 1∶1.5, extraction time 10 min. With the above processing, the acid value of pork intestinal oil had fallen to 0.8560 mg KOH·g-1, the yield was 81.94%.