Study on electrolyzed water- assisted residual oil extraction technology of Xanthoceras sorbifolia bunge cake

The electrolyzed water was used to extract the oil from cold- pressed Xanthoceras sorbifolia bunge cake. The effects of extraction solvent,ultrasonic power,ultrasonic time,electrolyzed water and extraction methods on Xanthoceras sorbifolia bunge cake oil extraction rate were investigated,and the oil rate was taken as index,a three factors and three levels orthogonal experiment was designed to optimize the oil extraction process,ultimately the optimum method was determined,that was ultrasonic assisted by electrolyzed water method,and its parameters were electrolyzed water p H10,ultrasonic power of 150 W,ultrasonic time of 30 min,extraction solvent petroleum ether( 60~90 ℃boiling range),its oil extraction rate was 30.43% higher than the ordinary water,and its extraction time was shorten from 10 h which wasted by soxhlet to 30 min.Gas chromatography was used to analyze the fatty acids composition of different extraction methods.The results showed that only the oil from cake extracted by ultrasonic assisted by electrolyzed water method concluded the eicosapentaenoic acid,also the content of nervonic acid in the oil from cake was about 9.23% higher than the methods such as soxhlet extraction,flash extraction assisted by electrolyzed water,and ultrasonic and flash extraction assisted by electrolyzed water in this paper.And this process had 4 kinds of fatty acids more than cold- pressed seed oil,they were teracosanoic acid,eicosapentaenoic acid,arachidonic acid and timnodonic acid,and the content of nervonic acid in the oil from cake was 27.24% higher than cold- pressed seed oil.