In order to improve the problems of low hydration degumming rate and high loss rate of neutral oil in traditional oil refining,etc.In this study,ultrasonic assisted hydration degumming method was mainly used to degum rapeseed crude oil.The effects of four factors,i.e.water volume,hydration temperature,ultrasound time,and ul-trasound power,on the degumming effect of rapeseed crude oil were investigated by single factor experiment.Based on the single factor experiment,the response surface optimization was conducted,and the order of influence of each factor on the degumming effect was found to be hydration temperature＞water volume＞ultrasound time.The re-sults indicated that under the conditions of volume fraction of water added of 8％,hydration temperature of 55℃,ul-trasound power of 65 W and ultrasound time of 10 min,the phosphorus content of rapeseed degummed oil decreased to the lowest,being 21.67 mg/kg,and the degumming rate reached the highest,being 85.49％.Compared with hy-dration degumming,the degumming rate increased by 23.81％.In addition,ultrasound assisted treatment could ef-fectively reduce the acid value,iodine value,and peroxide value of rapeseed crude oil,the content of saturated fatty acids in oil was decreased,the quality of oil was improved,and the storage period was extended,resulting in a clea-rer and brighter degummed oil color.
维普
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