Abstract: Ultrasonic was used to extract oil from Passiflora edulis seed in this study. The effects of ultrasonic power,ultrasonic time,extraction temperature and materials to organic solvent ratio on Passiflora edulis seed oil yield were investigated,and these factors were optimized by orthogonal test L9(34). The optimal conditions of ultrasonic-assisted extraction are ultrasonic power 250 W,extraction time 35 min,extraction temperature 45 ℃,and materials to cyclohexane ratio 1:8(W/V). The assistant effect of ultrasonic shortens extraction time from 4 h to 35 min and increases Passiflora edulis seed oil yield from 24.11% to 24.27%,but does not change the quality of Passiflora eduliss eed oil.

Key words: ultrasonic, Passiflora edulis seedoil, extraction