正戊烷浸出大豆油工艺研究

Study on extraction of soybean oil with n-pentane

以大豆坯片为原料,采用罐组式浸出法,正戊烷作溶剂进行浸出研究。通过改变影响因素,选择最优工艺条件,结合实际要求得到正戊烷浸出工艺条件为:浸出温度26℃,浸出次数3次,豆坯水分含量6.63%,豆坯坯厚0.231mm,在此条件下,粕中残油率为1.03%;浸出所得大豆毛油色泽Y70、R2.0,酸价1.81mgKOH/g,不皂化物含量1.73%,磷脂1.31%,并与正己烷浸出进行比较;同时测定浸出大豆粕蛋白含量为57.7%,NSI值82.7%。

Soybean was extracted with new solvent of n-pentane to obtain oil. The optimal processing conditions for extraction were determined by single factors experiment. The characteristics of crude oils from the n-pentane extraction process were measured and compared with that from n-hexane extraction process. The optimal conditions of pilot-plant process by n-pentane extraction were： extraction temperature 26℃, flake thickness 0.231 mm, extraction times 3, and moisture contents of oilseeds 6.63 %. Under the optimal conditions the residual oil of meal was 1.03%. The characteristics of crude oils from the n-pentane extraction were： color Y70, R2.0, acid value 1.81 mgKOH/g, unsaponification 1.73%, and phosphatidy 1.31%. the crude protein content of meal was 57.7%, and the value of NSI was 82.7%.