非共沸烃／醇型混合溶剂浸出大豆的研究Ⅰ．最佳浸出工艺条件的选择

Extraction of Soybean Flakes by Nonazeotrope Hexane Alcohol Mixture Ⅰ. Optimization of Extraction Condition

通过实验研究证明，由现行浸出溶剂与浓度为９１．１％ｗｔ的乙醇，按照一定配比构成的非共沸烃／醇型混合溶剂，对大豆具有良好的油脂浸出能力，可以作为现行浸出溶剂的替代溶剂在现行的浸出条件下使用。混合溶剂的组成在己烷：乙醇溶液＝７：３—５：５（重量比）的范围内是合适的，以６：４为最佳。按最佳配比构成的混合溶剂在浸出温度为５５℃，浸出时间为１００ｍｉｎ的条件下浸出大豆，可使残油率降至０．６９％，其浸出效果优于现行浸出溶剂。

The non azeotrope mixture composed of hexane and ethanol(91.1%wt.)shows an excellentoil extracting capability and can be used as an alternative solvent under present extraction condition. Thesuitable proportion of such Nonazeotrope for hexane:91.1%wt.ethanol is from 7:3 to 5:5(W:W),whilethe optimum proportiOn is 6 : 4.The residual oil in meal extracted by such optimum mixture(hexane:91.1%wt.ethanol=6:4)under present extraction condition on(55℃,100 min)can be decreased to 0.69% while theresidual oil in hexane extracted meal under the same condition is 1. 76%.