【摘要】 对米糠油的制取和精炼工艺进行了研究。结果表明,米糠油浸出的最佳工艺条件是:米糠含水量7%,粉碎至50目,浸出溶剂异丙醇,浸出温度60℃,pH 6.0,料液比1∶5,浸出时间2 h。米糠油精炼的最佳工艺条件为:碱炼初温45℃,KOH浓度18.5%,超碱量0.4%;采用二次脱色工艺,第1次活性白土加量4%,脱色时间30 m in,脱色温度90℃;第2次活性白土加量3%,脱色时间15 m in,温度85℃,真空度0.1 MPa;在真空度0.08 MPa、温度180℃、脱臭时间1.5 h条件下,可以脱除米糠油中的臭味成分,保持米糠油的固有味道。更多还原

【Abstract】 The extraction of rice bran oil was studied.The result indicated that the best conditions to extract rice bran oil were:the water content of rice bran 7%,crushed fineness 50 meshes,solvent isopropyl alcohol,extraction temperature 60 ℃,pH 6.0,ratio of stuff to solvent 1∶5,extraction time 2 h.The best refining conditions were:early neutralization temperature 45 ℃,the concentration of KOH 18.5%,excess alkali quantity 0.4%;two times bleaching technology,the first time in the conditions of dosage of bleaching earth 4%,time 30 min and temperature 90 ℃,the second time 3% bleaching earth,temperature 85℃,the vacuum 0.1 MPa,time 15 min;deodorization vacuum 0.08 MPa,deodorization temperature 180℃,deodorization time 1.5 h.更多还原