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。
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 rain and temperature 90 ℃ ,the second time 3% bleaching earth,temperature 85 ℃, the vacuum 0. 1 MPa, time 15 rain ; deodorization vacuum 0.08 MPa, deodorization temperature 180 ℃, deodorization time 1.5 h.
出处
《中国油脂》
CAS
CSCD
北大核心
2007年第1期25-28,共4页
China Oils and Fats
关键词
米糠油
浸提
精炼
营养
保健
rice bran oil
extraction, refining, nourishment
health
