不同硫酸加量制得活性白土对棉籽油的脱色研究  

Bleaching of cottonseed oil using acid activated bentonite treated by different dosage of sulfuric acid

作　　者：孙传庆[1] 武占省[1] 李春[1] 

机构地区：[1]石河子大学化学化工学院,新疆维吾尔自治区石河子市832003

出　　处：《中国油脂》2007年第1期42-45,共4页China Oils and Fats

基　　金：新疆生产建设兵团博士基金(04BSZJ04);石河子大学重大科技攻关项目(ZDGG2004-01)资助

摘　　要：研究了不同硫酸加量制得的活性白土对棉籽油脱色效果的影响。结果表明,脱色效果显著,脱色后油脂的过氧化值明显降低;活性白土过高的活性度和游离酸造成脱色后油脂的酸值升高,同时活性白土也会对油脂中一些游离脂肪酸产生吸附作用;选用脱色性能较好的25%硫酸加量制得的活性白土对棉籽油脱色工艺进行优化研究,通过正交实验确定了最优工艺条件为:脱色温度95℃、脱色时间15 m in、脱色真空度0.09 MPa及加土量5%。Bleaching efficiency of cottonseed oil using activated products prepared with various dosage of sulfuric acid was investigated. The results showed that the bleaching performance were significant. The peroxide value of bleached oil was decreased distinctly, higher activity degree and free acid of acid activated bentonite could increase the acid value of bleached oil, at the same time, some of free fatty acids were adsorbed easily by acid activated bentonite. In addition, bleaching process of cottonseed oil by acid activated bentonite treated with 25% sulfuric acid was performed, the optimum conditions were obtained as bleaching temperature 95℃ ,time 15 min and dosage of acid activated bentonite 5% （W/V） under vacuum 0. 09 MPa.

关 键 词：活性白土 硫酸 棉籽油 脱色 

分 类 号：TS225.19[轻工技术与工程—粮食、油脂及植物蛋白工程]