废白土再生及其对大豆油脱色的影响  

Regeneration of spent white clay and its effect on bleaching of soybean oil

作　　者：刘春成 王彤[1] 刘芳[1] 万兆祥 于殿宇[1] 朱秀清[1] LIU Chuncheng;WANG Tong;LIU Fang;WAN Zhaoxiang;YU Dianyu;ZHU Xiuqing(Food College,Northeast Agricultural University,Harbin 150000,China)

机构地区：[1]东北农业大学食品学院,哈尔滨150000

出　　处：《中国油脂》2018年第7期10-13,共4页China Oils and Fats

基　　金：国家"十三五"攻关课题(2016YFD0401402);黑龙江省自然基金(C2017019)

摘　　要：以再生白土对大豆油预脱色的脱色率为指标,对废白土再生的工艺进行研究。采用单因素试验优化了废白土再生工艺参数为液固比3.0∶1.0(硫酸与废白土质量比)、酸化温度60℃、焙烧温度400℃、硫酸体积分数7%、酸化时间60 min,优化后的再生白土颗粒饱满,呈灰白色,吸附性好。将再生白土应用于大豆油预脱色中,在再生白土添加量0.7%、脱色温度90℃、脱色时间20 min条件下,热敏物质不易分解,其脱除率达97%。与正常工艺制备的大豆油相比,新白土添加量较少,且此条件下的成品油不易返色。The regeneration process of spent white clay was studied by investigating the ctecotorauon rate of soybean oil in the pre - bleaching process. The regeneration process parameters were optimized by sin- gle factor experiment as follows： mass ratio of sulfuric acid to spent white clay 3.0： 1.0, acidification temperature 60 ℃, calcination temperature 400 ℃, sulfuric acid volume fraction 7%, time 60 min. And the particles of the regenerated white clay were full with grayish white tion ahihty. The regenerated white clay was used in the pre- bleaching of soybean oil, tions of dosage of regenerated white clay 0.7%, bleaching temperature 90 ℃, and b and acidification and good adsorp- under the condi- leaching time 20 rain, the thermosensitive material did not easily decompose, and its removal rate reached 97%. Com- pared with the soybean oil prepared by the normal process, the dosage of fresh white clay was less, and the color reversion of finished oil could not easily occur under this condition.

关 键 词：大豆油 再生白土 热敏物质 预脱色 脱除率 返色 

分 类 号：TS225.1[轻工技术与工程—粮食、油脂及植物蛋白工程] TS224.6[轻工技术与工程—食品科学与工程]