响应面试验优化油脂分段脱色工艺  

Optimization of Stepwise Bleaching of Soybean Oil by Response Surface Methodology

作　　者：魏贞伟[1] 梁宝生[2] 张青[2] 任悦[2] 刘欣[2] 于殿宇[2] 王俊国[1] 

机构地区：[1]吉林工商学院粮油食品深加工吉林省高校重点实验室,吉林长春130507 [2]东北农业大学食品学院,黑龙江哈尔滨150030

出　　处：《食品科学》2016年第14期32-36,共5页Food Science

基　　金：粮油食品深加工吉林省高校重点实验室开放基金项目(高2016第001号);吉林省教育厅科学研究计划基金项目(教育厅2016第125号)

摘　　要：利用多次吸附平衡可有效降低油脂的色泽原理,采用单因素试验探究分段脱色工艺对大豆油脱色效果的影响,然后通过响应面法获得最佳脱色工艺参数。在添加总量一定时,将活性白土分3段进行添加,通过改变每段添加量比例,确定最佳吸附平衡的条件;在搅拌速率为150 r/min时,活性白土添加总量1.27%、脱色温度100℃、脱色总时间60 min,脱色油脂酸值为0.12 mg KOH/g,过氧化值为3.26 mmol/kg,色泽为黄18、红1.45,相对于常规脱色工艺活性白土用量减少9.29%,提高了油脂的精炼率。A stepwise procedure for bleaching soybean oil was developed on the basis of the principle that multiple adsorption equilibriums allow effective bleaching of soybean oil. The optimization of processing conditions was done using one-factor-at-a-time method and response surface methodology. To crude soybean oil, activated clay was added in three different portions until reaching the same final concentration. The best bleaching efficiency of soybean oil was obtained when activated clay was added to a final concentration of 1.27% with stirring at 150 r/min for 60 min at 100 ℃. Under these conditions, the acid value and peroxide value of soybean oil were up to 0.12 mg KOH/g and 3.26 mmol/kg, respectively. The yellowness and redness of the oil were respectively 18 and 1.45 as measured using a Lovibond tintometer. Compared with the conventional bleaching process, the new process used 9.29% less activated clay and simultaneously improved the refining efficiency.

关 键 词：大豆油 活性白土 分段脱色 吸附平衡 脱色率 

分 类 号：TS224.6[轻工技术与工程—粮食、油脂及植物蛋白工程]