醇酯交换法合成甾醇酯工艺研究  

Research on synthesizing phytosterol esters by transesterification

作　　者：夏辉[1] 史宣明[1] 鲁海龙[1] 

机构地区：[1]国家粮食储备局西安油脂科学研究设计院,陕西西安710082

出　　处：《粮油食品科技》2011年第1期26-28,48,共4页Science and Technology of Cereals,Oils and Foods

摘　　要：以植物甾醇、油酸甲酯为原料,甲醇钠为催化剂,研究了甾醇酯的合成工艺。通过单因素试验和正交试验确定了酯化反应的最优条件为:甾醇与甲酯摩尔比1:4,催化剂用量1.2%,反应温度125℃,反应时间4 h,真空度0.095 MPa,甾醇酯纯度为92.28%。甾醇酯的脱色条件为:真空脱色0.095 MPa,温度95℃,时间25 min,脱色剂添加量为活性白土3%+活性炭3%。真空蒸馏条件为:真空度150 Pa,蒸馏温度160～190℃。精制后产品甾醇酯纯度达到93.7%。Phytosterol ester was synthesized by phytosterol and methylesters in the presence of catalyst sodium methylate.By single factor test and orthogonal test the optimum processing parameters were obtained as follows： molar ratio of phytosterols to methylesters was 1：4,the amount of catalyst sodium methylate was 1.2%,the esterification temperature was 125 ℃,the reaction time was 4 h and vacuum was 0.095 MPa,the purity of phytosterol ester was 92.28%.The condition of bleaching was vacuum 0.095 MPa,temperature 95 ℃,for 25 min,active carbon 3% and activated beaching earth 3%.The condition of vacuum distillation was vacuum 150 Pa,temperature 160～190 ℃.The purity of product was up to 93.7% after refine.

关 键 词：植物甾醇 甲酯 酯交换 

分 类 号：TS221[轻工技术与工程—粮食、油脂及植物蛋白工程]