盐藻油脱色和酯化脱酸研究  

Studies on Decoloration, Esterification for Deacidification Technology of D. Salina Oil

作　　者：孙协军[1] 李秀霞[1] 励建荣[1] 蔡路昀[1] 田鑫[1] 陶秀春 李佳运[1] 

机构地区：[1]渤海大学食品科学与工程学院,辽宁锦州121013

出　　处：《中国食品学报》2017年第2期127-133,共7页Journal of Chinese Institute Of Food Science and Technology

基　　金："十二五"国家科技支撑计划项目(2012BAD29B06;2015BAD17B03);中国博士后科学基金面上资助项目(20090460422)

摘　　要：目的:采用吸附剂吸附和酯化方法分别研究盐藻油的脱色和脱酸工艺。方法:在选取的几种脱色剂中,颗粒活性炭的脱色效果最好,最佳脱色工艺:向盐藻油甲醇稀释液中加入质量为油溶液质量2%的活性炭,在温度30℃脱色处理1.5 h。此时,油溶液的脱色率可达到79.75%,脂肪酸保留率为78.32%。对脱色前、后盐藻油理化性质的分析表明,脱色盐藻油黏度降为60.26 mm^2/s(40℃),热值略有提高,脱色后盐藻油品质得到提高。采用酯化方法对脱色后盐藻油进行脱酸处理,最佳脱酸工艺:在反应温度70℃,醇油物质的量比25:1条件下,用1.5%硫酸为催化剂,催化盐藻油酯化反应100 min。酯化后盐藻油的酸值降为0.65 mg KOH/g,热值提高,黏度降为31.52 mm^2/s(40℃)。结论 :经脱色和脱酸处理的盐藻油品质提高,可满足酯交换反应制备生物柴油原料油的要求。The decoloration and esterification method was used to reduce the color and acid value of D.Salina oil,respectively.Decoloring results showed that activated carbon was the most efficient decoloring agent among several agents,the optimal condition was：2% activated carbon were added to algae oil and methanol solution,then reaction under 30 ℃ for 1.5 h,at the optimal condition,the decoloration ratio was 79.75%,and 78.32% fatty acid were remained.After decoloration,the viscosity of D.Salina oil reduced to 60.26 mm2/s （40 ℃） and the heating value increased slightly,then the quality of D.Salina oil was improved;Esterification method was used to reduce the acid value of D.Salina oil,the optimal deacidification technique parameters was：reaction temperature of 70 ℃,molar ratio of methanol to oil was 25∶1,reaction time 100 min,1.5% sulfuric acid was used as catalyst,under the optimal conditions,the acid value of D.Salina oil was reduced to 0.65 mg KOH/g,the viscosity of D.Salina oil reduced to 31.52 mm2/s （40 ℃） and the heating value increased,then the quality of D.Salina oil meted the requirenent of biodiesel feedstock.

关 键 词：盐藻油 脱色 脱酸 

分 类 号：TS224[轻工技术与工程—粮食、油脂及植物蛋白工程]