两段式脱臭过程对大豆油中反式脂肪酸含量的影响  

Effect of Two-Stage Deodorizing Process on Content of TransFatty Acid in Soybean Oil

作　　者：李振岚[1] 罗淑年 史加宁 冯丽丽 于殿宇[1] 

机构地区：[1]东北农业大学食品学院,哈尔滨150030 [2]九三粮油工业集团有限公司,哈尔滨150090

出　　处：《中国粮油学报》2011年第10期66-69,共4页Journal of the Chinese Cereals and Oils Association

基　　金："十一五"国家科技支撑计划(2009BADB9B08-1);黑龙江省科技攻关计划(GA09B401)

摘　　要：本试验以脱色大豆油为原料,采用两段式的脱臭方式,首先将脱色大豆油加热至170℃,通入直接蒸汽脱除油脂中的酮类等低沸点的物质,通入压力为0.5 MPa蒸汽,蒸汽用量为油重的0.3%,脱臭时间为12 min,残压为266 Pa,初步脱臭后大豆油中反式脂肪酸的质量分数为0.016%,为了脱除油脂中的游离脂肪酸、烃类等高沸点的物质,将大豆油加热至240℃,蒸汽用量为油重的0.5%,脱臭时间为40 min,残压为266 Pa。由于大豆油在高温条件下脱臭时间短,不易形成反式脂肪酸,成品油中反式脂肪酸质量分数仅为0.38%。In this experiment,bleaching vegetable oil was chosen as a raw material,and two-stage deodorization was obtained by using the external heating method in the process of oil deodorizing.First,deodorizing temperature of the oil reached to 170 ℃,and the direct steam came into the tray column in order to remove low boiling point materials,including ketone.The water steam pressure was 0.5 MPa,deodorizing time was 12 min,the consumption of water stream was 1% of oil weight,and residual pressure was 266 Pa.After the preliminary deodorization,the content of trans fatty acid in Soybean Oil was 0.016 %.Then in order to remove high boiling point materials,such as Free fatty acid and hydrocarbon,deodorizing temperature reached to 240 ℃,deodorizing time was 40 min,the consumption of water stream was 0.5% of oil weight and residual pressure was 266 Pa.The deodorizing time of the oil was greatly shortened at a high temperature,it was unlikely to form trans-fatty acids,and the trans-fatty acids content in the soybean oil was only 0.38%.

关 键 词：大豆油 两段式脱臭 脱臭温度 脱臭时间 反式脂肪酸 

分 类 号：TS224[轻工技术与工程—粮食、油脂及植物蛋白工程]