偏铁酸钠催化合成共轭亚油酸

Synthesis of Conjugated Linoleic Acid Catalyzed by Sodium Ferrate

以红花菜籽油中亚油酸为原料,偏铁酸钠为催化剂,在单因素试验的基础上,选取反应温度、反应时间、催化剂用量为考察因素,以异构化产物共轭亚油酸(CLA)转化率为响应值,通过响应面分析法对异构化反应进行优化,并建立相应的回归模型,试验结果表明,红花菜籽油中亚油酸异构化为CLA的最佳工艺为:反应温度195℃、反应时间4.7 h、催化剂用量0.6 g,在此条件下得到CLA转化率为92.90%,与预测值93.92%相比,误差为1.02%。然后再通过脲素包合纯化、经2%的H;SO;-CH;OH溶液甲酯化后,用气相色谱-质谱联用仪检测CLA含量为64.27%。

Using linoleic acid in safflower seed oil as the raw material and Sodium Ferrate as the catalyst,based on the single factor test,the reaction temperature,reaction time,and catalyst dosage were selected as the investigation factors.The conversion rate of conjugated linoleic acid (CLA) was the response value.The isomerization reaction was optimized by response surface analysis and the corresponding regression model was established.The test results showed that the optimal process of linoleic acid isomerization in safflower rapeseed oil was the reaction temperature of 195℃,the reaction time of 4.7 h,and the catalyst amount of 0.6 g.Under this condition,the CLA conversion rate was 92.90%,and an error was 1.02%compared to the predicted value of 93.92%.Then it was purified by urea inclusion and methyl esterified by 2%H;SO;-CH;OH solution,and the CLA content was detected by gas chromatography-mass spectrometry to be 64.27%.