食品科学 ›› 2008, Vol. 29 ›› Issue (1): 165-168.

• 工艺技术 • 上一篇    下一篇

乳酸酯化最适工艺研究

 许彬, 潘丽军, 姜绍通, 罗水忠   

  1. 南阳理工学院生物与化学工程系; 合肥工业大学生物与食品工程学院; 合肥工业大学生物与食品工程学院 河南南阳473000合肥工业大学生物与食品工程学院; 安徽合肥230009;
  • 出版日期:2008-01-15 发布日期:2011-07-28

Study on Optimum Technology of Lactic Acid Esterification

 XU  Bin, PAN  Li-Jun, JIANG  Shao-Tong, LUO  Shui-Zhong   

  1. 1.Department of Biology and Chemical Engineering, Nanyang Institute of Technology, Nanyang 473000, China; 2.School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China
  • Online:2008-01-15 Published:2011-07-28

摘要: 采用中心组合旋转设计,对精馏法合成乳酸乙酯工艺条件进行试验优化,并通过等高线上的预测值进行了实验验证。结果表明:乙醇与乳酸的摩尔比是影响酯化率的显著因素,乙醇与乳酸的摩尔比(醇酸比)和环己烷与乳酸的摩尔比(带酸比)的交互作用、乙醇与乳酸的摩尔比和加热温度的交互作用对酯化率影响较显著。实验值与模型值的相关系数为0.988。得出最佳工艺条件为醇酸比4:1,带酸比0.8:1,催化剂用量2%,反应时间3h,加热温度110℃,该条件下乳酸酯化率可达到94%以上。

关键词: 乳酸, 酯化, 工艺, 中心组合旋转设计

Abstract: Synthesis of ethyl lactate with rectification was designed and optimized by central composite rotable design (CCRD). And predicted values on the contour plots were tested. Results showed that the ethanol/lactic acid ratio was the significant factor for esterification yield, and the interactions between ethanol/lactic acid ratio and cyclohexane/lactic acid ratio, ethanol/lactic acid ratio and heating temperature were less significant. The correlation coefficient of predict values and experiment values was 0.988.The optimum conditions in the experiment rang: ethanol/lactic acid ratio 4:1, cyclohexane/lactic acid ratio 0.8:1, catalyst loading 2%, incubation period 3 h and heating temperature 110 ℃. The esterification yield is 94% under these conditions.

Key words: lactic acid, esterification, technology, central composite rotable design