1. The research of the pour point depressant in the 10 B preparation process Chen Yongpan

2. Subject Origin Complex compound Density/10 3 (kg·m -3 ) Freezing point/K Ratio of the complex agent and BF 3 Separation factor anisole·BF 3 1.2036278.91.0-1.21.032 acetone·BF 3 1.0404289.51.0-1.21.045 The good point of acetone ： 1.Higher Separation factor 2.More stable than anisole The weak point of acetone ： Freezing point of complex compound close to normal temperature So acetone will be a good complex agent if we can solve the problem

3. Subject Origin Pour Point Depressant （ PPD ） Allows diesel freezing point lower 15-30 ℃, to achieve the purpose of improving the low temperature flow of the diesel. We could use an agent like PPD to reduce the freezing point of acetone·BF 3

4. The mechanism of PPD 1. Nucleation theory 2. Adsorption theory 3. Eutectic theory 4. Adsorption-eutectic theory 5. Improve the solubility theory

5. The require of acetone·BF 3 ’s PPD 1. stability 2. withstand high temperature 3. make the freezing point lower nearly 10 ℃

6. Model building TANK transfer piping engine TANK transfer piping and column Schizolysis column For diesel: For acetone: High tempureture Reaction happens

7. Problems 1. PPD usually is a macromolecular, and acetone·BF 3 is micromolecule, PPD may fail. 2. The crystallize mechanism of acetone·BF 3 is not clear. There are a lot of work to do if we want to find a new PPD.

8. Reference 李永明. 夏海英. 降凝剂的作用机理、发展概况和发展趋势. 内蒙古石 油化工.2008 年第 21 期. 李克华. 降凝剂及其降凝机理. 石油与天然气化工. 第 22 期第 1 卷 张巧风. 原油降凝剂研究概况. 延安职业技术学院学报. 第 24 卷第 5 期 王景昌. 赵建涛等. 高效降凝剂的合成与改性. 石油化工. 2012 年第 41 卷第 2 期. 安文杰. 张心玲. 一种生物柴油降凝剂的研制. 石油与天然气化工. 第 41 卷第 2 期.