丙烯—正丙醇—双氧水—水四元体系相平衡数据的测定和关联

发布时间：2018-05-26 08:23

本文选题：丙烯-正丙醇-双氧水-水 + 相平衡　；参考：《天津大学》2015年硕士论文

【摘要】：自20世纪50年代以来,环氧丙烷作为一种重要的有机中间体用于聚醚多元醇、丙二醇和丙二醇醚的合成变得越来越重要。直到上个世纪末,环氧丙烷的工业生产方法主要有氯醇法和共氧化法,但是这两种方法都有很多缺点。和传统的方法相比,过氧化氢-环氧丙烷(HPPO)法合成环氧丙烷以TS-1(钛-硅沸石)作催化剂,具有副产物少和环境友好等优点,符合当前绿色化学的要求。新工艺以双氧水为氧化剂,低碳醇为溶剂,丙烯以气体的形式在含有氧化剂、催化剂和低碳醇的液相中发生非均相反应。另外,鉴于丙烯在该类体系中的溶解度是研究该反应动力学和反应设备设计的基础。因此,测定丙烯在该类体系中的溶解度数据不仅具有重要的理论意义而且具有十分重要的工程应用价值。尽管有很多学者对类似体系有过研究,但是由于上述体系中分子的结构性质差别较大、溶液的非理想性较强,有关该类体系的相平衡热力学仍然鲜有公开报道。本文采用自行设计的国内第一套带石英可视窗的可变体积高压釜,测定了丙烯-正丙醇-双氧水-水四元体系在不同醇水比(1-C3H7OH H2O2n:n)、不同温度和压力下的相平衡数据,并把得到的高压相平衡数据用Aspen Plus化工流程模拟软件进行了热力学关联,一致性较好,同时获得了该体系的交互作用参数,可以为相关体系的热力学模型提供必要的模型参数。
[Abstract]:Since the 1950s, propylene oxide as an important organic intermediate for polyether polyols, propylene glycol and propylene glycol synthesis has become more and more important. Until the end of the last century, the industrial production methods of propylene oxide were mainly chlor-alcohol method and co-oxidation method, but both methods had many disadvantages. Compared with the traditional method, the synthesis of propylene oxide by hydrogen peroxide / propylene oxide (HPPO) method using TS-1 (titanium-silicon zeolite) as catalyst has the advantages of less by-products and environmental friendliness, and meets the requirements of green chemistry. In the new process, hydrogen peroxide is used as oxidant, low carbon alcohol is used as solvent, propylene is reacted in the form of gas in liquid phase containing oxidant, catalyst and low carbon alcohol. In addition, the solubility of propylene in the system is the basis for the study of the reaction kinetics and the design of reaction equipment. Therefore, the determination of the solubility data of propylene in this kind of system has not only important theoretical significance but also very important engineering application value. Although many scholars have studied the similar systems, the phase equilibrium thermodynamics of these systems are rarely reported due to the large differences in the structure and properties of the molecules and the non-ideality of the solution. In this paper, the phase equilibrium data of propylene, n-propanol, hydrogen peroxide and water quaternary system at different alcohol-water ratio, 1-C _ 3H _ 7OH H _ 2O _ 2n: n ~ (2 +), at different temperatures and pressures have been determined by using the first domestic variable-volume autoclave with quartz window. The high pressure phase equilibrium data are correlated with each other by Aspen Plus chemical process simulation software, and the parameters of interaction are obtained, which can provide the necessary model parameters for the thermodynamic models of the related systems.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ013.1

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