Low-waste Technology of Obtaining Epoxy Compounds. Part 2. The Technology of Propylene Oxide Production by Peroxide Method

The proposed technological process of manufacturing propylene oxide, calculated on the production capacity of 50 thousand ton per year to create the raw materials base for synthesis of polyols, polyurethanes, polyether resins. On the basis of the research trial of the process by liquid-phase epoxidation of propylene the optimal parameters of the process are determined. The conversion of hydrogen peroxide is more than 99 %, the yield of the propylene oxide is 94 %. The process includes three main stages: (1) raw materials preparation, (2) liquid-phase epoxidation of propylene, (3) distillation of the target product. The scheme provided for recirculation of unreacted propylene and the solvent – methanol.