purification of propylene oxide obtained from the epoxidation of propylene using hydrogen peroxide

摘要

preferably using hydrogen peroxide for the epoxidation reaction of propylene in the resulting crude product from the epoxidation of the purified oxidation purification of propylene. The method includes the bulk water, the bulk of methanol and after removal of unreacted propylene to extraction distillation using water and the obtained propylene oxide product as a extraction solvent, the crude product from the epoxidation. Under about 55 than about 75 and distillation conditions including a temperature of less than the lower end, the overhead or side containing the purified propylene oxide-cut distillate stream is, the lower the oxidation of propylene to propylene glycol and other glycol heavies is obtained in a yield loss. Purified propylene oxide is further purified by distillation in the finishing, the purity of the propylene oxide can be obtained that satisfy the requirements of the commercial grade (commercial grade).