PROCESS FOR PRODUCING PROPYLENE OXIDE Russian patent published in 2018 - IPC C07D301/12 C07D301/36 C07D303/04 B01J29/70 B01J29/89 B01J27/18 B01J37/02 

FIELD: technological processes.

SUBSTANCE: invention relates to a continuous process for producing propylene oxide, which comprises (i) providing a liquid feed stream comprising propene, hydrogen peroxide, acetonitrile, water, optionally propane, and at least one dissolved potassium salt; (ii) passing the feed stream provided in (i) into an epoxidation reactor comprising a catalyst comprising a titanium zeolite of structure type MWW, and subjecting the feed stream to epoxidation reaction conditions in the epoxidation reactor, obtaining a reaction mixture comprising propylene oxide, acetonitrile, water, the at least one potassium salt, optionally propene, and optionally propane; (iii) removing an effluent stream from the epoxidation reactor, the effluent stream comprising propylene oxide, acetonitrile, water, at least a portion of the at least one potassium salt, optionally propene, and optionally propane. At least one potassium salt is selected from the group consisting of at least one inorganic potassium salt selected from the group consisting of potassium hydroxide, potassium chloride, at least one organic potassium salt selected from the group consisting of potassium formate, potassium acetate, potassium carbonate and potassium hydrogen carbonate, and a combination of at least one of the at least one inorganic potassium salt and at least one of at the least one organic potassium salt.

EFFECT: invention also relates to a catalyst system for producing propylene oxide and the use of said potassium salt as an additive to said catalyst.

15 cl, 1 tbl, 9 ex