PURIFICATION OF PROPYLENE OXIDE Russian patent published in 2015 - IPC C07D301/32 C07D301/19 

FIELD: chemistry.

SUBSTANCE: method includes reacting propylene oxide with glycol and an alkane, beginning with C₇ or higher, during liquid extraction and separating propylene oxide with lower content of impurities. The purified propylene oxide can be obtained during reaction of propylene and hydroperoxide to form a crude stream of propylene oxide, followed by distillation of the crude stream and forming a stream of propylene oxide containing 1-5 wt % impurities, followed by reaction of the stream of propylene oxide with glycol and alkane, starting from C₇ or higher, during a liquid extraction process, followed by separation of the alkane fraction containing propylene oxide from the glycol fraction and single-step or multi-step distillation of the alkane fraction to form alkane residues and propylene oxide containing less than 0.1 wt% impurities as the product.

EFFECT: high efficiency of the purification method.

14 cl, 1 dwg, 2 ex