ISOLATION OF PROPYLENOXIDE FROM MIXTURE, CONTAINING PROPYLENOXIDE AND METHANOL Russian patent published in 2008 - IPC C07D301/32 

FIELD: chemistry.

SUBSTANCE: method includes (i) introduction of said mixture (M) into extractive distillation column; (ii) additional introduction of extracting solvent into said extractive distillation column; (iii) distillation of main propylenoxide distilate from said extractive distillation column in form of upper flow; (iv) diversion of low-part flow from said extractive distillation column; (v) compression of upper flow, obtained in (iii), by means of at least, one compressor, in order to produce compressed steam.

EFFECT: improvement of energy balance of process of propylenoxide isolation with simultaneous reduction of degree of upper and lower flow pollution with methanol and propylenoxide respectively.

19 cl, 5 dwg, 2 tbl, 5 ex