FIELD: chemical technology.
SUBSTANCE: invention relates to a method for purifying phenolic flow prepared after distillation of raw acetone in separating decomposition products of cumene hydroperoxide from hydroxyacetone by rectification method. For removal of hydroxyacetone from phenolic flow methods of azeotropic-extractive rectification is used with using a combined separating agent wherein hydrocarbon (cumene and/or α-methylstyrene) is used as one components, and water is used as another component. Method involves feeding a separating agent in common with feeding a column, maintaining the mass ratio of hydrocarbon and water that equal or above the mass ratio of concentrations of hydrocarbon and water in the corresponding azeotropic mixtures, removing hydroxyacetone from column with distillate aqueous flow and feeding organic phase to phlegm wherein this organic phase is depleted with hydroxyacetone. Use of this method provides enhancing selectivity and complete distillation of hydroxyacetone.
EFFECT: improved purifying method.
17 cl, 2 dwg, 13 ex
| Title | Year | Author | Number |
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