METHOD OF SEPARATING MIXTURE OF SOLVENTS METHANOL-TETRAHYDROFURAN-ACETONITRILE-WATER-PYRIDINE

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to chemical industry. Method involves separation of a five-component mixture, which is carried out in circuits, including one or two three-column complexes of extractive distillation. Separating agents used are sulpholane and dimethylsulphoxide. In first version sulpholane is fed into first column of separation circuit and into first column of three-column complex, and dimethyl sulphoxide is fed into first column of two-column complex for processing mixture of methanol-tetrahydrofuran as obtained distillate. In second version sulpholane is fed into first column of first three-column complex, and dimethyl sulphoxide is fed into first column of second three-column complex for processing mixture of methanol-tetrahydrofuran-water as obtained distillate. Composition of initial mixture is equimolar, amount of separating agent to initial mixture ranges from 0.2:1 to 2.5:1, reflux varies within range of 0.1-3.5.;EFFECT: invention provides for extraction of all components of said five-component industrial mixture of solvents and reduced power consumption.;1 cl, 2 dwg, 2 tbl, 2 ex