METHOD OF SYSTEM SEPARATION: BENZOL-PERFLUOROBENZOL-TERTIARY AMYL ALCOHOL Russian patent published in 2008 - IPC C07B63/00 C07C15/04 C07C25/13 C07C17/386 C07C7/08 C07C31/125 C07C29/84 B01D11/04 

FIELD: chemistry.

SUBSTANCE: method includes supply of initial mixture and dimethylsulfoxide (DMSO) as separating agent, taken in ratio 7-7.5:1 to initial mixture, into extraction rectification column (1) efficiency 50 t.t., initial mixture being supplied on 30 t.t., separating agent on 10 t.t. of column (plate numeration from top of column), phlegm number in column constitutes 1.5-2, taking of benzol in distillate and mixture benzol-perfluorobenzol (PFB) - tertiary amyl alcohol (TAA)-DMSO from column (1) cube , supply of mixture PFB-TA-DMSO on 25 t.t. of column of separating agent regeneration (2) with efficiency 50 t.t., phlegm number in column being 1-3, removal separating agent from column cube and its supply to column (1), supply of column (2) distillate, representing aseotropic mixture PFB-TAA, for separation into complex of two columns (3) and (4) with efficiency 35 t.t., with removal from column cubes of TAA and PFB, respectively, aesotropic mixture being supplied on 18 t.t. of column (3), phlegm numbers of columns (3) and (4) being equal 0.5-1.5 and 1-2 respectively, re-cycle of aseotrope PFB-TAA, which is separated in distillate of column (4) into column(3) feeding, ratio of re-cycle of column (4) and feeding of column (3) being (1-1.1):0.66, pressure in columns (1)-(3) is 300 mm of mercury, pressure in column (4) - 760 mm of mercury.

EFFECT: simplification of technology, increase of ecological compatibility of process and quality of obtained products.

1 tbl, 1 dwg, 1 ex