FIELD: chemistry.
SUBSTANCE: invention relates to extraction of one or more monomers from gas flow (1), which includes following steps: in same first extraction column C1: a) step of extraction by bringing gas flow (1) in extraction column (C1) into contact with organic extraction solvent (2), wherein said extraction solvent (2) absorbs said monomer or monomers, and b) step for distillation or desorption with inert gas in extraction column (C1) by feeding into lower part of column (C1) below point of feeding monomer-containing gas stream (1), inert gas stream (12), wherein stream (3) of liquid containing extraction solvent and monomer or monomers is removed from below column (C1), and stream (4) of exhaust gas is discharged from top of column (C1), further, in second regeneration column C2: c) a step for extracting said monomer or monomers, where said monomer or monomers are separated from extraction solvent by distillation in regeneration column (C2), in which is fed a stream (3) liquid drawn from below column (C1), wherein stream containing concentrated monomer or monomers (5), is removed from top of column (C2), and stream (2) of liquid containing extraction solvent is removed from below column (C2), further, recirculating into upper part of column (C1); wherein monomer or monomers are selected from dienes, vinyl aromatic compounds and isobutene.
EFFECT: use of present invention enables to minimise content of impurities at monomer extraction step.
10 cl, 5 dwg, 6 tbl, 1 ex
