A METHOD OF SELECTING HEXENE-1 FROM A MIXTURE OF PRODUCTS PRODUCED IN THE ETHYLENE TRIMERIZATION ZONE Russian patent published in 2017 - IPC C07C7/04 C07C11/107 

FIELD: chemistry.

SUBSTANCE: invention relates to a process of separating hexene-1 from the mixture obtained in the reaction of section of the ethylene trimerization process, wherein mentioned mixture comprises ethylene, solvent, catalyst and ethylene trimerization products derived, including hexene-1. The method includes at least the following steps: a) separation in the first distillation column a mixture formed by the reaction of ethylene trimerization on top fraction containing ethylene and a bottoms fraction, b) separation of at least one other distillation column at least part of the stream bottoms fraction obtained in step a) for the top fraction containing hexene-1 and butene-1, and a bottoms fraction, c) separation in the final distillation column, at least part of the fraction containing hexene-1 and butene-1, get constant in step b), at the top fraction containing mainly 1-butene and a bottoms fraction containing mainly 1-hexene, wherein in said method: at least one portion of the stream bottoms fraction obtained in step b), is recycled to the a reaction section and at least one other portion of mentioned bottom fraction obtained in step b) is used in at least one recirculation loop, connecting the reaction section and the column of mentioned step b), mentioned recirculation loop allows to cool the reaction section and provide repeated of partial evaporation in mentioned column from step b).

EFFECT: process is more energy efficient.

18 cl, 8 ex, 2 dwg