METHOD FOR INCREASING OUTPUT OF ETHYLENE AND PROPYLENE IN PROPYLENE PRODUCTION PLANT Russian patent published in 2019 - IPC F25J3/02 F25J3/04 C07C11/04 C07C11/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of regenerating components of ethylene and propylene in an apparatus for producing propylene. Method is carried out using a system for target production of propylene, involving: cooling the mixed stream of light vapour in the upper part of the de-ethaniser and the steam of the cracking gas to form a first partial condensate and a first residual vapour; passing the first partial condensate to the bottom of the rectification column; passing the first residual steam up through the distillation column filler during the contact of the first residual steam with the counter flow, to obtain a stream in the upper part of the rectification column, and a liquid stream in the lower part of the rectification column; passing the liquid stream from the lower portion of the rectification column to the de-ethaniser; partial condensation of the stream in the upper part of the rectification column at one or more stages of heat exchange for cooling the flow in the upper part of the rectification column to obtain a second partial condensate with the second residual vapour. Then, passing the mixed second residual steam and the first residual liquid into the drum separator to separate the second residual steam from the first residual liquid; optionally using a second residual steam as a gaseous fuel and/or cooling medium on one or more stages of the heat exchanger; passing the first portion of the second residual liquid into the upper portion of the rectification column filler as an oncoming stream; and passing second part of second residual liquid into product regeneration system.

EFFECT: technical result consists in increasing the output of ethylene and propylene.

5 cl, 3 dwg