Patent ID: 10773183

Abstract:
The invention relates to a separation system for separating a feed stream comprising C6+  hydrocarbons, the system comprising: i) a first distillation column for producing a first light stream comprising C6− hydrocarbons and a first heavy stream comprising C7+  hydrocarbons, wherein the first distillation column is operated between a lowest pressure and a highest pressure, ii) a second distillation column for producing a second light stream comprising C6− hydrocarbons and a second heavy stream comprising C7+  hydrocarbons, wherein the second distillation column is operated between a lowest pressure and a highest pressure, wherein the lowest pressure of the second distillation column is higher than the highest pressure of the highest distillation column and iii) a heat exchanger comprising a first reboiler for reboiling a part of the first heavy stream to produce a first boiled heavy stream and a second condenser for condensing the second light stream to produce a second condensed light stream, wherein the first reboiler and the second condenser are arranged such that heat released from the second condenser is used as heat for the first reboiler.