Patent ID: 9682904
Date: 2017-06-20
CPC Classifications: C07C

Claim:
1. A method for separating benzene from a reactor effluent, the method comprising: recovering a reactor effluent from a reaction zone, wherein the reactor effluent includes hydrocarbons having between four and seven hydrocarbons and further includes benzene; passing the reactor effluent to a first separation zone to separate the reactor effluent into an overhead stream including hydrocarbons having six carbons or less and a bottom stream including hydrocarbons having seven carbon atoms or more and comprising less than 15% of a total benzene amount in the reactor effluent, the first separation zone having an operating temperature of between about 65° C. to 130° C.; cooling the overhead stream of the first separation zone to produce a cooled overhead stream; passing the cooled overhead stream to a second separation zone to separate the cooled overhead stream into a benzene rich bottom stream comprising at least 80% of the total amount of benzene in the reactor effluent and a second overhead stream, the second separation zone having an operating temperature lower than the operating temperature of the first separation zone, the second separation zone having a temperature of between about 40° C. to about 50° C.; and passing at least a portion of the benzene rich bottom stream from the second separation zone to a debutanizer.