Patent ID: 9683181
Date: 2017-06-20
CPC Classifications: C10G

Claim:
1. A process for controlling a temperature of a feed stream passed to an isomerization zone; the process comprising: combining a feed stream with a stream from a first separation column; heating the feed stream in a first heat exchanger; heating the feed stream in a second heat exchanger; heating the feed stream in a third heat exchanger; heating the feed stream in a heating zone; passing the feed stream to the isomerization zone comprising a plurality of reactors and a stabilization zone; and, passing an effluent stream from at least one reactor to the stabilization zone without using the effluent stream to heat the feed stream, wherein the stream from the separation column heats the feed stream in the first heat exchanger; heating the feed stream in at least the third heat exchanger with at least a portion of an effluent from a first reactor from the plurality of reactors; heating the feed stream in at least the second heat exchanger with at least a portion of an effluent from a second reactor from the plurality of reactors; heating the first separation column by the effluent stream from the second reactor with an effluent stream from a sidedraw reboiler; and controlling a flow of the effluent stream from the second reactor through the sidedraw reboiler by adjusting a valve in a bypass line, the bypass line being configured to pass a portion of the effluent stream from the second reactor around the sidedraw reboiler, wherein a pressure differential controller is disposed in an outlet for the sidedraw reboiler.