An isomerization unit comprising: a first dividing wall column comprising: a first side configured as a stabilizer column; and a second side configured as naphtha splitter column, wherein the first side and the second side of the first dividing wall column is separated by a top dividing wall and wherein the first dividing wall column comprises a bottoms reboiler configured to receive a bottoms stream from the first dividing wall column and to feed a portion of the bottoms stream back to the first dividing wall column 210); a feed line for feeding the feed stream into the first side of the first dividing wall column; a second dividing wall column comprising: a first side configured as a depentanizer column; and a second side configured as a deisohexanizer column, wherein the first side and the second side of the second dividing wall column is separated by a top dividing wall, wherein the second dividing wall column comprises a first condenser and a second condenser, the first condenser configured to reflux a portion of an overheads stream from the first side of the second dividing wall column to an overheads section of the first side of the second dividing wall column, and the second condenser configured to reflux a portion of an overheads stream from the second side of the second dividing wall column to an overheads section of the second side of the second dividing wall column and wherein the second dividing wall column comprises a bottoms reboiler configured to receive a bottoms stream from the second dividing wall column and to feed a portion of the bottoms stream back to the second dividing wall column, a deisopentanizer column coupled to the first dividing wall column configured to receive a light naphtha overhead stream from the second side of the first dividing wall column; an isomerization reactor coupled to the deisopentanizer column and configured to receive a bottoms stream from the deisopentanizer column; and a stabilizer column coupled to the isomerization reactor and configured to receive a stream comprising unstable isomerate from the isomerization reactor and to feed stable isomerate to the second dividing wall column. a first dividing wall column comprising: a first side configured as a stabilizer column; and a second side configured as naphtha splitter column, wherein the first side and the second side of the first dividing wall column is separated by a top dividing wall and wherein the first dividing wall column comprises a bottoms reboiler configured to receive a bottoms stream from the first dividing wall column and to feed a portion of the bottoms stream back to the first dividing wall column 210); a first side configured as a stabilizer column; and a second side configured as naphtha splitter column, wherein the first side and the second side of the first dividing wall column is separated by a top dividing wall and wherein the first dividing wall column comprises a bottoms reboiler configured to receive a bottoms stream from the first dividing wall column and to feed a portion of the bottoms stream back to the first dividing wall column 210); a feed line for feeding the feed stream into the first side of the first dividing wall column; a second dividing wall column comprising: a first side configured as a depentanizer column; and a second side configured as a deisohexanizer column, a first side configured as a depentanizer column; and a second side configured as a deisohexanizer column, wherein the first side and the second side of the second dividing wall column is separated by a top dividing wall, wherein the second dividing wall column comprises a first condenser and a second condenser, the first condenser configured to reflux a portion of an overheads stream from the first side of the second dividing wall column to an overheads section of the first side of the second dividing wall column, and the second condenser configured to reflux a portion of an overheads stream from the second side of the second dividing wall column to an overheads section of the second side of the second dividing wall column and wherein the second dividing wall column comprises a bottoms reboiler configured to receive a bottoms stream from the second dividing wall column and to feed a portion of the bottoms stream back to the second dividing wall column, a deisopentanizer column coupled to the first dividing wall column configured to receive a light naphtha overhead stream from the second side of the first dividing wall column; an isomerization reactor coupled to the deisopentanizer column and configured to receive a bottoms stream from the deisopentanizer column; and a stabilizer column coupled to the isomerization reactor and configured to receive a stream comprising unstable isomerate from the isomerization reactor and to feed stable isomerate to the second dividing wall column.