Processes and apparatuses for separating aromatic and non-aromatic hydrocarbons

A process for separating aromatic and nonaromatic hydrocarbons, the process comprising:

• passing a feed stream comprising aromatic and nonaromatic hydrocarbons to a first separation zone comprising a separation column configured to provide a first stream comprising the nonaromatic hydrocarbons and a second stream comprising the aromatic hydrocarbons and a solvent;
• passing the second stream to a second separation zone comprising a separation column configured to provide a third stream comprising the aromatic hydrocarbons, a fourth stream comprising the solvent, and a fifth stream comprising the solvent, wherein the fourth stream comprises a side draw stream;
• passing the fifth stream to a first heat transfer zone configured to transfer heat from the fifth stream to the first separation zone, wherein the first heat transfer zone is inside of the separation column in the first separation zone;
• passing the fourth stream to a second heat transfer zone configured to transfer heat from the fourth stream to the feed stream;
• and,
• after passing the fourth stream to the second heat transfer zone, passing the fourth stream to the separation column in the first separation zone.