Process for increasing the concentration of normal hydrocarbons in a stream

A process for increasing the concentration of normal paraffins in a feed stream comprising:

• separating a naphtha feed stream into a normal paraffin rich stream and a non-normal paraffin rich stream;
• separating the non-normal paraffin rich stream to provide an iso-C6 paraffin rich stream and C6 cyclics rich stream;
• and
• isomerizing the iso-C6 paraffin rich stream over a first isomerization catalyst to convert non-normal paraffins to normal paraffins and produce an isomerization effluent stream.

A process for increasing the concentration of normal hydrocarbons in a feed stream comprising:

• separating a naphtha feed stream into a normal paraffins stream and a non-normal paraffins stream;
• isomerizing an iso-C4 paraffin rich stream over an isomerization catalyst to convert iso-C4 paraffins to normal C4 paraffins and produce an isomerization effluent stream;
• separating a normal C4 paraffin rich stream from said isomerization effluent stream;
• and
• feeding said normal C4 paraffin rich stream to the step of separating a normal paraffins stream from non-normal paraffins stream and desorbing normal paraffins from an adsorbent.