Patent ID: 9302957
Filing Date: 2016-04-05
CPC Classification: C07C,C10G

Claim Text:
1. A process for the isomerization of isoparaffins to normal paraffins, the process comprising: separating a portion of C6 cyclic hydrocarbons from a naphtha stream comprising C5+hydrocarbons to provide a C6 cyclic hydrocarbons lean stream; separating iC5 paraffinic hydrocarbons and iC6 paraffinic hydrocarbons from the C6 cyclic hydrocarbons lean stream; and, passing a feed stream comprising at least one stream being rich in iC5 paraffinic hydrocarbons, iC6 paraffinic hydrocarbons, or both to an isomerization zone containing a chlorided alumina catalyst to isomerize isoparaffins to normal paraffins, disproportionate at least some isoparaffins, and ring open some cyclopentane; and, controlling an amount of C6 cyclic hydrocarbons passed into the isomerization zone to from about 0.1 to about 5 wt. % of the feed stream by at least one of the following: selectively adding a stream of C6 cyclic hydrocarbons to the isomerization zone; and, controlling an operating parameter of a separation zone used to separate the C6 cyclic hydrocarbons from the naphtha stream.