Patent ID: 8692046

Claim:
A process for isomerizing a feed stream comprising one or more C4-C6 paraffins, comprising: A) contacting the feed stream in an isomerization reaction zone with an isomerization catalyst at isomerization conditions to produce an isomerization zone effluent; B) passing at least a portion of the isomerization zone effluent to a stabilizer zone and recovering a stabilizer overhead stream comprising one or more C5 − hydrocarbons, a bottom stream comprising at least about 85%, by weight, one or more C6 + hydrocarbons, and a stripper feed stream comprising at least about 85%, by weight, one or more C5 + hydrocarbons; C) passing the stripper feed stream to a stripping zone and separating the stripper feed stream into a stripper overhead stream comprising at least about 5%, by weight, one or more C4 hydrocarbons and a stripper bottom stream comprising at least about 90%, by weight, one or more C5 + hydrocarbons; and D) passing at least a portion of the stripper bottom stream to a deisopentanizer zone comprising a deisopentanizer column; and E) passing a bottom stream from the deisopentanizer column to the isomerization reaction zone.