Methods and apparatuses for isomerization of paraffins

A method for isomerization of paraffins, the method comprising the steps of:

• Contacting, in a C5/C6 isomerization section, a C5+ hydrocarbons-containing feed stream that comprises unbranched C5/C6 hydrocarbons with a chloride-promoted isomerization catalyst in the presence of hydrogen to form a branched C5+ hydrocarbons-containing reaction zone effluent;
• separating the branched C5+ hydrocarbons-containing reaction zone effluent into a C4− hydrocarbons-containing stabilizer vapor stream from a stabilizer overhead receiver and a C5+ hydrocarbon-rich product stream that comprises branched C5+ hydrocarbons;
• compressing the C4− hydrocarbons-containing stabilizer vapor stream to form a compressed C4− hydrocarbons-containing stabilizer stream;
• cooling the compressed C4− hydrocarbons-containing stabilizer stream to form a cooled, compressed C4− hydrocarbons-containing stabilizer stream;
• and
• separating the cooled, compressed C4− hydrocarbons-containing stabilizer stream into a C4 hydrocarbons-containing liquid stream and a C3− hydrocarbons-containing off gas stream;
• combining the C4 hydrocarbons-containing liquid stream with a branched C4 hydrocarbons-containing reaction zone effluent from a C4 isomerization section to form a C4 hydrocarbons-containing combined stream;
• and
• separating the C4 hydrocarbons-containing combined stream into a C3− hydrocarbons-containing stabilizer vapor stream and a C4 hydrocarbons-rich product stream that comprises branched C4 hydrocarbons wherein, prior to the step of compressing, the C4− hydrocarbons-containing stabilizer vapor stream is demisted to remove mist droplets and/or deposits from the C4− hydrocarbons-containing stabilizer vapor stream.