Patent ID: 8188327
Filing Date: 2012-05-29
Classification: C07C,C10G,Y02P

Abstract:
1. A process for the production of iso-octene from isobutylene contained within an FCC product stream, a thermal cracker product stream or a dehydrogenation product stream, said stream also containing water, propylene, dienes and unreactive C 4 's, comprising the steps of: (a) feeding hydrogen and said FCC product stream, a thermal cracker product stream or dehydrogenation product stream, down flow to a reactor containing a top bed of selective hydrogenation catalyst and a bottom bed of sulfonated resin catalyst; (b) selectively hydrogenating the dienes in said top bed; (c) dimerizing a portion of the isobutylene to iso-octene and hydrating a portion of the propylene with water to form isopropyl alcohol in said bottom bed; (d) removing an effluent from the bottom of said reactor, said effluent containing iso-octene, isopropyl alcohol, unreacted isobutylene and unreactive C (e) feeding the effluent to a distillation column reactor wherein di-isobutene is taken as a bottoms product and isopropyl alcohol, unreacted isobutylene and unreactive C (f) recycling a portion of said side draws containing unreacted isobutylene, isopropyl alcohol and unreactive C (g) feeding a portion of said side draws to a second reactor containing a sulfonated resin catalyst to convert additional isobutylene to iso-octene; and (h) feeding the effluent from said second reactor to said distillation column reactor to the same tray from which it was removed.