A process for recovery of hydrogen during hydroprocessing of a feedstock comprising oxygenates

Abstract

A process and process plant for partial hydroprocessing of a feedstock including oxygenates, including the steps of directing the feedstock, an amount of make-up hydrogen and a recycle gas to a catalytic hydrotreatment process under conditions converting 30-95% of oxygenates to hydrocarbons, to provide a partially hydroprocessed product stream, adding an amount of recycled wash water including at least 0.1 wt % oxygenates, to an amount of the hydroprocessed product stream, optionally in combination with a further amount of wash water, to provide a combined hydroprocessed product stream, cooling the combined hydroprocessed product stream and separating it in a vapor product fraction, a liquid aqueous fraction and a liquid product fraction, withdrawing as a waste stream a first amount of the liquid aqueous fraction either as a purge or by a purification process, directing as the amount of recycled wash water, at least a second amount of said liquid aqueous fraction.

Dependencies are inferred from the claim text.