Process for hydrotreating a liquid oil feedstock

A process for hydrotreating a liquid oil feedstock stream comprising the steps of:

• i) conducting the liquid oil feedstock stream to a stabilization step, the stabilization step comprising reacting the liquid oil feedstock stream with hydrogen in the presence of a catalyst for producing a stabilized composition, and separating therefrom:
• a stabilized stream comprising a gas phase, and
• a stabilized liquid oil stream;
• ii) providing a main hydrodeoxygenation (HDO) step, comprising:
• ii-1) conducting at least a portion of said stabilized stream comprising a gas phase, or a stabilized feed stream combining at least a portion of said stabilized stream comprising a gas phase and a portion of said stabilized liquid oil stream, to the main hydrodeoxygenation (HDO) step in a first bed active in hydrodeoxygenation (HDO), thereby producing a first main hydrotreated stream;
• ii-2) combining at least a portion of said stabilized liquid oil stream with said first main hydrotreated effluent stream, thereby producing a first mixed stabilized gas-liquid oil stream;
• ii-3) conducting said first mixed stabilized gas-liquid oil stream to a subsequent bed active in HDO, thereby producing a second main hydrotreated stream;
• ii-4) discharging a main hydrotreated effluent stream from the main HDO step, the main hydrotreated effluent stream comprising the second main hydrotread stream or a product thereof;
• wherein step ii-1) comprises:
• diverting a portion of said stabilized liquid oil stream from step i) and combining it with a first portion of said stabilized stream comprising a gas phase from step i), thus forming a stabilized gas-liquid stream;
• preheating said stabilized gas-liquid stream and combining it with a second portion of said stabilized stream comprising a gas phase from step i), for forming said stabilized feed stream.