Process for operating sulfided hydroprocessing catalyst

A process plant comprising

• a hydroprocessing reactor, having an inlet and an outlet,
• a first product separation section configured for separation of a product in three phases, having an inlet, a gas outlet, a non-polar liquid outlet and a polar liquid outlet,
• a second product separation section configured for separation of a product in three phases, having an inlet, a gas outlet, a purified hydrocarbon outlet and a sour water outlet,
• a sour water separation section, having an inlet, a gas outlet, a purified water outlet and a sour water condensate outlet,
• wherein said hydroprocessing reactor outlet is in fluid communication with the first product separation section inlet,
• wherein the first product separation section gas outlet is in fluid communication with the hydroprocessing reactor inlet,
• wherein the first product separation section non-polar liquid outlet is in fluid communication with the second product separation section inlet,
• wherein said polar liquid outlet and said sour water outlet are in fluid communication with the sour water separation section inlet,
• wherein the sour water condensate outlet is in fluid communication with either the inlet of said hydroprocessing reactor, or with said first product separation section inlet, and
• wherein the process plant is configured for directing a feedstock to the hydroprocessing reactor inlet and configured for withdrawing a purified hydrocarbon from said purified hydrocarbon outlet.