Patent ID: 7097815

Claim:
A system for hydroprocessing a hydrocarbon feed, comprising: a first hydroprocessing zone containing a hydroprocessing catalyst and having an inlet for cocurrently receiving a hydrocarbon feed and a first hydrogen-containing gas phase, said first hydroprocessing zone producing a first liquid hydrocarbon product and a gas phase containing hydrogen sulfide, hydrogen and volatile hydrocarbon fractions; a plurality of additional hydroprocessing zones each containing a hydroprocessing catalyst and including a final zone and an upstream zone, said upstream zone having an inlet for cocurrently receiving said first liquid hydrocarbon product from said first hydroprocessing zone and a recycled hydrogen-containing gas phase, and said upstream zone producing an intermediate product; a liquid gas separator having an inlet for receiving the intermediate product and producing a separated gas phase containing hydrogen sulfide, hydrogen and volatile hydrocarbon product and a liquid intermediate hydrocarbon product, said final zone having an inlet for cocurrently receiving said liquid intermediate hydrocarbon product cocurrently with a second hydrogen-containing gas phase; a separator for receiving a product from said final hydroprocessing zone and for separating said product into a hydrocarbon phase and said recycled hydrogen-containing gas phase; and a low temperature separator having an inlet for receiving said gas phase and said separated gas phase so as to produce a separated liquid phase containing said volatile hydrocarbon fractions and a gas phase containing said hydrogen sulfide and hydrogen.