Patent ID: 9365781
Filing Date: 2016-06-14
CPC Classification: C10G

Claim Text:
1. A hydroprocessing process comprising: (a) providing a down flow reactor comprising one or more hydroprocessing-catalyst beds and providing when two or more hydroprocessing-catalyst beds are present that said beds are disposed in sequence and in liquid communication; (b) contacting a hydrocarbon feed with hydrogen and optionally diluent to form a liquid feed mixture wherein hydrogen is dissolved in the mixture; (c) introducing said liquid feed mixture into the down flow reactor under hydroprocessing conditions; (d) reacting the liquid feed mixture by contact with the one or more hydroprocessing-catalyst beds, wherein each of said one or more hydroprocessing-catalyst beds is substantially liquid-full; (e) injecting hydrogen gas directly into at least one of the one or more hydroprocessing-catalyst beds at a controlled rate such that at least part of the hydrogen consumed in each bed by the hydroprocessing reaction is replenished and the substantially liquid-full condition in each hydroprocessing-catalyst bed is maintained; and (f) adjusting the controlled rate of hydrogen gas directly injected into at least one of the one or more hydroprocessing-catalyst beds based on the amount of hydrogen gas determined to be in a headspace above said at least one of the one or more hydroprocessing-catalyst beds.