Patent ID: 8333884

Claim:
Partial conversion hydrocracking process comprising the steps of: (a) hydrotreating a hydrocarbon feedstock with a hydrogen-rich gas to produce a hydrotreated effluent stream comprising a liquid/vapour mixture and separating the liquid/vapour mixture into a liquid phase and a vapour phase in a liquid vapour separation system; (b) separating the liquid phase into a controlled liquid portion and an excess liquid portion in the liquid vapour separation system; (c) limiting the flow of the controlled liquid portion by flow control; (d) combining the vapour phase with the excess liquid portion to form a vapour plus liquid portion in the liquid vapour separation system; (e) withdrawing the vapour plus liquid portion by overflow; and (f) separating an FCC feed-containing fraction from the controlled liquid portion and simultaneously hydrocracking the vapour plus liquid portion to produce a diesel-containing fraction, or hydrocracking the controlled liquid portion to produce a diesel-containing fraction and simultaneously separating a FCC feed-containing fraction from the vapour plus liquid portion.