Patent ID: 11939535
Assignee: PETRÓLEO BRASILEIRO S.A.—PETROBRAS
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 1:
2. The method according to claim 1, further comprising:
mixing the composite load stream with a stream of recycled product from the first separator vessel and an injection of recycle gas, rich in hydrogen;
heating a fraction of the composite load stream and recycle gas and directing the fraction to an inlet of a hydrotreating reactor;
directing an unheated fraction of the composite load, stream and recycle gas to a region between catalytic beds of the hydrotreating reactor, for reactor temperature control;
directing an effluent from the hydrotreating reactor to the first separator vessel where an aqueous phase, a gaseous phase comprising light hydrocarbons, and a liquid phase are separated;
returning a first fraction of the liquid phase from the first separator to the beginning of the process to dilute the composite load stream;
mixing a second fraction of the liquid phase from the first separator with replacement hydrogen and directing a resulting mixture to a hydrocracking reactor, located downstream of the hydrotreating reactor;
sending effluent from the hydrocracking reactor to a second separator vessel, from where a H2-rich gas stream is recycled directly to the hydrotreating reactor, with no need for treatment in amine units to remove contaminants; and
directing a liquid stream from the second separator vessel to a distillation tower where a lighter stream, rich in olefins with 3 to 4 carbon atoms; a gasoline stream, rich in isomers and olefins; a stream with a QAV distillation range, containing olefins and aromatics; a renewable diesel stream and a stream heavier than diesel are separated.