Patent ID: 11873463
Assignee: REGEN III CORP.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 13:
14. A system comprising:
a purification unit configured to purify used oil, to form a feedstock comprising purified used oil;
a continuous counter-current liquid-liquid extraction column for extracting an extract from the feedstock using an extraction agent, the extraction column comprising an agitator configured to agitate the feedstock and the extraction solvent flowing through the extraction column at a variable agitation speed; and
a continuous flow liquid phase hydrogenation unit for hydroprocessing the extract extracted by the extraction column to produce an oil product,
wherein the continuous flow liquid phase hydrogenation unit comprises:
a hydrogenation reactor comprising a hydrogenation catalyst;
a transport line in fluid communication with the solvent extraction column and the hydrogenation reactor, for transporting the extract from the solvent extraction column to the hydrogenation reactor;
a diluent inlet on the transport line, for introducing a diluent into the extract flowing through the transport line to form a liquid mixture comprising the extract and the diluent;
a hydrogen inlet on the transport line located downstream of the diluent inlet, for introducing hydrogen into the liquid mixture; and
a guard bed located on the transport line between the diluent inlet and the hydrogen inlet, the guard bed configured to remove at least phosphorus and silicon from the liquid mixture.