Hydroprocessing of heavy hydrocarbon feeds

摘要

Heavy oil feeds are hydroprocessed in the presence of a solvent under conditions that provide a variety of benefits. The solvent can be an added solvent or a portion of the liquid effluent from hydroprocessing. The processes allow for lower pressure processing of heavy oil feeds for extended processing times or extended catalyst lifetimes be reducing or mitigating the amount of coke formation on the hydroprocessing catalyst.

主权项

1. A process for producing a hydroprocessed product, comprising:
exposing a combined feedstock comprising a heavy oil feed component and a solvent component to a hydroprocessing catalyst under effective hydroprocessing conditions to form a hydroprocessed effluent, the effective hydroprocessing conditions including a partial pressure of hydrogen of about 1000 psia (6.9 MPa) or less, a temperature of at least about 360° C., and a liquid hourly space velocity of the fraction of the combined feedstock boiling above 1050° F. (566° C.) of at least about 0.10 hr−1; separating the hydroprocessing effluent to form at least a liquid effluent; and fractionating a first portion of the liquid effluent to form at least a distillate product and a bottoms product, the bottoms product having an ASTM D6352 distillation point of at least about 600° F. (316° C.); wherein the solvent component comprises at least one single ring aromatic compound in which the solvent has an ASTM D86 10% distillation point of at least 120° C. (248° F.) and a 90% distillation point of not greater than 300° C. (572° F.); and wherein the at least one single-ring aromatic compound is trimethylbenzene.