Patent ID: 8123932

Claim:
A process for the conversion of a heavy feedstock selected from the group consisting of heavy crude oils, distillation residues, heavy oils coming from catalytic treatment, thermal tars, bitumens from oil sands, coals and high-boiling feedstocks of a hydrocarbon origin known as black oils, including the combined three process units: hydroconversion with catalysts in slurry phase, distillation or flash, and deasphalting, said method comprising: mixing at least part of the heavy feedstock and/or at least most of a stream containing asphaltenes obtained from a deasphalting unit with a suitable hydrogenation catalyst to form a first mixture and sending the first mixture to a hydrotreatment reactor into which hydrogen or a mixture of hydrogen and H 2 S is charged to form a hydrotreatment reaction product; sending a stream containing the hydrotreatment reaction product and the catalyst in dispersed phase to one or more distillation or flash units whereby one or more different fractions coming from the hydrotreatment reaction product are separated and a distillation residue or liquid comprising the catalyst in dispersed phase and which is rich in metal sulfides produced by demetallation of the feedstock is formed; recycling at least part of the distillation residue or liquid, to a deasphalting zone in the presence of solvents, optionally also fed with at least a fraction of the heavy feedstock, to form a second stream and a third stream, wherein the second stream comprises deasphalted oil and the third stream comprises other asphaltenes, wherein the stream containing the hydrotreatment reaction product and the catalyst in dispersed phase, before being sent to one or more distillation or flash units, is subjected to a high pressure separation pre-step in order to obtain a light fraction and a heavy fraction, the heavy fraction alone being sent to said distillation unit; and wherein the light fraction obtained by the high pressure separation pre-step is sent to a secondary hydrogenation post-treatment section, to produce a lighter fraction containing C 1 -C 4 gas and H 2 S and a heavier fraction containing hydrotreated naphtha and gas oil.