Patent ID: 6884339
Filing Date: 2005-04-26
Classification: C10G

Abstract:
1. Process for the production of oils and optionally high quality middle distillates from a hydrocarbon feedstock including at least 20% of end volume above 340° C., process that successively comprises the following stages: (a) Hydrotreatment carried out at a temperature of 330-450° C., under a pressure of 5-25 MPa, with a volumetric flow rate of 0.1-6 h (b) Hydrocracking, without intermediate separation of the effluent that is obtained at the end of the hydrotreatment, whereby the hydrocracking is carried out at a temperature of 340-430° C., under a pressure of 5-25 MPa, with a volumetric flow rate of 0.1-5 h (c) atmospheric distillation of the effluent that is obtained at the end of the hydrocracking to separate the gases from the liquid, and to recover at least one liquid fraction that contains compounds with a boiling point of higher than 340° C., (d) whereby said fraction is treated directly by catalytic dewaxing at a temperature of 200-500° C., under a total pressure of 1-25 MPa, with an hourly volumetric flow rate of 0.05-50 h (e) the dewaxed effluent is directly subjected to a hydrofinishing treatment that is carried out at a temperature of 180-400° C., which is lower than the catalytic dewaxing temperature by at least 20° C. and at most 200° C., under a total pressure of 1-25 MPa, with an hourly volumetric flow rate of 0.05-100 h (f) the effluent that is obtained from the hydrofinishing treatment is subjected to a distillation stage that comprises an atmospheric distillation and a vacuum distillation so as to separate at least one oil fraction at a boiling point of higher than 340° C. and that has a pour point of lower than −10° C., a content by weight of aromatic compounds of less than 2% and a VI of greater than 95, a viscosity at 100° C. of at least 3 cSt (or 3 mm