Patent ID: 7250106
Filing Date: 2007-07-31
Classification: B01J,C10G

Abstract:
1. A process for the production of oils starting from a hydrocarbon-containing feedstock that has a sulfur content of less than 1000 ppm by weight, a nitrogen content of less than 200 ppm by weight, a metal content of less than 50 ppm by weight, whereby said process comprises the following successive stages after an optional hydrotreatment of the feedstock: (a) converting pretreatment of the feedstock to effect hydroisomerization and hydrocracking reactions, whereby said stage takes place at a temperature of 200-500° C., under a pressure of 5-25 MPa, with a volumetric flow rate of 0.1-5 h a mean pore diameter, measured by mercury porosimetry, encompassed between 20 and 140 Å, a total pore volume, measured by mercury porosimetry, encompassed between 0.1 ml/g and 0.6 ml/g, a total pore volume, measured by nitrogen porosimetry, encompassed between 0.1 ml/g and 0.6 ml/g, a BET specific surface area encompassed between 100 and 500 m a pore volume, measured by mercury porosimetry, encompassed in the pores with diameters of more than 140 Å, of less than 0.1 ml/g, a pore volume, measured by mercury porosimetry, encompassed in the pores with diameters of more than 160 Å, of less than 0.1 ml/g, a pore volume, measured by mercury porosimetry, encompassed in the pores with diameters of more than 200 Å, of less than 0.1 ml/g, a pore volume, measured by mercury porosimetry, encompassed in the pores with diameters of more than 500 Å, of less than 0.01 ml/g, an X ray diffraction diagram that contains at least the main lines that are characteristic of at least one of the transition aluminas contained in the group that consists of the alpha, rho, chi, eta, gamma, kappa, theta and delta aluminas, a pore distribution, such that the ratio between volume V said non-zeolitic silica-alumina substrate comprises at least two silico-aluminum zones that have Si/Al ratios that are less than or greater than the overall Si/Al ratio that is determined by X ray fluorescence; (b) catalytic dewaxing of at least a portion of resultant effluent from stage a), carried out at a temperature of 200-500° C., under a pressure of 1-25 MPa, with an hourly volumetric flow rate of 0.05-50 h