초록 ▼

The present invention relates to a hydrocatalytic process for treating vacuum gas oils, residual feedstocks or mixtures thereof in the presence of up to 100 ppm of V and Ni at moderate hydrogen partial pressures. The process consists of two or more stages: (a) demetallization of feedstock to levels

The present invention relates to a hydrocatalytic process for treating vacuum gas oils, residual feedstocks or mixtures thereof in the presence of up to 100 ppm of V and Ni at moderate hydrogen partial pressures. The process consists of two or more stages: (a) demetallization of feedstock to levels below 10 ppm of V and Ni, and (b) hydrodenitrogenation and hydroconversion of catalysts using a combined bed, and catalytic cracking of the 370°C.±fraction to obtain gasolines. This process applies also to vacuum gas oils obtained from other processes, such as FCC, Flexicoque, etc.

대표청구항 ▼

A hydrocatalytic process for producing diesel and gasoline from high-residual vacuum gas oil, which comprises: (a) contacting high-residual vacuum gas oil feedstock with a fixed bed hydrodemetallization (HDM) catalyst composed of elements selected from Groups VIb and VIII of the Periodic Table in th

A hydrocatalytic process for producing diesel and gasoline from high-residual vacuum gas oil, which comprises: (a) contacting high-residual vacuum gas oil feedstock with a fixed bed hydrodemetallization (HDM) catalyst composed of elements selected from Groups VIb and VIII of the Periodic Table in the presence of hydrogen and under moderate operating conditions to achieve at least 80% by weight of metal removal; (b) conveying product from step (a) together with light cycle oil (LCO), heavy cycle oil (HCO) or a mixture thereof from fluid catalytic cracking (FCC) to a second catalyst bed, which is composed of a combination of catalysts, consisting of elements selected from Groups VIb, VIII and Va of the Periodic Table, and wherein said catalysts are present in proportions ranging from 0 to 70% by volume at the top and from 30 to 100% by volume at the bottom of the second catalyst bed, and passing said product through said second catalyst bed in the presence of hydrogen and under operating conditions substantially the same as those in step (a); (b′) transmitting product from step (b) through a third catalyst bed consisting of an element selected from Groups VIb and VIII of the Periodic Table supported on a silica-alumina base, and where said catalysts are present in an amount which varies from 30 to 50% of total catalyst volume, and passing said product through the third catalyst bed in the presence of hydrogen and under substantially the same or different operating conditions from those of step (a); and (c) separating diesel fuel and naphthas from the product from step (b) or from step (b′), recovering the diesel fuel and then subjecting the resulting product to catalytic cracking (FCC).