A process for converting heavy petroleum feedstocks to produce fuel oils and fuel-oil bases with a low sediment content comprises: a) fixed-bed hydrotreatment, b) optional separation of the effluent originating from the hydrotreatment stage a), c) hydrocracking of at least a part of the effluent from a) or of at least a part of the heavy fraction originating from b), d) separation of the effluent originating from c), e) maturation of the heavy liquid fraction originating from the separation d), and f) separation of the sediments from the heavy liquid fraction originating from the maturation e).

A process for converting heavy petroleum feedstocks to produce fuel oils and fuel-oil bases with a low sediment content comprises: a) fixed-bed hydrotreatment, b) optional separation of the effluent originating from the hydrotreatment stage a), c) hydrocracking of at least a part of the effluent from a) or of at least a part of the heavy fraction originating from b), d) separation of the effluent originating from c), e) maturation of the heavy liquid fraction originating from the separation d), and f) separation of the sediments from the heavy liquid fraction originating from the maturation e).

The present invention relates to a process for the preparation of catalyst(s), comprising the cokneading of boehmite with an active phase comprising a salt of heteropolyanion of Keggin and/or lacunary Keggin and/or substituted lacunary Keggin and/or Anderson and/or Strandberg type, and their mixtures, exhibiting, in its structure, molybdenum and cobalt and/or nickel. The present invention also relates to a process for the hydrotreating and/or hydroconversion of a heavy hydrocarbon feedstock in the presence of catalyst(s) prepared according to said process.

The present invention relates to a process for the preparation of catalyst(s), comprising the cokneading of boehmite with an active phase comprising a salt of heteropolyanion of Keggin and/or lacunary Keggin and/or substituted lacunary Keggin and/or Anderson and/or Strandberg type, and their mixtures, exhibiting, in its structure, molybdenum and cobalt and/or nickel. The present invention also relates to a process for the hydrotreating and/or hydroconversion of a heavy hydrocarbon feedstock in the presence of catalyst(s) prepared according to said process.

A process of reforming a diesel feedstock to convert diesel to a gasoline blending component may include desulfurizing and denitrogenizing the diesel feedstock to reduce the sulfur and nitrogen content; and then hydrocracking the diesel feedstock over a metal containing zeolitic catalyst to produce an isomerate fraction. The diesel feedstock may have boiling points ranging from 200 to 360° C.

A process of reforming a diesel feedstock to convert diesel to a gasoline blending component may include desulfurizing and denitrogenizing the diesel feedstock to reduce the sulfur and nitrogen content; and then hydrocracking the diesel feedstock over a metal containing zeolitic catalyst to produce an isomerate fraction. The diesel feedstock may have boiling points ranging from 200 to 360° C.

The invention provides a process for the preparation of an olefinic product, comprising: (a) reacting an oxygenate feedstock, in a reaction zone in the presence of a molecular sieve catalyst, at a temperature from 350 to 1000° C., to produce a reaction effluent stream, comprising at least oxygenate, olefin, water and acidic by-products; (b) cooling the reaction effluent stream by means of an indirect heat exchange to a temperature greater than the dew point temperature of reaction effluent stream; (c) further rapidly cooling the reaction effluent stream to a temperature lower than the dew point temperature of the reaction effluent stream by direct injection of an aqueous liquid into the reaction effluent stream, to form a first quench effluent stream; and (d) separating the first quench effluent stream into a first liquid quench effluent stream and a first gaseous quench effluent stream, comprising the olefinic product.

The invention provides a process for the preparation of an olefinic product, comprising: (a) reacting an oxygenate feedstock, in a reaction zone in the presence of a molecular sieve catalyst, at a temperature from 350 to 1000° C., to produce a reaction effluent stream, comprising at least oxygenate, olefin, water and acidic by-products; (b) cooling the reaction effluent stream by means of an indirect heat exchange to a temperature greater than the dew point temperature of reaction effluent stream; (c) further rapidly cooling the reaction effluent stream to a temperature lower than the dew point temperature of the reaction effluent stream by direct injection of an aqueous liquid into the reaction effluent stream, to form a first quench effluent stream; and (d) separating the first quench effluent stream into a first liquid quench effluent stream and a first gaseous quench effluent stream, comprising the olefinic product.

A method of hydrotreatment of Fischer-Tropsch synthesis products, the method including: 1) mixing Fischer-Tropsch wax with a sulfur-containing liquid crystal, contacting a resulting mixture with hydrogen, feeding a hydrogen-containing mixture to a first reaction region, feeding an effluent from the first reaction region to a second reaction region, and carrying out hydrocracking reaction; 2) feeding a hydrocracking product from the second reaction region and Fischer-Tropsch naphtha and diesel fuel to a third reaction region, carrying out hydrofining reaction; feeding an effluent from the hydrofining reaction to a fourth reaction region, and carrying out hydroisomerizing pour-point depression reaction; and 3) feeding an effluent from the fourth reaction region to a gas-liquid separation system to yield hydrogen-rich gas and liquid products, recycling the hydrogen-rich gas, and feeding the liquid products to a distilling system.

Systems and methods are provided for processing of challenged feedstocks to produce distillate fuel products, such as jet boiling range products and/or diesel boiling range products. The challenged feedstocks can have a high aromatics content, a low API gravity, and/or a low cetane index/cetane number. A feedstock can be processed to form distillate fuel products by processing the feedstock in reaction system including at least two stages. The first stage can perform an initial amount of hydrotreating and/or hydrocracking, while the second stage can include exposing a portion of the hydrotreated and/or hydrocracked effluent to a USY catalyst including a supported noble metal. The USY catalyst can have a desirable combination of catalyst properties. Processing a challenged feedstock in a second stage with the USY catalyst having a desirable combination of properties can allow for production of an increased yield of distillate fuel from the challenged feedstock.