Abstract: There is described a hydroprocessing process of at least one gas oil cut having a weighted mean temperature (TMP) between 240° C. and 350° C. using a catalyst comprising at least one metal of the group VIB and/or at least one metal of the group VIII of the periodic classification and a support comprising an amorphous mesoporous alumina having a connectivity (Z) greater than 2.7, the hydroprocessing process operating at a temperature between 250° C. and 400° C., at a total pressure between 2 MPa and 10 MPa with a ratio of hydrogen volume to volume of hydrocarbon-containing feedstock between 100 and 800 litres per litre and at an Hourly Volume Rate (HVR) which is defined by the ratio of the volume flow rate of liquid hydrocarbon-containing feedstock to volume of catalyst fed into the reactor between 1 and 10 h?1.

Abstract: Mesoporous and macroporous hydroconversion catalyst: a predominantly calcined alumina oxide matrix; a hydrogenating-dehydrogenating active phase with at least one VIB metal, optionally at least one VIII metal, optionally phosphorus, said active phase being at least partly co-mixed in said predominantly calcined alumina oxide matrix. Preparation process for a residue hydroconversion/hydrotreating catalyst by co-mixing of the active phase with a particular alumina. Use of the catalyst in hydrotreating processes, in particular hydrotreating of heavy feedstocks.

Abstract: A description is given of a process for hydrotreatment of at least one hydrocarbon feedstock having a weighted average temperature (WAT) of more than 380° C. using at least one catalyst containing at least one metal from Group VIB and/or at least one metal from Group VIII of the periodic table and a support containing an amorphous mesoporous alumina having a connectivity (Z) of more than 2.7, said hydrotreatment process operating at a temperature of between 250° C. and 430° C., at a total pressure of between 4 MPa and 20 MPa with a ratio of volume of hydrogen to volume of hydrocarbon feedstock of between 200 and 2 000 litres per litre and at an Hourly Volume Velocity (HVV) defined by the ratio of the volume flow of liquid hydrocarbon feedstock to the volume of catalyst fed into the reactor of between 0.5 and 5 h?1.

Abstract: The invention relates to a supported catalyst that comprises an oxide substrate that is for the most part calcined aluminum and an active phase that comprises nickel, with the nickel content being between 5 and 65% by weight of said element in relation to the total mass of the catalyst, with said active phase not comprising a metal from group VIB, the nickel particles having a diameter that is less than or equal to 20 nm, said catalyst having a median mesopore diameter of between 8 nm and 25 nm, a median macropore diameter of greater than 200 nm, a mesopore volume that is measured by mercury porosimetry that is greater than or equal to 0.30 mL/g, and a total pore volume that is measured by mercury porosimetry that is greater than or equal to 0.34 mL/g. The invention also relates to the method for preparation of said catalyst and its use in a hydrogenation method.

Abstract: The invention concerns a process for the preparation of an amorphous mesoporous and macroporous alumina, comprising at least one step for dissolving an acidic precursor of aluminium, a step for adjusting the pH by adding at least one basic precursor to the suspension obtained in step a), a step for co-precipitation of the suspension obtained at the end of step b) by adding at least one basic precursor and at least one acidic precursor to the suspension, a filtration step, a drying step, a shaping step and a heat treatment step. The invention also concerns an amorphous mesoporous and macroporous alumina with a bimodal pore structure having: a specific surface area SBET of more than 100 m2/g; a median mesopore diameter, by volume determined by mercury intrusion porosimetry, of 18 nm or more; a median macropore diameter, by volume determined by mercury intrusion porosimetry, in the range 100 to 1200 nm, limits included; a mesopore volume, as measured by mercury intrusion porosimetry, of 0.

Abstract: The invention relates to the preparation of a catalyst containing: a mainly aluminium oxide calcined support; a hydro-dehydrogenating active phase containing at least one metal of group VIB, the process including: a) a first precipitation step of at least one basic precursor and at least one acidic precursor, b) a heating step, c) a second precipitation step by addition to the suspension of at least one basic precursor and at least one acidic precursor, d) a filtration step; e) a drying step, f) a moulding step, g) a heat treatment step; h) an impregnation step of the hydro-dehydrogenating active phase on the support obtained in the step g).

Abstract: The invention concerns a catalyst comprising a calcined oxide matrix which is mainly alumina and an active phase comprising nickel, said active phase being at least partially co-mixed within said calcined oxide matrix which is mainly alumina, the nickel content being in the range 5% to 65% by weight of said element with respect to the total mass of catalyst, said active phase not comprising metal from group VIB, the nickel particles having a diameter of less than 15 nm, said catalyst having a median mesopore diameter in the range 8 nm to 25 nm, a median macropore diameter of more than 300 nm, a mesopore volume, measured by mercury porosimetry, of 0.30 mL/g or more and a total pore volume, measured by mercury porosimetry, of 0.34 mL/g or more. The invention also concerns the process for the preparation of said catalyst, and its use in a hydrogenation process.

Abstract: Process of preparing hydroconversion catalyst comprising: a calcined, predominantly alumina, oxide support; a hydrogenating-dehydrogenating active phase comprising group VIB metal, optionally group VIII metal, optionally phosphorus, the catalyst having: specific surface area ?100 m2/g, total pore volume ?0.75 ml/g, median mesopore diameter by volume ?18 nm, mesopore volume ?0.65 ml/g, macropore volume 15-40% of total pore volume; comprising: a) dissolving acidic aluminium precursor; b) adjusting pH with basic precursor; c) co-precipitating acidic and basic precursors, at least one containing aluminium, to form suspension of alumina gel with a targeted alumina concentration; d) filtration; e) drying to a powder; f) forming; g) thermal treatment to an alumina oxide support; h) impregnating of the hydrogenating-dehydrogenating active phase on the alumina oxide support. Catalyst prepared by this process and use of this catalyst for hydrotreating or hydroconverting heavy hydrocarbon feedstocks.

Abstract: A novel alumina gel is described having an elevated dispersibility index, and in particular a dispersibility index greater than 70%, a crystallite size between 1 and 35 nm, and a sulphur content between 0.001% and 2% by weight, and a sodium content between 0.001% and 2% by weight, the weight percentages being expressed in relation to the total mass of alumina gel. The present invention also discloses the method for preparing said gel comprising at least one step of precipitating at least one aluminium salt, at least one step of heating the suspension obtained and a final heat treatment step for forming the alumina gel.

Abstract: A hydroconversion catalyst with a bimodal pore structure: an oxide matrix predominantly of calcined aluminium; a hydro-dehydrogenative active phase of at least one group VIII metal being at least partly commixed within the said oxide matrix mainly made up of calcined aluminium, an SBET specific surface greater than 100 m2/g, a mesoporous median diameter in volume between 12 and 25 nm inclusive, a macroporous median diameter in volume between 250 and 1500 nm inclusive, a mesoporous volume as measured by mercury intrusion porosimeter greater than or equal to 0.55 ml/g and a total measured pore volume by mercury porosimetry greater than or equal to 0.70 ml/g; a method for preparing a residue catalyst for hydroconversion/hydroprocessing by commixing the active phase with a particular alumina, the use of the catalyst in hydroproces sing, including hydroproces sing heavy feeds.

Abstract: An amorphous mesoporous alumina having a connectivity (Z) greater than 2.7 is described. The present invention also relates to the process for preparing the said alumina, comprising at least one precipitation step of at least one aluminium salt, at least one heating step of the suspension obtained, a thermal treatment step to form the alumina gel, a gentle drying step or spray drying step, a moulding step of the powder obtained, and a final thermal treatment step in order to obtain the alumina.

Abstract: An amorphous mesoporous alumina with a median mesopore diameter by volume of 16 nm or more, a mesopore volume of 0.5 mL/g or more, and a total pore volume of more than 0.75 mL/g. A process for preparing said alumina, comprising: a) precipitating a basic precursor and an acidic precursor, at least one of which comprises aluminium, at a pH of 8.5 to 10.5, a temperature of 20° C. to 90° C. and for 2 minutes to 30 minutes, with a state of advance of 5% to 13%; b) heating the suspension; c) a second precipitating by adding another basic precursor and acidic precursor, at least one of which comprises aluminium, at a pH of 8.5 to 10.5, a temperature of 40° C. to 90° C. and for 2 to 50 minutes, with a state of advance of 87% to 95%; d) filtration; e) drying; f) shaping; g) heat treatment.

Abstract: A method for preparing a crystallized solid material of formula LiCl.2Al(OH)3.nH2O with n being comprised between 0.01 and 10, includes mixing in an aqueous medium, at least one source of alumina and at least one source of lithium in order to obtain a suspension, filtering the resulting suspension obtained for obtaining a slurry, followed by drying the obtained slurry and shaping the dried slurry after the drying to obtain a shaped solid material. The shaping is carried out in absence of a binder followed by drying and a hydrothermal treatment to obtain the shaped crystallized solid material of formula LiCl.2Al(OH)3.nH2O. A method for extracting lithium from saline solutions uses the thereby prepared material.

Abstract: A method for preparing a crystallized solid material of formula LiCl.2Al(OH)3,nH2O with n being comprised between 0.01 and 10, includes mixing in an aqueous medium, at least one source of alumina and at least one source of lithium in order to obtain a suspension, filtering the resulting suspension obtained for obtaining a slurry, followed by drying the obtained slurry at a temperature between 20 and 80° C. for a period between 1 h and 12 h, then shaping by extrusion the resulting dried slurry, directly after the drying to obtain extrudates, where the shaping was carried out without any binder, and then the drying of the obtained extrudates at a temperature comprised between 20 and 200° C. for a period between 1 hour and 20 hours, in order to obtain the crystallized solid material of formula LiCl.2Al(OH)3,nH2O as extrudates. A method for extracting lithium from saline solutions uses the thereby prepared material.

Abstract: The present invention concerns spheroidal alumina particles, catalysts comprising such particles as a support and a process for the production of spheroidal alumina particles, comprising the following steps: a) preparing a suspension comprising water, an acid and at least one boehmite powder for which the ratio of the crystallite dimensions in the [020] and [120] directions obtained using the Scherrer X-ray diffraction formula is in the range 0.7 to 1; b) adding a pore-forming agent, a surfactant and optionally water, or an emulsion comprising at least one pore-forming agent, a surfactant and water to the suspension of step a); c) mixing the suspension obtained in step b); d) shaping the spheroidal particles by the oil-drop method using the suspension obtained in step c); e) drying the particles obtained in step d); f) calcining the particles obtained in step e).

Abstract: The present invention concerns an optimized reforming catalyst comprising at least platinum, at least one promoter metal selected from the group formed by rhenium and iridium, at least one halogen, and at least one alumina support with a low sulphur and phosphorus content.

Abstract: The present invention relates to materials and particularly “organometallic-organic-inorganic hybrid materials” that can be used as heterogeneous catalysts for selective catalytic reactions. More precisely this invention relates to organic-inorganic hybrid nanostructured materials comprising a regularly distributed stabilized carbene that binds strongly to a metal so as to form a stable organometallic-organic-inorganic hybrid material having high catalytic performances.

Abstract: The present invention concerns an optimized reforming catalyst comprising at least platinum, at least one promoter metal selected from the group formed by rhenium and iridium, at least one halogen, and at least one alumina support with a low sulphur and phosphorus content.

Abstract: The present invention relates to a process for producing a structured porous material comprising a structured inorganic framework made up of metal-oxide based walls in which nanoparticles of metal 0 are incorporated, which comprises the following steps: a) formation of a suspension of hydrophilic nanoparticles of metal 0 stabilized by non-exchangeable ligands that give the nanoparticles their hydrophilic character; b) growth of the inorganic framework from an inorganic precursor around the nanoparticles of metal 0 stabilized by the non-exchangeable hydrophilic ligands, in the presence of a pore-forming agent; and c) elimination of the pore-forming agent and at least partially of the non-exchangeable ligands that give the nanoparticles their hydrophilic character.

Abstract: The present invention relates to materials and particularly “organometallic-organic-inorganic hybrid materials” that can be used as heterogeneous catalysts for selective catalytic reactions. More precisely this invention relates to organic-inorganic hybrid nanostructured materials comprising a regularly distributed stabilized carbene that binds strongly to a metal so as to form a stable organometallic-organic-inorganic hybrid material having high catalytic performances.