49results about How to "Good hydrodesulfurization" patented technology

The coal tar hydrogenating modification catalyst consists of carrier and active component. The active component is the mixture of WO3, MoO3 and NiO, or the mixture of WO3 and NiO and accounts for 29-35 wt% of the catalyst; and the carrier consists of silica, alumina and modified type-Y molecular sieve, which is modified with zirconium nitrate and/or ammonium salt of phosphorus in the amount of 1-10 wt% of the modified molecular sieve, and accounts for 65-71 wt% of the catalyst. The catalyst has proper pore volume, pore size, hydrogenating center and acid center, relatively high mechanical strength and water resistance. Using the catalyst in hydrogenating modification of coal tar friction oil can eliminate its impurity S, N, gum, asphaltene and saturated arene component and open ring of partial arene.

The invention relates to a multi-metal phosphide nanotube catalyst with evenly distributed catalytic centers and a low-temperature preparation method. The multi-metal phosphide catalyst composite material provided with a hollow nanotube structure, using carbon as the support and provided with the evenly distributed catalytic centers. The method uses a multi-metal metal organic framework material as the template and uses simple low-temperature phosphating reaction (200-350 DEG C) to obtain the multi-metal phosphide catalyst with the nanotube structure. The prepared multi-metal phosphide nanotube catalyst well keeps the morphology of precursors, has large specific surface area and pore volume, has hierarchical pore distribution, has an even and controllable metal doping proportion and phase, is beneficial to electrochemical catalyzing, hydrodesulfurization, selective hydrogenation and other hydrogenation reaction and is promising in application prospect.

The invention relates to a combined hydrotreating method. According to the method, a wax oil raw material enters a first hydrogenation reaction zone with an up-flow manner, such that a hydrotreating reaction is carried out; a reaction effluent from the first hydrogenation reaction zone enters a thermal high pressure separator; liquid-phase material flow from the bottom of the thermal high pressure separator is further separated by a thermal low pressure separator, such that dissolved gas is separated, and the material is directly used as a feed for a catalytic cracking device; hydrogen-rich gas and hydrocarbon fraction separated from the top of the thermal high pressure separator are mixed with a fresh diesel raw material; the mixture is subjected to a hydrogenation modification reaction in a second hydrogenation reaction zone; a reaction effluent from the second hydrogenation reaction zone is separated, such that a hydrogen-rich gas is obtained; and the hydrogen-rich gas is compressed, and is circulated back to the first hydrogenation reaction zone and the second hydrogenation reaction zone. With the method provided by the invention, device equipment investment and operation cost can be effectively reduced, and oil refining process economic efficiency can be improved to a maximal extent.

The invention discloses a liquid-phase circulating hydrogenation treatment method capable of reinforcing gas-liquid mass transfer. The process flow adopted by the method comprises: part of hydrogenation circulating oil and a fresh raw material are mixed to form a liquid-phase mixed material to be filled into supergravity gas-liquid hydrogen dissolution equipment together with hydrogen; through the drive of the high-speed rotation of a feeding rotor, gas-liquid countercurrent full contact is formed; the mixed liquid-phase material in which hydrogen is dissolved is discharge out from the bottom of the supergravity gas-liquid hydrogen dissolution equipment and contacted with a catalyst to undergo a hydrogenation reaction, and part of a liquid phase obtained after reaction is circulated. Compared with the prior art, the method has the advantages that: the rotation of the feeding rotor in the gas-liquid hydrogen dissolution equipment forms a supergravity field, so the gas-liquid mass transfer efficiency is increased greatly, and the liquid phase material can fully dissolve hydrogen; meanwhile, gas impurities such as H2S and NH3 in a reaction system can be removed efficiently, so that the hydrodesulfurization, denitrification, aromatic saturation, cracking and other reactions are promoted.

The invention discloses a preparation method of a vulcanized hydrogenation catalyst. The method comprises the steps as follows: (1) a vulcanizing agent, a vulcanizing aid, an emulsifier and additive particles are uniformly mixed, the mixture is subjected to a constant-temperature reaction, then, an aqueous solution containing hydrogenation active metal is added, the mixture reacts for 5-60 min, the additive particles are removed by separation, and a liquid mixture I is obtained; (2) a peptizing agent, water and urea are uniformly mixed and a liquid mixture II is obtained; (3) an aluminum source is added to an acidic aqueous solution for slurry making, the liquid mixtures I and II are added, and the slurry is mixed uniformly; (4) the slurry in the step (3) is subjected to quick evaporativeconcentration to form concentrated slurry, slow drying treatment is performed, and a semi-dried material is obtained; (5) the semi-dried material obtained in the step (3) is ground, subjected to extrusion molding and roasting, and the vulcanized hydrogenation catalyst is obtained. The catalyst preparation and vulcanizing processes are completed simultaneously, and the catalyst has uniform pore diameter distribution, is simple to prepare and has wider market application prospects.

The invention relates to a method for preparing a Ni2P catalyst with three-dimensional cascade pore structures at low temperature. Under the protection of inert gas, nickel-based metal organic framework materials and hypophosphite are conducted heat treatment at 200-350DEG C for 1-500 min, obtaining a Ni2P catalyst with a three-dimensional cascade pore structure. The method does not need a catalyst or a solvent, the preparation condition is mild, the craft is simple and the method is suitable for industrial production. The prepared Ni2P catalyst has a higher specific surface area(174 m<2>/g) and a bigger pore volume. The internal pore size distribution is 1-50 nm, which distributes as cascade pores. The internal cascade pores are favorable for electrochemical catalysis, hydrodesulfurization, selective hydrogenation and other hydrogenation reactions, and have broad application prospects.

The present invention provides a heavy oil hydrotreating method, the method comprises contacting of heavy oil with a catalyst composition of a heavy oil hydrotreating catalyst I and a heavy oil hydrotreating catalyst II for heavy oil hydrotreating under heavy oil hydrotreating conditions, wherein first the heavy oil is contacted with the heavy oil hydrotreating catalyst I, and then contacted with the heavy oil hydrotreating catalyst II, by calculation of volume on the basis of the total volume of the catalyst composition as a reference, the content of the heavy oil hydrotreating catalyst I in the catalyst composition is 20-60v%, and the content of the heavy oil hydrotreating catalyst II in the catalyst composition is 40-80v%. Compared with conventional heavy oil hydrotreating methods, the heavy oil hydrotreating method has better hydrodesulfurization, demetalization and carbon residue removal effects when used in heavy oil hydrotreating.

The invention discloses a preparation method of a sulfurized type hydrogenation catalyst. The method comprises the following steps: (1) preparing a solution containing a reactive metal complex, performing drying dehydration to obtain a reactive metal precursor, and preparing a semi-sulfurized material from the reactive metal precursor, a sulfurizing reagent and a sulfurizing aid by a mixed reaction; (2) uniformly mixing a peptizer, water and urea to obtain a liquid mixture; (3) adding an aluminum source to an acid aqueous solution, performing pulping, and then adding the semi-sulfurized material and the liquid mixture to the slurry; (4) performing rapid evaporation and concentration on the slurry to obtain concentrated slurry, and then performing slow drying treatment to obtain a semi-dried material; (5) performing rolling and extruding forming on the semi-dried material obtained in step (4), and performing roasting to obtain the sulfurized type hydrogenation catalyst. Catalyst preparation and sulfurization are finished simultaneously, pore size distribution of the catalyst is centralized, the preparation process is simple, and broader market application prospect is provided.

The invention relates to a sulfur-carrying hydrodesulfurization upgrading catalyst. On the basis of weight of the catalyst, content of a molecular sieve in the catalyst is 5-70wt%, VIB-family metal content is 2-10wt% calculated according to oxide, VIII-family metal content is 1-5wt% calculated according to oxide, sulfur content is 3-8wt%, content of a zinc-aluminum lamellar material prepared through non-constant pH alternate titration is 5-50%, and phosphorus content is 0-10wt% calculated according to oxide. The zinc-aluminum lamellar material in the catalyst has large specific surface area, and the sulfur-carrying hydrodesulfurization upgrading catalyst prepared by compositing the zinc-aluminum lamellar material with a molecular sieve material has good hydrodesulfurization and olefin-reducing performance.

The invention provides a method for preparing a macroporous vulcanization-type hydrogenation catalyst through one-step molding. The method comprises (1) uniformly mixing a vulcanization agent, a vulcanization aid and additive granules, keeping the mixture at the constant temperature of 90-150 DEG C for 5-50min, adding an aqueous solution containing a hydrogenation active metal into the mixture, carrying out a reaction process at a temperature of 100-140 DEG C for 5-60min, and separating to remove the additive granules so that a liquid mixture I is obtained, (2) uniformly mixing a peptizing agent, water and urea to obtain a liquid mixture II, (3) carrying out mixing kneading on the liquid mixture I, the liquid mixture II and an aluminum source and extruding the mixture to obtain a wet material, and (4) carrying out ammonia treatment on the wet material, and then freezing, drying and calcining the treated wet material to obtain the vulcanization-type hydrogenation catalyst. The method realizes synchronization of catalyst preparation and vulcanization. The pore distribution of the catalyst is concentrated, the preparation process is simple, the catalytic activity of the catalyst is improved, the preparation cost of the catalyst is reduced, and the application prospect in the market is relatively broad.

The invention provides a heavy oil hydrogenation catalyst. The catalyst comprises a titanium-containing molded alumina carrier, a metal component molybdenum and a metal component cobalt or nickel; the content of titanium (by oxide) in the titanium-containing molded alumina carrier used as a reference is 0.5-8wt%; the content of the metal component molybdenum (by oxide) in the catalyst with the unit carrier surface load as a reference is 4.8-9.0[mu]mol/m<2>, and the content of the metal component cobalt or nickel (by oxide) is 1.5-4.0[mu]mol/m<2>; and no MoO3 characteristic peak appears at a diffraction angle 2theta of 24-28DEG in the XRD characterization map of the catalyst. Compared with heavy oil hydrogenation catalysts, the heavy oil hydrogenation catalyst provided by the invention has better hydrodesulfurization, nitrogen removal and residual carbon removal effects in the heavy metal hydrogenation process.

The present invention provides a heavy oil hydrotreating method, the method comprises contacting of heavy oil with a catalyst composition of a heavy oil hydrotreating catalyst I and a heavy oil hydrotreating catalyst II for heavy oil hydrotreating under heavy oil hydrotreating conditions, wherein first the heavy oil is contacted with the heavy oil hydrotreating catalyst I, and then contacted with the heavy oil hydrotreating catalyst II, by calculation of volume on the basis of the total volume of the catalyst composition as a reference, the content of the heavy oil hydrotreating catalyst I in the catalyst composition is 20-60v%, and the content of the heavy oil hydrotreating catalyst II in the catalyst composition is 40-80v%. Compared with conventional heavy oil hydrotreating methods, the heavy oil hydrotreating method has better hydrodesulfurization, demetalization and carbon residue removal effects when used in heavy oil hydrotreating.

The invention discloses a hydrogenation catalyst and a preparation method and an application of the hydrogenation catalyst in heavy oil suspended bed hydrotreatment. The hydrogenation catalyst comprises a carrier, a metal component molybdenum, at least one non-noble metal component selected from group VIII, and an auxiliary agent component; the auxiliary agent component comprises boron or a composition of boron and phosphorus, the carrier is pseudo-boehmite, and the infrared total acid content of the catalyst at a temperature of 350 DEG C or more is 40-350 [mu]mol/g; when the catalyst is characterized by XRD, no MoO3 characteristic peak appears when 2[theta] is equal to 26 degrees. Compared with the prior art, the catalyst provided by the invention is used for carrying out suspended bed hydrotreatment on heavy oil, and has better hydrodesulfurization and denitrification effects.