32results about How to "Suitable pore structure" patented technology

The invention discloses a diesel oil hydrogenation pour point depressing method. A series flow of hydrofining and hydrogenation pour point depressing is adopted in the method, wherein a hydrogenation pour point depressing catalyst is modified by metal auxiliary agent and silicon, effectively regulates the acidity and orifice shape of the inner surface and the outer surface of a shape-selective cracking molecular sieve, is favorable for dispersing wax molecules in a diesel oil raw material into pore canals of the molecular sieve to perform shape-selective cracking reaction, and has high catalytic activity and selectivity of a target product; and because the acidity of the outer surface of the molecular sieve is weak, side reactions such as secondary cracking and the like are reduced, the pour point depressing effect of the diesel oil is good, and the fraction yield of the diesel oil is high.

The invention relates to an iron group fischer-tropsch synthesis catalyst and its preparation method. The iron group fischer-tropsch synthesis catalyst comprises the components of Fe, Cu, K, Li and SiO2 with weight proportion of 100:0.1-15:0.1-10:0.05-10:2-50. On the premise of good fischer-tropsch synthesis activity and methane selectivity, the iron group fischer-tropsch synthesis catalyst is capable of reducing water gas shift reaction activity in a system and enhancing the effective utilization rate of CO reaction gas.

The invention discloses a hydro-dewaxing catalyst and a preparation method and application thereof. The hydro-dewaxing catalyst comprises a carrier modified by a metal aid and silicon, and is prepared by the following steps of: supporting the metal aid by using a conventional carrier impregnation method, modifying by using silicon oil, and forming a silica coating on the surface of the carrier. The method can effectively regulate the acidity and pore shapes of the inner surface and the outer surface of a molecular sieve to contribute to diffusing wax molecules into the pores of the molecular sieve for shape-selective cracking reaction, and ensures higher catalytic activity and higher selectivity for target products; in addition, the acidity of the outer surface of the molecular sieve is lower, the cracking capacity is low, and the side reaction of the target products is reduced. The hydro-dewaxing catalyst is suitable for the hydro-dewaxing process for wax-containing raw materials, particularly the diesel hydro-dewaxing or lubricating oil hydro-dewaxing process.

The invention relates to an in situ type molecular sieve hydrogenation cracking catalyst and a method for preparing the same. The in situ type molecular sieve hydrogenation cracking catalyst contains a hydrogenation activity metallic component and a cracking activity component, wherein the cracking activity component comprises a Y type molecular sieve obtained by in situ crystallization synthesis, the weight of the in situ type molecular sieve cracking component is 10 to 90 percent of that of the hydrogenation cracking catalyst, the specific surface of the hydrogenation cracking catalyst is between 150 and 500m<2>/g, the pore volume is between 0.2 and 0.4ml/g, and the pore volume with mesoporous structure which is between 2 and 10nm is over 40 percent of the total pore volume. The common impregnation method is adopted in the process of preparing the catalyst. When the hydrogenation cracking catalyst is used for the hydrogenation of heavy hydrocarbons, the catalyst has the characteristics of high activity, good selectivity, good product quality and the like.

The invention discloses a preparation method of a three-dimensional ordered macroporous carrier loaded heteropoly compound catalyst and belongs to the technical field of preparation of catalysts. The preparation method comprises the following steps of: adding tetraethoxysilane, a vanadium-containing compound and hydrochloric acid into a polystyrene colloidal crystal template; immersing and calcining the template to obtain a VOx-SiO2 three-dimensional ordered macroporous carrier; modifying the carrier; and finally, introducing a heteropoly compound to obtain the three-dimensional ordered macroporous carrier loaded heteropoly compound catalyst. According to the preparation method of the three-dimensional ordered macroporous carrier loaded heteropoly compound catalyst, disclosed by the invention, the catalyst has a proper duct structure and a relatively large specific surface area, so that the diffusing process of reactants and products is facilitated; and the oxidation-reduction quality of the catalyst can be improved by doping vanadium in the carrier, so that the catalyst shows high activity and high selectivity in catalyzing the oxidizing reaction of methylacrolein.

The invention discloses a preparation method of a poisoning-resistant catalyst for unsaturated oil hydrogenation. The preparation method is characterized by comprising the following steps of 1, putting an alkaline precipitator solution into a reactor, and heating to a temperature of 60 to 70 DEG C, 2, adding a mixed solution of a soluble nickel salt, a ferric salt and a rare earth salt into the heated alkaline precipitator solution with stirring in a period of 1 to 2 hours, 3, then fast adding alumina carriers into the mixed solution obtained by the steps 2, stirring for 0.5 to 1 hour, filtering, and washing by deionized water until acid radical ions are removed completely, and 4, drying at a temperature of 110 to 120 DEG C for 4 to 5 hours, crushing, and carrying out hydrogen feeding at a temperature of 400 to 500 DEG C for 2 to 3 hours to obtain the poisoning-resistant catalyst for unsaturated oil hydrogenation, wherein an Ni/Fe atomic ratio of the soluble nickel salt to the ferric salt is in a range of 5 to 25 and the poisoning-resistant catalyst for unsaturated oil hydrogenation contains 30 to 50 wt% of nickel, 2 to 5 wt% of iron, 0.5 to 1.0 wt% of a rare earth salt of cerium and 0.5 to 1.0 wt% of a rare earth salt of lanthanum.

A catalyst for catalytic cracking to prepare olefins, a preparing method thereof and applications of the catalyst are disclosed. The catalyst includes, by weight, 5-30% of an alkaline earth metal-modified MFI molecular sieve and 0.1-3% of heteropoly acid, with the balance being SiO2, wherein the weight of the alkaline earth metal is 0.5-2% of the weight of the MFI molecular sieve. The preparing method includes (1) weighing a proper amount of the heteropoly acid, dissolving the heteropoly acid into water and fully stirring the solution, (2) adding a proper amount of an ethanol solvent and a proper amount of a silicon-containing precursor into the solution obtained in the step (1), fully stirring the solution, and adjusting the pH value of the solution to be 1-7, (3) adding the alkaline earth metal-modified MFI molecular sieve into the solution in the step (2), fully stirring the solution at a constant temperature, then adding an ionic liquid, and continuously stirring the solution until the solution is converted into sol, and then performing room-temperature ageing to obtain gel, and (4) drying the gel in the step (3) until the weight is constant and grinding the dried gel to obtain the catalyst for catalytic cracking. The catalyst has advantages of a high olefin yield, low reaction temperatures, good catalyst stability, and the like.

The invention belongs to the technical fields of environmental pollution control and clean coal combustion, and concretely relates to a high-performance porous calcium-based absorbent. The high-performance porous calcium-based absorbent comprises calcium source powder and biomass powder, and the biomass powder is pyrolyzed and volatilies when the calcium-based absorbent is calcined at a high temperature in order to form a porous structure in the biomass powder. The invention also discloses a preparation method of the calcium-based absorbent. Pores formed by the pyrolysis and volatilization of the cellulose-rich biomass powder are used to improve the adsorption capacity and the cycle stability of the calcium-based absorbent, so the prepared spherical calcium-based absorbent is suitable for capturing CO2 in a fluidized bed system; the characteristic of low cost of biomass is fully used in the whole preparation process, and the preparation method also has the advantages of high efficiency, high quality, low cost and convenience in control, so the method is especially suitable for being used in large-scale batch production.

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 discloses a method for preparing a catalyst by hydrotreatment. The method comprises the following steps: gelatinizing aluminum hydroxide and adding a stable boron-containing organic compound solution, introducing a boron auxiliary agent to obtain the boron-containing aluminum hydroxide, mixing active metal ingredients with boron-containing aluminum hydroxide by a wet-mixing-kneadingmethod, three-segment roasting to obtain a catalyst intermediate, dipping the residual partial active metal and loading on the catalyst intermediate, drying to obtain the hydrotreatment catalyst. According to the invention, the boron auxiliary agent and the active metal ingredients are uniformly distributed on the surface of the catalyst, active metal ingredients introduced by two modes has different forms in the catalyst, mutual cooperation enables reduction of activity loss rate of the catalyst, and the running period of the apparatus can be prolonged. The catalyst has the characteristics of large pore volume and large specific surface area, and possesses proper pore structure and acidity, is especially suitable for hydrodenitrogenation process of heavy hydrocarbon.

The invention discloses a preparation method of a boron-containing alumina carrier. The method comprises the following steps of: gelling the conventional aluminum hydroxide; adding into a stable boron-containing organic compound solution; aging, filtering, washing and drying to obtain dry boron-containing aluminum hydroxide gel; mixing and molding with an adhesive; and heating and performing gradual programmed heating and baking to obtain the boron-containing alumina carrier. Boron-containing alumina is a high-performance carrier component, which can be used for providing a large pore volume and a large specific surface area, has an appropriate pore structure and acidity, and is particularly suitable for a catalyst material needed by a heavy hydrocarbon catalytic processing process.

The invention relates to a method for preparing high acid value oil hydrogenation catalyst. The method comprises the following steps: making macro-pore-volume aluminum oxide as a carrier; making nickel and iron as active components; and making magnesium as auxiliary agent so as to prepare catalyst. A catalyst preparation method is characterized by simple operation, easy filter, high activity and good selectivity; compared with other kindred catalyst, the use quantity of the catalyst is reduced by 15-20%.

The invention discloses a hydrodewaxing catalyst as well as a preparation method and application thereof. The hydrodewaxing catalyst is prepared by using a carrier modified with alkaline-earth metals and silicon. The carrier is modified through the following steps: firstly loading the alkaline-earth metals onto the carrier by a traditional carrier immersion method; and then modifying the carrier with silicon oil to form a silica coating on the surface of the carrier. By utilizing the method, the acidity of internal and external surfaces of a molecule sieve and the shape of holes can be effectively adjusted, thereby being beneficial for wax molecules to diffuse into the hole paths of the molecule sieve and be subjected to a shape-selective cracking reaction. Thus the catalyst provided by the invention has the advantages of higher catalyst activity and better target product selectivity. Moreover, due to the weak acidity of the external surface of the molecule sieve and low cracking capacity, the side reaction in the preparation of the target products are reduced. The catalyst is suitable for the hydrodewaxing process of wax-containing raw materials, especially for a hydrodewaxing process of diesel oil or lubricating oil.

The invention relates to a periosteum material with a tissue oxygenation function as well as a preparation method and an application of the periosteum material. The preparation method comprises the following steps: preparing PLGA (Poly(Lactic-Co-Glycolic Acid)) wrapped PFOB (Perfluorooctyl Bromide) granules, preparing an electrostatic spinning liquid, and preparing a periosteum material. All raw materials used in the periosteum material are approved medical materials in service, and through specific process steps, the periosteum material has a specific functional and is high in security; the periosteum material provided by the invention has an oxygenation function, the problem that an artificial periosteum is insufficient in blood supply in a primary transplanting period relative to a selfperiosteum is solved, essential oxygen is supplied to cell proliferation, and the speed of tissue healing is increased; and the periosteum prepared by using an electrostatic spinning method is of anappropriate pore structure, is beneficial to bone cell growth and bone tissue repairing and is simple in process and easy to transfer.

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 belongs to the field of preparation of environmental materials, and provides a preparation method and application of an adsorption and degradation material. The preparation method comprises the step: taking chitosan as a raw material; adding glacial acetic acid into a chitosan solution to obtain hydrogel; slowly dropwise adding the hydrogel into liquid nitrogen and carrying out rapidfreezing; freezing and drying to obtain aerogel; calcining the obtained aerogel at a high temperature in a nitrogen or argon atmosphere to obtain a first calcined product; and adding the primary calcined product and KOH into water according to a mass ratio of 1:1-1:3 to obtain a uniformly mixed suspension, drying to obtain a dried product, carrying out secondary high-temperature calcination on the dried product in a nitrogen or argon atmosphere, washing with diluted hydrochloric acid, deionized water and absolute ethyl alcohol, and drying to obtain the adsorption and degradation material. Theobtained material has a relatively high specific surface area, can be used for catalytic degradation of rhodamine B without depending on a heavy metal catalyst, does not cause secondary pollution tothe environment, and has a relatively good catalytic degradation effect and good cyclicity.

A sulfur-doped catalytic slurry oil-based porous carbon material and a preparation method thereof are provided, belonging to the field of comprehensive utilization of catalytic cracking slurry oil andfunctional carbon materials. The technical problem to be solved by the invention is the current problem of deep processing and utilization of catalytic slurry oil. The method comprises the steps of adding a certain volume of cyclohexane to catalytic slurry oil under the heating condition, stirring until the catalytic slurry oil is uniform, filtering under vacuum, distilling the filtrate under reduced pressure, adding a certain amount of pore-forming agent to the clarified oil, stirring uniformly under the ultrasonic heating condition, heating a heating furnace to a certain temperature under the protection of inert gas, injecting the prepared mixture into the heating furnace through an injector for pyrolysis reaction to obtain pyrolysis products, elemental sulfur and carbon disulfide, stirring for a certain time under the ultrasonic condition, filtering under vacuum, collecting insoluble matters, and drying to obtain a sulfur-doped catalytic slurry oil-based porous carbon material. Thematerial is used to alleviate the volume effect of a sulfur positive electrode.

The invention belongs to the field of gasoline dearsenification agents, and particularly relates to a preparation method of a low-temperature FCC (fluid catalytic cracking) gasoline dearsenification agent. The preparation method comprises the following steps of: (1) dropwisely adding completely dissolved sodium silicate and manganese salt, mixing, and uniformly stirring; (2) stirring and aging themixed solution for 2-12 hours, washing, filtering, and calcining in a muffle furnace at 350-400 DEG C for 2-12 hours to obtain a manganese silicate catalyst precursor; and (3) adding an adhesive, kneading, extruding and molding to obtain the target product, namely the low-temperature FCC gasoline dearsenification agent. The target product provided by the invention has large specific surface areaand arsenic capacity and high arsenic removal selectivity, and does not cause side reaction of unsaturated hydrocarbon in gasoline or gasoline octane number loss in the arsenic removal process.

The invention discloses a desulfurization adsorbent as well as a preparation method and an application thereof, and belongs to the technical field of methyl tert-butyl ether desulfurization. The desulfurization adsorbent comprises a supported cadmium-based compound, the supported cadmium-based compound comprises an active component and a carrier, and the active component is supported on the carrier; the active component comprises an active component I, and the active component I is cadmium oxide. The supported cadmium-based composite metal oxide can be used as an adsorbent for methyl tert-butyl ether mercaptan removal to overcome the technical defects of low mercaptan removal efficiency, high cost, difficulty in reduction of total sulfide content and the like in the existing methyl tert-butyl ether mercaptan removal.