40results about How to "Prevent strong interactions" patented technology

The invention discloses a compound base of a precious metal nanometer array and single layer graphene and a preparation method thereof. The invention includes transferring the single layer graphene prepared by a chemical vapor deposition method to the precious metal nanometer array, keeping warm for 30 minutes under the temperature of 50 DEG C, firmly combining the single layer graphene and the precious metal nanometer array to form the compound base of the precious metal nanometer array and the single layer graphene. The preparation method is simple and easy to operate and low in raw material price. The obtained compound base is order in large area. The compound base can be applied to photoelectron devices and the fields of surface enhanced raman chips, thin film solar batteries and the like.

The invention discloses a preparation method of high-activity hydrodemetalization catalyst for residuum. The method comprises the following steps: (1) dipping a formed alumina carrier with polyol and / or monosaccharide aqueous solution, and conducting hydrothermal carbonization treatment in a sealed container after dipping; (2) drying the alumina carrier subjected to hydrothermal carbonization treatment in the step (1), loading active components Mo and Ni, and then drying again; and (3) roasting the alumina loaded with active components obtained in the step (2) in nitrogen atmosphere, and then roasting in the air atmosphere to finally prepare the hydrodemetalization catalyst for residuum. The active components of the catalyst prepared by the method distributes uniformly on the carrier, have weak interaction with the carrier, and are easy for full sulfuration, so as to significantly improve the metal removal and desulfurization activity of the catalyst.

The invention discloses a high-activity flue gas desulfurization catalyst and a preparation method thereof. The catalyst comprises an aluminum oxide carrier, active metals and carbon. Based on the weight of the catalyst, and the active metals being measured based on oxide, the weight content of Mo and/or W is 6.0-15wt%, and the weight content of Co and/or Ni is 1.0-4.0wt%. Being measured based on element, the weight content of carbon is 1-15wt%, and preferably 5-10wt%. The carbon content gradually decreases from the center to the outer surface of catalyst particles. The preparation method comprises the following steps: at least two polyol and/or monosaccharide water solutions are prepared; the solutions are sprayed onto an aluminum carrier with a sequence of high concentration to low concentration; a hydrothermal charring treatment is carried out in a sealed container; drying is carried out; active component impregnation is carried out; and drying is carried out; anaerobic high-temperature treatment is carried out, such that the flue gas desulfurization catalyst is obtained. The carbon content in the catalyst has a gradient distribution, and the active component can easily be fully sulfurized, such that the desulfurization activity of the catalyst is substantially improved.

The invention discloses a preparation method of a hydrogenation treatment catalyst. The preparation method includes the following steps: 1) impregnation an alumina carrier in an urea water solution, and drying the impregnated alumina carrier; 2) preparing polyol and/or monosaccharide water solutions in at least two different concentrations, and spray-impregnating the alumina carrier with the water solutions according to the sequence of high concentration to low concentration to form a low-to-high gradient distribution of concentrations of the polyol and/or monosaccharide from exterior to interior of the carrier, and performing hydrothermal treatment to the material; 3) drying the alumina carrier in the step 2), and impregnating the alumina carrier in an impregnating liquid containing active components, and performing hydrothermal treatment to the impregnated alumina carrier; and 4) drying the material in the step 3) and performing oxygen-free high-temperature treatment to prepare the catalyst. The content of carbon in the catalyst is distributed in a gradient manner, so that active components are easy to sulfurize completely. The active metal components are uniformly distributed on the surface of the carrier, so that the catalyst is significantly improved in demetalization activity.

The invention discloses a hydrotreating catalyst and a preparation method and application thereof. The preparation method of the hydrotreating catalyst comprises the steps that (1), an alumina carrieris prepared or selected; (2) the alumina carrier prepared or selected in step (1) is dipped with a nitrogenous organic acid solution or an aromatic carboxylic acid solution; (3) the alumina carrier dipped with a pyridinedicarboxylic acid solution or the aromatic carboxylic acid solution in step (2) is subjected to low temperature drying treatment; and (4) the alumina carrier subjected to low temperature drying treatment in step (3) is dipped with an active component solution or active metal and an assistant, high temperature thermal treatment is conducted after dipping, and the hydrotreatingcatalyst is prepared. The catalyst prepared by adopting the method is high in metal component dispersity and sulfidity, and is liable to be sufficiently vulcanized, the number of generated active sites is large, improvement of the activity of the catalyst is facilitated, meanwhile, the preparation method is simple, and the production cost is low.

The invention discloses a hydrogenation catalyst, a preparation method thereof, and a method used for preparing of o-diamino methyl cyclohexane. According to the hydrogenation catalyst, a gamma-Al2O3and Mg2Si composite carrier is taken as a carrier, and the active components are NiO and CuS. The hydrogenation catalyst can be used for o-diaminotoluene hydrogenation preparation of o-diamino methylcyclohexane, and is high in activity, selectivity, and stability; raw material conversion rate is 100%, product yield is higher than 98%; the selectivity on deamination products and secondary amine products is inhibited. The hydrogenation catalyst is capable of realizing 5000h long term operation, and catalyst activity is almost not changed, so that production cost is reduced greatly.

The invention discloses a preparation method of a carbon-containing residual oil hydrodemetallization catalyst. The preparation method includes the following steps: 1) preparing polyol and/or monosaccharide water solutions in at least two different concentrations, and spray-impregnating an alumina carrier with the water solutions according to the sequence of high concentration to low concentration to form a low-to-high gradient distribution of concentrations of the polyol and/or monosaccharide from exterior to interior of the carrier; 2) performing hydrothermal carbonization treatment to the impregnated alumina carrier in a sealed container and then drying the carrier; 3) impregnating the carrier in the step 2) with an impregnation liquid containing active metal components, placing the impregnated wet material in a pressure-resistant container, and feeding ammonia gas to perform stepwise treatment; and 3) drying the material treated in the step 3) and performing oxygen-free high-temperature treatment to prepare the catalyst. The content of carbon in the catalyst is distributed in a gradient manner, so that active components are easy to sulfurize completely, and the catalyst is significantly improved in demetallization and desulfurization activities.

The invention provides a preparation method of a carbon-containing macroporous alumina carrier. The preparation method comprises the following contents: (1) mixing and pulping pseudo-boehmite and deionized water, adding a proper amount of mixed acid solution of an organic acid and an inorganic acid to the slurry and carrying out heating reflux treatment; (2) adding a proper amount of urea for hydro-thermal treatment, carrying out washing and drying, and molding, drying and roasting the treated pseudo-boehmite to obtain an alumina carrier; (3) preparing at least two polyol and/or monosaccharide water solutions of different concentration, spraying the water solutions to the alumina carrier obtained in the step (2) according to the concentration order from high to low; and (4) carrying out hydrothermal carbonization treatment on the alumina carrier dipped in the step (3) and then drying to obtain the carbon-containing macroporous alumina carrier. The alumina carrier prepared through the method has relatively large pore volume and pore diameter, the carbon content is in uneven distribution in the radial direction of the carrier, and the carrier is suitable for the field of preparation of heavy oil or residual oil hydrodemetallization catalysts.

The invention discloses a preparation method for a high-activity flue gas desulfurization catalyst. The method comprises the following steps: (1) impregnating a porous inorganic refractory oxide carrier into an aqueous solution containing polyol and/or monosaccharide, transferring an impregnated material into a sealed container for hydrothermal treatment, and carrying out drying; (2) impregnating the porous inorganic refractory oxide carrier into a urea aqueous solution, and subjecting the carrier to drying treatment for subsequent usage; (3) impregnating the porous inorganic refractory oxide carrier obtained in the step (2) into an impregnating liquid containing active metal components, transferring the impregnated porous inorganic refractory oxide carrier into the sealed container, and carrying out hydrothermal treatment again; and (4) subjecting the material obtained in the step (3) to drying, and carrying out anaerobic high-temperature treatment so as to obtain the high-activity flue gas desulfurization catalyst. The catalyst prepared by using the method provided by the invention has the following advantages: the active metal components are uniformly distributed, have weak action with the carrier, are easy to be completely sulfurized, and significantly improve desulfurization activity of the catalyst.

The invention discloses a hydrodemetallization catalyst with high activity and a preparation method thereof. The catalyst comprises an aluminum oxide carrier, active metals and carbon. The catalyst comprises the following components based on the weight of the catalyst in percentages by weight: 6.0-15% of Mo and/or W, 1.0-4.0% of Co and/or Ni, wherein the active metals are calculated based on oxides, 1-15% of carbon, preferably 5-10% of carbon, wherein the carbon is calculated based on carbon element; carbon content is gradually reduced from the center to the external surface of a catalyst particle. The preparation method is as follows: aqueous solutions of polyol and/or monosaccharide of at least two different concentrations are prepared; the aqueous solutions are sprayed on the aluminum oxide carrier for dipping according to a sequence from a high concentration to a low concentration; hydro-thermal carbonization treatment is carried out in a sealing container, drying is carried out, active components are used for dipping, drying is carried out, anoxic high-temperature treatment is carried out, and the hydrodemetallization catalyst is carried out. The carbon content in the catalyst is distributed in gradient distribution, complete sulfuration for active components is easy, and demetalization and desulphurization activities of the catalyst are substantially improved.

The invention discloses a method for preparing a high-activity residual oil hydrodemetalation catalyst. The method comprises the following steps: 1) at least two polyol and/or monosaccharide aqueous solutions with different concentration are prepared, according to a decreasing concentration sequence, spray leaching is carried out on an alumina carrier, increasing gradient distribution of the polyol and/or monosaccharide concentration on the carrier from outer to inner; 2) hydro-thermal charing processing is carried out on the dipped alumina carrier in a sealed container, and then is dried; and 3) an active ingredient and urea-containing aqueous solution is used for dipping the alumina carrier in the step 2), the dipped material is converted to the sealed container for hydro-thermal processing, then is dried, and is performed with anoxic high temperature processing to obtain the hydrodemetalation catalyst. The carbon content in the prepared catalyst presents gradient distribution, the active ingredient is easily and completely sulfurated, distribution of the active metal ingredient on a surface is uniform, and the demetallization activity of the catalyst is obviously increased.

The invention discloses a high-activity flue gas desulfurization catalyst and a preparation method thereof. The catalyst of the invention contains a silicon-containing alumina carrier, active metal and carbon. With weight of the active metal as the benchmark, content of active metal is 5-20 wt% metered based on oxide, content of carbon is 1-15 wt% metered based on elements and content of the silicon-containing alumina carrier is 70-93 wt%. With weight of the silicon-containing alumina carrier as the benchmark, content of silica is 1-10 wt%. Specific surface area is 160-300 m<2>/g. Pore volume is 0.4-1.2 ml/g. The preparation method comprises the following steps: preparing at least two polyols and/or monosaccharide aqueous solutions with different concentrations, spraying the polyols and/or monosaccharide aqueous solutions onto the silicon-containing alumina carrier from high concentration to low concentration, carrying out hydro-thermal carbonization treatment in a sealed container, drying, immersing the active component, drying, and carrying out anoxic high-temperature treatment to obtain the flue gas desulfurization catalyst. The content of carbon in the catalyst is in graded distribution. The active component is easy to completely vulcanize. Desulfurization activity of the catalyst is remarkably raised, strength of the catalyst is high, and long-term operation can be stabilized.

The invention provides a preparation method of a carbon-containing alumina carrier. The preparation method comprises the following contents: (1) dipping pseudo-boehmite dry glue powder into a water solution containing polyols and/or carbohydrates, carrying out hydrothermal carbonization treatment on the dipped material, and molding, drying and roasting the treated pseudo-boehmite to obtain an alumina carrier; (2) preparing at least two polyol and/or monosaccharide water solutions of different concentration, spraying the water solutions to the alumina carrier obtained in the step (1) according to the concentration order from high to low; and (3) carrying out hydrothermal carbonization treatment on the alumina carrier dipped in the step (2) in a closed container and then carrying out drying treatment to obtain the carbon-containing alumina carrier. The alumina carrier prepared through the method has relatively large pore volume and pore diameter, the carbon content is in gradient distribution in the radial direction of the carrier, and the carrier is suitable for the field of preparation of heavy oil or residual oil hydrodemetallization catalysts.

The invention discloses a hydrocracking catalyst and a preparation method thereof, wherein the catalyst comprises an acidic component, a hydrogenation metal component and a carrier, and the acidic component is a heteropolyacid ammonium salt. The invention further provides a preparation method of the hydrocracking catalyst, wherein the preparation method comprises: modifying an alumina carrier, andsupporting an acidic component and an active component. According to the present invention, the catalyst obtained by the method exhibits high reactivity and high liquid-state hydrocarbon selectivityin the hydrocracking reactions of long-chain alkanes.