63results about How to "Play a role in expanding holes" patented technology

The invention discloses a microspherical ethylene oxychlorination catalyst preparation method, which comprises the following six steps: solution preparation; precipitation and reaction; peptization; active component and assistant component homogenization; spray forming; and post-treatment. Solution of an active component and solution of an assistant component are dissolved in peptized pulp; a proper amount of dispersant and pore-expanding agent are added into the pulped sol solution to ensure the active component and the assistant component are uniformly distributed in the sol solution; the dispersant can prevent active and assistant component deposition caused by the prolongation of spray time; and the added proper amount of pore expanding agent can expand formed pore passage with a microspherical structure in a spraying process of the sol solution so as to improve the volume of the pore passage of a catalyst carrier and improve the pore volume and specific area of the catalyst.

The invention relates to a method for hydrorefining petroleum wax. According to the invention, alumina is used as a carrier of a hydrorefining catalyst, and an active component in the catalyst is one or two selected from the group consisting of NiO, MoO3 and WO3, wherein, the content of NiO accounts for 2 to 7% of the total weight of the catalyst, and the content of MoO3 and / or WO3 accounts for 20 to 32% of the total weight of the catalyst; the content of SiO2 accounts for 1 to 9% of the total weight of the catalyst, and the content of P2O5 accounts for 1 to 7% of the total weight of the catalyst; the catalyst has a specific surface area of 120 m<2> / g to 190 m<2> / g, a pore volume of 0.30 ml / g to 0.55 ml / g, pores with a pore diameter of 5 nm to 14 nm account for 40 to 70% of the whole pore volume, and pores with a pore diameter of 20 nm to 40 nm account for 20 to 40% of the whole pore volume; the alumina carrier has a double-peak pore structure, the pore wall of a macroporous tunnel has weak surface acidity, and pore wall of a microporous tunnel has strong surface acidity.

The invention discloses a catalyst carrier for coal liquification oil hydrogenation on boiling bed and the preparation method. Besides normal hydrogenation catalyst carrier component, the catalyst aslo contains aluminium oxide fiber, the content of which in carrier is 3- 10wt%. The mechanical strength and wearing resistance of catalyst are strong, which increases carrier stability and life length and reduces production cost. The active aluminium oxide utilization can increase the hydrogeneration activity and stability.

The invention discloses a process of hydrogenation for coal liquification oil on boiling bed. The process employs hydrogenation catalyst which contains fiber adjuvant, the fiber adjuvant content in catalyst is 3- 10 wt%. The mechanical strength and wearing resistance are strong, so it can remove nitrogen and sulfur from coal liquification oil maximumly, reduces olefin and aromatic hydrocarbons content, increases product stability and provides high performance coal liquification solvent oil.

The invention discloses a catalyst for coal liquification oil hydrogenation on boiling bed and the preparation method. Besides normal hydrogenation catalyst, the catalyst aslo contains silicon oxide fiber, the content of which in catalyst is 3- 10wt%. The mechanical strength and wearing resistance of catalyst are strong, which increases catalyst stability and life length. It can remove nitrogen and sulfur from coal liquification oil maximumly, reduces olefin and aromatic hydrocarbons content, increases product stability and provides high performance coal liquification solvent oil.

The invention relates to a preparation method of a spherical silicon-aluminum composite carrier. The preparation method is characterized by comprising the following steps: adding silicon dioxide to an alumina gel, and uniformly mixing; slowly adding to an alginate solution, and uniformly stirring to prepare suspension slurry; dropping the suspension slurry into a multivalent metal cation solution to form a spherical composite gel granule; taking out the spherical composite gel granule, and drying and calcining to obtain the spherical silicon-aluminum composite carrier, wherein the alumina gel is an alumina hydrogel or a nano-alumina sol, the addition amount of the silicon dioxide is 0.1-0.3 time more than the weight of the alumina gel in terms of Al2O3, the suspension slurry contains 5%-25% by weight of solids and 0.3%-5% by weight of alginate, the soluble alginate is one or more of sodium alginate, potassium alginate, magnesium alginate and ammonium alginate, and the multivalent metal cation solution is an aluminum, zinc, calcium, copper, iron, ferrous iron, cobalt, manganese or nickel ion salt solution with the saturation concentration of 0.1 mol / L. The spherical silicon-aluminum composite carrier obtained through the preparation method disclosed by the invention has the advantages of high strength, large pore volume and low bulk density.

The invention discloses a residual oil hydrodemetallization catalyst and a preparation method thereof. The method comprises the following steps: (1) impregnating an impregnation liquid I containing afirst active metal component in a physical pore-enlarging agent, and then drying to prepare a modified physical pore-enlarging agent; (2) mixing, kneading and molding the modified physical pore-enlarging agent obtained in the step (1), pseudo-boehmite and a second active metal component source, drying and roasting to obtain a modified aluminum oxide carrier SI; (3) immersing the modified alumina carrier SI obtained in the step (2) into an ammonium bicarbonate solution, then carrying out sealed heat treatment, and drying and roasting a material obtained through heat treatment to obtain a modified alumina carrier SII; and (4) impregnating the modified alumina carrier SII obtained in the step (3) with an impregnation liquid II containing a third active component, and carrying out drying and roasting so as to obtain the hydrodemetallization catalyst. The hydrodemetallization catalyst prepared by the method has high activity and activity stability when used as a heavy oil hydrodemetallization catalyst.

The invention discloses a hydrogenation catalyst and a preparation method thereof. The preparation method comprises the steps of dissolving iron-containing inorganic salt and ammonium citrate salt inwater, and obtaining a solution A; carrying out ball forming on the small-pore aluminum oxide, adding the solution A to obtain aluminum oxide A, putting the aluminum oxide A into a ball rolling machine, and uniformly adding the large-pore aluminum oxide and the solution A in the rolling process to obtain aluminum oxide B; treating and drying the aluminum oxide B to obtain aluminum oxide C; and loading an active metal component to obtain the catalyst. The catalyst obtained by the method provided by the invention has non-uniform pore distribution, not only has relatively high hydrodemetallization activity and capacity of accommodating impurities such as metal, but also has relatively high desulfurization activity, is not easily blocked by the impurities such as metal, and can ensure the stability of the catalyst in a long-period operation process of a device.

The invention discloses a preparation method of a diatomite / molecular sieve composite material for adsorbing volatile organic pollutants. The preparation method is characterized in that diatomite as asuperior mineral resource of Jilin province is taken as a raw material, and the surface and pores of the diatomite are modified by using strong acid and strong alkali, so that the purity of the diatomite is improved, and the aperture is enlarged through dissolution so as to prevent the pores from being blocked and improve the zeolite load rate. Then, a nano zeolite seed crystal is loaded on the surface of the modified diatomite, and a dense nano zeolite membrane further grows on the surface of the diatomite through hydrothermal treatment. Compared with original diatomite, the prepared diatomite / molecular sieve composite material has the advantages of great improvement on the aspects of specific surface area and pore volume, and good adsorption effect on volatile organic pollutants such asacetone, ethyl acetate and methylbenzene. As proved by the experiment result, the diatomite / molecular sieve composite material has the advantages of selective adsorption. Moreover, the material can be widely applied to industrial production by being prepared into particle adsorbents with clay.

The invention discloses a hydrotreating catalyst carrier, a catalyst and a preparation method thereof. The preparation method of the carrier comprises the following steps: subjecting pseudo-boehmite powder A to pelletizing forming, meanwhile, spraying an ammonium phosphate aqueous solution, and obtaining a carrier precursor A; putting the carrier precursor A into a ball rolling machine, and uniformly adding pseudo-boehmite powder B and an ammonium phosphate aqueous solution in the rolling process to obtain a carrier precursor B; pre-treating the carrier precursor B with steam-containing gas toobtain a carrier precursor C, and then drying and roasting the carrier precursor C to obtain the carrier; and further loading a hydrogenation active metal component on the obtained carrier to obtainthe catalyst. The prepared catalyst has high hydrogenation demetalization activity and metal and other impurity capacity, also has high desulfurization activity, is not easily blocked by metal and other impurities, and can ensure the stability of the catalyst in the long-period operation process of a device.

The invention belongs to the technical field of fruit tree planting equipment and in particular discloses peach tree planting equipment. The peach tree planting equipment comprises a rack, wherein a mounting seat is arranged on the upper part of the rack; a servo motor with a downward output shaft is arranged on the mounting seat; the output shaft of the servo motor is rotationally connected withthe rack; a drill bit is arranged on the output shaft of the servo motor; a rotating disc is fixedly connected onto the servo motor; multiple vertical rods are arranged on the rack; supporting rods are arranged on the lower parts of the vertical rods; torsional springs are arranged between the supporting rods and the vertical rods; scrapers are arranged on the supporting rods; push plates are arranged on the supporting rods; bulges are formed on the rotating disc; supporting columns are arranged at the lower end of the rack; a supporting plate is arranged at the lower end of each supporting column; and a spring is connected between each supporting column and the inner wall of the cavity structure. The equipment disclosed by the invention is mainly used for peach tree planting and hole digging, and the problem that soil easily slides into holes to influence peach tree planting if soil produced during hole digging is not transferred away from the holes can be solved.

The invention discloses a process for preparing a hydrocracking catalyst. A method for the process includes the following steps: (1) adopting the mixing kneading method to prepare a hydrocracking catalyst containing a group VIII metal based organic acid salt, and processing wet materials through vapor after formation; (2) preparing a high-concentration metallic solution containing group VIB hydrogenation active constituents; (3) adding the catalyst, containing the group VIII metal, processed through vapor in step (1) into the metallic solution prepared in step (2) for dipping, and then filtering, drying, and roasting to prepare the finished hydrocracking catalyst. The method provided by the invention can be used to prepare the hydrocracking catalyst with high metal dispersion, and the preparation process is clean without NOx emissions.

The invention provides a nickel-carbon catalyst, a preparation method and application thereof in 2,2'-dipyridyl synthesis. The nickel-carbon catalyst takes a carbon material as a catalyst carrier, andtakes any one or a combination of several of nickel or nickel oxides as an active ingredient. The nickel-carbon catalyst has the characteristics of being low in price, high in activity, long in service life and high in selectivity in synthesizing 2,2'-dipyridyl.

The invention discloses a monodispersed iron-based catalyst for Fischer-Tropsch synthesis as well as a preparation method and an application thereof. The catalyst comprises a carrier silicon dioxide and an active component iron, the carrier silicon dioxide has a mesoporous spherical particle structure, the carrier silicon dioxide covers the active component iron, and the active component iron is in nanometer granular shape and is distributed uniformly; the particle size of the carrier silicon dioxide is 140-160nm. In the preparation method, the pressure of CO2 is adjusted, the morphology of the catalyst is changed into uniform spherical shapes from disc shaped accumulation, so that the iron nanometer particles are in the spherical silicon dioxide and covered by silicon dioxide, sintering of the iron nanometer particles is prevented, and appearance of materials which are difficult to reduce is avoided. The iron-based catalyst is applied to preparation of alpha-olefin, a new process route of alpha-olefin is provided, synthetic gas is used as a raw material, and in the effect of the iron-based catalyst, alpha-olefin is directly synthesized. The iron-based catalyst has excellent performance, and alpha-olefin with a long chain has high selectivity.

The invention discloses a heavy oil hydrotreatment catalyst carrier, a catalyst and a preparation method thereof. The preparation method of the carrier comprises the following steps: mixing pseudo-boehmite powder and an ammonium phosphate aqueous solution, and molding to obtain a carrier precursor; and treating the carrier precursor by using steam-containing gas, further drying and roasting to obtain a catalyst carrier, and further loading a hydrogenation active metal component on the obtained catalyst carrier to obtain the catalyst. According to the method, the strength and the wear resistance of the carrier can be improved, so that the activity and the stability of the catalyst are integrally improved.

The invention relates to a preparation method of a nanometer porous carbon material. The preparation method comprises the following steps: dissolving a template agent in a water solution, and uniformly stirring, thus obtaining a template agent water solution; adding phloroglucin and melamine into the template agent water solution, adding formaldehyde after completely dissolving, then adding a sodium bicarbonate solution, and uniformly stirring, thus forming sol; sealing and putting the sol in a baking oven for carrying out thermal treatment, thus forming gel; cooling to room temperature, thusobtaining organic wet gel; repeatedly washing the organic wet gel in a deionized water solution of sorbitan oleate, and then drying at normal pressure, thus obtaining an organic dry gel block. The nanometer porous carbon material prepared by the preparation method has the characteristics of adjustable density, low cost, high specific surface area and the like, and plays a critical role in the field of electrochemistry.

The invention discloses a residual oil hydrogenation protective agent carrier, a catalyst and a preparation method thereof. The carrier is a modified alumina-based carrier, and the modified alumina-based carrier contains a modification element and a first hydrogenation active metal component; the modified alumina-based carrier comprises main body modified alumina and rod-like modified alumina, themain body modified alumina is alumina with micron-sized pore channels, and at least part of the rod-like modified alumina is distributed on the outer surface of the main body modified alumina and inthe micron-sized pore channels with the pore diameter D of 5-10 [mu] m; the modification element is vanadium, and the first hydrogenation active metal component is molybdenum. The catalyst prepared byadopting the hydrogenation protective agent carrier has the characteristics of good macromolecular diffusion performance, strong impurity capacity, high asphaltene conversion rate and the like, and is particularly suitable for a residual oil hydrotreatment process.

The invention relates to the technical field of nanofibers and provides a porous alumina nanofiber and a preparation method thereof. aluminum hydroxide is used as an aluminum source, an ammonium saltor an amide compound is used as a modifier, an alumina precursor is prepared through hydrothermal crystallization of the activated aluminum hydroxide and the modifier; the porous alumina nanofiber isprepared by calcining the alumina precursor. The preparation method provided herein has simple steps and low cost; a hydrothermal crystallization mother liquor is reusable; no wastewater is discharged; energy is saved, and the environment is protected; the preparation method is green and is suitable for industrial production. The industrial aluminum hydroxide low in price and easy to attain is used as one aluminum source which helps further reduce the production cost as compared to a soluble aluminum salt; the alumina precursor prepared herein has specific surface area up to 505.4 m<2> / g and pore volume up to 2.70 cm<3> / g; after being calcined, the porous alumina nanofiber has specific surface area up to 318.3 m<2> / g and pore volume up to 2.10 cm<3> / g.

The invention discloses a hydrodemetallization catalyst and a preparation method thereof. The hydrodemetallization catalyst comprises a carrier and a hydrogenation active metal component, wherein thecarrier is an aluminum oxide-based carrier and comprises main body aluminum oxide and rod-like aluminum oxide, the main body aluminum oxide is aluminum oxide with micron-sized pore channels, and at least a part of the rod-like aluminum oxide is distributed on the outer surface of the main body aluminum oxide and in the micron-sized pore channels with the pore diameter of 3-10 microns; wherein thelength of the rod-like aluminum oxide is 1-12[mu]m, the diameter of the rod-like aluminum oxide is 80-300nm, and the content of the hydrogenation active metal on the rod-like aluminum oxide on the outer surface of the catalyst is higher than the content of the hydrogenation active metal in the bulk phase of the catalyst. The hydrodemetallization catalyst disclosed by the invention is strong in metal deposition resistance and carbon deposition resistance, good in activity and stability, and suitable for the hydrotreating process of heavy oil.

The invention discloses a preparation method of a hydrodesulfurization catalyst. The method comprises the following steps: (1) sequentially adsorbing an aluminum salt solution and an alkaline solutionby using a physical pore-enlarging agent, and then drying and roasting to obtain a modified physical pore-enlarging agent; (2) kneading and molding the modified physical pore-enlarging agent obtainedin the step (1) and pseudo-boehmite, drying and roasting to obtain an intermediate; (3) immersing the intermediate obtained in the step (2) into an ammonium bicarbonate solution, then carrying out sealed heat treatment, and drying and roasting the material subjected to heat treatment to obtain a modified alumina-based carrier; and (4) impregnating the modified alumina-based carrier obtained in the step (3) with a hydrogenation active metal component impregnation liquid, and carrying out drying and roasting so as to obtain the hydrodesulfurization catalyst. The hydrodesulfurization catalyst prepared by the method has the characteristics of good macromolecular diffusion performance, strong desulfurization capability, high carbon residue removal rate and the like.

The invention relates to a nickel-lanthanum oxide catalyst for methane dry reforming, the active component of the catalyst is metal Ni, the carrier is La2O3, and an obvious Ni-La interface is formed between the active component and the carrier; the weight percentage of the active component Ni is 1.0-5.0%, and the size of Ni nano-particles is about 20 nm; and the weight percentage of the carrier La2O3 is 95.0 to 99.0 percent. Meanwhile, the invention also discloses a preparation method of the catalyst. The catalyst shows very high catalytic stability, so that the problems of high-temperature sintering and carbon deposition of active components are effectively solved.

The invention discloses a preparation method of graphene-doped two-dimensional nitrogen and phosphorus, which belongs to the technical field of graphene preparation. The modification on an inorganic material based on a layered structure can be realized; while high-temperature steam is adopted for physical modification, pores are filled with activated carbon materials; a surfactant is used to perform surface active treatment, air in micropores in the activated carbon material overflows under the extrusion of water to form tiny bubbles; then, huge energy is released by collapsing and exploding in pores of the inorganic material with the layered structure, which has a pore expanding effect on the layered structure inorganic material, the overall porosity and mesoporous fraction are increased,the ion exchange effect of the layered structure inorganic material can be promoted, subsequent nitrogen-phosphorus atoms can be distributed more sufficiently and uniformly, and the performance of graphene-doped two-dimensional nitrogen and phosphorus is remarkably improved.

The invention discloses an alumina carrier, a hydrodemetallization catalyst and a preparation method of the hydrodemetallization catalyst. The alumina carrier comprises main body alumina and rod-likealumina, and at least part of the rod-like alumina is distributed on the outer surface of the main body alumina and in micron-sized pore channels; rod-shaped alumina on the outer surface contains carbon, and rod-shaped alumina in the micron-sized pore channels contains modified elements. The preparation method of the alumina carrier comprises the following steps: dipping a physical pore-enlargingagent in a solution containing the modified elements, then mixing and kneading the physical pore-enlarging agent with pseudo-boehmite for molding, drying and roasting to prepare an alumina carrier intermediate; immersing the alumina carrier intermediate into an ammonium bicarbonate solution, carrying out sealed heat treatment, and drying; and spraying and impregnating the outer surface of the material with a carbon-containing solution, drying and roasting to obtain the alumina carrier. The alumina carrier has large pore size, high specific surface area and high mechanical strength, and is suitable for heavy oil hydrodemetallization catalysts.

The invention belongs to the technical field of desulfurization in petrochemical industry, and in particular relates to a normal temperature desulfurizer and a preparation method thereof. The desulfurizer comprises the following components by weight: 40-60 parts of gamma-alumina; 40-50 parts of nano zinc oxide; 6-12 parts of transition metal oxides; and 0.3-0.8 parts of rare earth metal oxides. The room temperature desulfurizer provided by the present invention can remove organic sulfur and inorganic sulfur in the gas at the same time through the selection and optimization of the desulfurizer composition and dosage, and the breakthrough sulfur capacity and desulfurization accuracy are greatly improved. When the desulfurization accuracy is 10ppb , The maximum breakthrough sulfur capacity of hydrogen sulfide removal can reach 29.31%, the maximum breakthrough sulfur capacity of organic sulfur removal can reach 25.47%, and the maximum sulfur capacity of total sulfur removal can reach 54.78%. At the same time, in the desulfurizer provided by the present invention, copper oxide is selected as the transition metal, and the effect is optimal when the rare earth metal is lanthanum oxide, and unexpected technical effects have been achieved.