53results about How to "Appropriate pore size distribution" patented technology

The invention relates to a folic acid coupled targeted ferriferrous oxide/mesoporous silica/copper sulfide nano-composite particle as well as a preparation method and an application thereof. The nano-composite particle consists of Fe3O4@mSiO2 core-shell structural nanoparticles, wherein the core-shell structural nanoparticles take Fe3O4 nanoparticles as cores and mSiO2 as shells, and copper sulfide nanoparticles and folic acid cover the surfaces of the shells; the folic acid is grated on one part of the mesoporous silica (mSiO2) and the copper sulfide particles are loaded on the other part of the mesoporous silica; and polyethylene glycol is grated on the surface of the copper sulfide nanoparticles. Compared with the prior art, the nano-composite particles disclosed by the invention has a broad application prospect in the aspects of nuclear magnetic resonance imaging, drug loading and photothermal therapy; anti-cancer drugs and photothermal reagents can be transmitted to tumor parts in a targeted mode; the nano-composite particle can reduce toxic and side effects on normal tissues and cells, and meanwhile, the nano-composite particle can effectively kill cells, so that a treatment effect is further improved; and moreover, the nano-composite particle is relatively low in preparation condition demand and cost.

The invention belongs to the technical field of catalysts for hydrodenitrogenation of coal tar. The technical problem to be solved is to provide a hydrodenitrogenation catalyst capable of deeply removing a nitrogen-containing compound from coal tar and provided with high mechanical strength, wear resistance and water resistance, and a preparation method and application thereof. The invention adopts the technical scheme that in the hydrodenitrogenation catalyst capable of removing nitrogen-containing compound from coal tar, active components consist of tungsten trioxide, nickel monoxide and chromium sesquioxide; aids comprise fluorine and phosphorus; and a carrier consists of aluminum oxide, zirconium oxide, a Hbeta molecular sieve, a binder and an extrusion aid. By adopting the hydrodenitrogenation catalyst capable of deeply removing the nitrogen-containing compound from the coal tar, the oil nitrogen content of the hydrogenation product can be reduced to be below 50 micrograms/gram; and the hydrodenitrogenation property is high, so that the oil sulfur content of the hydrogenation product can be reduced to be below 40 micrograms/gram.

The invention discloses a preparation method and application of a nitrogen-doped peel based porous carbon material. According to the method, waste peel is used as biomass raw materials; through an ultrasound method, the waste peel and a nitrogen source are pretreated; at low-temperature, the materials are pre-carbonized into nitrogen-doped peel based carbon; then, potassium bicarbonate is used asan activating agent for activation at high temperature; finally, through treatments of acid washing, water washing, drying and the like, the preparation of a nitrogen-doped peel based porous carbon super capacitor electrode material with high specific surface area, good pore diameter distribution and certain nitrogen content is realized. The prepared super capacitor material has excellent electrochemical performance which is shown in aspects of high specific capacitance, high energy density, good circulation stability and the like. In addition, the method does not relate to the use of strong basic or strong acidic or toxic activating agents; the preparation method is low in cost and achieves the environment-friendly effects.

The invention relates to a three-dimensionally ordered macroporous-mesoporous graphene, a preparation method and application thereof. The preparation method includes the steps of: (1) immersing orderly stacked organic polymer template balls into a precursor solution of ceramics and conducting heat treatment after separation and drying to prepare an organic polymer template ball/ceramic composite; (2) removing the organic polymer template balls in the obtained organic polymer template ball/ceramic composite to prepare three-dimensional porous ceramics; (3) growing graphene on the prepared three-dimensional porous ceramic substrate by using chemical vapor deposition to prepare a three-dimensional ceramic composite with graphene grown thereon; and (4) adding the three-dimensional ceramic composite with graphene grown thereon into an etching solution, removing the ceramic template and conducting drying to obtain the three-dimensional ordered macroporous-mesoporous graphene. The invention has the advantages of simple process, low cost, strong controllability, and easy realization of large-scale production.

The catalyst consists of nickel oxide 5.0-18.0 wt%, tungsten carbide 1.0-11.0 wt%, molybdenum oxide 0.1-8.0 wt%, titania 1.5-19.0 wt% and alumina 44.0-92.4 wt%. The preparation process includes four steps of treatment of alumina, introducing titanium, soaking of tungsten, and introducing active nickel and molybdenum components. The catalyst has the features of high activity of hydrogenating and saturating oil synthesized via Fischer-Tropsch process, and is especially suitable for hydrogenating and saturating oil with high olefin content and certain amount of oxide.

The invention relates to a hydrofining method of low-grade gasoline/diesel oil. A catalyst uses Si-modified alumina and ETS-10 titanium silicalite molecular sieve with grain size less than 2 Mum as carriers, and Fe, Co, Ni, and Mo and/or W as active components. The Si-modified alumina accounts for 0.5-20 wt% (calculated based on SiO2) of the modified alumina; and the ETS-10 titanium silicalite molecular sieve is sodium/potassium type, the molar ratio of TiO2 to SiO2 is 0.1-0.5, and the total content, by weight, of Na2O and K2O is less than 0.2 wt%. For low-grade gasoline, the invention can decrease sulfur content to below 50 Mug/g, nitrogen content to below 50 Mug/g, and olefin content to below 30 vol%, and the product octane number loss is smaller than 3 units; and for high-sulfur diesel oil, the invention can decrease sulfur content to below 50 Mug/g and nitrogen content to below 20 Mug/g, and the diesel oil yield is higher than 99.8 wt%.

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.

The invention relates to utilization processes for coking by-products, i.e., coke powder and quenched coke powder, especially a method for preparing high-specific-surface-area activated carbon from blend coal of coke powder and/or quenched coke powder. The method comprises the following steps: (a) batching: compounding coke powder and/or quenched coke powder, other carbon-containing materials andan activator; (b) crushing: putting a mixture obtained in the step a) in a crusher for crushing to a powder form, wherein the desired particle size of the powder allows the powder to pass through 70%or more of mesh holes in a 120-mesh sieve; (c) carbonization and activation: subjecting a material obtained in the previous step to carbonization at 500 to 650 DEG C for 1 to 3 h, and then to activation at 750 to 950 DEG C for 0.5 to 4 h; and (d) post-treatment: subjecting the activated material to pickling and/or washing to remove ash and carrying out drying so as to obtain an active carbon product, wherein a weight ratio of the total weight of the coke powder and/or quenched coke powder and the other carbon-containing materials to the activator is 1: 1 to 6: 1, and a weight ratio of the cokepowder and/or quenched coke powder to the other carbon-containing materials is 1: 1 to 6: 1.

The invention relates to a folate-conjugated-and-targeted nanocomposite particle, and a preparation method and application thereof. The nanocomposite particle uses polystyrene as a core and chitosan as a shell; the external surface of the shell is coated with Au nanoparticles and Fe3O4 nanoparticles, grafted with a targeting reagent folate and loaded with a photo-thermal reagent indocyanine green; and the nanocomposite particle is used as an infrared photo-thermal reagent, a drug carrier, a CT imaging contrast agent, a magnetic resonance imaging contrast agent or a fluorescence imaging contrast agent. Compared with the prior art, the invention has the advantage that the folate-conjugated-and-targeted nanocomposite particle prepared in the invention has good application prospects in CT imaging, magnetic resonance imaging, fluorescence imaging and photo-thermal treatment, can realize targeted delivery of the photo-thermal reagent to a tumor site, effectively kills cancer cells while reducing toxic and side effect on normal tissue and cells, further improves treatment effect and has great potential in promotion of accurate diagnosis and improvement of photo-thermal treatment (PTT) effect on cancers.

The invention belongs to the field of battery electrode materials, and relates to a method for preparing heteroatom co-doped porous carbon materials based on a direct ionic liquid carbonization method. The heteroatom co-doped porous carbon materials prepared by the direct ionic liquid carbonization method have proper pore size distribution and high specific surface area, and show high specific capacity and excellent circulating stability when serving as super-capacitor and lithium secondary battery electrode materials. The synthesis process of the heteroatom co-doped porous carbon materials synthesized by the direct ionic liquid carbonization method is simple, and other heteroatom sources are omitted. The heteroatom co-doped porous carbon materials synthesized by ionic liquid serving as a green solvent is green, environmentally friendly and high in practical level, and the problems of toxicity and complexity of a current preparation process of heteroatom doped electrode materials are solved.

The catalyst consists of nickel oxide 5.0-20.0 wt%, tungsten oxide 0.1-15.0 wt%, titania 1.0-20.0 wt% and alumina 45.5-93.9 wt%. The preparation process includes the treatment of alumina, the introduction of titania, and impregnating active tungsten oxide and nickel oxide components. The present invention has the advantages of high hydrogenation activity for heavy hydrocarbon, and is especially suitable for hydrogenating saturation wax with high olefin content.

The invention discloses a preparation method of iron-modified carbon microsphere/carbon nanosheet composite porous carbon based on hydrothermal carbonization of moso bamboos. The preparation method comprises the following steps: firstly, crushing biomass raw material moso bamboos into powder, and carrying out screening and drying; secondly, uniformly mixing the crushed moso bamboo raw material, ferric sulfate and ultrapure water, carrying out hydrothermal treatment, naturally cooling to room temperature after the reaction is finished, carrying out suction filtration, washing with absolute ethyl alcohol and ultrapure water to remove impurities, and drying to obtain the iron-modified carbon microsphere/carbon nanosheet composite hydrothermal carbon; and mixing the composite hydrothermal carbon with an activating agent, fully grinding the mixture in a mortar, putting the powder into a tubular furnace, performing high-temperature activation in an inert gas atmosphere, naturally cooling toroom temperature, and performing acid washing, water washing and drying on the obtained material to obtain the iron-modified carbon microsphere/carbon nanosheet composite porous carbon for the supercapacitor. The iron-modified carbon microsphere/carbon nanosheet composite porous carbon prepared by the method has unique morphology, and has a wide application prospect in the fields of porous materials and supercapacitors.

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 relates to a dual-pore composite alumina material, consisting of the following components in percentage by weight: 0.5-60% of small-hole alumina, 10-80% of large-hole alumina and 0.5-30% of a small-grain titanium silicon molecular sieve, wherein the titanium silicon molecular sieve is ETS-10 and is subjected to hydrothermal treatment or alkali treatment modification, the grain size of the molecular sieve is less than 0.5 micron, the specific area of the material is 200m<2>/g-400m<2>/g, the pore volume is 0.30ml/g-0.60ml/g, the distribution of the pores of which the pore sizes are 3-6nm accounts for 10-40% of the total pore volume, and the distribution of the pores of which the pore sizes are 8-20nm accounts for 60-90% of the total pore volume. The dual-pore composite alumina material is used for preparing an adsorbent and a catalyst carrier.

The invention relates to a method for preparing a silicon-aluminium denitrfying agent. The method for preparing the silicon-aluminium denitrfying agent needs to respectively prepare a silica sol and an aluminium sol, then mix the two sols, regulate a pH value of the mixed sol, carry out ageing on the sol the pH value of which is regulated and finally carry out decompression drying and roasting onan aged gel product. The denitrfying agent prepared by the method has more suitable acid center and has stronger selectivity for basic nitrogen compounds. Moreover, the denitrfying agent prepared by using the method for preparing the silicon-aluminium denitrfying agent has 99.9 percent of removal rate for trace amount of nitrides and a great amount of nitrides. The more important point is that when the denitrfying agent realizes the high denitrification rate, the nitrogen-absorption capacity of the denitrfying agent can also reach 2.1 percent.

The invention belongs to the technical field of Fischer-Tropsch synthesis catalysts, and especially relates to a silicon carbide/silicon nitride carrier, a preparation method thereof, a Fischer-Tropsch synthesis catalyst, and a preparation method and an application of the catalyst. 100 wt% of the silicon carbide/silicon nitride carrier comprises 55-72 wt% of silicon nitride, 25-40 wt% of silicon carbide and 1-12 wt% of alumina; and the Fischer-Tropsch synthesis catalyst includes 20-60 wt% of an active component, 0-20 wt% of a cocatalyst and 30-50 wt% of the silicon carbide/silicon nitride carrier. The silicon carbide/silicon nitride carrier is selected to make the Fischer-Tropsch synthesis catalyst have the advantages of good high temperature stability, good arbrasion resistance and high Fischer-Tropsch synthesis activity.

The invention relates to a preparation method of a honeycomb porous carbon material. Biomass is used as a raw material, the raw material is instantaneously expanded and converted into an expanded three-dimensional reticular porous substance due to rapid evaporation of moisture in the raw material in the high-temperature expansion process, and then the expanded three-dimensional reticular porous substance is subjected to high-temperature carbonization to obtain the porous carbon material. The biomass is expanded by utilizing the high-temperature expansion process to achieve the purpose of opening holes and avoid the subsequent activation step of the porous carbon material in the preparation process. The method is economical and environmentally friendly; the obtained honeycomb porous carbonmaterial has a large specific surface area, rich pore structures and moderate pore size distribution; and the prepared honeycomb porous carbon material has a good application prospect as an electrodematerial for a double-electric layer capacitor.

The invention relates to a distillate oil hydrofining catalyst carrier and a preparation method thereof and mainly solves the problems that traditional hydrofining catalysts have non-centralized pore diameter distribution and poorer coking resistance and stability. The technical scheme is as follows: hydrofining catalyst carrier is prepared from, in percentage by weight, 68%-69.5% of at least one of aluminum oxide, silicon oxide and amorphous silicon-aluminum, 10%-20% of small-pore aluminum oxide, 0.5%-2% of P, 1%-8% of Zr and 0.5%-2% of Mg, so that the problems are better solved. According to the carrier preparation method, metal is added in the carrier preparation process, and the carrier has the characteristics of high strength, medium acidity and centralized pore diameter distribution and can be applied to the distillation oil refining field.

The invention discloses a preparation method of a precious metal-non-precious metal mixed catalyst. The method comprises the following operating steps: mixing the prepared active Al2O3 and a chloroauric acid, and reacting to prepare Au-Al2O3; and by taking vanadium dioxychloride, titanyl sulfate and strontium nitrate as raw materials, preparing V0.5Ti0.5O2, adding the Au-Al2O3 and the V0.5Ti0.5O2into chloroplatinic acid, and reacting, thereby obtaining the Au-Pt/VO2-TiO2-Al2O3. According to the Au-Pt/VO2-TiO2-Al2O3 precious metal-non-precious metal mixed catalyst prepared by the method disclosed by the invention, the specific surface area and pore volume are greater than those of the conventional single oxide support catalyst, the mixed catalyst is high in catalytic activity and stable inperformance, and the preparation process is easy to control.