45results about How to "Large specific surface area" patented technology

The invention relates to the technical field of microorganism, in particular to a preparation technique of complex fungicide repairing amino acid fermenting wastewater. The preparation technique includes steps of 1) preparing a carrier; 2) preparing complex fungicide liquid; 3) preparing complex algae solution; 4) preparing complex fungicide. The preparation technique is simple, feasible, easy to master, and applicable to industrial popularization and use.

The invention discloses a preparation method of a nitrogen doping pine nut shell based porous carbon material and application. The method is characterized in that carbon precursors prepared from pinenut shells are subjected to low-temperature carbonization treatment; then, obtained materials and nitrogen-containing compounds are roasted and activated by using basic inorganic matters for preparinga finished product. The preparation method comprises the following preparation steps of 1, washing the pine nut shells by water; drying the pine nut shells; grinding the pine nut shells into powder;performing low-temperature carbonization to obtain carbon precursors; 2, mixing the carbon precursors, the nitrogen-containing compounds and the basic inorganic matters; performing stirring, drying and roasting to obtain a nitrogen doping pine nut shell based porous carbon material; 3, performing acid washing, filtering, drying and grinding on the nitrogen doping porous carbon material to obtain the nitrogen doping pine nut shell based porous carbon material with the specific surface area being 1359 to 2524m<2>g<-1> and the pore diameter distribution being 1.60 to 2.40 nm. The being applied toa super capacitor electrode material, the material can realize the specific capacitance value of 278 to 380 Fg<-1> at the current density of 0.5 Ag<-1>.

The invention discloses a biomass porous carbon material as well as a preparation method and application thereof. The carbon material is prepared by taking succulent plants as raw materials through an alkali activation method and has micropore and mesopore distribution at the same time. Collected succulent plant leaves are cleaned, dried and crushed, and then are calcined in a tubular furnace filled with inert gas at a high temperature to obtain a solid carbonization product, then an activator and the obtained carbon material are fully mixed and stand, and secondary carbonization is performed in an inert gas atmosphere to obtain the porous carbon material with rich pore structures. The biomass porous carbon material prepared by the invention has the advantages of ultrahigh specific surface area, stable structure and excellent performance. The problems of low capacity and complex production process of the existing carbon material are effectively solved. In addition, as succulent plants are used as raw materials, the defect of high cost of carbon materials is overcome. The porous carbon material can be used for gas adsorption and electrochemical energy conversion/storage devices, and large-scale preparation and application of the porous carbon material are achieved.

The invention relates to an efficient absorption method for 2-cyanopyridine. The method comprises the following concrete steps: in a process of preparing 2-cyanopyridine by ammoxidation of 2-methylpyridine, cooling and absorbing mixed gas with the temperature of 200-230 DEG C, obtained through primary cooling after ammoxidation reaction by taking high-pressure fine water mist as an absorbent, wherein the particle size of the high-pressure fine water mist is not more than 100 microns (preferably less than 50 microns). According to the method, the mixed gas generated by ammoxidation during production of 2-methylpyridine is quickly cooled and absorbed by the high-pressure fine water mist with the particle size of not more than 100 microns, so that the hydrolysis of 2-cyanopyridine is inhibited and the absorption efficiency is improved.

A process for producing a high surface area iron material, comprising predominantly low crystalline iron oxides, starting with a low surface area iron metal is disclosed. The iron material of the present invention has a surface area of at least about 200 m²/g, and is prepared via a method which comprises reacting a low surface area iron metal with oxygen and an organic acid. The high surface area iron material formed via this method is essentially free of contaminants.

The invention discloses spherical nano-porous hydroxylapatite prepared through shells and a preparation method thereof, and belongs to the technical field of material preparation. According to the hydroxylapatite prepared through the method, the hydroxylapatite is in a spherical shape, the diameter is 4-5 micrometers, the dispersity is good, the specific surface area is 270 cm<2>/g, the average pore diameter is 18 nm, carbonate radicals are contained, the components are similar to those of hydroxylapatite in the bones, and the biocompatibility is good. The preparation method comprises the following steps that the shells are washed, dried and ground, acetic acid with the concentration of 0.1 g/mL is added to fully react with the ground shells, an H3PO4 solution is dropwise added into a prepared calcium acetate solution, trisodium citrate is added, urea is added after reacting under stirring are performed, a prepared solution is stirred to be subjected to a reaction for 5 min in a water bath at the temperature of 80 DEG C-90 DEG C, standing is performed until precipitates occur, and the obtained precipitates are filtered, washed, dried and then collected. According to the method, shell powder does not need to be calcined, the reaction time is short, the pH does not need to be adjusted, operation is easy, the repeatability is good, the raw materials are easy to obtain, and not only is waste utilization achieved, but also energy conservation and emission reduction are facilitated.

The invention discloses an MnOx-FeOx-CuSO4/TiO2 medium-low temperature SCR catalyst and a preparation method thereof. The preparation method comprises the following steps of: (1) mixing hexadecyl trimethyl ammonium bromide, tetrabutyl titanate and anhydrous ethanol, and adjusting the pH value of the mixed solution with glacial acetic acid to prepare a Ti precursor sol; (2) adding the prepared Ti precursor sol into CuSO4.5H2O, continuing to adjust the pH value of the obtained solution with glacial acetic acid, and performing stirring under the protection of nitrogen to obtain a main active substance load; and (3) adding Mn(Ac)2.4H2O, Fe(NO3)3.9H2O and deionized water into the main active substance load sequentially, continuing to stir the obtained mixed liquid, then aging the mixed liquid in a water bath, and performing drying and calcining to obtain the finished catalyst product. The SCR catalyst prepared by using the preparation method has high activity of denitration at medium-low temperatures of 200-350 DEG C, can adapt to requirements of practical industrial application, and has a very broad prospect of industrial application.

The invention discloses a manufacturing method for a textured paint decorated prefab coiled material for a building external wall. The method comprises the following steps that (1) a tough substrate layer is prepared, specifically, powder materials including quartz sand of 80-150 meshes, sub-nanometer ferronickel blast furnace slag ultrafine powder, 52.5R Portland cement and hydroxypropyl methyl cellulose are weighed and added in sequence, stirring is conducted when the powder materials are started to add, and after the hydroxypropyl methyl cellulose is added, stirring is conducted for 4-6 min; stirring is conducted for 3-5 min after emulsion A is added, emulation B and proper amount of water are added, stirring is conducted for 6-8 min, and the tough substrate slurry suitable for spraying and rolling is prepared; (2) the tough substrate slurry obtained in the step (1) is sprayed and rolled on organic macromolecular non-woven fabric and is cured in high-temperature environment with the temperature being 80-90 DEG C, and a foundation coiled material is formed, waterproof primer is sprayed on the foundation coiled material and subjected to hot air drying at 40-50 DEG C, main textured paint is sprayed and is cured and dried in the environment at 70-75 DEG C, and finally finish-coat paint is sprayed and subjected to hot air drying at 40-50 DEG C to obtain the finished coiled material.

The invention discloses a denitrification catalyst loading iron-cerium-copper on activated carbon and prepared with a precipitation method as well as a preparation method and application of the denitrification catalyst. The denitrification catalyst is formed by a carrier and the active component loaded on the carrier, wherein the carrier is the activated carbon, the active component is formed by an iron-cerium-copper oxide, and the mass of the active component is 1.5-40 percent of the mass of the carrier. The prepared denitrification catalyst loading iron-cerium-copper on the activated carbontakes the activated carbon as the carrier, has very large specific surface area, is low in cost of the activated carbon and small in pollution and is environmentally friendly. The active component ismainly iron, so that the production cost is lowered; as an additive, cerium improves the denitrification performance of the catalyst; and copper can improve the SO2 resistance of the catalyst.

The invention discloses a desulfurization and denitrification agent, a preparation method and application thereof. The desulfurization and denitrification agent is a nanometer material and comprises the following components: MgO, SiO2, CaO, Fe2O3, Al2O3, CuO and MnO2. Preferentially, the desulfurization and denitrification agent also comprises a strong oxidant KMnO4. By using the nanometer desulfurization and denitrification agent disclosed by the invention, NOX can be synchronously removed during a flue gas desulfurization process, and the desulfurization and denitrification efficiency is high.

The invention discloses a 2, 2, 4, 4-tetraalkyl-1, 3-cyclobutanedione hydrogenation catalyst and a preparation method thereof, and the catalyst comprises 80%-90% of activated carbon, 1%-10% of ruthenium and 1%-10% of indium. When the catalyst is used for preparing 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanediol from 2, 2, 4, 4-tetramethyl-1, 3-cyclobutanedione, the stability is high, the activity is better, and the preparation process is simple.