58results about How to "Increased oxygen-containing functional groups" patented technology

The invention discloses a method for preparing para aramid paper from para aramid fibrid. The method concretely comprises the steps of carrying out surface treatment, defibering and dispersion on para aramid chopped fibers; carrying out ultrasonic treatment and pulping treatment on the para aramid fibrid; mixing the treated para aramid chopped fibers and the treated para aramid fibrid; adding anionic polyacrylamide into the mixed fibers to obtain aramid fiber pulp; shaping the aramid fiber pulp on an inclined wire paper machine; dehydrating, squeezing and drying; carrying out pre-hot-pressing on the dried aramid base paper, and then carrying out hot pressing by a hot press to obtain the para aramid paper. After the method for preparing the para aramid paper from the para aramid fibrid is adopted, the tensile strength, the tearing strength, the breaking strength, the wear resistance and the dielectricity of the para aramid paper are remarkably improved, and the para aramid paper can be taken as a structural material, an insulating material or an electronic material and is relatively widely applied to the fields of transportation, electronics and electric power, aerospace and the like.

The invention discloses a method for harmlessly preparing fertilizer through carcasses. The method comprises the steps that carcass fragments are firstly subjected to heat treatment conversion in an acid environment, the reaction environment is controlled to enable animal fat to be converted into fatty acid, and animal skin, fur and meat are converted into amino acid and humic acid, and animal bones are converted into water-soluble calcium salt and phosphate; the fatty acid is separated, and alkali is added to left amino acid and humic acid mixed liquid for neutralization. Special equipment of the method comprises a carcass crusher, an acidizing reaction kettle, a fatty acid separator and a neutralization reaction kettle which are connected in sequence. The method has the advantages of free of pollution, fast, thorough, efficient, high in quality and the like.

The invention belongs to the field of waste recycling. The invention provides a preparation method of a phosphorous removal adsorbent. The preparation method comprises the following steps: (1) puttingred mud in an acid solution for backflow so as to obtain red mud after acid activation; (2) soaking the red mud after acid activation into a surface active agent, oxidant or sodium carbonate solution, and carrying out modified treatment to obtain modified red mud; (3) mixing the modified red mud with a rare earth solution, adjusting pH value to be 8 to 10, and loading rare earth ions to obtain red mud loaded with rare earth; and (4) carrying out mixing granulation on the red mud loaded with rare earth, a pore forming material and a binder, and carrying out calcinations to obtain the phosphorous removal adsorbent. The removal rate of the phosphorous removal adsorbent prepared in the invention is more than 95% and can reach 100% at most, the adsorption capacity can reach more than 240 mg/g,phosphorous-containing waste water with the concentration of below 30 mg/L is treated, and the concentration of phosphorous can reach the first grade emission standard of pollution discharge standardin a municipal sewage treatment plant within one hour.

The invention discloses a porous carbon nanofiber electrode used for a redox flow battery, and a preparation method of the porous carbon nanofiber electrode. The electrode is 20-500[mu]m in thickness and formed by porous carbon nanofibers with diameter of 50-500nm; the porous carbon nanofiber electrode is prepared by the steps of taking a high-molecular polymer as a precursor, preparing into nanofibers through electrostatic spinning, and then performing high temperature carbonization and next, carrying out high-temperature activation through CO<2> or vapor. The prepared porous carbon nanofiber electrode, with obviously enlarged specific surface area and improved oxygen-containing functional group, has high electrocatalytic activity and electrochemical reversibility when the porous carbon nanofiber electrode is used for the redox flow battery; the redox flow battery has the advantages of simple preparation method, easily available raw material, low cost and the like; the electrode material is applicable to the redox flow battery; due to the ultra-thin electrode thickness, space between electrodes of the battery can be reduced, and internal resistance of the battery can be lowered; and in addition, charge transfer resistance can be lowered, the voltage efficiency and energy efficiency of the all-vanadium redox flow battery are improved, and the weight and the volume of the battery are reduced.

The invention discloses application of a ruthenium palladium/carbon catalyst. A catalyst carrier is a carbon material; active components are Ru and Pd nano particles; the loading capacity of Ru is 0.5-8.0%; the loading capacity of Pd is 0.1-2.0%; the dispersity of ruthenium palladium can be up to 30-80%. The carrier is oxidized and pretreated by acid-base, so that an oxygen-containing functional group on the surface can be increased, the property of the ruthenium palladium at the surface of the carbon material is improved, the dispersity of the ruthenium palladium is improved, and the active components are firmly adsorbed on the foundational group, so that the catalyst displays high activity in the reaction process; the prepared catalyst is applied to hydrogenation preparation of cyclohexanedimethanol (DMCD) employing dimethyl terephthalate (DMT). The activity of the catalyst after being nested for 20 times is not reduced in a 5000ml of high-pressure kettle; the DMT transformation rate is 99.3-100%; the selectivity of the DMCD is 95.5-96.4%; the DMCD purity is greater than 99.5% by simple distillation and purification. Therefore, the ruthenium palladium/carbon catalyst is mild in technological condition, simple in equipment, free of three wastes emission, low in investment, low in energy consumption, and easy in achieving industrialization.

The invention discloses a preparation method of a bio-based composite adsorption material for sewage treatment. According to the method, deionized water, 1-(3-dimethylaminopropyl)-3-ethyldimethylaminopropylcarbodiimide and N-hydroxysuccinimide are added into citric acid modified beta-cyclodextrin, the mixture is stirred and activated and then added into a chitosan solution, then calcium alginate crosslinked attapulgite-zolite microspheres and modified activated carbon are added, the mixture is quickly stirred and poured into a mold, standing is performed overnight, soaking is performed repeatedly with deionized water after gelation, freezing is performed at low temperature, and then freeze-drying is performed to obtain the bio-based composite adsorption material. The attapulgite is organically modified, wherein organic modification is performed by using a surfactant cetyl trimethyl ammonium bromide, the surfactant used for the organic modification is grafted onto the surface of the attapulgite to improve the hydrophobicity of the attapulgite; the organically modified attapulgite has a good effect on removing heavy metal ions in sewage.

The invention belongs to the field of active carbon preparation, and particularly relates to modified composite biochar, a preparation method and applications thereof. The technical problem to be solved by the invention is to provide modified composite biochar, a preparation method and applications thereof. The preparation method comprises: A, carbonizing straws, washing off ash, drying, and crushing to obtain straw biochar; B, mixing the straw biochar, an alkali liquor, carrying out chemical modification, separation, washing the solid, and drying to obtain modified straw biochar; and C, carrying out compounding treatment: mixing the modified straw biochar, polyethylene glycol and water, adding MIEX, stirring, carrying out ultrasonic treatment, adding ascorbic acid or hydroxylamine, continuously stirring, adding a hydrogen peroxide solution, continuously stirring, separating, washing the solid, and drying to obtain the modified composite biochar. According to the method disclosed by the invention, the agricultural and forestry waste straw can be utilized to prepare the modified composite biochar with good adsorption performance.

The invention discloses a preparation method of a zinc oxide nanowire/carbon clothfriction material. The preparation method comprises the steps of firstly soaking carbon cloth cleaned by acetone in hydrogen peroxide, then carrying out crystal seed layerimpregnation on the processed carbon cloth, then adjusting pH of a growth solution to range from 8 to 10, putting the carbon cloth in a hydrothermal reaction liner for hydrothermal growth, and finally successfully growing a zinc oxide nanowire on the carbon cloth; impregnating prepared the zinc oxide nanowire/carbon cloth multi-scale enhanceosome in a resin solution, taking out for naturally drying, and hot pressing through a vulcanizing machine to obtain the friction material. According to the preparation method of the zinc oxide nanowire/carbon clothfriction material provided by the invention, the carbon cloth is processed, so that surface oxygenic functional groups are increased; a crystal seed layer is impregnated, so that the zinc oxide nanowire grows uniformly in a certain hydrothermal environment. The zinc oxide is significant in activity, moderate in hardness, and suitable for building the multi-scale enhanceosome of the friction material so as to improve a frictional wear performance of the friction material.

The invention provides a production method of pigment carbon black applied to coating. A production technology of carbon black through an oil-gas furnace method specifically comprises the following steps: after filtering air, compressing the air through a Roots blower until the pressure is 0.16 to 0.19Mpa; heating to 700 to 750 DEG C through a high-temperature air pre-heater at 800 DEG C, and thenconveying the air into a combustion chamber; axially conveying natural gas with the flow of 400Nm<3>/h and the pressure of 75kpa into the combustion chamber to be mixed with hot air with the flow of5500Nm<3>/h; then sufficiently combusting and controlling the temperature of the combustion chamber to be 1850 to 1950 DEG C; enabling hot flue gas obtained by combustion to flow through a throat section of a reaction furnace at a high speed; spraying raw oil which is mixed with 20kg/h of an additive and has the flow of 1650kg/h into high-temperature flue gas from the throat section and carrying out cracking and polymerization reaction under the pressure of 65Kpa to generate the carbon black; finally, after sieving through a sieving machine with the size of 35 to 80 meshes, conveying a productinto a finished-product storage tank; and packaging to obtain the pigment carbon black. In a continuous production process, the quality of the carbon black is stable; and technical means including the raw oil, the high-temperature flue gas, temperature, pressure, ozone introduction and the like is combined to improve the quality of the pigment carbon black for the coating.

The invention discloses a method for preparing a coke-powder-based carbon adsorbing material by using waste coke powder. The method comprises the following steps of: (1) crashing a waste coke powder raw material and screening the crashed waste coke powder raw material by using a screen of 100 meshes; mixing the coke powder and concentrated nitric acid in a mass ratio of 1:1; stirring the mixture uniformly; and standing for 12 hours in an airtight way to obtain a preoxidation product; (2) mixing the preoxidation product and an active agent of ZnCl2 in a mass ratio of 1/2-1/6; stirring the mixture with an appropriate amount of water uniformly; moving the mixture into a muffle furnace, heating to the temperature of about 350 DEG C at a heating speed of 2 to 10 DEG C per minute; keeping a constant temperature for 1 hour; continuing heating to the temperature of between 650 and 900 DEG C under the protection of nitrogen; activating for 1 to 3 hours; and cooling to the room temperature to obtain a rough coke-powder-based carbon adsorbing material; and (3) washing the coke-powder-based carbon adsorbing material with hot deionized water and drying to obtain a refined coke-powder-based carbon adsorbing material.

The invention discloses a preparation method of a chopped glass fiber silicon dioxide aerogel composite material and the obtained silicon dioxide aerogel composite material. The method comprises the following steps: mixing a silicon source, a solvent I, an acid catalyst, a chemical drying control additive, a basic catalyst, a solvent II and chopped glass fibers, preserving heat to form composite wet gel, putting the prepared composite wet gel into a reaction kettle, adding an aging solution for aging, and then sealing and preserving heat; adding an exchange solvent for at least two times, and keeping the temperature to enable the wet gel to form aerogel; adding a surface modifier and preserving heat for surface modification; adding an exchange solvent and preserving heat; and drying at normal pressure to obtain the silicon dioxide aerogel composite material. In the preparation process, the consumed solvent is less, the preparation speed is high, and the prepared silicon dioxide aerogel composite material is good in heat insulation property, small in density, high in hydrophobicity and high in mechanical strength.

The invention discloses a preparation method of a high-performance PP fiber. According to the method, hydroxylation and carboxylation are carried out on graphene oxide, oxygen-containing functional groups on the surface of the graphene oxide are increased, as many coupling agents KH570 as possible are chelated on the periphery of the graphene oxide, alkylation of graphene oxide is carried out, a special tangle with polypropylene is formed, melt spinning is carried out under the temperature of 250 DEG C-320 DEG C, and the high-performance PP fiber is obtained.

The invention discloses a removal method for dissolved oxygen in recycled water. The removal method comprises the following steps: enabling the recycled water with dissolved carbohydrazide to pass through a reactor filled with a combined modified activated carbon fiber catalyst; catalyzing carbohydrazide reduction at the low temperature of 40 to 50 DEG C to remove the dissolved oxygen in the recycled water, wherein the combined modified activated carbon fiber catalyst is a catalyst obtained by carrying out high-pressure hydrothermal modification treatment on activated carbon fibers, immersingand loading an active metal salt precursor and roasting. According to the removal method disclosed by the invention, the reaction temperature of the dissolved oxygen in the carbohydrazide and the recycled water is effectively reduced, and the removal effect of the dissolved oxygen in the recycled water is improved; the removal method is especially suitable for removing the dissolved oxygen in output water of three-grade treatment of a sewage treatment plant.

The invention provides a preparation method of a catalyst for preparing dichlorosilane. The preparation method comprises the following steps of: step one, soaking active carbon in an aqueous solution of citric acid, taking out and drying the active carbon after the soaking is completed; step two, soaking the active carbon through soaking in an aqueous solution of cobalt salt, taking out and drying the active carbon after the soaking is completed, and then performing baking; and step three, performing a reduction reaction on the active carbon through baking so as to obtain the catalyst. The invention further provides the catalyst prepared and obtained through the preparation method and a preparation method of dichlorosilane adopting the catalyst. According to the preparation methods disclosed by the invention, the catalytic activity of the catalyst can be effectively improved, so that the catalytic efficiency of the catalyst is high; and the dichlorosilane is prepared by adopting the catalyst, so that the yield of the dichlorosilane can achieve more than 12%.

The invention belongs to the technical field of electrochemical catalysis and particularly relates to a preparation method of electrode materials and a wastewater treatment method. The preparation method includes: soaking graphite felt in dilute acid and dilute alkaline sequentially to remove active ingredients on the surface of the graphite felt to obtain the pretreated graphite felt; placing thepretreated graphite felt in a saturated solution of anthraquinone for soaking to obtain a first modified graphite felt; placing the first modified graphite felt in a ferric trichloride solution and slowly dripping a NaBH4 solution to the same to react completely to make the surface of the first modified graphite felt loaded with iron oxide, wherein the NaBH4 solution is 0.45mL/s-0.55mL/s in dripping speed. The electrode materials serve as cathodes used for electrolyzing organic matter in oxidation water, the addition of iron ions to the solution can be avoided in the actual electrical fentontreatment of wastewater, increasing of process complexity is avoided, and increasing of process cost by adjusting the pH value is avoided.

The invention provides a compound enzyme for preparing pulp. The compound enzyme comprises an enzyme carrier and a bio-enzyme, the enzyme carrier is graphene oxide, the bio-enzyme is one or more of cellulase, hemicellulase, ligninase and pectinase, and the bio-enzyme is fixed to the enzyme carrier in an adhering mode. By adopting a method, the bio-enzyme can be effectively fixed to the graphene oxide carrier, the high-proportion surface area and good biocompatibility of the graphene oxide are fully utilized, functional groups rich on the surface of the graphene oxide also have the acidic chemical property, and the action of neutralizing alkaline ions in a solution can be achieved, so that the pH value of the local part around the graphene oxide is decreased, thus the bio-enzyme adhering to the surface of the graphene oxide exerts activity advantageously, the bio-enzyme is fixed by the graphene oxide, most of the bio-enzyme remains in a liquid environment so as to be secondarily utilized, the utilization efficiency of the bio-enzyme is improved, and production waste is reduced.

The invention discloses a bismuth vanadate@silver phosphate/graphene oxide composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method comprises the following steps of: growing needle-like silver phosphate on the surface of bismuth vanadate by adopting an in-situ precipitation method to obtain bismuth vanadate@silver phosphate with a heterojunction structure; and coating the bismuth vanadate@silver phosphate with a heterojunction structure by using graphene oxide to obtain the bismuth vanadate@silver phosphate/graphene oxide composite photocatalyst. In the prepared bismuth vanadate@silver phosphate/graphene oxide composite photocatalyst, needle-like silver phosphate grows on the surface of bismuth vanadate in situ to form a heterojunction structure, and the surface of the bismuth vanadate is coated with graphene oxide nanosheets. The bismuth vanadate@silver phosphate/graphene oxide composite photocatalyst can be applied to treatment of water containing organic pollutants, the organic pollutants are subjected to photocatalytic degradation under visible light irradiation, and good stability and excellent photocatalytic activity are kept.

The invention relates to a remediating chemical for treating heavy-metal polluted soil and a preparing method and application thereof. The remediating chemical is prepared from, by weight, 10-50 partsof a thio-guanidyl formate-modified biochar compound stabilizer, 10-40 parts of soluble phosphate and 10-30 parts of sepiolite powder, wherein the thio-guanidyl formate-modified biochar compound stabilizer is prepared by carrying out a cross-linking reaction between a hexa-thio-guanidyl formate solution and modified biochar. The remediating chemical has a great stabilizing effect on various heavymetals in the soil. Besides, the invention provides the preparing method of the remediating chemical and the application of the remediating chemical in remediating the soil.

The invention relates to a catalyst for catalytic oxidation elimination of formaldehyde and a preparation method thereof. The catalyst takes activated carbon as a carrier and platinum as a main activecenter, and the activated carbon is pretreated through Na2CO3 and hydrogen roasting, so that the adsorption performance of the catalyst to the formaldehyde is improved, and the formaldehyde is enriched in activated carbon pores; and by adding of a dispersing agent, a reducing agent and an accelerant, the high dispersion of low-loading platinum on the catalyst is realized, platinum nano-particleswith extremely small size are obtained, and more catalytic activity sites are exposed, so that the catalytic activity is greatly improved, and the catalyst can be used for continuous catalytic oxidation of the formaldehyde enriched in the catalyst into carbon dioxide and water under the condition of room temperature, and has good practical application prospect.

The invention discloses a high-dispersity activated carbon supported metal catalyst and a preparation method thereof, and belongs to the technical field of inorganic chemical synthesis. The preparation method comprises the following steps: firstly, pickling activated carbon, and drying to obtain purified and modified activated carbon; and impregnating the purified and modified activated carbon with a metal salt solution, taking out and drying to obtain the high-dispersion activated carbon supported metal catalyst. The loading capacity of metal particles on the activated carbon in the catalyst is 0.05-0.5 wt%, the particle size of the obtained activated carbon metal-loaded catalyst is 1-3nm, and the activated carbon metal-loaded catalyst is uniform in distribution and good in dispersion. Activated carbon is purified and modified through acid pickling before loading, impurities are removed, oxygen-containing functional groups are increased, and dispersion anchoring of metal species is facilitated. The activated carbon supported metal catalyst prepared by adopting an equivalent-volume impregnation method has the advantages of high dispersity and uniform size, and can show good stability and relatively high catalytic activity in a catalytic reaction.