35results about "Carbon compounds" patented technology

The method for preparing active carbon from bamboo raw material includes the following steps: (1). mao bamboo and waste produced by making bamboo wares are used as raw material, through cutting and screening, and screening bamboo scraps or screening bamboo scraps and making them form; (2). low temp. pyrogenic distillation carbonization of bamboo raw material in carbonization furnace, its pyrogenic distrillation carbonization temp. is 200-600 deg.C; (3). in the presence of micro oxygen placing the carbonized bamboo raw material into activating furnace and making activation by using superheatedsteam at high-temp., activating temp. is 400-850 deg.c; and (4) breaking or water washing activated active carbon, drying, sorting and sieving to obtain the invented product. Before carbonization thebamboo raw material can be soaked in mixed solution formed from zinc chloride and hydrogen peroxide or mixed solution formed from phosphoric acid and hydrogen peroxide. Its product not only possessesthe advantages of all the wooden active carbons, but also its methylthionine chloride decolouring power can be raised by 20%.

The invention relates to a surface treatment method of boron carbide powder. The surface treatment method comprises the following steps of: an acid treatment process of sufficiently mixing the boron carbide powder, water and acid, wherein the using amount of the acid is configured to enable a pH value of a mixture to be within 0.5-3; a process of aging the mixture at a ruled temperature within aging ruled time; and a process of filtering and washing obtained filter cake or powder with water until a pH (Potential of Hydrogen) value of a filtrate is 3-6.

The invention discloses a preparation method of fullerol. The method comprises the steps that: step 1, an aromatic hydrocarbon solution of fullerene is subjected to a sufficient oxidation treatment in an oxidation reagent, such that a fullerene oxide suspension liquid is obtained; step 2, the fullerene oxide suspension liquid is subjected to centrifugal washing and is dried, such that fullerene oxide powder is obtained; step 3, the fullerene oxide powder is dispersed or dissolved in a solvent; and the material is dried, such that fullerene oxide powder is obtained; step 4, the fullerene oxide powder is hydrolyzed; and an obtained product is dried, such that fullerol powder is obtained; and step 5, the fullerol powder is re-crystallized; and the obtained product is dried, such that pure fullerol is obtained. Fullerol prepared with the method provided by the invention can be produced in batches, and has excellent performances in respects of free radical removing and anti-oxidation.

The invention discloses a method for preparing active carbon from biomass, and active carbon prepared by using the method. According to the method, the active carbon with an ultra-high specific surface area is prepared through baking, breaking, rapid stirring and chelating of an appropriate proportion of an activating agent, high-temperature pyrolysis and activation, acid washing and other steps. Compared to active carbon in the prior art, the active carbon of the invention has the advantages of usage of widely available and cheap raw materials, reutilization of the waste, rich pores and ultra large specific surface area, and has important application value in the fields of electrochemistry and pollutant adsorption. The method is simple in steps and suitable for industrial mass production.

The invention relates to a method for controlling surface potentials of a graphene-based material by treating the graphene-based material via a chemical reagent. The graphene-based material with the different surface potentials can be prepared by controlling the type, the dosage, the reaction time, the reaction temperature and the like of the chemical reagent. The method comprises the following steps: dispersing graphite oxide into a solvent and performing ultrasonic stripping so as to prepare a graphene oxide dispersion liquid; adding an oxidizing agent, a reducing agent or the chemical reagent having specific functional groups (comprising solution thereof); performing water-bath refluxing and controlling the reaction time and the reaction temperature under a condition of magnetic stirring; performing centrifugal washing and drying on a product; and dispersing the product in the certain solvent and regulating a pH value, thereby obtaining the graphene-based material dispersion liquid with the certain surface potentials. The method is simple to operate and low in cost, and is suitable for preparing a large quantity of graphene-based functional materials with different activities and different functions (the different surface potentials).

The invention relates to a microporous and mesoporous carbon xerogel and organic precursors thereof based on a phenol-formaldehyde xerogel. A characteristic parameter common to carbon xerogels is a peak in the mesopore size distribution determined by the BJH method (Barrett-Joyner-Halenda) from nitrogen absorption measurements at 77 K in the range from 3.5 nm to 4 nm. The production process is characterized firstly by the low starting material costs (use of phenol instead of resorcinol) and secondly by very simple and cost-effective processing; convective drying without solvent exchange instead of supercritical drying or freeze drying. The carbon xerogels and their organic phenol-formaldehyde xerogel precursors have densities of corresponding to a porosity of up to 89%, and the xerogels can also have a relevant mesopore volume. The carbon xerogels obtained from the phenol-formaldehyde xerogels are also microporous.

The invention provides a two-section system and method for coproducing coal-base graphite and carbon nano-tubes. The system comprises a graphitization module and a carbon nano-tube generation module,wherein the graphitization module comprises a graphitization reactor, a volatile component outlet is formed in the top wall of the graphitization reactor, and a carrier gas inlet is formed in the bottom wall of the graphitization reactor; the carbon nano-tube generation module comprises a reforming reactor, a waste gas outlet is formed in the top wall of the reforming reactor, and a volatile component inlet and a water vapor inlet are formed in the bottom wall of the reforming reactor; upper and lower sieve plates are arranged in the graphitization reactor and the reforming reactor, respectively, and feeding holes and discharging holes are formed in the side walls of the graphitization reactor and the reforming reactor; and the volatile component outlet and the volatile component inlet arecommunicated through a middle pipeline. The system has the beneficial effects that aiming at the deficiencies that the energy consumption of high-temperature graphitization of coal is high and volatile components in the graphitization process are not effectively utilized in the prior art, a reaction for catalyzing graphitization and a reaction for catalyzing reforming to prepare carbon nano-tubesare effectively combined, so that the gradient utilization of coal resource is realized, and the high value-added product is obtained.

The invention discloses a preparation method of ultramicroporous active carbon balls used for absorbing coalbed methane. The preparation method comprises following steps: 1, glucose is dissolved in deionized water, solution pH value is adjusted to 11 to 13 so as to obtain a component A; 2, the component A is subjected to hydro-thermal thermal-insulation treatment for 4 to 6h at 170 to 200 DEG C, and is cooled to room temperature to obtain a component B; 3, the component B is separated, a solid substance is collected, is washed with distilled water and ethanol repeatedly for 3 to 5 times, is introduced into a drying oven for 10 to 20h of drying at 70 to 90 DEG C so as to obtain a component C; 4, the component C is heated to 700 DEG C in nitrogen atmosphere, and is subjected to roasting for0.5 to 1.5h so as to obtain a component D; and 5, the component D is washed with distilled water and ethanol for 1 to 3 times, and is introduced into a drying oven for 10 to 20h of drying at 70 to 90DEG C so as to obtain the ultramicroporous active carbon balls. The prepared ultramicroporous active carbon balls possess following characteristics: pore diameter distribution is uniform, adsorption separation effect is excellent, the pore diameter is adjustable, and the preparation process is friendly to the environment.

The invention relates to a production method for microwave catalytic pyrolysis of Eupatorium adenophorum, and belongs to the technical field of comprehensive utilization of resources. The method comprises the following steps: placing Eupatorium adenophorum in a FeSO4 solution, impregnating the Eupatorium adenophorum under an ultrasonic condition, and carrying out filtering and drying to obtain impregnated Eupatorium adenophorum; placing the Eupatorium adenophorum in carbon dioxide atmosphere in a microwave oven, and pyrolyzing the Eupatorium adenophorum at 700-900 DEG C for 30-90 min to obtain a gas product and a solid product; rapidly condensing the gas product at -2 DEG C to directly condense a condensable part into a liquid-phase high quality bio-oil, further processing the bio-oil to obtain a bio-oil fuel, and processing a non-condensable part to form a fuel substitute; and cooling the solid product to room temperature in order to obtain magnetic active carbon. The method allows the high-added value products bio-mass carbon, gas and oil to be prepared through the microwave catalytic pyrolysis of a raw material Eupatorium adenophorum by using FeSO4 as a catalyst, and so the comprehensive utilization of the Eupatorium adenophorum is realized.

The invention relates to a nickel-carbon nanotube composite material, the composite material comprises a substrate and straight carbon nanotubes grown on the substrate; the composite material has a flower shape, and nickel elemental particles are filled in the straight carbon nanotubes. In the composite material, the carbon nanotubes have high degree of graphitization and high crystallinity and are uniformly grown on the surface of the substrate along a straight line, and formed spherical flower-like composite material particles have good dispersibility and higher saturation magnetization, andhave greater application value in adsorbing materials, wave-absorbing materials and other aspects.

The invention discloses an activated carbon washing system and a washing process. The activated carbon washing system comprises a dispensing subsystem for accurate premixing of washing liquid, a washing subsystem for repeated rinsing of activated carbon, a water storage and cooling subsystem for acceleration of cooling, a purification subsystem for secondary recycling of washing wastewater, a post-treatment discharge subsystem for deep purification of the tail water produced by washing of the activated carbon, and an intelligent semi-automatic electric appliance control subsystem for controlling of the operation of the entire washing system. The activated carbon washing system of the invention has the advantages of simple operation, high degree of automation, small occupied land area and thorough rinsing, completely solves problems in the recycling, purification and discharging of reagent wastewater, reduces work intensity and improves work efficiency.

The invention relates to a preparation method of a self-supporting porous carbon electrode material, belonging to the technical field of electrode material preparation. The method specifically comprises the following steps: adding acrylamide, N,N'-methylene bisacrylamide, sodium carboxymethyl cellulose, potassium tetraborate and a chemical activator into water to obtain a mixed solution; then adding an initiator, and carrying out a free radical polymerization reaction at 65-75 DEG C to obtain hydrogel; freeze-drying the hydrogel to prepare xerogel; and carbonizing, washing and drying the xerogel to obtain the self-supporting porous carbon electrode material. The self-supporting porous carbon material is prepared from an acrylamide micromolecule raw material through the steps of free radical polymerization, freeze drying, carbonization and the like, the structure and performance of the prepared porous carbon can be conveniently regulated and controlled through reaction conditions, preparation process is simple, convenient and easy to control, and the obtained porous carbon electrode material is large in specific surface area and has excellent capacitance performance.

A preparation method of a biomass derived carbon material comprises the steps: mixing soybean protein isolate powder with alkali and water at room temperature, heating the obtained mixture to 65-95 DEG C, stirring to form a colloidal semi-hydrolysis product, and drying to obtain dry hydrolysis powder; stirring and mixing wood powder with the obtained dry hydrolysis powder and zinc nitrate hexahydrate, heating the obtained mixed powder to 800-1000 DEG C under the protection of inert gas, carrying out heat treatment for 2-5 h, and then cooling to room temperature to obtain a black product; and mixing the obtained black product with hydrochloric acid, stirring, standing, filtering, washing a filter cake to be neutral, and drying to obtain the finished biomass derived carbon material. According to the method, the steps of carbonization, activation, element doping and the like can be simultaneously realized through a one-step high-temperature process, and the method has the characteristicsof simple preparation process and equipment and excellent finished product performance.

The invention discloses a method for preparing coarse granularity chromium carbide powder capable of simplifying the process, saving the energy consumption, improving the rate of qualified products ina milling process and well meeting requirements of preparation of wear-resistant, corrosion-resistant, high-temperature oxidation resistant novel materials in industries such as hard-face materials,flux-cored wires, high temperature alloys and the like. The method comprises the following steps: burdening chromium sesquioxide powder and carbon, and adding an adhesive to be uniformly mixed; molding with a press after uniform mixing; placing the molded material block in a high-temperature vacuum induction heating furnace graphite crucible, vacuumizing, performing power-on heating and raising the temperature, and maintaining the vacuum degree to be within 200-400Pa; carrying out a vacuum carbonation reaction between the chromium sesquioxide powder and carbon to produce chromium carbide, andcontrolling the carbonation reaction temperature to be 1350-1550 DEG C, wherein the carbonation reaction time is 8-15 hours; enabling the vacuum degree to be less than 100Pa, filling the furnace withargon after the carbonation reaction is completed, controlling the pressure in the furnace to be 40-80kPa, and increasing the heating power to melt the chromium carbide sintered body so as to obtain achromium carbide ingot; crushing the chromium carbide ingot into particles with the granularity of less than 10mm by using a mechanical method, milling by an impact crusher, and passing through a 60-mesh sieve, thereby obtaining the coarse granularity chromium carbide powder.

The invention discloses rinsing equipment used for active carbon production. The rinsing equipment comprises a shell, wherein electric telescopic rods I are arranged on the edge of the lower end faceof the shell; a mounting base is arranged at the lower end of each elastic telescopic rod I; an idler wheel is arranged at the lower end of each mounting base; a guide rod and a lead screw parallel toeach other are arranged at the left end and the right end of the interior of the shell respectively; a movable base plate is arranged on the lead screw; a coupling device I is arranged at the lower end of the shell; and a servo motor is arranged at the lower end of the coupling device I. The rinsing equipment is simple in structure and convenient to use, flexible movement and fixation of the device can be realized, special production requirements of users are met, the design is more humanized, the height of the rinsing equipment can be adjusted, materials are convenient for workers to load and take, the work efficiency of the workers is improved, and then the production efficiency of active carbon is guaranteed; and moreover, the positional conversion of active carbon in a rinsing solution can be realized by adopting various manners, and the rinsing is more thorough.

The invention relates to a preparation method of medicinal active carbon. The dried bagasse is used as raw materials, and is crushed; then, the materials are added into a potassium carbonate solution to be soaked; the weight ratio of the bagasse to the potassium carbonate solution is 1:(4 to 7); the soaked bagasse is subjected to centrifugation dewatering; then, air isolation is performed for carbonization treatment; carbides are obtained; the carbides are subjected to acid washing by hydrochloric acid, and are then washed by water to a neutral state; finally, drying and sieving are performed. The medicinal active carbon has the advantages that the decoloring speed is high; the adsorption capability is high; the medical property of the medicine per se is not influenced. The bagasse is used as the raw materials; the resource waste and the environment pollution are avoided; the ecological environment protection is facilitated; in addition, the bagasse per se is a safe and nontoxic reproducible substance material; the product added value is high; good social and economic benefits can be generated.

The invention discloses a fish roe based porous carbon material. Fish roes are pre-carbonized at a low temperature to form a carbon precursor, and the carbon precursor and alkaline inorganic substances are directly mixed to prepare the fish roe based porous carbon material by calcination. A preparation method includes steps: 1) carbon precursor preparation; 2) carbon precursor activation; 3) porous carbon material aftertreatment. In application to an electrode material of supercapacitors, when the current density is 1A g<-1>, and a specific capacitance range is 222-396 F g<-1>. The method is simple in process, convenient to operate and easy to implement, and the prepared fish roe based porous carbon material serving as the electrode material of the supercapacitors is excellent in performance.

The invention discloses a preparation method of active carbon. The method comprises the following steps: (1), material crushing; (2), material forming; (3), material carbonizing; (4), material cooling; (5), carbon block breaking; (6), carbon block activating; (7), acid pickling; (8), washing; and (9), drying. The method capable of converting roots, stems and leaves of plants into active carbon provides a novel approach for treating agricultural and forest residues through a green and environmentally friendly mode, and active carbon products with economic benefit can be further obtained. The content of fixed active carbon in roots and stems of plants in the prior art is generally low, blocky materials, with the structural strength being even superior to that of timber, are obtained while the material accumulation space is greatly reduced through forming squeezing on roots, stems and leaves of plants, further carbon components in raw materials are kept in a concentrated manner, and the method provides a powerful technical support for improving the carbon acquisition ratio during further carbonization.

The invention relates to a carbon dioxide separation technique, which is particular applied to an ion additive for carbon dioxide absorbent of organic amines, wherein, the ionic additive contains 0.01%-5% of Rb[UO2SeO4(OH).H2O] and 0.01%-5% Cu2(CO3)OH2. Compared with organic amines without the ion additive, the oxidation speed of the organic amines with the ionic additive can be reduced by around 50% and the electrochemical corrosion can be decreased by 40%.

The invention discloses a method for hydrothermally assisted production of lignin activated carbon with a high specific surface area. The method comprises the steps of putting lignin and deionized water into a reaction kettle; placing the reaction kettle in a muffle furnace and keeping the temperature for a certain time; putting the hydrothermally assisted mixture into a nickel ark, adding a certain mass of KOH, and slowly stirring; placing the nickel ark containing the stirred mixture in a high-temperature tubular furnace to be activated for a certain time; and cooling, pickling and washing the activated product, and drying in a drying oven until the weight is constant, thereby obtaining the lignin activated carbon with high specific surface area. Compared with lignin pyrolytic carbon (without hydrothermal assistance and KOH), the specific surface area is remarkably increased, and the increase rate reaches 265.82-374.90%; and compared with lignin activated carbon (without hydrothermal assistance) activated by KOH, the specific surface area is also remarkably increased, and the increase rate reaches 48.93-93.34%. The process is simple to operate, low in production cost and remarkable in economic benefit.

The invention discloses a doped graphene hydrogel and a preparation method thereof, and relates to the field of graphene. The preparation method comprises the following steps: 1, dispersing and dissolving: adding graphene into distilled water according to a certain proportion, and stirring and dispersing; 2, oxidation reduction: adding a doping agent into the dispersed graphene, then stirring, wherein the dropwise adding speed of the doping agent is 25-30 mL/min, and the dropwise adding time is 8-12 min; 3, stirring reaction: stirring for a certain time at a certain temperature to preliminarily form preliminary doped graphene hydrogel; 4, filtering to remove water: filtering the obtained preliminary graphene-doped hydrogel so as to obtain the doped graphene hydrogel, wherein in the preparation process of the graphene hydrogel, the the graphene hydrogel which is prepared through continuously adding a silver sulfide quantum dot stock solution for 10 minutes at a speed of 30 mL/min has the best shape, meanwhile, the graphene hydrogel doped with the silver sulfide quantum dots can be used for effectively removing ions in the sewage.

Ion-doped two-dimensional nanomaterials are made by inducing electronic carriers (electrons and holes) in a two-dimensional material using a captured ion layer at the surface of the material. The captured ion layer is stabilized using a capping layer. The induction of electronic carriers works in atomically-thin two-dimensional materials, where it induces high carrier density of at least 10¹⁴ carriers/cm². A variety of novel ion-doped nanomaterials and p-n junction-based nanoelectronic devices are made possible by the method.