382 results about "Carbon product" patented technology

Fuel cells are described and contain a gas diffusion electrode, a gas diffusion counter-electrode, an electrolyte membrane located between the electrode and counter-electrode. The electrode or counter-electrode or both contain at least one modified carbon product. The electrolyte membrane can also or alternatively contain modified carbon products as well. The modified carbon product is a carbon product having attached at least one organic group. Preferably the organic group is a proton conducting group and/or an electron conducting group. The present invention preferably permits the elimination of fluoropolymer binder in the active or catalyst layer and further preferably leads to a thinner active layer and/or a thinner electrolyte membrane. Other uses and advantages are also described.

The invention relates to a method for comprehensively using aluminium to electrolyze a waste cathode carbon block, which belongs to the technical field of environment protection and comprises the following steps: crushing and grinding the waste cathode carbon block; adjusting the concentration and the PH value of ore slurry after the grinding, then using floatation equipment to carry out floatation treatment, and separating electrolyte and carbon which are contained in the waste cathode carbon block; using an aluminium salt solution to soak for extracting the electrolyte contained in a carbon product obtained from the floatation, and further improving the grade of a high-carbon product; mixing the grinding waste water, the floatation waste water and the soaking solution, and adding CaO and CaCl2 to precipitate and recover aluminium and fluothane in the mixture. The method for comprehensively using aluminium to electrolyze a waste cathode carbon block has simple operating condition, low energy consumption, high recovery ratio of valuable substances and good application prospect.

This invention relates to electrode substrates for electrochemical cells, particularly low-temperature fuel cells, and processes for their production. Low-cost carbon fiber paper structures are used as precursor for preparation of an all-carbon product that has a high electric conductivity and porosity and can be processed in a continuous reel-to-reel mode. These paper materials are further impregnated and processed to adjust the final product properties. This all-carbon electrode substrate is not brittle thereby avoiding the main disadvantage of the prior art.

The invention relates to a production process of a high-purity graphite section and a sectorial columnar graphite section prepared by the process. The process comprises the following steps: milling, mixing kneading, rolling, re-milling, compression molding, roasting, dipping, re-roasting and dipping to the selected materials; placing the roasted carbon products in a closed graphite purification furnace; sequentially inletting inert gas, chlorine, Freon and tetrafluoroethane inert gas under corresponding temperature for graphitization purification. The process has the advantages of short roasting and graphitization time, high production efficiency and low energy consumption. The graphite section prepared by the process is characterized by high purity, high density, high intensity, good thermal shock resistance, easy precision finishing and extremely wide application. Moreover, the prepared sectorial columnar graphite section, which is easy to be spliced into cylindrical graphite, can avoid the generation of cracks owing to excessive temperature differentials between the exterior and the core of large-scaled sections, prolongs the service life of the products and meets the needs of the market on large-size and high-standard cylindrical graphite section.

A method for converting a polyhydric alcohol into propylene glycol and butanediols is disclosed. Also disclosed are methods for converting polyhydric alcohols into three-carbon products and four-carbon products. Also disclosed are methods for maximizing conversion of polyhydric alcohols and minimizing formation of reaction products that are difficult to remove from the desired product. In other embodiments, methods are described to optimize use of reactants, including hydrogen, in hydrogenolysis of polyhydric alcohols.

Fuel cells are described and contain a gas diffusion electrode, a gas diffusion counter-electrode, an electrolyte membrane located between the electrode and counter-electrode. The electrode or counter-electrode or both contain at least one modified carbon product. The electrolyte membrane can also or alternatively contain modified carbon products as well. The modified carbon product is a carbon product having attached at least one organic group. Preferably the organic group is a proton conducting group and/or an electron conducting group. The present invention preferably permits the elimination of fluoropolymer binder in the active or catalyst layer and further preferably leads to a thinner active layer and/or a thinner electrolyte membrane. Other uses and advantages are also described.

Proton exchange membranes incorporating modified carbon products. The modified carbon products advantageously enhance the properties of proton exchange membranes, leading to more efficiency within a fuel cell or similar device.

Shaped porous carbon products and processes for preparing these products are provided. The shaped porous carbon products can be used, for example, as catalyst supports and adsorbents. Catalyst compositions including these shaped porous carbon products, processes of preparing the catalyst compositions, and various processes of using the shaped porous carbon products and catalyst compositions are also provided.

The invention discloses a curve screen based on nanometer touch-control membrane technique and a manufacturing method thereof. The curve screen comprises a curve substrate, wherein the curve substrate is an arc-shaped imaging device; the radian of the curve substrate is 0-180 degrees; the curve substrate is adhered to a nanometer touch-control membrane having flexibility; a sensing signal acquisition control integrated circuit is arranged on the nanometer touch-control membrane and is connected to a computer control unit through an interface; and the computer control unit is connected to the curve substrate in a wired or wireless communication manner. In the invention, the touch control technique is realized on the curved surface. The curve screen provided by the invention is suitable fordisplay devices in different sizes. The unit cost is low, the system integration is simple, and the operation is easy, thereby ensuring that the curve screen provided by the invention is a low energy-consumption and low-carbon product.

The invention relates to a method for conducting ultrasonic-assisted acid leaching treatment on aluminum electrolytic waste cathode carbon blocks and belongs to the technical field of aluminum electrolytic solid waste resource recovery. The method comprises the steps that the aluminum electrolytic waste cathode carbon blocks are crushed and added into acid liquor to be subjected to leaching, and powdered carbon and filtrate are obtained through filtration; acid leaching is carried out in an ultrasonic environment; and the pH value of the filtrate is adjusted to be neutral, crystals are separated out through evaporative crystallization, a cryolite and aluminum hydroxide mixture is obtained through filtration, and distilled water is utilized repeatedly. The method is simple in process, operating is convenient, the cyclic utilization rate of materials is high, environmental pollution is little, the reaction speed is increased through the synergistic effect of ultrasonic waves and acid leaching, and the purity of powdered carbon products is improved. The method is suitable for treatment of aluminum electrolytic waste cathode carbon blocks with the carbon content higher than 50%, and the purity of obtained powdered carbon can reach up to 98.47%.

The invention relates to a bimetal powder of copper and nickel and a preparation method thereof. The invention solves the defect of easy oxidation of the simple substance nanometer copper powder and improves the use effect of the ordinary copper nickel composite powder. Referring to the prior art, the invention firstly prepares a nanometer copper powder, the copper powder is stirred and dispersed homogeneously in the water, and suspension liquid of the copper powder is prepared; the suspension liquid of the copper powder is blended with the nickel sulfate solution comprising macromolecule protective agent and special copper coordination agent thiourea so as to cause a replacement reaction between nickel ion and the copper; surfaces of the ultrafine copper particles are partly or all coated with the nickel, thus forming the core-shell copper-nickel bimetal nanometer powder. The bimetal powder can be taken as lubricant, lubricating grease extreme pressure-antiwear additives, additives in powder metallurgy, or as porous materials, antibacterial materials, antifouling coatings, conductive materials, magnetic materials, self-lubricating materials, antifriction materials, diamond tools, and raw materials or additives of electrical carbon products.

The invention offers a kind of craft for separating pillars in the coal powder. It includes three parts of mineral liquid preparation, pillar separate choosing, and product off water. It uses double liquid pillar and material and water-off equipment, and then makes the pillar-box press filter craft, taking off the carbon grains not fired in the coal powder. Put the high carbon coal and water into the mixing bucket, through mixing the mineral liquid is made, transfer it to the entrance of pillar, by the separating choosing, we get pure mineral and the mineral coal powder, through box press filter machine, we get the carbon product and coal powder product. The advantages of the invention are: simple craft, little cost, little energy, and repair little, operating cost little.

An energy efficient, coal-based method and apparatus that are environmentally friendly which produce under pressure metallized/carbon product and molten metal directly from abundant coal or other carbonaceous material, and low cost fines (or ore concentrate) wherein the metal is devoid of gangue material and possesses the inherent advantage of retaining the heat for subsequent processing. This method and apparatus which are modular and highly integrated significantly reduce capital and operating costs; they also provide the capability selective placement of the reductant for the delivery of high levels of thermal energy input which leads to ease of desulflurization and high productivity. The technology herein disclosed is entirely closed and is applicable to various ores including ferrous and non-ferrous.

The invention discloses a regeneration treatment method for waste cathode carbon blocks of an aluminum electrolytic cell and belongs to the technical field of solid waste treatment in the aluminum electrolysis industry. The main treatment process comprises the steps of crushing, screening, toxicity inhibition, batching and pressure-controlled heat treatment. After waste cathode carbon block materials of the aluminum electrolytic cell are crushed and screened, toxic inhibitors of hydrogen peroxide, potassium permanganate, hypochlorite and the like are added, then carbonaceous materials of anthracite, calcined petroleum coke, waste anode carbon blocks, anode scraps and the like are blended to serve as furnace-in raw materials, and the furnace-in raw materials are placed in a resistance furnace to be subjected to heat treatment at the ordinary pressure (1200-1800 DEG C) or the control pressure (1000-1600 DEG C and 0.01-0.5 atm). Fluoride volatilized from flue gas can be used for producingfluoride salt electrolytes after being cooled and crystallized, treated materials do not contain any contaminant, the carbon content is up to 99%, the conductivity is good, the specific surface areais large, the treated materials can be used for producing various carbon products, waste is turned into wealth, and environment-friendly resource application of overhaul of the waste cathode carbon blocks of the aluminum electrolytic cell is achieved.

The invention relates to a personal-based carbon dioxide recording and tracing system platform, which is characterized by comprising a carbon measuring module, wherein the carbon measuring module concretely and successively comprises a carbon discharge module and an emission reduction verification module used for detecting and verifying carbon dioxide discharge amount and emission reduction amount respectively. The invention calculates and obtains carbon dioxide emission reduction data by scanning input carbon dioxide discharge amount of a product, and regains the carbon dioxide discharge amount and emission reduction amount information of a user after the user scans and uploads the used low carbon product relative certificate thereof so as to realize detection quantization of carbon dioxide discharged in daily activities of the user, calculate the carbon emission reduction amount after low carbon lifestyle is changed, and record and store in a personal carbon database for tracing and querying conveniently. The user also can further participate in exchange activities which take the carbon dioxide emission reduction amount as a currency by a carbon exchange module and a carbon appreciation module.

A method for preparing hydrogen and nano carbon through the catalytic pyrolysis of methane at lower temperature belongs to the technical field of petroleum and natural gas chemical production. The method comprises the steps of putting a catalyst in a reactor, heating to 400-700 DEG C jointly, introducing hydrogen or CO into conduct catalyst reduction, and keeping the temperature and the reducing atmosphere; switching the gas to a hydrocarbon gas in heat release in pyrolysis, the volume ratio of the hydrocarbon gas to methane is 1:9 to 9:1; introducing a feed gas, methane, into the reactor at the temperature of 400-700 DEG C, under the absolute pressure of 0.05 to 0.2 MPa, and at the catalyst airspeed of 100-100 liter (hydro carbon)/g (catalyst)/hour; preparing and obtaining hydrogen when the feed gas passes through the bed layer of the catalyst; and depositing carbon on the catalyst. The catalyst is a nano metallic catalyst. The method has the advantages of low operation temperature, prolonged service life of the catalyst, high conversion rate, continuous operations in the forms of various reactors, reduced production cost, and high purity and controllable appearance of carbon products.

Carbon fiber bundles may be dispersed into substantially single mono-filaments in pitch by stirring a mixture of fibers and pitch at a temperature at which the pitch has a viscosity of about 0.1 to about 5 poise. The resulting fiber pitch binder contains about 0.5 to about 10.0 wt. % carbon fibers substantially dispersed as substantially single mono-filaments which are randomly oriented which may then be used directly as a binder for producing carbon bodies, for example, graphite electrodes, pinstock or specialty graphite articles. This unique binder using an economical amount of carbon fibers has the capacity to increase the strength and reduce the coefficients of thermal expansion of the resulting carbon products in more than one direction due to the random orientation of the carbon fibers.

The carbon and mineral components of fly ash are effectively separated by a continuous air agglomeration method, resulting in a substantially carbon-free mineral stream and a highly concentrated carbon product. The method involves mixing the fly ash comprised of carbon and inorganic mineral matter with a liquid hydrocarbon to form a slurry, contacting the slurry with an aqueous solution, dispersing the hydrocarbon slurry into small droplets within the aqueous solution by mechanical mixing and/or aeration, concentrating the inorganic mineral matter in the aqueous solution, agglomerating the carbon and hydrocarbon in the form of droplets, collecting the droplets, separating the hydrocarbon from the concentrated carbon product, and recycling the hydrocarbon.

The present invention provides a porous metal-containing carbon-based material that is stable at high temperatures under aqueous conditions. The porous metal-containing carbon-based materials are particularly useful in catalytic applications. Also provided, are methods for making and using porous shaped metal-carbon products prepared from these materials.

The invention provides a grading and separating method for protecting crystalline graphite flakes, and aims to solve the problem of high loss rate of the crystalline graphite flakes. The method comprises the following steps: (1) performing closed circuit grinding on raw ore with a high-pressure grinding roller; (2) grading and separating a ground product obtained in step (1) after 'primary rougherflotation, primary concentration and primary scavenging' flotation; (3) re-grinding and re-separating a coarse-grain low-carbon product to obtain medium-carbon graphite concentrate and middling, screening the medium-carbon graphite concentrate to obtain medium-carbon positive-mesh concentrate and medium-carbon negative-mesh concentrate I; re-grinding and re-separating a medium-grain high-carbon product to obtain high-carbon positive-mesh concentrate and middling; re-grinding and re-separating a fine-grain medium-carbon product to obtain medium-carbon negative-mesh concentrate I; grading the medium-carbon negative-mesh concentrate to obtain high-carbon negative-mech concentrate and medium-carbon negative mesh concentrate II. By adopting the method, differential separation of graphite is realized, and the added value of the graphite concentrate is increased.

A dynamic carbon and static carbon mutual conversion method includes: planting rank vegetations, and repeatedly cutting and storing to convert 'dynamic carbon' in the atmosphere into 'static carbon' in the biosphere; controlling biomass oxidation quantity to balance the total quantity of 'dynamic carbon' in the atmosphere; intervening soil wind erosion, rock weathering, monsoon circulation and ocean current distribution regularities to restrain 'static carbon' in the biosphere, the hydrosphere and the lithosphere from transferring into the atmosphere; increasing biomass in coastal wetlands, continental shelf shallow areas, rivers and lakes to promote 'static carbon' in the hydrosphere to transfer into the lithosphere; replacing fossil fuels with clean energy to reduce incremental quantityof 'dynamic carbon' in the atmosphere; developing new climate economy to increase bio-carbon products and increase storage of 'static carbon' in the biosphere; clearing 'dynamic carbon' in the atmosphere according to physical and chemical methods so as to regulate the greenhouse effect, eliminate dust haze, slow down global climate change speed and prolong survival time of human on the earth.