20 results about "Coal Tar Pitches" patented technology

This invention provides a coal tar pitch-based nickel catalyst, its preparation method, and its application, belonging to the field of solid waste resource recycling and synthetic carbon materials technology. This invention uses a mixed roasting method to prepare a coal tar pitch-based nickel catalyst with micropores and mesopores from the residual coal tar pitch after coal tar extraction. The synergistic effect of active nickel as an active site and the functional groups on the support surface significantly improves its catalytic liquefaction performance, exhibiting the advantages of "low cost, high temperature resistance, and strong adaptability." The preparation method provided by this invention not only offers an effective way for the high-value recycling of coal tar pitch but also provides a low-cost material for green conversion, environmental governance, catalysis, and other fields. It represents a green resource utilization strategy with significant economic and environmental benefits and broad commercial prospects.

This application provides a method for preparing ferrocoke using zinc-containing dust and lean coal, belonging to the fields of iron and steel metallurgy and low-carbon ironmaking technology. The method uses zinc-containing dust and lean coal as raw materials, adding 10% medium-temperature coal tar pitch as a binder by weight of the total ferrocoke. During the ferrocoke preparation process, the metallic elements and their oxides in the zinc-containing dust can promote the reaction between carbon and CO2 at high temperatures, making carbon more easily consumed. Simultaneously, Zn volatilizes and migrates under high-temperature reducing conditions, making the local carbon structure loose and gradually forming interconnected pore structures around the dust particles. These pores facilitate the entry of CO2 gas into the ferrocoke to participate in the reaction, while also helping the generated gas to be discharged in a timely manner, thereby reducing mass transfer resistance. Through this effect, not only is the gasification reaction process accelerated, but the overall reaction performance of the ferrocoke is also improved, giving it higher gasification efficiency, making it suitable for blast furnaces, reducing the coke ratio, and improving smelting efficiency.

The present application belongs to the technical field of petroleum processing and the field of carbon material preparation, and discloses a preparation method of spinnable mesophase pitch based on co-carbonization of coal tar pitch and catalytic cracking slurry. Coal tar pitch and xylene-soluble components of coal tar pitch extracted by xylene are mixed with catalytic cracking slurry, and then co-carbonization reaction is carried out. The reaction product is crushed, secondarily extracted, filtered, and then subjected to low-temperature heat treatment to obtain spinnable mesophase pitch. Through raw material cooperation and multi-stage purification process, the present application realizes high content, high spinnability and structure controllability of mesophase pitch, and the process is simple, environmentally friendly and economical, and is suitable for large-scale production of high-performance pitch-based carbon fiber.

This invention relates to the field of electrochemical energy storage battery technology, specifically to a method for preparing a controllable pitch-based anode material, a hard carbon anode material, and a sodium-ion battery. The preparation method includes: S1. Pre-oxidation treatment: pre-oxidizing the raw materials to obtain an oxidized precursor with an oxygen content of 15%~35%; the raw materials are selected from at least one of pitch, biomass, and phenolic resin; S2. Precursor compositing: mixing the oxidized precursor with a thermoplastic precursor at a mass ratio of 1~5:1 to obtain a composite precursor; the thermoplastic precursor is selected from at least one of petroleum pitch, coal tar pitch, phenolic resin, and aqueous phenolic resin; S3. Carbonization treatment: carbonizing the composite precursor under an inert atmosphere to obtain the pitch-based electrode material. The prepared carbon material has the advantages of uniform structure, stable interface, high reversible capacity, and high initial coulombic efficiency, and the preparation process is simple with controllable product quality.

The utility model relates to coal chemical industry technical field discloses a kind of recovery smelting device for coal pitch, including mounting bracket;Mounting plate, the mounting plate is fixedly connected in the upper portion of the mounting bracket;Smelting pot and discharge port, the smelting pot is fixedly connected in the middle portion of the mounting plate, and the discharge port is fixedly connected in the bottom of the smelting pot;Motor, the motor is arranged in the top of the smelting pot;Rotating rod, the rotating rod top is fixedly connected in the output end of the motor, and the rotating rod bottom is rotatably connected in the inside of the smelting pot and the discharge port;Connecting block and mounting rod, the connecting block is fixedly connected in the outside both sides of the rotating rod.The utility model in, when discharging, avoid the problem that liquid coal pitch is solidified if in the vicinity of discharge port, causes passageway blockage, to improve the discharging efficiency by auger blade rotation in the inside of discharge port.

A method for preparing coal tar pitch-based hard carbon anode material belongs to the field of anode materials. This method uses coal tar pitch as a raw material, leveraging its advantages of wide availability and high carbon content (rich in aromatic compounds). A precursor is obtained by adding a crosslinking agent and a modifier, followed by high-temperature sintering to obtain hard carbon. This invention improves the interlayer spacing of the material through the modifier, resulting in hard carbon with high specific capacity and initial coulombic efficiency, with an initial discharge specific capacity exceeding 300 mA hg. ‑1 .

This invention discloses a prefabricated substation combined foundation and its construction method, belonging to the technical field of prefabricated substation combined foundation construction. The combined foundation includes multiple precast pipe piles and a precast platform. The lower ends of the precast pipe piles are embedded in the foundation, while the upper ends protrude above the ground. The bottom surface of the precast platform is fixedly connected to the tops of all the precast pipe piles. The precast platform includes a load-bearing frame and a panel laid on the frame. During construction, the pile position deviation is first measured and controlled by setting out lines. Then, the piles are driven, and the verticality of the pile body is orthogonally checked using a double theodolite. Next, the precast platform is hoisted and aligned. Finally, it is welded and fixed, and multi-layer composite anti-corrosion treatment is applied. This invention adopts a fully prefabricated dry construction method, eliminating the need for cast-in-place concrete and curing. The construction cycle for a single foundation is shortened from the traditional 35 days to 2 days. Through designs such as a weld height ≥8mm and an epoxy coal tar pitch and fiberglass cloth composite anti-corrosion layer, the connection strength and durability are guaranteed.

The present application provides a kind of coal-based mesophase pitch and its preparation method, belong to pitch preparation technical field.The preparation method includes the following steps: coal-based raw pitch is pretreated, and refined coal pitch is obtained;Distillation is carried out on refined coal pitch, and distillation coal pitch is obtained;Heat polycondensation reaction is carried out on distillation coal pitch, and coal-based mesophase pitch is obtained.The present application uses single coal-based raw pitch as raw material, with the help of the combination of pure physical purification of refining-distillation, cooperatively removes impurities and controls material composition, reduces the quinoline insoluble content of coal pitch to below 0.1wt%.On this basis, through non-catalytic heat polycondensation reaction, the mesophase conversion rate is significantly improved, and the performance consistency of the obtained product as carbon material precursor is improved.The process is simple, controllable, energy-saving and cost-effective, which provides a reliable technical path for the high-value utilization of coal tar pitch and the large-scale stable production of high-end carbon materials.

The utility model relates to a laboratory coal tar pitch melting device belongs to coal tar pitch melting equipment technical field, including experiment table, support frame, melting bucket, apron, exhaust pipe, discharge gate, heating mechanism and stirring mechanism, experiment table upper surface is equipped with melting bucket and support frame, and melting bucket is located below support frame, and melting bucket is equipped with the apron of adaptation, and apron is liftable and is connected in support frame lower extreme through hydraulic cylinder, and apron lower surface still is equipped with stirring mechanism and carries out the stirring to coal tar pitch in melting bucket, and the upper surface of apron is equipped with exhaust pipe, and melting bucket is built -in heating mechanism and carries out heating melting to coal tar pitch in melting bucket, and melting bucket lower extreme's one side fixedly connected with discharge gate carries out the discharge of material, the device simple structure, convenient to use, can effectively improve the evenness of heating when melting, accelerates melting.

This invention discloses a high-toughness ceramic composite material and its preparation method, belonging to the field of ceramic materials technology. The composite material is made from the following raw materials: alumina powder, nanocellulose, coal tar pitch, and sintering aids. This invention uses nanocellulose and coal tar pitch as precursors, generating graphene-like substances through in-situ pyrolysis during hot pressing sintering. The two synergistically construct a multi-dimensional carbon network and tightly coat Al2O3 grains. By controlling the specific ratio of nanocellulose to coal tar pitch and incorporating an 800℃ pre-carbonization step during sintering, the fracture toughness of the resulting composite material is significantly higher than that of a single carbon source system. This invention avoids the problems of high cost, uneven dispersion, and easy destruction of sheets associated with directly adding graphene, and has advantages such as low cost, good process compatibility, and significant toughening effect, showing broad application prospects in aerospace, electronic devices, and mechanical seals.

This invention discloses a method for preparing hard carbon by coupling purification and pre-crosslinking of medium- and low-temperature coal tar-based pitch, comprising the following steps: (S1) mixing medium- and low-temperature coal tar pitch with a mixed extraction solvent of aromatic and aliphatic hydrocarbon solvents, and collecting the lower layer as the extract; (S2) mixing the extract with a ternary composite purification agent for purification, followed by horizontal screw discharge sedimentation and centrifugation separation, and collecting the liquid phase to obtain purified pitch liquid; (S3) removing the extraction solvent and light components from the purified pitch liquid by vacuum distillation to obtain purified pitch; (S4) reacting the purified pitch with a composite pre-crosslinking agent composed of phenolic compounds and multifunctional epoxy resin under an inert atmosphere by heating and stirring to obtain a pre-crosslinking precursor; (S5) carbonizing the pre-crosslinking precursor at high temperature under an inert atmosphere to obtain hard carbon. This invention achieves process coupling of purification and pre-crosslinking, and the resulting hard carbon has a typical disordered layered structure and excellent electrochemical sodium storage performance. The process is green and environmentally friendly and easy to industrialize.

This invention relates to the field of coal tar pitch coking technology, and discloses a method for preparing isotropic coke based on a combination of pretreatment and delayed coking technology. The method includes: mixing coal tar pitch with anthracene oil and then subjecting it to air oxidation pretreatment to obtain oxidized pitch; mixing the oxidized pitch with binder pitch, softening it with anthracene oil, and then adding organic additives and recycled oil to obtain delayed coking feedstock; subsequently subjecting the delayed coking feedstock to a delayed coking reaction to obtain green coke, and then calcining it at high temperature to obtain isotropic coke. This invention regulates the reactivity of coal tar pitch through air oxidation pretreatment and improves the compositional uniformity and flowability of the delayed coking feedstock by combining recycled oil and organic additives, thereby effectively inhibiting the formation of anisotropic structures. The isotropic coke prepared by this method has a high proportion of mosaic structures, high true density, low volatile matter, and high compressive strength, making it suitable for the preparation of isotropic graphite and other carbon materials.

This invention relates to a method for preparing high-density graphite materials using coal tar pitch macromolecular components as raw materials. Belonging to the field of graphite material preparation, it addresses the problem of high requirements for process control in graphite production and the inability to simultaneously meet the demands of high-value-added applications in terms of mechanical properties and graphitization degree. The solution is as follows: Macromolecular components, a byproduct of coal tar pitch modification or purification, are selected as raw materials. A self-sintering graphite preparation method is employed. First, the raw materials are preheated at 150-210℃, then crushed to a D50 of 10-50 micrometers to obtain pressed powder. Next, the pressed powder is formed using warm isostatic pressing at a pressure of 70-180 MPa to obtain a green body. Finally, the green body undergoes conventional carbonization and graphitization treatments to obtain graphite materials with simple production process control and mechanical properties and graphitization degree that simultaneously meet the demands of high-value-added applications.

This invention discloses a coal tar pitch-based supercapacitor carbon, its preparation method, and its application. The preparation method of the supercapacitor carbon includes: dissolving refined coal liquefaction pitch in an organic solvent, and adding ZnCl2, KCl, and potassium citrate to obtain a pitch solution containing an ionic molten salt activator; immersing a biomass template in a dopamine aqueous solution, and then mixing it with the pitch solution to obtain a biomass template-pitch composite; subjecting the composite to oxidation, carbonization, activation, washing, and drying to obtain the supercapacitor carbon; and then mixing the supercapacitor carbon with a nitrogen source and a phosphorus source and heating to perform graphitization doping, thus obtaining the final product. This invention prepares pitch pitch-based supercapacitor carbon with high specific surface area, excellent electrochemical performance, and environmental advantages through a biomass template method, demonstrating the great potential of this preparation process in the field of energy storage.

This application belongs to the field of functional carbon materials technology, specifically relating to a coal tar pitch-based heteroatom co-doped capacitive carbon and its preparation method. The preparation method includes the following steps: pre-oxidizing coal tar pitch to obtain pre-oxidized coal tar pitch; mixing the pre-oxidized pitch, an activator, and a nitrogen source, and then performing carbonization and activation treatments to obtain the coal tar pitch-based heteroatom co-doped capacitive carbon; wherein the activator includes KH2PO4 and / or K2HPO4. The co-doped capacitive carbon of this application uses coal tar pitch as raw material, selecting KH2PO4 or K2HPO4 as a bifunctional reagent with both activation and doping functions for pore structure construction, achieving nitrogen-phosphorus co-doping and improving carbon yield. Simultaneously, this strategy helps optimize the wettability of the electrode-electrolyte interface, thereby enhancing electronic conductivity and ion diffusion rate, further improving the surface charge storage capacity of the material. Furthermore, KH2PO4 or K2HPO4 as an activator has the advantage of being environmentally friendly, avoiding the use of strong acids or strong bases.

This invention provides an epoxy-modified coal tar pitch heavy-duty anti-corrosion coating and its preparation method, belonging to the field of coating technology. The method includes the following steps: dispersing Fe-Al LDH precursor powder in a mixed liquid, ultrasonically dispersing under heating, adding PTMS dropwise, reacting for a period of time after the addition is complete, then adding KH-560 dropwise, heating, reacting, centrifuging, washing, and vacuum drying to obtain modified LDH; adding coal tar pitch and CGE to a reaction vessel, homogenizing, shearing and mixing, adding modified LDH powder and mixing to obtain activated asphalt slurry; heating epoxy resin to melt it, pouring it into the activated asphalt slurry, stirring and mixing, cooling, adding mica iron oxide and precipitated barium sulfate, pre-dispersing, grinding, and discharging to obtain the main paint component; when ready for use, stirring and mixing the cashew phenol amine epoxy curing agent with the main paint component to obtain the finished product. The epoxy-modified coal tar pitch heavy-duty anti-corrosion coating obtained by this invention can effectively improve the anti-corrosion performance of the coating.

This invention discloses a method for preparing a nitrogen-doped carbon framework-anchored bismuth nanoflower electrode material and its application in sodium-ion battery anodes. Using coal tar pitch as the carbon framework precursor material and metallic bismuth as the active electrode material, a nitrogen-doped carbon framework-anchored bismuth nanoflower electrode is constructed using a recyclable metal salt as a template via solvothermal and high-temperature carbonization methods. In this electrode material, the metallic bismuth microstructure exhibits a nanoflower-like structure, while the nitrogen-doped amorphous carbon forms a three-dimensional framework structure, with the metallic bismuth nanoflowers uniformly dispersed and anchored on the carbon framework. The electrode material prepared by this method possesses excellent performance, controllable structure, high operational efficiency, low cost, and recyclable salt templates, demonstrating broad application prospects. This invention can be applied to the preparation of sodium-ion battery anode materials.

This invention discloses a low-cost, high-density graphitized carbon block and its preparation process, which is prepared from the following raw materials: sponge coke with a particle size of 6-9 mm; sponge coke with a particle size of <0.5 mm; shot coke with a particle size of 0.5-6 mm; shot coke with a particle size of <0.5 mm; and coal tar pitch. The shot coke is calcined at 1300℃-1500℃ for 1-5 minutes and then at 1900℃-2200℃ for 1-5 minutes before being pulverized. This invention extensively utilizes shot coke, which is not used in the traditional production of graphitized cathode carbon blocks, thus solving the bottleneck in shot coke usage and reducing production costs. It employs an optimal particle size ratio of sponge coke and shot coke, as well as a mixing and molding process; combined with a unique calcination temperature rise curve, it achieves excellent strength, thermal conductivity, resistivity, sodium penetration expansion rate, and yield; making it highly suitable as a cathode material for electrolytic cells and fully meeting the needs of low-cost mass production in industrial applications.

This invention belongs to the field of coal chemical technology and discloses a method for preparing spinnable mesophase pitch using a dual thermal polycondensation-solvent extraction process based on pyrolytic pitch evaluation. Coal tar pitch and other raw materials are subjected to solvent extraction to remove primary insolubles and ash, yielding a soluble solution. This solution is then subjected to atmospheric distillation to remove the solvent, resulting in refined coal tar pitch. The refined coal tar pitch is then subjected to heat treatment in a high-temperature, high-pressure reactor to obtain pyrolytic pitch. After property analysis of the pyrolytic pitch, a second thermal polycondensation is adaptively set and adjusted. The pyrolytic pitch is then separated by solvent extraction to obtain insolubles. These insolubles are then vacuum dried and subjected to a second heat treatment to obtain spinnable mesophase pitch. The dual thermal polycondensation-solvent extraction process based on pyrolytic pitch evaluation employed in this invention can significantly improve the anisotropy content of the mesophase pitch and result in a wide-area streamlined optical texture.