53 results about "Coal tar product" 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 invention discloses an integrated device for coal tar separation and recovery and electrostatic precipitator in coal gangue decarbonization tail gas, belonging to the field of flue gas treatment technology. It includes a dust collector, a coal tar separation and collection hopper, a radial flow rotary disc tar collector, and an electrostatic precipitator unit. The radial flow rotary disc tar collector is installed in the coal tar separation and collection hopper and includes an inner air-flowing central pipe, an outer pipe, multiple hollow collection discs, and a rotation drive assembly. A jacket is formed between the inner air-flowing central pipe and the outer pipe for introducing a heat exchange medium. The inner cavity of the hollow collection discs communicates with the jacket. A radial exhaust channel for tail gas is provided on the inner air-flowing central pipe. During operation, the heat exchange medium is switched to keep the disc surface at a low temperature during the condensation and collection stage, where tar in the tail gas condenses and adheres to the disc surface. During the desorption and regeneration stage, the heat exchange medium is switched to a high temperature and rotates at high speed, using centrifugal force to throw the tar out and collect it. This achieves anhydrous separation and resource recovery of tar, avoiding tar contamination of the electrostatic precipitator unit.

The present application relates to a kind of hydrogenation catalyst, the preparation method of hydrogenation catalyst and coal tar hydroprocessing method, the hydrogenation catalyst includes carbon-based carrier and hydrogenation active component supported on the carbon-based carrier;Metal element in the hydrogenation active component exists in the form of metal element;Metal element in the hydrogenation active component is selected from one or several of Fe, Co and Ni;Metal element in the hydrogenation active component is 2-20 nm in grain size.The hydrogenation catalyst provided by the present application uses carbon-based carrier to support hydrogenation active component, and metal element in the hydrogenation active component exists in the form of metal element, which is beneficial to improve the dispersibility of hydrogenation active component on carbon-based carrier, when it is used for hydrogenation reaction, while ensuring high liquid yield and high mechanical impurity removal rate, it can significantly improve asphaltene conversion rate and carbon residue removal rate.

The application discloses a preparation method and application of a small-molecule sugar modified aromatic hydrocarbon-rich carbon-based negative electrode material, and belongs to the technical field of new energy storage materials. The method uses coal tar as a main carbon source, and a trace amount of sucrose is mixed and pretreated according to a preset proportion; in a high-temperature co-pyrolysis process under an inert atmosphere, the abundant oxygen-containing functional groups of the sucrose are ingeniously used as cross-linking anchor points to induce in-situ molecular-level cross-linking and thermal polycondensation reactions of aromatic components in the coal tar, so that a composite hard carbon material rich in a large number of closed pores is successfully prepared. The process route is simple, the raw material cost is low, and industrial mass production is easy to realize; the obtained hard carbon material has high closed pore volume and excellent compactness, and significantly improves the initial coulombic efficiency, sodium storage capacity and long cycle life of a sodium ion battery, and is a high-capacity negative electrode material for the sodium ion battery with great commercialization potential.

This invention belongs to the field of xylene preparation technology, specifically providing a high-efficiency hydrorefining process for preparing xylene from coal tar. The process includes: Step 1: using medium-temperature coal tar as raw material, coking and decarbonizing to separate and collect mixed fractions; Step 2: hydrorefining the mixed fractions in a first hydrorefining unit to separate light components and tail oil; hydrocracking the tail oil in a second hydrorefining unit to separate and collect heavy naphtha; Step 3: mixing the heavy naphtha obtained in Step 2 with the cycloalkane-rich light components and reacting in a catalytic reforming unit to obtain a reforming product with high aromatic potential; Step 4: sending the reforming product obtained in Step 3 into an aromatic separation unit for extraction or distillation to obtain high-purity benzene, toluene, and a mixed aromatic hydrocarbon rich in xylene; further separating the xylene-rich mixed aromatic hydrocarbon through adsorption or distillation to collect the xylene product. This process can improve yield while fully utilizing byproducts.

The application discloses a coal tar component online spectrum detection early warning method and system, and belongs to the field of coal chemical process detection and safety management and control. The method comprises the following steps: continuously sampling and pre-treating the to-be-detected sample at constant temperature and pressure; splitting to an atomic emission and near-infrared spectrum unit for synchronous detection of inorganic components and organic components; after pre-processing the double-spectrum data, performing data fusion and two-way cross correction on the double-spectrum data through multivariate correction and two-way matrix compensation models to obtain full-component detection results; matching the results with a threshold value and a risk rule library to generate a graded early warning signal, uploading the signal to a distributed control system and issuing a process adjustment instruction to form a closed loop. The application realizes synchronous online detection of organic and inorganic components, eliminates matrix interference through two-way cross correction, constructs a graded early warning and process linkage system, and improves the safety management and control level of coal tar processing.

The application discloses a method for preparing coal-tar pitch-based porous carbon by using double-salt compounds (K2CO3 and Na2CO3) and potassium hydroxide and application thereof. The pore diameter of the material activated by KOH is adjusted by adding K2CO3 and Na2CO3, and the sputtering and eruption of the sample in the activation process is avoided, and the equipment is not corroded. The application comprises the following steps: after coal tar that is crushed is uniformly mixed with an activating agent, simple one-step activation is carried out at high temperature, wherein the specific surface area of the porous carbon material can reach about 2000 m 2 / g, and the pore volume is between 0.98 and 1.29 cm 3 / g. When the porous carbon material is used as an electrode material of a super capacitor, the material shows high specific capacitance and good rate performance. The application provides a preparation method of high-specific-surface-area porous carbon, and the reaction process is mild.

The application relates to a coking coal additive and a preparation method thereof, a coking coal composition and a coking method. The additive comprises the following raw material components in parts by mass: 20-30 parts of modified clay, 10-15 parts of an organic binder, 5-10 parts of an oxidizing agent, 3-8 parts of a pyrolysis catalyst and 30-50 parts of a first solvent; wherein the modified clay comprises silane coupling agent modified montmorillonite; and the organic binder comprises coal tar heavy component and polyvinyl alcohol. The coking coal additive has the advantages of high thermal strength and low reactivity of the prepared coke under the premise of increasing the proportion of low-rank coal.

The present application relates to a kind of low-temperature coal tar hydrogenation catalyst for deoxygenation of aromatic hydrocarbon and its preparation method and application.The preparation method includes: the precursor of molybdenum, cationic surfactant, carrier are mixed, after drying, obtain dry product;The dry product is sulfided, to obtain the low-temperature coal tar hydrogenation catalyst for deoxygenation of aromatic hydrocarbon;Wherein, the molar ratio of cationic surfactant and molybdenum is 0.8-1.5;Mo in the catalyst, the mass fraction is 5-20 wt%.The present application also provides the catalyst prepared by the above method and the hydrogenation refining method of coal tar based on the catalyst.The catalyst has higher stacking number, improves the edge / rim site ratio, so that the selectivity of aromatic hydrocarbon in hydrogenation product is improved;Lamella length reduces, the proportion of Mo atom in edge site is higher, higher Mo atom utilization rate and the number of active sites make hydrogenation deoxygenation activity improve.

The utility model relates to air cooler equipment technical field especially relates to a kind of spray humidification type coal tar hydrogenation air cooler cooling spray head, including cooling tower etc., the top of cooling tower is equipped with evaporation tank, the upper portion of water separator is equipped with axial fan, the bottom of evaporation tank is equipped with multiple water curtains, cooling tower interior is equipped with radiator pipe near water curtain, one end of radiator pipe is connected with hot water pipe, the other end of radiator pipe is connected with first water pump, the other end of first water pump is connected with cold water pipe, the other end of hot water pipe and cold water pipe is connected with cooling indoor unit.The utility model atomizes water by the atomizing nozzle of spray pipe, air flow is accelerated in combination with water curtain structure and axial fan, the contact area of water and air is greatly increased, water evaporation rate is improved, so the cooling efficiency of coal tar hydrogenation product is significantly improved, and the cooling demand of large-scale production is satisfied.

The application belongs to the technical field of sodium ion batteries, and particularly relates to a sodium ion battery hard carbon negative electrode material taking bamboo and coal tar as precursors and a preparation method thereof. The method is prepared through two-step processes of air pre-oxidation and high-temperature carbonization, and utilizes the liquid-solid composite synergistic effect of the coal tar and the bamboo: the aromatic components in the coal tar fill the surface defects and excessive pores of the bamboo in the carbonization process, reduce the specific surface area, and reduce the irreversible capacity loss; meanwhile, a similar bonding bridge structure is constructed on the surface of the carbon skeleton, the structural stability is enhanced, and the cycle pulverization is inhibited. The obtained material significantly improves the initial coulombic efficiency, the cycle life and the tap density, and is suitable for large-scale production due to the wide source of raw materials and low cost.

This invention discloses a coal tar hydrogenation catalyst, its preparation method, and its application. The catalyst comprises a support and an active metal component loaded on the support. The support has a spherical core-shell structure, with the core layer being alumina and the shell layer being an alumina-silica composite material. The active metal component is at least one of a Group VIB metal and / or a Group VIII metal. The preparation method includes the following steps: (1) mixing boehmite, a surfactant, and an oil phase material to obtain a first material; (2) preparing an acidified silica-containing solution; (3) mixing alumina sol, the acidified silica-containing solution, a curing agent, an emulsifier, and an additive to obtain a second material; (4) mixing the first material and the second material to prepare a support; and (5) introducing the active metal component onto the support to obtain the coal tar hydrogenation catalyst. This invention enables a gradual hydrogenation reaction of coal tar on a catalyst, improves the properties of the coal tar hydrogenation product, provides higher quality raw materials for subsequent processes, and improves the catalyst's water resistance.

The application discloses a method for preparing aviation kerosene by step-by-step hydrogenation of medium and low temperature coal tar, which adopts a combined process of pre-fractionation, suspension bed and fixed bed. After the whole fraction of medium and low temperature coal tar is preliminarily separated by a feed gas-liquid separation tank, the light component at the top is introduced into a subsequent separation system, the anthracene oil fraction at the side line is introduced into a two-stage hydrogenation cracking reactor as a hydrogen-donor solvent, and the heavy component at the bottom is introduced into a raw material tank as the raw material of the first-stage hydrogenation cracking reactor. The suspension bed hydrogenation cracking is provided with two-stage reactors, the product of the first-stage hydrogenation cracking reactor is introduced into the two-stage hydrogenation cracking reactor for deep hydrogenation cracking after preliminary gas-liquid separation, the anthracene oil separated from the hydrogen-donor solvent raw material and the externally supplemented hydrogen-donor solvent are added to the inlet of the two-stage hydrogenation cracking reactor to promote the hydrogenation cracking of heavy components, and a pressurizing pump and a heating furnace are additionally arranged at the inlet of the reactor. The method can reduce the gas yield in the reaction process, improve the liquid product yield, reduce the coking risk of the device and prolong the operation cycle of the device.

Pitch production systems utilizing coal tar or decant oil for coal or petroleum based pitch are disclosed. Total pitch production yields are increased by heat treating distillate fractions from the pitch production process. A heat treatment system and process are disclosed in embodiments. 5 The heaviest distillates having the highest molecular weights are subjected to heat treatment, though other embodiments contemplate heat treating a variety of combined distillate fractions. The heat treatment systems require heat soaking the distillate(s) at elevated temperatures of 459 - 535°C at a near-constant temperature with near-uniform flow. A fraction of the heat-treated distillate may be reintroduced to the pitch production system as part of a continuous process.20 24 27 83 36 12 D ec 2 02 4 2 0 2 4 2 7 8 3 3 6 1 2 D e c 2 0 2 4

The utility model discloses a kind of sampling devices for coal tar test, it is related to coal tar test technical field, including support platform, the support platform includes base, fixed column, mounting plate and coal tar tank, the bottom of the fixed column is fixedly connected with the left side of base top, the bottom of the mounting plate is movably connected with the top of fixed column, the coal tar tank is installed in the top of base;The bottom of the mounting plate is provided with sampling assembly, the top of mounting plate is provided with adjusting assembly, and the sampling assembly and adjusting assembly are used for sampling coal tar.The utility model is cooperated by setting support platform, sampling assembly, adjusting assembly, lifting assembly and stirring assembly, sampling is carried out to coal tar by sampling assembly, the position of sampling assembly is adjusted by adjusting assembly, coal tar is stirred by stirring assembly, the problem that coal tar is stratified after long time standing, and the problem that sampling sample is affected is solved.

The application discloses a low-rank coal pressurized pyrolysis device and method, and relates to the technical field of coal chemical industry. The upper end of a pyrolysis reactor is provided with a feeding port, and the lower end of the pyrolysis reactor is provided with a discharging port. The pyrolysis reactor is connected with a pressurizing structure, which is used for adjusting the pressure inside the pyrolysis reactor. From top to bottom, the pyrolysis reactor is internally provided with a gas collecting structure, a gas distribution structure and a cooling structure. The gas distribution structure is used for feeding a heat medium, and the gas collecting structure is used for collecting gas. The gas collecting structure is connected with a fractionating tower, the fractionating tower is connected with a gas-liquid separator, the gas-liquid separator is connected with the gas distribution structure and a hydrogen production device respectively, the hydrogen production device is connected with the gas distribution structure, and the gas-liquid separator is used for obtaining coal gas, and the hydrogen production device is used for obtaining hydrogen. The application can improve the yield of coal tar, improve the calorific value of coal gas and reduce energy consumption.

This invention relates to the field of special fuel technology and discloses a method for preparing special fuels from coal tar, comprising: (1) performing a first fractionation on the raw coal tar to obtain a distillate oil with a distillation range of 180-420℃; (2) extracting the distillate oil to obtain an extract and a raffinate, and then performing adsorption separation on the raffinate to obtain a purified oil product; (3) optionally hydrorefining the purified oil product; (4) performing a second fractionation on the purified oil product and / or the hydrorefined product to cut it into No. 1 distillate oil, No. 2 distillate oil, and No. 3 distillate oil; (5) alkylating the No. 1 distillate oil to obtain No. 1 special oil; hydrosaturating the No. 2 distillate oil to obtain No. 2 special oil; and cracking cycloisomerizing the No. 3 distillate oil to obtain No. 3 special oil; and (6) then refining and blending. This method can flexibly prepare special fuels with different properties, and the fuel density and calorific value range are large.

A high-purity oil and gas purification manufacturing system and method, belonging to the field of oil and gas purification, includes a material pyrolysis device, a cyclone dust collector, a filter tube dust collector, a primary oil washing tower, a secondary oil washing tower, a demister, a high-gravity dust collector, an indirect cooling tower, an electrostatic precipitator for tar, a gas storage tank, a heavy oil tank, a light oil tank, a heavy oil centrifuge, a fan, a feed pipe, and a cooling device. To address the problems of incomplete purification, low product purity, single product type, low resource utilization, low recovery rate of light components, and high subsequent processing costs in existing technologies, this invention provides a high-purity oil and gas purification manufacturing system and method. This invention significantly improves the purity of oil and gas through multi-stage, multi-principle deep purification. It can produce coal tar with different density compositions by adjusting process parameters, maximizing resource utilization and improving light oil yield and gas quality. The produced high-purity oil and gas can be directly used for further processing, eliminating the need for reprocessing.

This invention discloses a method for preparing a composite hard carbon anode material and its application in sodium-ion batteries. The method for preparing the hard carbon anode material includes the following steps: S1, crushing walnut shells and pre-carbonizing them in air; S2, mixing the pre-carbonized walnut shells with coal tar at a certain mass ratio to form a mixture, and placing the mixture in a tube furnace for high-temperature carbonization under an inert atmosphere to obtain the composite hard carbon anode material. The composite hard carbon anode material prepared by this invention exhibits excellent electrochemical performance as an anode material for sodium-ion batteries, and the preparation method is simple, the raw materials are readily available, the cost is low, and the carbon yield is high, making it suitable for large-scale production.

The present application provides a method for extracting phenolic substances from coal tar, which comprises: primary extraction: extracting poor phenol oil by using a composite organic amine aqueous solution to obtain a dephenolized oil A and a rich phenol extraction phase A; secondary extraction: extracting a rich phenol fraction oil by using the rich phenol extraction phase A to obtain a dephenolized oil B and a rich phenol extraction phase B, wherein the poor phenol oil is obtained by mixing coal tar and the dephenolized oil B, and the rich phenol fraction oil is a fraction oil of the coal tar; acidification: acidifying the rich phenol extraction phase B by using an acidifying agent to obtain a crude phenol oil C and a composite organic amine aqueous solution rich in the acidifying agent through separation; and extractant regeneration: removing the acidifying agent from the composite organic amine aqueous solution rich in the acidifying agent to obtain the composite organic amine aqueous solution for recycling in the primary extraction step. The method of the present application is resource-saving, green and pollution-free, has low process energy consumption, and the crude phenol oil product has high purity.

The application relates to the technical field of materials, and provides a molecular imprinting polymer, a preparation method thereof and a method for targeting and enriching phenolic compounds in coal tar creosote. The preparation method of the molecular imprinting polymer comprises the following steps: mixing a template molecule, a main functional monomer, an auxiliary functional monomer, a crosslinking agent, an initiator, a carrier and a pore-forming agent, and performing first stirring; introducing nitrogen into the system, and sequentially performing a pre-polymerization reaction, a main polymerization reaction and post-treatment to obtain a white granular polymer; performing Soxhlet extraction on the white granular polymer by using a mixture of methanol and acetic acid, and then performing vacuum drying to obtain the molecular imprinting polymer. The molecular imprinting polymer provided by the application has a high selective coefficient for phenolic compounds.

The present application relates to the technical field of needle coke preparation, in particular to a process for producing needle coke by co-carbonization of aromatic oil and heavy coal tar, comprising the following steps: S1, adding aromatic oil into a coke tower, heating to a first temperature, and controlling the pressure value to be a first pressure; S2, continuously adding heavy coal tar into the coke tower, heating to a second temperature, and increasing the pressure to a second pressure to obtain needle coke; S3, continuously reacting the needle coke system at the second temperature, and then sequentially introducing nitrogen gas at a third temperature, nitrogen gas at a fourth temperature, and nitrogen gas at a fifth temperature into the system, and finally cooling the system by nitrogen gas at a sixth temperature to obtain needle coke. The present application expands the source of needle coke raw materials, improves the product quality, and shortens the reaction period.

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 paper discloses a method for preparing and applying composite hard carbon materials based on crop straw and coal coking by-products, relating to the field of new energy materials technology. The method uses crop straw and coal tar (a coal coking by-product) as raw materials. The crop straw is pre-carbonized in air to retain its natural three-dimensional tubular framework and form a porous network, then mixed and impregnated with liquid coal tar, and finally carbonized at high temperature in an inert atmosphere. The liquid coal tar deeply penetrates the pores of the straw and transforms into dense amorphous graphite domains at high temperature, physically filling and stitching the open macropores of the straw, transforming the loose open pores into sodium-storing closed pores, and reshaping it into a dense, robust 3D interconnected bulk structure. This invention abandons the traditional and cumbersome acid-base impurity removal and pore-forming process. It utilizes the dense coating and in-situ reinforcement of liquid coal tar to reduce the specific surface area of ​​the material and improve the first coulombic efficiency and compaction density. It effectively solves the pain points of low first efficiency and poor energy density of traditional biomass hard carbon. The preparation process is simple, environmentally friendly, and low in cost, and it is easy to realize the large-scale industrialization of sodium-ion battery anode materials.

The application discloses a method for preparing mesophase pitch based on normal-pressure multistage thermal polycondensation, which comprises the following steps: performing first-stage normal-pressure thermal polycondensation on raw materials and performing thermal filtration to remove high-activity easy-coking pitch and heavy gum and other complex heavy components; and performing second-stage and above normal-pressure thermal polycondensation on the filtrate as raw materials to realize controllable growth and hierarchical regulation of mesophase structures. The whole process of the method is performed under normal-pressure conditions, and no pressure equipment and complex pretreatment are needed, so that the method has low requirements on equipment, high safety, simple process and strong adaptability to raw materials, and can continuously obtain mesophase pitches with different qualities, and is suitable for various heavy raw materials such as coal tar, catalytic cracking slurry oil and vacuum residue, and provides an innovative solution for large-scale and safe production of mesophase pitch.

The application discloses a preparation method and application of a sodium ion battery polymerization cross-linking composite hard carbon negative electrode material, and relates to the technical field of new energy materials. The method uses polymerized sugar and coal tar as raw materials, and first performs pre-carbonization treatment on the polymerized sugar in an air atmosphere, and then uniformly mixes the polymerized sugar with the coal tar; subsequently, high-temperature carbonization is performed under an inert atmosphere, and finally, a hard carbon material is prepared, and the hard carbon material is used for assembling a high-specific-capacity sodium ion battery. The process route is simple, the raw materials are environment-friendly, and the process route has the potential for large-scale production. The prepared hard carbon has superior electrochemical performance, and is a sodium ion battery negative electrode material with application prospect.

The application discloses a method for preparing benzothiophene by using a coal tar byproduct thiophene, and relates to the technical fields of coal tar deep processing and organic heterocyclic compound synthesis. The method comprises the following steps: firstly, distillation separation is performed on the coal tar byproduct to obtain a thiophene raw material; then, the thiophene raw material is subjected to a synthesis reaction with 2,5-dimethoxytetrahydrofuran in a 500L batch reaction kettle under the action of an acidic ionic liquid catalyst, and the reaction end time is determined by using an end point criterion based on the thiophene conversion rate and continuous sampling stability; and finally, extraction separation, filtration and normal pressure distillation or reduced pressure distillation purification are sequentially performed on the reaction product to obtain a benzothiophene product. The method takes into account high-value utilization of raw materials, large-scale reaction control and product purification output, and is favorable for improving the stability of the benzothiophene preparation process and the product yield and purity.