75 results about "Coal liquefaction" patented technology

The invention discloses a direct coal liquefaction pump thermal wear prediction method considering a high temperature effect, and belongs to the technical field of fluid machinery and reliability engineering.The method comprises the steps that the high temperature effect is considered, a liquid phase control equation and a solid particle dynamic model are subjected to coupling iteration, and a solid-liquid two-phase flow numerical model is obtained; the method comprises the following steps: performing full flow field modeling on a fluid domain formed by flow passage components of a pump for direct coal liquefaction, and performing grid division on the fluid domain; constructing a heat-flow-solid multi-field coupling calculation system, and solving the solid-liquid two-phase flow numerical model by adopting a large eddy simulation method based on temperature correction and a discrete element method coupling method to obtain information of flow fields and particle fields at all positions in the pump; operation condition parameters are obtained, the thermal wear rate is obtained through a thermal wear rate calculation formula on the basis of flow field and particle field information of all positions in the pump, and the predicted wear amount of the flow passage component is obtained; and the prediction precision and applicability of the wear model are improved.

The invention discloses an enhanced separation device and method for washing, solid removal and defoaming of a coal liquefaction system. The enhanced separation device comprises a vertical tank body, and a gas outlet and a solid-liquid outlet are formed in the top end and the bottom end of the vertical tank body respectively; a momentum fin unit, a micro-washing spraying device, an inlet separation distributor and a hydraulic spray head are sequentially arranged in the vertical tank body from top to bottom, and a material inlet is formed in the position, corresponding to the inlet separation distributor, of the side wall of the vertical tank body; the momentum fin unit and the micro-washing spraying device are positioned above the inlet separation distributor; the hydraulic spray head is obliquely upwards arranged on the inner wall below the inlet separation distributor; and the solid-liquid outlet is connected with a circulating pump through a pipeline. The device is compact in structure, the separation process is simplified, fine particles are trapped and separated only through gravity settling, the inertia effect and the like, and efficient and stable operation of the system is facilitated.

The invention belongs to the technical field of capacitor carbon preparation, and particularly relates to coal liquefaction pitch-based heteroatom-doped spherical capacitor carbon and a preparation method thereof. According to the preparation method of the coal liquefied asphalt-based heteroatom-doped spherical capacitance carbon, the coal liquefied asphalt is adopted as a raw material, so that the production cost is reduced, clean and efficient utilization of coal resources is realized, and the specific surface area, the microporosity, the electrical conductivity, the structural stability and the capacitance performance of the traditional capacitance carbon are improved; the range of production raw materials is widened, the preparation process is simplified, and pollutants are reduced.

The invention discloses a modularized and multi-objective optimized carbon emission-energy consumption-cost collaborative optimization method for direct coal liquefaction oil preparation, and relates to the technical field of coal chemical industry technical optimization. Comprises: determining an accounting boundary; constructing a system model of the direct coal liquefaction oil production process; determining emission sources of the chemical process module and the self-contained power plant module; a module based on a direct coal liquefaction oil production system model is linked with a plurality of emission reduction technology interfaces to construct an emission reduction technology module; respectively establishing objective functions; defining constraint conditions of the target function; constructing a multi-objective optimization function of direct coal liquefaction oil production; relevant parameters of the multi-objective optimization model are collected; solving a Pareto optimal solution according to a Python code constructed by a multi-objective optimization problem of direct coal liquefaction for oil production; and outputting an optimization result, namely a Pareto optimal solution set. The modular design is adopted, emission sources of all links of direct coal liquefaction oil preparation are accurately recognized, and a plug-and-play interface is constructed for various emission reduction technologies.

This invention discloses a coal liquefaction residue-based warm-mix self-healing dual-function asphalt modifier and its preparation method, belonging to the field of road engineering materials technology. The modifier consists of the following components by mass percentage: plasma-activated coal liquefaction residue micropowder (40-60%), warm-mix functional agent (10-20%), self-healing microcapsules (15-25%), interface reinforcing agent (5-10%), and coupling agent (2-5%). The plasma-activated coal liquefaction residue micropowder has a particle size of 0.15 mm, a specific surface area of ​​300-400 m² / g, and a surface hydroxyl content of 1.2-2.0 mmol / g. Its porous structure is used to adsorb and slowly release the warm-mix functional agent, and also serves as a carrier for the microcapsules. The warm-mix functional agent is a compound of sodium alkylbenzene sulfonate / polyoxyethylene ether and glyceryl stearate / methyl oleate, which are oriented at 120-130℃ to form a lubricating interface layer, reducing the viscosity of the asphalt mortar by more than 30%. The self-healing microcapsules use polyurethane as the shell material and contain asphalt recycler, sulfur, and plasticizer in the core material. They can rupture and release the core material when microcracks propagate.

The present disclosure relates to a pressure reducing control valve and a coal liquefaction device, wherein the pressure reducing control valve comprises a valve body, a valve seat and a valve core, the valve seat is fixed inside the valve body, one end of the valve core is connected with an actuator, the other end can move towards or away from the valve seat, a plurality of sleeves are arranged inside the valve body and stacked in the vertical direction at the bottom of the valve seat, the top surface of the sleeve is formed with a through hole for the valve core to pass through, and the top of the sleeve is radially inwardly recessed to form a stepped surface, the opening of the upper one of the two adjacent sleeves is sleeved on the stepped surface of the lower sleeve, and flow holes are arranged on the sleeve, which can disperse the fluid pressure through the sleeve in layers, reduce the risk of single-point seal failure, and ensure coaxiality through the radial step cooperation to avoid valve core jamming. The first sealing gasket between the adjacent sleeves closely contacts with the mounting surface to form a sealing system, which can still maintain the overall sealing performance even if the single-layer seal fails.

The application provides a preparation method of a sodium ferrous disulfide catalyst and application of the sodium ferrous disulfide catalyst in direct coal liquefaction, and relates to the technical field of coal liquefaction.The preparation method of the sodium ferrous disulfide catalyst comprises the following steps: mixing a ferric salt solution and a Na2S solution or a NaHS solution, performing a precipitation reaction, and obtaining a precipitation reaction system; and aging the precipitation reaction system, and performing solid-liquid separation to obtain the sodium ferrous disulfide catalyst.The preparation method of the NaFeS2 catalyst is simple in process, mild in preparation condition, does not need heating and pressurization, has a wide source of raw materials, is low in cost, and is easy to be industrialized.The obtained sodium ferrous disulfide has high catalytic activity as a catalyst for direct coal liquefaction, and the oil yield and conversion rate of direct coal liquefaction are higher than those of a catalyst used in the industry at present.

The present application provides a solvent oil, a preparation method and use thereof. The solvent oil is used for refining treatment of coal liquefied pitch, has good solid-liquid separation effect, is easy to recycle and reuse, can obtain refined pitch with high yield, low ash content and low quinoline insoluble content under the condition of low solvent oil consumption, and can meet the application requirements of high-end carbon materials. The solvent oil contains C 10 ~C 16 paraffins, cycloparaffins with ring number of 1-3, monocyclic aromatic hydrocarbons, bicyclic aromatic hydrocarbons and tricyclic aromatic hydrocarbons; the content of the C 10 ~C 16 paraffins is 5.0-10.5 wt%, the content of the cycloparaffins is 10.0-25.3 wt%, the content of the monocyclic aromatic hydrocarbons is 30.0-44.0 wt%, the content of the bicyclic aromatic hydrocarbons is 20.0-50.0 wt%, and the content of the tricyclic aromatic hydrocarbons is 0.5-5.0 wt%; the nitrogen content of the solvent oil is 200-2500 ppm, the sulfur content is 5-500 ppm, and the distillation range of the solvent oil is 170-350 DEG C.

The present invention relates to the technical field of separation of direct coal liquefaction oil, and provides a method for separating and purifying monocyclic aromatic hydrocarbons from direct coal liquefaction oil. The method comprises: (1) performing fractional distillation and composition analysis on direct coal liquefaction oil to determine a fraction having the highest content of monocyclic aromatic hydrocarbons; (2) removing low-carbon alkanes and cycloalkanes from a selected fraction by means of column chromatography; (3) separating toluene, a monocyclic aromatic hydrocarbon mixture, and high-carbon alkanes by means of an atmospheric and vacuum distillation column; (4) purifying ethylbenzene from the monocyclic aromatic hydrocarbon mixture by means of an extractive distillation column; and (5) purifying p-xylene by means of a solvent recovery column. The separation method provided by the present invention can make full use of the composition characteristics of direct coal liquefaction oil to obtain two or three high-purity monocyclic aromatic hydrocarbon monomers at a time without introducing additional chemical reaction steps, showing significant economic and environmental benefits.

The invention discloses a stabilizing dispersant for a direct coal liquefaction catalyst and application of the stabilizing dispersant. The stabilizing dispersant for the direct coal liquefaction catalyst comprises sodium alpha-olefin sulfonate, a zwitterionic surfactant and sodium polyacrylate. According to the stable dispersing agent disclosed by the invention, a ternary composite dispersing agent system with alpha-sodium olefin sulfonate coordination chemical adsorption, zwitterionic surfactant charge compensation gap filling and sodium polyacrylate vitrification coating is adopted, so that molecular-level anchoring and dry-state stable immobilization of a micron catalyst in pulverized coal are realized, and the micron catalyst can be controllably released in solvent oil; the dispersion stability of the catalyst is improved, the direct coal liquefaction efficiency is improved, and the liquefaction reaction oil yield is improved.

The invention relates to a comprehensive utilization method of direct coal liquefaction residue raffinate, in particular to the field of coal chemical industry, and the comprehensive utilization method comprises the following steps: carrying out dry distillation treatment on the direct coal liquefaction residue raffinate to obtain an aromatic hydrocarbon-rich liquid phase product, a combustible gas phase product and an intermediate solid phase; and the intermediate solid phase is sequentially subjected to steam oxygen modification treatment, flotation treatment and purification upgrading treatment, and the carbon-based material is obtained. According to the comprehensive utilization method provided by the invention, the direct coal liquefaction residue raffinate is sequentially subjected to low-temperature dry distillation, low-temperature steam oxygen modification treatment, combined flotation and purification upgrading treatment to obtain aromatic hydrocarbon-rich high-value chemicals and combustible gas for supplying heat to a system; the method has the advantages of low technical cost and high added value of the product, and can enrich a direct coal liquefaction product system and promote the extension of a direct coal liquefaction industrial chain and the improvement of economic benefits.

The invention provides a continuous production method of coal-based quantum carbon dot in-situ coated slow-release urea in an evaporation granulation tower, and relates to the technical field of slow-release fertilizer production.The continuous production method comprises the following steps that S1, coal liquefaction residues serve as a carbon source, electrolysis is conducted after carbonization and polyvinylidene fluoride forming are conducted, and coal-based quantum carbon dot dispersion liquid is prepared; s2, transforming an evaporation granulation tower, arranging three layers of coaxial atomizing nozzles in the height direction of a tower body, and constructing a gradient temperature field in the tower; s3, urea melt liquid, coal-based quantum carbon dot dispersion liquid and a modified silane coupling agent are sprayed into the tower through three layers of coaxial atomization nozzles; the three steps of granulation, coating and curing are continuously completed in the same evaporation granulation tower, the production period is shortened, meanwhile, particle transfer damage is avoided, the yield is increased, the industrial production cost is greatly reduced, the quantum carbon dots are prepared with the industrial by-product coal liquefaction residues as the carbon source, the solid waste treatment problem of the coal liquefaction residues is solved, and the production cost is reduced. The carbon source cost is also reduced.

The invention relates to the technical field of coal chemical industry separation, in particular to a coal liquefaction oil-water separation system and method, and the system comprises an oil phase separation unit, a distillation unit, a cooling condensation unit, an oil-water separation unit and a power unit; the oil phase separation unit is used for separating materials to obtain a water-containing oil phase; the distillation unit is used for carrying out evaporation treatment on a water-containing oil phase; the cooling and condensing unit is used for cooling water vapor when the water-containing oil phase is subjected to evaporation treatment to form an oil-water mixture; and the oil-water separation unit is used for separating an oil phase, phenol-containing sewage and gas-phase light hydrocarbon from the oil-water mixture. The system can wash pulverized coal carried in a gas phase, can also reduce the temperature of the gas phase at the top of the normal-pressure fractionating tower so as to reduce the load of an air cooler, prolong the service life of the air cooler, improve the separation efficiency and separation effect of the normal-pressure fractionating tower, and can also prevent excessive condensation of heavy components, thereby improving the balance of mass transfer and heat transfer in the tower and improving the separation efficiency and separation effect of the normal-pressure fractionating tower. And stable operation of the fractionation process and product quality are improved.

This invention discloses an enhanced separation device and method for washing, desolidification, and defoaming in a coal liquefaction system. The enhanced separation device includes a vertical tank with a gas outlet at the top and a solid-liquid outlet at the bottom. Inside the vertical tank, from top to bottom, are arranged a momentum fin unit, a micro-washing spray device, an inlet separator distributor, and a hydraulic nozzle. A material inlet is located on the side wall of the vertical tank corresponding to the inlet separator distributor. The momentum fin unit and the micro-washing spray device are located above the inlet separator distributor, and the hydraulic nozzle is obliquely positioned on the inner wall below the inlet separator distributor. The solid-liquid outlet is connected to a circulating pump via a pipeline. The device of this invention has a compact structure, simplifies the separation process, and relies solely on gravity settling and inertia to capture and separate fine particles, which is beneficial for the efficient and stable operation of the system.

The invention discloses agricultural coal-based mineral oil as well as a preparation method and application thereof, and belongs to the technical field of agricultural mineral oil, the preparation method of the agricultural coal-based mineral oil comprises the following steps: stirring No.1 oil at normal temperature, then adding No.2 oil, and stirring while keeping the temperature stable to obtain an oil product; the No.1 oil is prepared by indirectly liquefying coal; the No.2 oil is prepared by coal liquefaction and hydrogenation; characterizing the oil product, and selecting an emulsifier according to a characterization result; and adding an emulsifier into the oil product, and stirring to obtain the coal-based agricultural mineral oil. The coal-based agricultural mineral oil prepared by the invention has the characteristics of low cost, good use effect and wide use range, in addition, the oil products adopted by the invention are extracted from nature, and the emulsifier is biodegradable, so that the coal-based agricultural mineral oil also has the characteristics of greenness and environmental protection.

The invention provides a hydrogenation reactor conical shell small section and flanging end integrated forge piece and a preparation method thereof, and relates to the technical field of petrochemical equipment manufacturing, the preparation method of the hydrogenation reactor conical shell small section and flanging end integrated forge piece comprises the following steps: taking a steel ingot, pre-drawing, pressing a jaw and cutting a water gap end by gas to obtain a first blank; upsetting the first blank, drawing and compacting the first blank by adopting wide anvil large reduction forging, and pressing a tail step on the first blank to obtain a second blank; the second blank is placed in an upsetting leakage disc to be subjected to local upsetting, an upper flat hammer head and an electric rotary table are matched with each other to conduct one-way rotary open-edge forging on the second blank, the outer contour of the second blank gradually forms a stepped cone from a cylindrical shape, and a third blank is obtained; and a blind hole is punched in the center of the surface of the side, away from the upsetting leakage disc, of the third blank, demolding and material taking are conducted, the stepped cone of the third blank is forged to the conical surface, and the coal liquefaction hydrogenation reactor conical shell small section and flanging end integrated forge piece is obtained.

This invention relates to a direct coal liquefaction system and a method for direct coal liquefaction. The direct coal liquefaction system includes: a first liquefaction reactor having a raw material inlet and a first product outlet; a second liquefaction reactor having a circulating material inlet and a second product outlet; a feed inlet of a high-temperature, high-pressure separator connected to the first product outlet of the first liquefaction reactor and the second product outlet of the second liquefaction reactor; a feed inlet of a first material conveying device connected to the crude oil outlet of the direct coal liquefaction reactor of the high-temperature, high-pressure separator, and a discharge outlet of the first material conveying device connected to the circulating material inlet of the second liquefaction reactor; a feed inlet of a distillation column connected to the crude oil outlet of the direct coal liquefaction reactor of the high-temperature, high-pressure separator; and a feed inlet of a cold high-pressure separator connected to the light component outlet of the high-temperature, high-pressure separator. Based on the direct coal liquefaction system of this invention, the problems of low processing capacity and low conversion rate of direct coal liquefaction reactors in the prior art are solved.

The application discloses a method for stopping work and withdrawing alkali liquor of a coal direct liquefaction device, and the system comprises a tank area alkali liquor tank, a coal liquefaction device alkali liquor buffer tank, a reaction heating furnace, a first reactor, a second reactor, a high-temperature and high-pressure separator, an alkali liquor discharge buffer tank, a foam cyclone separator and a defoaming device; the alkali liquor is discharged to the coal liquefaction device alkali liquor discharge buffer tank for buffering, steam removal and defoaming, and then is pressurized and transported to the tank area alkali liquor tank for storage through a coal liquefaction device alkali liquor delivery pump, so that the purpose of continuously and massively withdrawing alkali liquor of the coal direct liquefaction device during stopping work is achieved, the stopping work time of the enterprise is saved, and certain economic benefits are brought.

The application discloses a method for preparing jet fuel by mixing a direct coal liquefaction crude oil fraction with an indirect coal liquefaction crude oil fraction, hydrogenating and refining the mixture, and separating the mixture to obtain the jet fuel. The preparation method is simple, and the prepared jet fuel has good indexes.

The application relates to the technical field of wet electronic chemicals, and discloses a production method of high-purity activated carbon for preparing electronic-grade hydrogen peroxide, and the specific preparation process steps are as follows: step one: high-quality coal liquefied pitch is used as an extraction agent, 1000 kg of high-quality coal liquefied pitch is added into 2000 kg of refined naphthalene, 150 kg of anhydrous aluminum chloride is further added, and stirring reaction is carried out under oil bath at 180 DEG C for 120 min; step two: solid-liquid separation is realized by using a horizontal solid-liquid centrifuge, and the solid phase is discarded, more than 90% of the anhydrous aluminum chloride is removed, the ash content of the activated carbon is less than 0.3%, and the quality is stable; in the primary treatment of preparing the electronic-grade hydrogen peroxide, more than 99% of organic impurities, more than 95% of inorganic impurities and the like in industrial hydrogen peroxide can be removed, the organic impurities are aromatic hydrocarbons, octanol, tri-octyl phosphate, anthraquinone compounds and phenols, the inorganic impurities are calcium, sodium, potassium, iron, aluminum and silicon, the adsorption capacity of the activated carbon does not obviously decrease after being regenerated for 5 times, and the use cost of customers is greatly reduced.

The present application provides a method for recovering iron-based catalyst from coal liquefaction residue, which comprises the following steps: crushing the coal liquefaction residue, adding a solvent for dissolution, and performing solid-liquid separation, drying and crushing to obtain a solvent-insoluble powder; then mixing the powder with water and a demulsifier, adding an acid solution and stirring to react, performing solid-liquid separation on the reaction product to obtain an active metal solution; adding an oxygen source and an alkali source to the active metal solution to perform an oxidation reaction, and performing solid-liquid separation on the reaction product to obtain a nanoscale iron-based catalyst. The present application realizes the recovery, regeneration and high-value recycling of the iron-based catalyst used in the coal and heavy oil liquefaction process, which not only can reduce the discharge of industrial waste and environmental pollution, but also can avoid the waste of resources, and can also reduce the cost of purchasing catalyst in the coal-based raw material liquefaction process, and has high environmental value and economic value.

The invention belongs to the technical field of mixed explosive preparation, relates to a preparation method of special coal-based synthetic oil for mixed explosives, and belongs to the technical field of coal-based liquid fuel and explosive auxiliary materials. According to the method, the coal-based synthetic oil with proper viscosity, high flash point, good low-temperature fluidity, excellent oxidation stability and good compatibility with ammonium nitrate is prepared through specific coal liquefaction, hydrofining, isomerization and component blending processes. The product can safely and efficiently replace traditional diesel oil to be applied to on-site mixed loading explosives, has the characteristics of controllable performance, controllable cost and high adaptability, and can effectively solve the problems of property fluctuation, potential safety hazards, poor environmental adaptability and the like when the traditional diesel oil is used as a fuel phase of the mixed loading explosives.

The invention discloses a direct coal liquefaction residue pyrolysis viscosity reduction method based on an inhibition-cracking-regulation triple synergistic system, and belongs to the technical field of coal chemical industry. The method comprises the following steps: firstly, carrying out swelling treatment on the direct coal liquefaction residues, adding a modifier into the direct coal liquefaction residues, and carrying out front-end prevention by using the modifier to inhibit the formation of a macromolecular network; adding a nano-scale transition metal catalyst, and uniformly dispersing the nano-scale transition metal catalyst in the modified direct coal liquefaction residues to obtain a sample I, so as to achieve the purpose of catalytic cracking of heavy components at the middle end; finally, diphenyl disulfide is introduced into the first sample, the diphenyl disulfide is automatically decomposed into a free radical terminator in a viscosity peak temperature window, and a free radical polycondensation path causing viscosity soaring and coking is actively intervened and cut off from the molecular level, so that the viscosity is remarkably reduced, and meanwhile, the light oil yield is synchronously increased. According to the method, the problem of viscosity control in the pyrolysis process of the direct coal liquefaction residues can be fundamentally solved, and meanwhile, high-efficiency recovery of high-added-value liquid products is realized.

The invention provides a method for separating oxygen-containing compounds in direct coal liquefaction light oil, which comprises the following steps of: activating a solid-phase extraction column by using a solid-phase extraction column which takes high-purity chromatographic grade silica gel as a stationary phase and adopting a first eluent to obtain an activated solid-phase extraction column, adding the direct coal liquefaction light oil into the activated solid-phase extraction column, and separating the oxygen-containing compounds in the direct coal liquefaction light oil. Adsorbing the direct coal liquefaction light oil to the activated solid-phase extraction column to obtain a solid-phase extraction column to be eluted; washing the solid-phase extraction column to be eluted with a second eluent to obtain a non-oxygen component and an oxygen-containing solid-phase extraction column, and washing the oxygen-containing solid-phase extraction column with a third eluent to obtain an oxygen-containing compound. The method can effectively enrich the oxygen-containing compounds in the coal liquefaction light oil, meets the requirements of subsequent analysis of the oxygen-containing compounds in the coal liquefaction oil middle fraction on the sample concentration and recovery rate, and has the advantages of small sample dosage, short treatment time, small eluent dosage, low impurity content of the oxygen-containing compounds in the eluent, high recovery rate of the oxygen-containing compounds and the like.

The invention provides an asphalt carbon-based oxidase-like nano material and a preparation method and application thereof.In the preparation method of the asphalt carbon-based oxidase-like nano material, starting from modification of a coal liquefaction asphalt base material, the asphalt carbon-based oxidase-like nano material is prepared through a series of links of coal liquefaction asphalt activation, metal ion loading, nitrogen doping, heat treatment and the like. And the asphalt carbon-based oxidase-like nano material with high specific surface area, rich porous structure, stable metal active sites and optimized electron distribution is gradually constructed. Through the elaborately designed steps, the material can efficiently catalyze oxidation of a chromogenic substrate without participation of hydrogen peroxide, visual detection of the antioxidant is achieved, and meanwhile it is ensured that the detection method has the remarkable advantages of being low in cost, easy and convenient to operate, high in sensitivity and wide in applicability; and powerful support is provided for technical innovation in the fields of food safety and health monitoring.

A method for separating and purifying monocyclic aromatic hydrocarbons from direct coal liquefaction oil is provided. The method is as follows: (1) performing fine fractionation and component analysis on the direct coal liquefaction oil, to determine a highest fraction of monocyclic aromatic hydrocarbons; (2) Removing light alkanes and cycloalkanes from the selected fraction by column chromatography; (3) separating toluene, monocyclic aromatic hydrocarbon mixtures and high-carbon alkanes through atmospheric and vacuum distillation column; (4) purifying ethylbenzene from a mixture of monocyclic aromatic hydrocarbons through extractive distillation column and (5) purifying p-xylene through solvent recovery column The separation method may fully utilize the compositional characteristics of direct coal liquefaction oil, to obtain two to three high-purity monomers of monocyclic aromatic hydrocarbons in a single processing step, without introducing additional chemical reaction steps, thereby demonstrating significant economic and environmental benefits.

The present invention relates to the field of coal chemical industry, particularly to a coal-based clean gasoline preparation method, which comprises: mixing a coal direct liquefaction fraction and a coal indirect liquefaction fraction, sequentially carrying out a hydrofining reaction and a hydrocracking reaction, and carrying out oil-gas separation on the hydrocracking reaction product to obtain hydrogen and a mixed oil product, fractionating the mixed oil product, and taking fractions with an initial boiling point of 40-55 DEG C and a final boiling point of 155-175 DEG C to obtain the coal-based clean gasoline, wherein the mass ratio of the direct coal liquefaction fraction to the indirect coal liquefaction fraction is (0.3-3.2): 1, the initial boiling point of the direct coal liquefaction fraction is 30-50 DEG C, the final boiling point of the direct coal liquefaction fraction is 250-270 DEG C, the initial boiling point of the indirect coal liquefaction fraction is 30-45 DEG C, and the final boiling point of the indirect coal liquefaction fraction is 220-240 DEG C. The qualified finished gasoline is prepared by coupling direct coal liquefaction and indirect coal liquefaction processing technologies, and the investment and production energy consumption are reduced.

The invention relates to the technical field of preparation of naphthenic oil, and discloses naphthenic rubber filling oil and a preparation method thereof. The method comprises the following steps: (1) in the presence of a non-noble metal hydrogenation catalyst, carrying out first hydrofining on the direct coal liquefaction oil, and then fractionating the obtained product to obtain a fraction A with the distillation range of more than 350 DEG C; (2) in the presence of a hydroisomerization catalyst, carrying out hydroisomerization on the indirect coal liquefaction oil, and then fractionating the obtained product to obtain a fraction B with the distillation range of more than 370 DEG C; and (3) mixing the fraction A and the fraction B, and carrying out second hydrofining on the obtained mixture in the presence of a noble metal hydrogenation catalyst. The prepared naphthenic rubber filling oil has the characteristics of low pour point and low aromatic hydrocarbon content. And the method has the advantages of small hydrofining load, high yield, abundant raw materials and low cost, highly meets the requirements of large-scale industrial production, and shows significant economic value and wide industrial application prospects.

The invention belongs to the technical field of carbon materials, and particularly relates to coal-based coated asphalt as well as a preparation method and application thereof. The coal-based coated asphalt comprises the following raw materials in parts by weight: 100 parts of graphite, 8-30 parts of coal liquefied asphalt and 2-6 parts of a dispersing agent. The coal-based coated asphalt has the beneficial effects that the coal-based coated asphalt takes the coal liquefied asphalt as a carbon precursor, and the coated asphalt composite material is obtained by carbonizing and crushing through a liquid-phase coating method, so that the problems of too low theoretical capacity, long-term charge-discharge cycle life attenuation and the like of a lithium ion battery negative electrode material can be improved, and the service life of the lithium ion battery negative electrode material is prolonged. Therefore, the application range of the material in the fields of electrochemical energy storage and catalysis is widened. When the coal-based coated asphalt is applied to the negative electrode of the lithium ion battery, excellent rate capability and long cycle stability are shown, and the coal-based coated asphalt is suitable for high-energy-density and rapid charging and discharging scenes.

Relating to the technical field of road building materials, the invention discloses a coal liquefaction modified asphalt, which comprises 70%-90% of coal liquefaction asphalt, 10%-15% of a modifier, 3%-8% of a collapsing agent, and 2%-4% of a stabilizer. The coal liquefaction modified asphalt product with excellent performance and regular shape is successfully prepared by performing systematic compound modification and granulation treatment on the coal liquefaction asphalt. The high and low temperature performance, the adhesiveness and the construction applicability are obviously improved, and the modified asphalt can be widely applied to road asphalt and waterproof materials; meanwhile, the product is converted into a regular particle form, so that the convenience of storage, transportation and use is greatly improved; according to the technology, high-added-value resource utilization of the coal liquefied asphalt is effectively achieved, remarkable energy-saving, consumption-reducing and environment-friendly benefits are embodied, the overall technology has the comprehensive advantages of being high in performance, high in added value, green and low in carbon, and a new feasible way is provided for efficient, clean and resource utilization of the coal chemical industry solid waste.