468 results about "Coal tar product" patented technology

The utility model belongs to the technical field of coal tar chemical industry, and particularly discloses a coal tar raw material layering dehydration device which comprises a raw material tank and a base, the lower end of the raw material tank is fixedly connected with the base, a feeding port is formed in the top of the raw material tank, and the outer side of the raw material tank is sleeved with a steam heat exchange sleeve. A water layer drain pipe is fixedly connected to the upper side of the raw material tank, an oil layer drain pipe is fixedly connected to the lower side of the raw material tank, a mixed drain pipe is fixedly connected between the water layer drain pipe and the oil layer drain pipe, the other end of the mixed drain pipe is fixedly connected with an electromagnetic three-way valve, and a liquid density sensor is fixedly connected to the inner wall of the raw material tank at the position of the mixed drain pipe. According to the utility model, the three liquid discharge pipes with different height positions are arranged, the liquid density sensor is arranged at the input end of the mixed liquid discharge pipe, and the controller is linked with the electromagnetic three-way valve at the output end of the mixed liquid discharge pipe, so that the automatic distinguishing and confirmation of an oil-water separation end point are realized, and the accuracy of oil-water separation is improved.

The invention discloses a low-temperature methanol washing RTO tail gas treatment device adopting a self-circulation air cooling double-valve-plate butterfly valve, and relates to the technical field of waste gas treatment. By arranging the condensation impurity removal mechanism, when coal waste gas passes through one condensation assembly, low-temperature tail gas cleaned by the low-temperature methanol washing mechanism can flow through a plurality of heat exchange pipes in the condensation assembly at the same time, so that the temperature of the outer walls of the heat exchange pipes is rapidly reduced to be below zero DEG C; coal tar gas and water vapor flowing through the low-temperature heat exchange pipe can be quickly cooled and solidified after being in contact with the outer wall of the low-temperature heat exchange pipe, so that the effect of separating the coal tar gas and the water vapor from the tail gas is achieved; a cold source which cannot be utilized and can influence subsequent RTO furnace treatment in the part of tail gas is ingeniously used for separating energy of coal tar and water vapor in the waste gas, a refrigerating device does not need to be independently arranged in the cooling and condensing process of the coal tar and the water vapor, and the purposes of energy conservation and emission reduction are achieved.

The invention belongs to the technical field of capacitor carbon preparation, and particularly relates to coal tar-based capacitor carbon and a preparation method and application thereof. Comprising the following steps: by taking coal tar as a carbon source, carrying out Friedel-Crafts reaction under the action of a cross-linking agent and a catalyst to obtain a tar-based cross-linked polymer; and carbonizing the tar-based cross-linked polymer at 600-900 DEG C in a protective gas atmosphere to obtain the coal tar-based capacitor carbon. The coal tar is used as a carbon source, the coal tar is subjected to Friedel-Crafts reaction to obtain the coal tar-based hypercrosslinked polymer, the hypercrosslinked polymer can be directly subjected to one-step high-temperature carbonization without any activating agent to obtain the high-performance coal tar-based capacitor carbon, the method is simple, the cost is low, the carbon yield is high, and the method is suitable for industrial production. The prepared capacitor carbon has a high specific surface area, abundant micropores and a disordered structure, is applied to a supercapacitor as an electrode material, and shows excellent electrochemical performance and stability.

The invention discloses a coal tar hydrogenation catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and an active metal component, wherein the carrier is a gallium modified silicon-aluminum carrier; in the gallium modified silicon-aluminum carrier, based on the mass of the gallium modified silicon-aluminum carrier, the mass content of gallium oxide is 2.0%-5.0%, the mass content of silicon dioxide is 20.0%-60.0%, and the mass content of aluminum oxide is 35.0%-78.0%; the active metal component comprises Mo and a group VIII metal element; the Mo comprises + 5 valence Mo; the group VIII metal element exists in the catalyst in the form of metal phosphide. The catalyst has high hydrogenation activity, appropriate cracking activity and good stability, and effectively improves the quality and yield of coal tar hydrogenation product oil.

The utility model relates to the technical field of coal tar processing equipment, and discloses an oil-water separator for coal tar processing, which comprises a separation tank, the feeding mechanism is arranged at the upper end of the separation tank; the discharging mechanism is arranged at the lower end of the separation tank, the separation tank comprises a tank body, and an oil outlet is formed in one end of the inner side wall of the tank body. According to the oil-water separation tank, the auxiliary water and oil mixture mixing and layering structure is arranged, namely, the spiral flow guide cover is arranged at the top of the tank body and matched with the feeding end, so that a water and oil mixture entering the tank body and a chemical reagent capable of promoting oil-water separation can be discharged after being spirally guided by the spiral flow guide cover, and a stirring mechanism at the bottom of the tank body is matched; according to the oil-water separator, mixing of a chemical reagent and a water-oil mixture can be promoted, rotation of the stirring paddle is stopped after mixing, the water-oil mixture entering the tank body can be rapidly mixed and layered, heavy water in the water-oil mixture can rapidly sink to the bottom, light oil in the water-oil mixture can rapidly float on the water-oil mixture, and therefore rapid oil-water separation is achieved.

The invention belongs to the technical field of lithium ion battery negative electrode materials and coated asphalt, and discloses a preparation method and application of a coating material easy to graphitize. The preparation method comprises the following steps: by taking one or more than two of petroleum residual oil, ethylene tar, medium and low temperature coal tar, coal pitch, petroleum pitch and maltha as raw materials, adding a blending solvent and a catalyst to obtain a blending raw material; the easily-graphitized coating material with relatively low interlayer spacing after carbonization is obtained by sequentially carrying out blending solvent compounding, boron doping and pressurized polymerization or sequentially carrying out blending solvent compounding, boron doping, pressurized polymerization, oxidation crosslinking and reduced pressure distillation / molecular distillation processes. The graphitization performance of the asphalt material is remarkably improved through boron doping, so that the asphalt material can form an ordered carbon layer structure at 1200 DEG C, carbonization shrinkage and microcrack generation are inhibited, and the compactness and uniformity of a coating layer are improved. The obtained coating material is suitable for the negative electrode of the lithium ion battery, and the first charge reversible capacity, the cycle stability and the rate capability of the battery can be improved.

A production method of high-structure carbon black based on petroleum-based composite raw oil comprises the following steps: S1, performing fraction cutting on the petroleum-based composite raw oil to obtain crude carbon black raw oil; s2, carrying out solvent extraction on the crude carbon black raw oil to obtain aromatic-rich carbon black raw oil; and S3, vaporizing and cracking the aromatic-rich carbon black raw oil to generate the high-structure carbon black. The method for producing the high-structure carbon black based on the petroleum-based composite raw material oil is different from the domestic existing production process of coal tar and anthracene oil, and the structure degree of the carbon black product can be improved by pretreating the petroleum residual oil and the tail oil, so that the production of the high-structure carbon black product is realized, the domestic raw material source of the high-structure carbon black is broadened, and the production cost of the high-structure carbon black is reduced. And the competitiveness of the product is improved.

The invention provides a prebaked anode with high compressive strength. The prebaked anode comprises the following raw materials: 68-85 parts by mass of calcined petroleum coke particles; 12-25 parts by mass of a modified coal pitch binder, wherein the softening point of the modified coal pitch binder is 105-115 DEG C; and 0.3-0.8 part by mass of a whisker reinforcing agent. The production process comprises the following steps: calcining, crushing and grading, modifying fine powder, preparing a binder, mixing and kneading, forming and roasting. The prebaked anode has the advantages that through multi-stage material collaboration and process innovation, under the condition that an existing production line is not changed at all, the core contradictions that the prebaked anode is insufficient in strength, poor in conductivity and poor in high-temperature stability are synchronously solved.

The invention discloses a method for efficiently extracting phenol from coal tar and primarily separating crude phenol oil, and relates to the technical field of chemical separation. Carrying out multi-stage cross-flow or counter-flow extraction on the extracting agent and the coal tar to obtain a raffinate phase and a high-concentration extraction phase; and mixing the raffinate with condensate at the top of the regeneration device and supplemented fresh water, and recovering residual organic amine through a reverse extraction device to obtain a dephenolized oil product and backwashing water. Mixing and diluting the extract phase with backwashing water, and standing for phase splitting to obtain a high-grade crude phenol oil phase and a low-concentration extract phase; the low-concentration extraction phase absorbs CO2 in the industrial tail gas for acidification to obtain a low-grade crude phenol oil phase and an amine salt aqueous solution; and desorbing the amine salt aqueous solution to obtain a regenerated extraction agent (circularly used for extraction), tower top condensate (circularly used for reverse extraction) and water-containing industrial-grade CO2 gas (recycled or sealed after drying). According to the method, high-efficiency extraction of the phenolic compounds in the coal tar and primary separation of crude carbolic oil are realized by utilizing the extraction performance differences of extraction capacities, selectivity and the like of the extraction agents with different concentrations on the phenolic compounds, and the production economy is improved.

The invention belongs to the technical field of carbon materials, and relates to a coal tar-based nitrogen-sulfur co-doped porous carbon material and a preparation method thereof.The coal tar-based nitrogen-sulfur co-doped porous carbon material is prepared from waste coal tar as a carbon source, animal hair as a carbon source, a nitrogen source and a sulfur source, shrimp and crab shells as a nitrogen source and a template agent and strong base as an activating agent through hydrothermal carbonization and high-temperature activation. The carbon material with high specific surface area and adjustable pore structure is obtained, and contains a certain amount of heteroatom nitrogen and sulfur. The shrimp and crab shell particles are used as a template agent to provide internal initial pores; in the hydrothermal pre-carbonization process, a high-temperature alkali solution can quickly dissolve hair to form polypeptide substances, so that the polypeptide substances in a pyrolysis product are uniformly mixed with tar, alkali, crustacean particles and the like, and uniform co-doping of nitrogen and sulfur is facilitated. The problems of low carbon production rate, serious graphitization, low porosity, difficulty in directional regulation and control of a pore structure and low content of heteroatoms in tar in the prior art are solved, and the specific surface area of the porous carbon material is increased.

The invention provides a temperature accurate control and flow state optimization method for replacing dimethyl disulfide with sulfur in a coal tar hydrogenation process, which comprises the following steps: after acquiring a blockage risk distribution diagram, deploying a flow sensor and a pressure sensor at key nodes of a pipeline in combination with real-time monitoring capability, and collecting dynamic data of a sulfur flow state; flow stability parameters are obtained; according to the fluctuation amplitude, adjusted sulfur flow state data are obtained, the flow velocity and viscosity change of sulfur in the pipeline are calculated through fluid mechanics simulation, and the flow state optimization degree is determined; after a process suitability evaluation result is obtained, the operation cost and the economic benefit improvement range of the sulfur substitution scheme are calculated in combination with a cost accounting model, and the cost control effect is judged by comparing the reference cost of dimethyl disulfide; through a cost control effect, a time sequence prediction algorithm is adopted to analyze sustainability of temperature control and flow state optimization in long-term operation, and a comprehensive optimization scheme of production process stability and economy is obtained.

The invention discloses a coal tar pretreatment method. According to the method, a magnetic filtering system is included, the magnetic filtering system comprises a magnetic filter, the magnetic filter comprises a magnetic filtering cylinder, multiple layers of magnetic gathering media are arranged in the magnetic filtering cylinder, a magnetic field generating device is arranged outside the magnetic filtering cylinder, and the magnetic field generating device enables a high-gradient magnetic field to be formed in the magnetic filtering cylinder. The method comprises the following steps: heating a coal tar raw material, mixing the heated coal tar raw material with water, a demetallization agent, a flocculant and a magnetic seed, carrying out magnetic filtration, and sequentially carrying out salt leaching, oil-water separation and deep dehydration to obtain refined coal tar. The pretreatment method can effectively remove solid slag, water, salt and metal in the coal tar, and is simple in process flow and low in cost.

The invention discloses a method for improving the stability of converter steel slag by using red mud, which comprises the following steps: adding waste coal tar into the red mud generated in the electrolytic aluminum industry, pressing into pellets, adding the pellets into converter liquid-state steel slag in the converter deslagging process link, and reacting Al2O3 and SiO2 in the red mud with f-CaO and f-MgO3CaO.SiO2 in the converter steel slag to obtain the stability of the converter steel slag. And meanwhile, the waste coal tar reacts with Fe2O3 in the red mud and the steel slag to recover the iron element in the red mud, so that the recovery efficiency of the iron element in the steel slag is improved, and the strength of cross innovation of technologies in different fields is manifested.

The present invention discloses a method for extracting phenolic compounds from coal tar in stages, which relates to the technical field of chemical separation. The method comprises the following steps: extractant II is mixed with coal tar through an extraction device to obtain coal tar I and extraction phase II; the extraction phase II is sequentially subjected to deep acidification with CO2 and oil-water separation to obtain a low-grade crude phenol oil product and aqueous phase II; the aqueous phase II enters a regeneration device for regeneration by heating, the obtained CO2 gas is recycled to the deep acidification device, and the regenerated extractant is mixed with supplemented fresh extractant to serve as extractant I. Extractant I is mixed with coal tar I through an extraction device to obtain extraction phase I and a dephenolized oil product; the extraction phase I is subjected to acidification and oil-water separation to obtain extractant II and a high-grade crude phenol oil. The present invention utilizes the selectivity difference of different extractants for different types of phenolic compounds in coal tar to realize the efficient extraction of phenolic compounds in coal tar and the preliminary separation of crude phenol oil, and significantly reduces the cost of subsequent treatment of dephenolized oil and crude phenol oil.

The invention belongs to the technical field of conductive material preparation, and relates to a refined asphalt-based porous carbon double-layer orderly coated conductive material and a preparation method and application thereof, and the preparation method comprises the following steps: S1, cutting medium and low temperature coal tar to obtain fraction section asphalt of 350-550 DEG C; s2, refining the fraction section asphalt, and blending with polyacrylonitrile fibers (PAN) to obtain a compound material; pre-oxidizing the compound material at low temperature, mixing with an activating agent, grinding, drying, activating at high temperature, cooling and washing to obtain refined asphalt porous carbon; s3, coating the refined asphalt porous carbon with silicone oil through an impregnation method, and curing to obtain a single-coating coating material; and S4, dissolving the single-coating coating material in tetrahydrofuran, then adding carbolic oil-gel to perform double-layer coating, and performing secondary curing treatment to obtain the conductive material. According to the invention, medium and low temperature coal tar is used as a raw material, and the cycle stability and electrochemical performance of the conductive material are improved and the processing cost is reduced through methods of fraction cutting, mixed carbonization and double-layer coating.

The invention relates to the technical field of sodium ion battery negative electrode materials, in particular to a method for preparing hard carbon from medium-temperature coal tar-based pitch, which comprises the following steps: (S1) hydrogenating the medium-temperature coal tar-based pitch and a hydrogen donor solvent at high temperature and high pressure to obtain hydrogenated pitch; (S2) mixing the hydrogenated asphalt with a Lewis acid catalyst, and oxidizing in an oxygen-containing atmosphere to obtain first oxidized asphalt; (S3) uniformly mixing the first oxidized asphalt and a modifier, and carrying out secondary oxidation crosslinking to obtain second oxidized asphalt; and (S4) uniformly mixing the second oxidized asphalt and a pore-forming agent, and carrying out heat treatment in an inert atmosphere to obtain the product hard carbon material. The hard carbon material prepared by the method disclosed by the invention is benefited from a specific preparation process, shows relatively high specific capacity and first coulombic efficiency, and also has excellent rate capability. The preparation method is simple, low in cost and easy for large-scale production, and lays a foundation for large-scale production of the sodium-ion battery negative electrode material.

The invention provides an oil, gas, coke and electricity coupling co-production process of low-rank coal, and relates to the technical field of comprehensive utilization of coal, the oil, gas, coke and electricity coupling co-production process comprises the following steps: raw material pretreatment: taking power coal or low-rank coal as a raw material, drying and crushing, and inputting into a dry distillation device; destructive distillation and pyrolysis: pyrolyzing the raw materials by a destructive distillation device to produce raw gas and high-temperature red coke; gas purification and tar separation: purifying and separating the raw gas to obtain chemical products such as coal tar and purified gas; the purified coal gas is divided into two paths, one path flows back to the dry distillation device to serve as a combustion heating heat source, and the other path serves as a product to be sold or used for producing chemical products such as methanol and LNG; directly combusting the red coke: directly inputting the high-temperature red coke into a boiler device for combustion without a coke quenching process; the high-temperature red coke can be separated into coke particles and coke foam by the screening device before entering the boiler device, the coke particles are sold as products, and the coke foam is input into the boiler device for combustion; the low-rank coal is effectively and fully utilized through the co-production process for steam and electric power production.

The invention provides a low-rank coal pyrolysis system and a control method thereof. The low-rank coal pyrolysis system comprises a through-flow type rotary dryer, a pyrolysis furnace, a dust remover, a waste heat recovery device, a venturi tower and a purification recovery device, and a dried coal outlet of the through-flow type rotary dryer is connected with a product inlet of the pyrolysis furnace; a raw gas outlet of the pyrolyzing furnace is connected with a gas inlet of the venturi tower through the dust remover and the waste heat recovery device in sequence, a flue gas outlet of the pyrolyzing furnace is communicated with a flue gas recovery port of the cross-flow rotary dryer to recover flue gas to dry raw material coal, and a tower bottom outlet of the venturi tower is connected with the ammonia water purification and recovery device to recover coal tar; and a coal gas outlet of the venturi tower is communicated with the coal gas purification and recovery device. According to the low-rank coal pyrolysis system provided by the invention, on one hand, waste heat of raw gas can be recycled, and on the other hand, raw materials can be conveniently dried, so that the pyrolysis efficiency is improved.

The invention belongs to the technical field of deep processing of coal tar, and particularly relates to a preparation method of high-purity carbazole. The rectification process of the method mainly comprises the following steps: carrying out two-stage rectification on anthracene carbol oil, adopting a negative pressure rectification mode in the first-stage rectification, extracting a primary light component containing carbazole from the tower top, then carrying out two-stage rectification on the primary light component, and finally extracting high-purity carbazole from a side line. The purity of carbazole prepared through the rectification method can reach 99.5% or above, and the yield is high and reaches 60% or above.

The present invention discloses a coal tar suspension bed coupled with a fixed bed hydrocracking process and device, which includes a catalyst storage tank connected to a catalyst mixing tank, and the catalyst mixing tank is connected to a catalyst feed pump; it also includes a coal tar buffer tank, the coal tar buffer tank is connected to a slurry feed pump, the slurry feed pump is connected to a first heating furnace, the first heating furnace is connected to a hydrogen heating furnace, and the hydrogen heating furnace is connected to a first suspension bed reactor; the coal tar buffer tank is also connected to a first vacuum tower, the first vacuum tower is connected to a second heating furnace, the second heating furnace is connected to a hot low-pressure separator, the first suspension bed reactor is connected to a second suspension bed reactor, the outlet of the second suspension bed reactor is connected to a hot high-pressure separator, the hot high-pressure separator is connected to a cyclone separator and a hot medium-pressure separator, and the cyclone separator is connected to a fixed bed reactor. The process flow of the present invention is short, with high conversion rate and light oil yield, low energy consumption, and the reactor and the feed mixing system are not easily blocked, and the vacuum system is not easily worn.

The utility model provides rapid enrichment equipment for light hydrocarbon oil, medium hydrocarbon oil and crude phenol in medium and low temperature coal tar, which adopts five solvent storage tanks to store and take recovered solvents (acetone, carbon disulfide, petroleum ether, methanol and acetonitrile) in each step so as to be recycled in cycles; carrying out deliming treatment on the medium-low temperature coal tar by using an acetone / carbon disulfide mixed solvent; petroleum ether and methanol, petroleum ether and acetonitrile, and methanol and carbon disulfide are used for carrying out step-by-step double-solvent layered extraction on the de-ashed tar. The device disclosed by the utility model realizes rapid enrichment of target components in medium and low temperature coal tar, provides extract oil which is simple in composition and easy to process for subsequent secondary upgrading, and solves the problems of high energy consumption, difficulty in large-scale commercialization and the like in the prior art.

The invention discloses an anti-rutting asphalt mixture, a preparation method and application of the anti-rutting asphalt mixture in expressway single-lane micro-surfacing construction, and belongs to the technical field of asphalt concrete.The mixture comprises aggregate, inorganic filler, modified asphalt, epoxy resin and an epoxy resin curing agent. The modified asphalt is prepared by mixing and processing coal tar, petroleum asphalt, a solubilizer, rubber powder, a thermoplastic elastomer, an organosilicon compound and sulfur powder. Compared with the prior art, the dynamic stability of the mixture under the high-temperature condition is remarkably improved, track deformation generated by vehicle running can be effectively resisted, the service life of a pavement is prolonged, and the maintenance cost is reduced. Meanwhile, the splitting strength ratio of the mixture under the freezing and thawing cycle condition is greatly improved, excellent water damage resistance is shown, and the stability and durability of the pavement in a humid environment are ensured.

The invention relates to the technical field of hard carbon material manufacturing, in particular to a method for preparing a hard carbon negative electrode material from medium and low temperature coal tar based pitch, which comprises the following steps: (S1) uniformly mixing the medium and low temperature coal tar based pitch and a cross-linking modifier, and carrying out heat treatment to obtain cross-linked modified pitch; the cross-linking modifier is a compound of a copolymer and a compound A; (S2) mixing the cross-linked modified asphalt with sulfur-containing polyaldehyde, and oxidizing in an oxygen-containing atmosphere to obtain first oxidized asphalt; (S3) uniformly mixing the first oxidized asphalt and a modifier, and carrying out secondary oxidation crosslinking to obtain second oxidized asphalt; and (S4) uniformly mixing the second oxidized asphalt and a pore-forming agent, and carrying out heat treatment in an inert atmosphere to obtain the product hard carbon material. The hard carbon material prepared by the invention has excellent electrochemical performance, is suitable for a negative electrode material of a sodium-ion battery, and remarkably improves the first effect and cycling stability.

The invention discloses a NiCo-LDH / porous carbon composite material with expanded interlayer spacing as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing coal pitch serving as a carbon source with potassium hydroxide, combusting in an inert gas atmosphere, and performing acid pickling, suction filtration and drying to obtain a coal pitch-based porous carbon material; the preparation method comprises the following steps: uniformly dispersing a certain amount of porous carbon material in a mixed solution of nickel nitrate hexahydrate, cobalt nitrate hexahydrate, polyvinylpyrrolidone (PVP) and ethylene diamine tetraacetic acid (EDTA-2Na), performing hydrothermal reaction, adding hydrazine hydrate (N2H4H2O), and performing hydrothermal reaction again to obtain the nickel-cobalt layered double hydroxide / porous carbon composite material (NiCo-LDH-PC) with expanded interlayer spacing. Compared with the prior art, the method has the advantages that the interlamellar spacing of NiCO-LDH is regulated and controlled, the interlamellar spacing is enlarged, and the NiCO-LDH has excellent electrochemical performance and cycling stability as an electrode material of a supercapacitor and a button cell.

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.

The application discloses a preparation method and application of a phenol oil-based phase separation phenolic aerogel, and belongs to the field of high-value utilization of coal tar. The preparation method of the phase separation phenolic aerogel comprises the following steps: taking melamine foam as a skeleton, phenol oil, phenols and aldehydes as raw materials, mixing different polar organic matters as solvents, and taking acid as a catalyst to perform a solvothermal reaction to obtain a phase separation phenolic organic gel; and vacuum drying is performed to obtain the phase separation phenolic aerogel. The phase separation phenolic aerogel with adjustable porosity and connectivity can be obtained by adjusting the polarity and ratio of the mixed solvents, and the aerogel can be used for solar-driven interfacial water evaporation. In the application, phenol oil is used to replace phenols to prepare the phenolic aerogel with high connectivity, the raw material cost is reduced, the utilization value of the phenol oil is improved, the operation is simple, complex freeze drying and template adjustment pores are not needed, and the application prospect of the phenol oil in solar-driven interfacial water evaporation is good.

The invention relates to the technical field of catalyst preparation, and particularly discloses a catalyst for efficient coal-based synthesis of dimethyl carbonate and a preparation method thereof.The catalyst comprises, by weight, 85%-88% of a coal-based activated carbon carrier, 7%-8% of copper oxide, 3%-4% of zinc oxide, 1%-2% of aluminum oxide and 1%-2% of rare earth oxide; the coal-based carbon material is used as the carrier, so that the thermal stability and the surface adsorption capacity of the catalyst are remarkably improved; after CeO2 is introduced, the redox cycle efficiency is improved, and the methanol conversion rate and DMC selectivity are enhanced; a pore structure is improved through a coal tar blending carbonization technology, and reactant molecule diffusion and product desorption are facilitated; the catalyst is stable in structure, long in continuous reaction time and good in renewability and industrial adaptability, organic functional groups in coal can be directionally reserved through multiple treatment means, high-density defect sites can be constructed, and the loading performance of the catalyst is enhanced.

The present invention relates to the technical field of wastewater treatment, and specifically provides a wastewater treatment device for deep processing of coal tar, including: four RO reverse osmosis membrane modules arranged successively from top to bottom and two water tanks. Both ends of the RO reverse osmosis membrane module are communicated with the two water tanks respectively, and an opening and closing adjustment mechanism is installed on the water tank. Through the cooperation of the screw rod, the rotating cylinder, the single-stop plugging group and the multi-stage adjustment group, the present invention can not only achieve separate control of the closing of the ports at both ends of each RO reverse osmosis membrane module, but also control the closing of the ports at both ends of two or three RO reverse osmosis membrane modules according to the change of demand, enabling the continuous treatment of wastewater, improving the efficiency of wastewater treatment and the operation flexibility of the wastewater treatment device during the cleaning of the RO reverse osmosis membrane module. When the treatment device is not in use, the multi-stage adjustment group can also simultaneously close the ports at both ends of the four RO reverse osmosis membrane modules, improving the flexibility and versatility of the overall treatment device in adjusting the use according to the flow rate of coal tar wastewater.

The utility model belongs to the technical field of coal tar hydrogenation process, and relates to a sealing gas conveying system for sealing a circulating hydrogen compressor, which comprises a conveying pipeline and heating equipment, the conveying pipeline is connected with the outlet end of the compressor and used for conveying sealing gas. The heating device is arranged on the conveying pipeline and used for heating the sealing gas. According to the utility model, the process gas at the outlet end of the compressor is heated through the additionally arranged heating equipment, so that the process gas can be conveniently heated to the required temperature to serve as sealing gas, the load of the compressor does not need to be increased, unnecessary energy consumption of the compressor is avoided, and in addition, in the actual operation process, the energy consumption is reduced. The load of the compressor can be reduced according to actual process requirements, so that the process gas temperature at the outlet end of the compressor is reduced, and energy conservation and consumption reduction of the compressor are realized.

A process for removing contaminants from coal-derived phenols is described. The process combines an extraction process with at least two adsorption zones containing adsorbents. Liquid-liquid and acid-base extraction processes may be used. The adsorbents may be clays and / or zeolites. The process may be used to reduce organic nitrogen and sulfur compounds to levels below 10 ppmw and produce a colorless product.