The invention relates to an extraction method of direct coal liquefaction residues and application of extracts. The extraction method comprises the following steps: a) adding coal liquefaction residue powder and a first extraction solvent to a stirred tank to undergo primary extraction; b) carrying out solid-liquid separation on the extracted mixture obtained in the step a), recovering the first extraction solvent from the obtained liquid in a solvent recovery unit and recycling the first extraction solvent, obtaining heavy liquefied oil after recovering the first solvent, carrying out moderate hydrogenation on the heavy liquefied oil and other recycled solvents in a coal liquefaction solvent hydrogenation unit and using the product as the recycled solvent in the coal liquefaction process; c) mixing solid obtained through solid-liquid separation of extracts obtained after primary extraction with a second extraction solvent to undergo secondary extraction; d) carrying out solid-liquid separation on the extracted mixture obtained after secondary extraction, obtaining asphaltic substances after recovering the second solvent from the obtained liquid in the solvent recovery unit and carrying out heat treatment on the asphaltic substances by heating and carbonizing to obtain mesophase asphalt and oils.

Extraction method of direct coal liquefaction residues and application of extracts

The invention discloses a preparation method of mesophase carbon microspheres from coal liquefaction residues serving as raw materials, which comprises the following steps of: firstly carrying out solvent extraction on the coal liquefaction residues, then carrying out a series of processing to obtain refined asphalt with different contents of quinoline insoluble substances, and carrying out thermal polycondensation reaction on the refined asphalt in the presence of a chemical auxiliary agent and a nucleating accelerator at the temperature of 380-450 DEG C, the pressure of 0-5 MPa and the stirring rotation speed of 40-500 r/min for 1-20 hours to obtain the mesophase microspheres. According to the invention, the chemical auxiliary agent and the nucleating accelerator can be added during theheat treatment process to improve the yield and narrow the particle size distribution of the mesophase carbon microbeads, and the mesophase carbon microspheres are prepared from the coal liquefactionresidues serving as the raw materials and have the advantages of low cost, simple preparation process, high yield (up to 35%), narrow particle size distribution, good sphericity, etc.

Preparation method of mesophase carbon microspheres from coal liquefaction residues

The invention discloses modified asphalt and a preparation method thereof The method comprises the following steps: S1, mixing high-temperature asphalt, heavy oil and crosslinking agent to form a first mixture, wherein the softening point of the high-temperature asphalt is 115-160 DEG C, the beta resin content is 5-15 wt%, and the ash content is no more than 05 wt%; S2, mixing the first mixture and a catalyst to form a second mixture; and S3, performing crosslinking polymerization on the second mixture at 120-200 DEG C to obtain the modified asphalt According to the invention, the heavy oil and crosslinking agent are added into the high-temperature asphalt used as a raw material, slow heating is performed to obtain molten asphalt, and then, crosslinking polymerization reaction is performed on the high-temperature asphalt under the action of the catalyst, thus obtaining the modified asphalt which meets the requirements of the market for medium-and-high-temperature asphalt and has reduced softening point and high beta resin content; and the modified asphalt has favorable binding property and can be used as medium-and-high-temperature binding agent asphalt and impregnated asphalt required in the market

Modified asphalt and preparation method thereof

The invention discloses a coal-based military fuel and a preparation method thereof. The method comprises the steps of: (1) carrying out distillation cutting on raw oil so as to obtain a light oil fraction and a heavy oil fraction; (2) uniformly mixing a catalyst, a vulcanizing agent and solvent oil so as to prepare catalyst-oil slurry, mixing the catalyst-oil slurry, the heavy oil fraction and circulating oil with the catalyst, carrying out hydrocracking, obtaining a liquid-solid mixture after a reaction product is subjected to separation, and obtaining light oil fraction after the liquid-solid mixture is subjected to separation; and (3) carrying out hydrofining or selective hydrofining on the light oil fraction obtained in the step (1) and the light oil fraction obtained in the step (2), and enabling the obtained oil to enter a fractionating tower for product fractionation after the obtained oil is subjected to cooling and gas-liquid separation, thereby obtaining the military fuel. According to the method, the scope of application is wide, the process flow is reasonable, the raw material utilization ratio is high, the varieties of products are multiple, and the operation is flexible, so that the method can be applied to the mass production of various special oils.

Coal-based military fuel and preparation method thereof

The invention provides intermediate phase asphalt and a preparation method thereof. The preparation method comprises the following steps that A, mixing coal liquefaction residuals with an extraction solvent, stirring, extracting, and carrying out centrifugal separation to form an extraction liquid; B, carrying out atmospheric or reduced pressure distillation on the extraction liquid to form an extraction refined substance; and C, carrying out a polymerization reaction on the extraction refined substance at constant 400-450 DEG C and at constant 0.1-3.0MPa in an inert gas atmosphere for 5-16 hours to form the intermediate phase asphalt. According to the preparation method, under the condition that no catalyst is added, the intermediate phase asphalt in a good streamline structure is prepared, and serves as a carbon precursor for further preparing various carbon materials; the flow of a whole technical process is relatively simple; operation is convenient and safe; utilization potential of asphalt substances in the coal liquefaction residuals is fully exerted; the application field of the coal liquefaction residuals is expanded; and the resource utilization ratio is increased.

Intermediate phase asphalt and preparation method thereof

Method for preparing mesophase asphalt by coal liquefaction residue

The invention relates to the field of coal chemical industry, and more specifically relates to a method of extracting phenolic compounds from coal liquefied oil or coal tar. The method comprises the following steps: 1) distilling coal liquefied oil or coal tar and cutting to obtain fractions at a temperature of 260 DEG C; 2) mixing an extractant with the obtained fractions and layering the extractant; 3) separating and collecting the extractant layer which contains phenolic compounds; 4) carrying out multistage back extraction on the phenolic compounds so as to obtain a stripping agent-phenol solution and an extractant; 5) separating the stripping agent-phenol solution by rectification, recovering the stripping agent for cyclic utilization, and carrying out separation to obtain crude phenols; 6) removing entrained neutral oil in phenolic compounds by water vapour so as to obtain crude phenol products. The method of extracting phenolic compounds from coal liquefied oil or coal tar provided in the invention avoids the usage of soda acid, exerts no influence on subsequent treating processes, and guarantees high recovery rate and purity of phenols.

Method of extracting phenolic compound from coal liquefied oil or coal tar

The invention relates to a bimetal or multi-metal high-dispersion composite coal tar hydrogenation catalyst and a preparation method thereof. The catalyst comprises molecular high-activity components of one or a plurality of mixtures of water-solubility salt compounds of metal from molybdenum, nickel, tungsten or cobalt, nanometer low-activity components gamma-FeOOH grains and micro or sub nanometer carrier pulverized coal, the activity components are uniformly and highly dispersed on the surfaces of the carrier pulverized coal, the catalyst is micro or sub nanometer fine powder and is high in activity, particles of the activity components are small and are highly uniformly dispersed on the surface of a carrier, the utilization quantity of the catalyst is low, cost is reduced, and the bimetal or multi-metal high-dispersion composite coal tar hydrogenation catalyst can be widely applied to coal tar hydrogenation or coal liquefaction.

Bimetal or multi-metal high-dispersion composite coal tar hydrogenation catalyst and preparation method thereof

The invention discloses a high-pressure high-temperature liquid viscosity measuring device and method. The measuring device comprises a high-pressure high-temperature system and a measuring system, wherein the measuring system comprises a driving motor, a torque sensor, a driving magnetic barrel, an induced magnetism barrel, a rotating shaft and a stirring paddle; one end of the torque sensor is connected with the driving motor, the other end of the torque sensor is connected with the driving magnetic barrel, and the driving magnetic barrel rotates along the torque sensor; the induced magnetism barrel is positioned in the driving magnetic barrel and can rotate along the driving magnetic barrel under the magnetic action; one end of the rotating shaft is connected with one end, which is far from the torque sensor, of the induced magnetism barrel, the other end of the rotating shaft is connected with the stirring paddle, and a part of the rotating shaft is positioned in the high-pressure high-temperature system; the stirring paddle is positioned in the high-pressure high-temperature system, and the stirring paddle comprises multiple blades which are symmetrically arranged around the rotating shaft. The measuring device provided by the invention can accurately detect the liquid viscosity under a high-pressure high-temperature condition.

Yan Bingfeng

Papers

Method for preparing mesophase asphalt by coal liquefaction residue

Method of extracting phenolic compound from coal liquefied oil or coal tar

Bimetal or multi-metal high-dispersion composite coal tar hydrogenation catalyst and preparation method thereof

Coal-based military fuel and preparation method thereof

High-pressure high-temperature liquid viscosity measuring device and method