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35 results about "Coal tar preparation" patented technology

Method for preparing carbon nanotubes by adopting coal tar

The invention discloses a method for preparing carbon nanotubes by adopting coal tar. The method comprises the following steps: 1, soaking ferroferric oxide powder in a SnCl2 solution to perform sensitization, and plating nickel on the surface of the ferroferric oxide powder by adopting physical deposition to obtain an iron-containing catalyst; 2, introducing a protective gas into a coal tar vaporizer to blow away and vaporize the coal tar, thereby obtaining a mixed gas of the coal tar and the protective gas after vaporization; 3, putting the iron-containing catalyst into a corundum boat, putting the corundum boat into a tubular furnace, introducing the mixed gas when the furnace temperature rises to 400-600 DEG C, applying an intermediate-frequency induction power source to the tubular furnace at the same time, stopping introducing the mixed gas and turning off the intermediate-frequency induction power source after 20-30 minutes, and cooling along with the furnace to obtain a semi-finished product; and 4, sieving the semi-finished product in water, and drying an oversize product to obtain the carbon nanotubes. According to the method disclosed by the invention, a coke coking byproduct namely the coal tar is adopted as a raw material for preparing the carbon nanotubes, and the average pipe diameter of the prepared carbon nanotubes is 28-60nm.
Owner:XIAN UNIV OF SCI & TECH

Process for preparing needle coke by utilizing coal tar

The invention belongs to the technical field of preparation of needle coke and specifically relates to a process for preparing needle coke by utilizing coal tar. The process comprises the following steps: 1, a mixing and settling unit, mixing the coal tar and the fraction lower than 210 DEG C, and performing heating, standing and settling; 2, a filtering unit, pressurizing and filtering the supernatant liquid so as to obtain filtrate; 3, a fractionation unit, fractionating the filtrate in a fractionating tower to obtain four fractions; 4, a hydrocracking unit, performing hydrocracking on the fraction of 210-230 DEG C to obtain hydrocracked fraction; 5, a 1# pressurized polycondensation unit, reacting the fraction of 230-300 DEG C in a 1# pressurized polycondensation device to obtain 1# polycondensate; 6, a 2# pressurized polycondensation unit, carrying out a reaction of the fraction of higher than 300 DEG C in a 2# pressurized polycondensation device to obtain 2# polycondensate; 7, a coking unit, coking the 1# polycondensate and 2# polycondensate to obtain green needle coke; 8, a calcination unit, performing high-temperature calcination on the green needle coke, thereby obtaining the finished needle coke. Therefore, comprehensive utilization of the coal tar is realized.
Owner:山西中科化美科技有限责任公司

Method for coal-tar-free preparation of desulfurization and denitrification activated carbon

PendingCN113401899AReduce Occupational Health HazardsLow priceCarbon compoundsActivated carbonAdhesive
The invention relates to preparation of activated carbon, in particular to a method for coal-tar-free preparation of desulfurization and denitrification activated carbon. The method comprises the following steps: 1) preparation of an adhesive solution: mixing sodium/calcium lignosulfonate with water, conducting standing in a water bath, and obtaining the adhesive solution after the sodium/calcium lignosulfonate is completely dissolved; and 2) preparation of desulfurization and denitrification activated carbon: mixing the adhesive solution obtained in the step 1) with pulverized coal and water in proportion to form coal paste, conducting molding by a granulator, conducting carbonizing and activating, conducting discharging, and conducting cooling and screening to obtain the desulfurization and denitrification activated carbon. The adhesive used in the invention is non-toxic and odorless, and can effectively reduce occupational health hazards to field operators. The adhesive is low in price and small in dosage, adhesive powder is dissolved in water to be prepared into a solution for use, and the preparation cost of the desulfurization and denitrification activated carbon is effectively reduced. In the using process of the adhesive, no organic matter volatilizes, and the problem of environmental pollution in the production process of desulfurization and denitrification activated carbon is solved.
Owner:SHANXI XINHUA CHEM

A method for preparing negative electrode material by dry distillation of coal tar at medium and low temperature

The invention provides a method for preparing a negative electrode material by using medium and low temperature dry distillation coal tar. The medium and low temperature coal tar is used as a raw material, and the negative electrode is controlled by adjusting the content of quinoline insoluble matter, carbonization conditions, and graphitization conditions in the negative electrode material precursor preparation raw material. The structure of the material is used to prepare the negative electrode material. Compared with the existing technology, the beneficial effects of the present invention are: 1) The negative electrode material prepared by the present invention has high charging and discharging efficiency of the battery for the first time, stable battery performance, excellent cycle performance, outstanding anti-attenuation ability, and a gram specific capacity of up to 360mAh above. 2) The process method of the present invention is simple and feasible, easy to realize industrial production, provides a new way for the deep processing of medium and low temperature dry distillation coal tar, and significantly improves the added value of medium and low temperature dry distillation coal tar. 3) Conform to the country's call for efficient use of energy and alleviate the energy shortage.
Owner:SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD

Method for preparing special asphalt by separating coal tar step by step

The invention relates to a method for preparing special asphalt from coal tar through progressive separation. The method comprises the following specific steps: proportionally adding a mixed solvent Ainto the coal tar, carrying out stirring, carrying out standing, and carrying out layering, so as to obtain an upper-layer mixed solution A; taking the upper-layer mixed solution A, carrying out filtering, and carrying out distilling to recover the mixed solvent A, so as to obtain a first-stage separated product of the coal tar; proportionally adding a mixed solvent B into the first-stage separated product of the coal tar, carrying out stirring, carrying out standing, and carrying out layering, so as to obtain an upper-layer mixed solution B; taking the upper-layer mixed solution B, and carrying out distilling to recover the mixed solvent B, so as to obtain a light component of the coal tar; proportionally adding a mixed solvent C into the light component of the coal tar, carrying out intensive mixing, carrying out standing, and carrying out layering, so as to obtain an upper-layer mixed solution C; taking the upper-layer mixed solution C, carrying out filtering, and carrying out distilling to recover the mixed solvent C, thereby obtaining the special asphalt. According to the method, the special asphalt can be obtained from the coal tar through progressive separation at normal temperature under normal pressure and can be applied to high-end carbon-material raw materials, and the requirements of subsequent preparation on products with high added values are met.
Owner:SHANDONG RUICHENG AEROSPACE CARBON MATERIAL CO LTD
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