35 results about "Coal tar preparation" patented technology

The invention provides a method for preparing honeycomb-like activated carbon by using coal and coal tar, which takes coal dust and the coal tar as raw materials to prepare the honeycomb-like activated carbon by grinding the coal dust, charge mixture, vacuum pugging, seal aging, vacuum extruding and moilding, drying, carbonization and activation. The method for preparing the honeycomb-like activated carbon only takes the coal tar as cementing agent, so as to overcome the defect that multiple cementing agents are needed to be applied in the technique, thus having the characteristics of simple raw materials, low production cost and easy industrialization. The produced honeycomb-like activated carbon has the characteristics of large geometric area and specific surface area, high mechanical strength and the like, and can be applied for the treatment of waste gas and waste water and catalyst carrier.

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.

The invention discloses a processing technology for preparing various pitches and fuel oils by coal tar which comprises the steps that: the coal tar is heated to 350 DEG C to 360 DEG C, rectified at ordinary pressure first and then at reduced pressure, primarily ultracentrifugated and secondarily ultracentrifugated to produce purified pitch, impregnating pitch, modified pitch, high softening point pitch and fuel oils. The invention has simple technology and convenient operation, can produce various high quality pitches and fuel oils and is characterized by less investment in devices and stable quality, thus better solving the problems of low general grade of pitches of China at present, unstable fraction of fuel oils and pitches and plenty of impurities and being quite applicable to the processing and producing of the fuel oils.

The invention relates to a system and method for preparing high-octane gasoline, aviation kerosene and naphthenic base oil with total-hydrogen-type coal tar. The system is formed by a coal tar refining device, a distillate oil deep refining, isomerization-visbreaking and post-refining device and a naphtha dehydrogenizing and aromatic extraction device. The method includes the steps that coal tar serves as a raw material, is subjected to hydrorefining, deep refining, isomerization visbreaking and post-refining treating, and then is subjected to a naphtha dehydrogenizing technology and an aromatic extraction technology, and the high-octane gasoline, the aviation kerosene and the naphthenic base oil are obtained. Meanwhile, a mass of hydrogen is generated to serve as supplemented hydrogen of coal tar hydrogenation, the obtained product oil is good in quality, and after detecting is carried out according to the national standard, various detected indexes meet the national standard.

The invention discloses a method for preparing fuel oil. In the method, high-temperature reaction, distilling separation and other processes are performed on coal tar used as a raw material under the action of a catalyst to prepare fuel oil. The method for preparing fuel oil from coal tar has the advantages of simple process, low requirement on equipment, high conversion rate and high fuel oil yield rate of more than 64% and belongs to the field of the preparation of fuel oil from coal tar.

The invention relates to a system and method for preparing high-octane gasoline, aviation kerosene and naphthenic base oil with total-hydrogen-type coal tar. The system is formed by a coal tar refining device, a distillate oil deep refining, isomerization-visbreaking and post-refining device and a naphtha dehydrogenizing and aromatic extraction device. The method includes the steps that coal tar serves as a raw material, is subjected to hydrorefining, deep refining, isomerization visbreaking and post-refining treating, and then is subjected to a naphtha dehydrogenizing technology and an aromatic extraction technology, and the high-octane gasoline, the aviation kerosene and the naphthenic base oil are obtained. Meanwhile, a mass of hydrogen is generated to serve as supplemented hydrogen of coal tar hydrogenation, the obtained product oil is good in quality, and after detecting is carried out according to the national standard, various detected indexes meet the national standard.

The invention relates to a method for preparing clean fuel oil from coal tar, belonging to the field of coal tar reprocessing. The method comprises the following steps: mixing coal tar and a specific solvent, holding the mixture in a high-pressure autoclave at constant temperature for several hours, cooling to room temperature, separating the reaction liquid, and extracting to obtain the fuel oil. In the coal tar supercritical extraction process, the solvent has the functions of both extraction and hydrogenation, and the coal tar is lightened under the condition of no need of high-temperature high-pressure catalyst, thereby saving abundant energy sources and hydrogen resources.

The invention discloses a processing technology for preparing various pitches and fuel oils by coal tar, which comprises the steps that: the coal tar is heated to 350 DEG C to 360 DEG C, rectified at ordinary pressure first and then at reduced pressure, primarily ultracentrifugated and secondarily ultracentrifugated to respectively produce purified pitch, impregnating pitch, modified pitch, high softening point pitch and fuel oils. The invention has simple technology and convenient operation, can produce various high quality pitches and fuel oils and is characterized by less investment in devices and stable quality, thus better solving the problems of low general grade of pitches of China at present, unstable fraction of coal tar pitches and plenty of impurities and being quite applicableto the processing and producing of the coal tar.

The invention relates to a system and method for preparing coal tar, gas and semi-coke by activating coal gas and flash pyrolysing coal with a solid heat carrier. The system comprises a raw coal primary processing apparatus, a pyrolytic reaction separator, a semi-coke heating separator, a recycling apparatus, a coak tar recovering apparatus and a semi-coke cooling apparatus; a part of semi-coke powder discharged from the pyrolytic reaction separator enters the semi-coke heating separator, high-temperature smoke discharged from the semi-coke heating separator enters the recycling apparatus, the coal tar recovering apparatus produces coal tar and coal gas, and the semi-coke cooling apparatus produces semi-coke. In the existing coal tar preparation method, the coal pyrolytic optimization of the coal is not good, so that the existing coat tar preparation method has the technical problems of low oil yield, high investment and high energy consumption. The system for preparing the coal tar, gas and semi-coke by activating the coal gas and flash pyrolysing the coal with the solid heat carrier is rapid in pyrolysis, rapid in output and rapid in cooling.

The invention provides a method for preparing diesel oil for alpine regions with gas condensate and coal tar. The method comprises the following steps of: transferring the gas condensate under normal temperature to heating equipment to be heated, wherein the heating temperature is 60-180 DEG C; transferring the heated gas condensate to evaporation separation equipment to undergo evaporation separation to obtain light components and heavy components of the gas condensate; and blending the heavy components of the gas condensate, light oil fractions of the coal tar and a special additive and standing to obtain the diesel oil, wherein the specific steps are as follows: pumping the heavy components of the gas condensate, the light oil fractions of the coal tar and the special additive into a reaction kettle with a stirring device according to the predetermined weight percent, stirring the materials for 30-60min, discharging the product and storing the product in a storage tank statically for 24h to obtain the diesel oil; and the weight percents of the heavy components of the gas condensate, the light oil fractions of the coal tar and the special additive are respectively 20-70%, 20-60% and 10-20%.

The invention discloses a method for preparing diesel through coal tar. Hydrogen and the coal tar are distilled and mixed and then enter a reactor with the hydrogen and oil volume ratio of 850:1100. The reaction temperature is 290-365 DEG C, the reaction pressure is 2-9 MPa, and the air speed is 2-4 / h. A reaction is conducted under the action of catalyst, and a liquid product is obtained after gas-liquid separation.

The invention provides a method for preparing honeycomb-like activated carbon by using coal and coal tar, which takes coal dust and the coal tar as raw materials to prepare the honeycomb-like activated carbon by grinding the coal dust, charge mixture, vacuum pugging, seal aging, vacuum extruding and moilding, drying, carbonization and activation. The method for preparing the honeycomb-like activated carbon only takes the coal tar as cementing agent, so as to overcome the defect that multiple cementing agents are needed to be applied in the technique, thus having the characteristics of simple raw materials, low production cost and easy industrialization. The produced honeycomb-like activated carbon has the characteristics of large geometric area and specific surface area, high mechanical strength and the like, and can be applied for the treatment of waste gas and waste water and catalyst carrier.

The invention relates to a method for producing naphthenic base refrigerating machine oil base oil by using coal tar oil. The method comprises the following steps of: (1) carrying out first-stage hydrofining on the coal tar oil; (2) carrying out fractional distillation on a first-stage hydrofining product; (3) carrying out secondary-stage hydrofining on residual oil fractions; (4) carrying out fractional distillation on secondary-stage hydrofining oil; (5) carrying out clay refining on refrigerating machine oil distillate oil, thus obtaining high-additional value products such as the naphthenic base refrigerating machine oil base oil, naphtha oil, diesel oil and refrigerating machine oil base oil. The method has the advantages that the hydrogenation industrial chain of the coal tar oil is extended, the utilization value of the coal tar oil is increased, and the refrigerating machine oil base oil with the high quality is obtained.

The invention provides a method for preparing diesel oil for alpine regions with gas condensate and coal tar. The method comprises the following steps of: transferring the gas condensate under normal temperature to heating equipment to be heated, wherein the heating temperature is 60-180 DEG C; transferring the heated gas condensate to evaporation separation equipment to undergo evaporation separation to obtain light components and heavy components of the gas condensate; and blending the heavy components of the gas condensate, light oil fractions of the coal tar and a special additive and standing to obtain the diesel oil, wherein the specific steps are as follows: pumping the heavy components of the gas condensate, the light oil fractions of the coal tar and the special additive into a reaction kettle with a stirring device according to the predetermined weight percent, stirring the materials for 30-60min, discharging the product and storing the product in a storage tank statically for 24h to obtain the diesel oil; and the weight percents of the heavy components of the gas condensate, the light oil fractions of the coal tar and the special additive are respectively 20-70%, 20-60% and 10-20%.

The invention discloses a method for preparing diesel oil from coal tar. In the method, the coal tar and a catalyst are added into a reactor; after the reactor is closed, the temperature of the reactor is heated to 320-400 DEG C and the temperature is maintained for 0 to 20 minutes; after the temperature is reduced to the room temperature, a reactor product is taken out from the reactor; then distilling and separating are carried out; the cut fraction of 80 to 280 DEG C is taken out, thus obtaining the diesel oil. The method provided by the invention has the advantages of simple technique, low requirements to devices and high conversion rate. The invention belongs to the field of preparing diesel oil from coal tar.

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.