987 results about "Coal tar product" patented technology

The invention discloses a hydrocracking treatment technique for coal tar total distillate, which comprises: first mixing with homogeneous catalyst, or adding impurity, gum, asphaltene and coal oil total distillate contained much oxygen element directly into suspended-bed hydrogenation device; cutting the stream with distilling plant to discharge water, distillate less than 370Deg that enters fixed bed reactor for hydrorefining reaction to cut gasolene less than 150Deg and diesel oil 150-370Deg, and tail oil less than 370Deg that recycles to said reactor and converts into light oil product. Compared with prior art, this invention is simple, but high conversion rate and stability.

The invention provides complete equipment and process for processing coal tar wastewater, and belongs to the technical field of environmental conservation. The process comprises the following steps of: adopting different removal principles according to different physicochemical properties of heavy oil, light oil and emulsified oil; scientifically and orderly removing the heavy oil, light oil and emulsified oil through three sets of environmental conservation equipment such as a multi-stage oil separator, an oil-water separator and an air floating tank gradually; combining a micro electrolysis reactor with a five-section integrated oxidization device; and firstly destroying a benzene ring by microelectrolysis, and then strongly oxidizing various organic matters through an oxidant, so that the COD (chemical oxygen demand) and the chromaticity are greatly reduced. Ammonia nitrogen can be efficiently removed by a denitrification system; the denitrification system is low on requirements of pH value and temperature, and low in operation cost; the denitrification system is arranged behind the five-section integrated oxidization device; the reaction change of power of hydrogen is fully considered; and the complete equipment complies with the scientific principle, and can be used for reducing feeding of acid and alkali, and lowering the operation cost.

The invention discloses a coal tar hydrodemetalization catalyst and a preparation method thereof. The method comprises the steps of: (1) taking or preparing an alumina carrier; (2) treating the alumina carrier from the step (1) with an organic acid solution with pH value lower than 3; then impregnating the alumina carrier subjected to acid treatment with an aluminium nitrate solution; and drying and roasting to obtain a modified alumina carrier; and (3) loading and hydrogenating an active component by an impregnation method to obtain the coal tar hydrodemetalation catalyst. Compared with the prior art, the coal tar hydrodemetalation catalyst provided by the invention has better activity and activity stability, and longer operation cycle.

The invention discloses a method for hydrogenation of coal tar via a fluidized bed. The method comprises the following steps: subjecting a coal tar raw material to hydro-upgrading; carrying out separation to remove water; and then carrying out hydrorefining and fractionation so as to obtain a gasoline fraction, a diesel fraction and hydrogenation tail oil. A hydro-upgrading catalyst used in the method comprises iron oxyhydroxide, organic polybasic carboxylic acid, macroporous alumina, a molecular sieve and pseudo-boehmite; and a hydrofining catalyst used in the method comprises iron oxyhydroxide, organic polybasic carboxylic acid, macroporous alumina and a binder. The method provided by the invention adopts cheap iron oxyhydroxide as an active metal component, the hydro-upgrading catalyst and the hydro-refining catalyst are graded, so cost is low. According to the invention, moderate cracking of coal tar is carried out before refining of coal tar, so impurities in coal tar are effectively removed, product distribution and product quality are adjusted, and the running period of a device is prolonged.

The invention relates to a catalyst used for coal tar pitch hydrocracking lightening reaction. The preparation method of the catalyst comprises the following steps: taking an inorganic porous material as a carrier; selecting at least one of alumina, silica gel containing alumina, MCM-41 (mobile crystalline material-41) and SBA-15 (santa barbara amorphous-15); loading one or two of metal elements Fe, Ni, Co and Mo of active components onto the carrier in the form of metallic oxide or metallic sulphide by adopting a vacuum immersion method, wherein the metallic oxide or metallic sulphide content of the active components is 1-20wt% of the catalyst; then drying for 1-14 hours under the conditions that nitrogen is used for protection, normal pressure is kept and the temperature is 70-120 DEG C; and then roasting at the temperature of 500 DEG C for 3 hours. The catalyst in the invention has the advantages of simple preparation process, high catalytic activity, less reaction coking and high cracked light oil yield, thus being especially applicable to hydrocracking lightening of heavy component and pitch in coal tar, and the catalyst in the invention can cause conversion per pass of coal bar pitch to reach more than 70%.

Belonging to the technical field of refractory materials, the invention relates to taphole stemming used for oversize blast furnaces over 4500m<3>. The taphole stemming used for oversize blast furnaces comprises by weight: 25-50% of brown corundum, 5-20% of silicon carbide, 7-25% of ferro-silicon nitride, 15-30% of a composite carbon material, 5-15% of kaolin, 3-7% of composite refractory material micropowder, and 1-5% of composite metal powder. The stemming is prepared by the steps of: conducting weighing and burdening according to the above ratio of various raw materials, mixing them well and adding a coal tar binder accounting for 15-25% of the total weight of the additionally added dry materials, then conducting rolling and mulling so as to obtain a mud material. The stemming of the invention has good comprehensive performance, stable taphole depth, long tapping time, good erosion and scouring resistance, as well as good construction performance.

The invention relates to an upflow type hydrogenation thermal cracking method with a characteristic of high-aromatic-carbon-rate poor-quality hydrocarbon branching feeding. According to the present invention, the upflow type hydrogenation thermal cracking method is suitable for the suspension bed hydrogenation thermal cracking process R10 of coal tar heavy oil having the high contents of metals, polycyclic aromatic hydrocarbons, colloid and asphaltene and having the conventional boiling point of higher than 450 DEG C, wherein the R10 comprises two or a plurality of operation series connecting sub-hydrogenation reaction zones such as a first sub-hydrogenation reaction zone R101, a second sub-hydrogenation reaction zone R102 and the like, poor-quality hydrocarbon HDS is divided into the two-branch raw material such as HDS1 and HDS2 or multi-branch raw material, the HDS1 enters the R101, and the obtained reaction effluent R101P or the stream R101PX containing the hydrogenation generation oil of the R101P enters the R102 and contacts the HDS2, such that the concentration of the fresh raw material HDS2 in the R102 liquid phase can be reduced, the ratio of the hydrogen supply hydrocarbon weight to the fresh raw material HDS weight in the SHS flowing-through reaction zone can be significantly increased when the R101 uses the hydrogen supply hydrocarbon stream SHS, and the thermal condensation coking rate can be reduced.

A modified coal asphalt with linear resin molecule structure and adjustable softening point is prepared from one or more of coal tar, antracene oil, phenol oil, naphthelene oil and the coal asphalt with softening point lower than 130 deg.C through using acid to regulate pH value, and polymerizing reaction on formaldehyde or tripolyformaldehyde or polyformaldehyde which controlling temp, pressure and time.

The invention relates to a coal tar hydrogenation catalyst and a preparation method thereof. The catalyst consists of an active ingredient and a carrier. The active ingredient is one or more of molybdenum, nickel, cobalt or tungsten water-soluble salt. The carrier is coal gangue. The content of the active ingredient is 60-90 wt%, and the content of the carrier is 10-40 wt%. The catalysis to forming load of the active ingredient on the coal gangue carrier is effectively achieved through a negative pressure freeze-drying forming process, the coal tar hydrogenation catalyst is used in a coal tar suspended bed hydrocracking technological process and has good hydrogenation activity, the production rate of light oil reaches to more than 96%, the coal gangue is cheap and easily obtained and can be recycled and used repeatedly, and the preparing and using cost of the catalyst can be reduced remarkably.

The invention relates to a process for preparing a needle coke raw material by using coal tar and through heavy-phase circulation. The process comprises the steps that: (1) coal tar is sufficiently mixed with a first solvent; first solvent insoluble matters are removed from the mixture with a physical separation method, such that a first clarified liquid is obtained; (2) the first solvent is removed by separation; the obtained residual component is subjected to hydrogenation, such that refined asphalt is obtained; (3) the first solvent insoluble matters and a second solvent are sufficiently mixed; second solvent insoluble matters are removed from the mixture with a physical separation method, such that a second clarified liquid is obtained; (4) the second solvent in the second clarified liquid is removed by separation, such that a refined heavy component is obtained; and (5) the refined asphalt and the refined heavy component are mixed, such that the raw material used for preparing needle coke is obtained. With the process provided by the invention, the obtained needle coke raw material has high polyaromatic condensed polycyclic aromatic content, such that needle coke product yield is effectively improved.

The invention belongs to the technical field of brown coal quality improving, and relates to a large-scale brown coal quality-improving process and a large-scale brown coal quality-improving apparatus. According to the invention, an interrelated large-scale continuous brown coal quality-improving system is composed of three modules which are a tunnel internal-heat drying module, an external-heating microwave destructive distillation module, and a powdery brown coal molding and drying module. Because of large-amount water discharging, a brown coal block large-capillary framework is collapsed, so that the brown coal is naturally broken into small blocks and powder without mechanical disruption. The small-block brown coal is subjected to destructive distillation under high-temperature hot wind external heating and microwave coupling, until the blocks turn into semi-coke; water-containing coal gas, water-containing coal tar, anhydrous gas, and anhydrous coal tar are respectively obtained by destructive distillation. With a binder of the water-containing coal tar and coal tar pitch (one or a mixture thereof), the powdery brown coal is subjected to kneading and aging; the material is processed into granules by using a vacuum extrusion granulator; and the particles are processed by using a low-temperature microwave drying device, so that high-quality brown coal particles with high strength, low moisture absorption, and high heat value are obtained. The brown coal particles can endure long-distance transportation.

The invention relates to a catalyst for using coal tar to prepare clean fuel oil by catalytic hydrogenation, comprising the following components in percentage by mass: 4 to 15 percent of molybdenum oxide, 3 to 9 percent of nickel oxide, 0.1 to 5 percent of cobalt oxide, 10 to 25 percent of tungsten oxide, 2.5 to 40 percent of silicon oxide and 26 to 65 percent of aluminium oxide. The preparation method of the catalyst comprises the following steps of: firstly, preparing a silicon oxide-aluminium oxide carrier, loading active components of Co, Mo, Ni and W on the carrier by an isosteric dipping method, drying, baking and forming. The catalyst can be used for the preparation of the clean fuel oil by catalytic hydrogenation of the coal tar, gasoline and diesel oil obtained from the prepared fuel oil after being separated respectively meet the national standard of 93# gasoline and 0# diesel oil.

The invention discloses a single-stage fine coal multi-pipe rotary low-temperature destructive distillation technology and a system. The single-stage fine coal multi-pipe rotary low-temperature destructive distillation technology adopts a multi-pipe rotary destructive distillation machine to carry out low-temperature destructive distillation of fine coal. Multiple destructive distillation pipes for dispersing fine coal are arranged in the multi-pipe rotary destructive distillation machine. Spiral blades are arranged in the destructive distillation pipes and have the effects of diversion and disturbance on coal. The single-stage fine coal multi-pipe rotary low-temperature destructive distillation technology and the system can enhance destructive distillation effects, can increase destructive distillation effective areas, have the advantages of large fine coal treatment amount, small destructive distillation gas treatment amount, low content of tar and dust, and high calorific value of gas, can realize recovery of chemical raw materials such as coal tar and the like produced in low-temperature destructive distillation of soft coal and low-order fine coal as completely as possible, can improve a comprehensive utilization rate of coal, and can realize production of semicoke powder and high-calorific value gas from soft coal and low-order fine coal through low-temperature destructive distillation.

The invention relates to an isotropic graphite negative electrode material and a preparation method thereof. The negative electrode material is surface-coated artificial graphite prepared by coating and modifying isotropic graphite with a coating agent composed of pitch and/or coal tar The layered isotropic graphite negative electrode material, the weight ratio of the coating agent to the isotropic graphite is 0.03-0.15:1. The preparation method comprises the following steps: weighing 100 parts of isotropic graphite, 3 to 15 parts of coating agent, and 10 to 70 parts of solvent, stirring and mixing evenly at 25 to 350° C., then vacuumizing, removing the solvent, and discharging glue, carbonization, and finally high-temperature treatment under the condition of 2400-3000° C. in an inert protective atmosphere to obtain the negative electrode material. The isotropic graphite negative electrode material has high coulombic efficiency and good cycle performance for the first time. The preparation method is easy to implement industrially.

The present invention provides a method and apparatus or system for determining an amount of coal tar that can enter, and subsequently be displaced from, a given type of soil for a range of depths of the soil. The method and apparatus also provide verification of the pressure at which coal tar can be displaced from a given type of soil. In particular, the method and apparatus simulate the hydrostatic pressure that a soil sample encounters in the subsurface of the ground. Accordingly, the method and apparatus provide a relationship between the concentration of coal tar in the soil and the pressure required to displace the coal tar from the soil, which allows for an estimation of the amount of coal tar that may be displaced at a particular location or site. Further, the method and apparatus are adaptable for use in the laboratory or the field.

The invention discloses a method for improving the yield of pyrolysis coal tar of low-rank coals. The method comprises the following steps: (1) drying raw coals; (2) swelling; (3) performing pyrolytic reaction; and (4) collecting coal tar. By adopting the method disclosed by the invention, on the premise that the production cost is considered, a pyrolysis process of the low-rank coals is improved to ensure that the total volatile matter yield is improved by 3-7%, the yield of the coal tar is improved by 3.4%, the added value of the low-rank coals is improved, and a pretreatment solvent can be recovered for recycling.

The invention discloses a method for producing activated carbon by thermally activating a coal tar dreg/sludge mixed fermentation body by using microwaves. The method comprises the steps of: firstly crushing and grinding coal tar dreg into more than 200 meshes, then, mixing the ground coal tar dreg with sludge, and performing aerobic fermentation for 10-20 days; then, adding zinc chloride servingas an activator into the mixed fermentation body, and infiltrating for 12-24h at 70-80 DEG C, wherein the added zinc chloride is 0.5-4 times more than the mixed fermentation body in mass; and finally, carbonizing and activating for 30-120min in a microwave carbonization furnace under a N2 protection condition to obtain coal tar dreg/sludge mixed activated carbon, washing with water till a neutralcondition is achieved, and drying to obtain a product disclosed by the invention. The method disclosed by the invention has the advantages of simplicity and convenience for operation, easiness for control, low cost, high product synthesis rate and favorable product performance, and can be widely applied to industrial wastewater treatment, refractory wastewater treatment, sound insulation, noise reduction, deodorization, oil absorption, lipid suction and other industries.

The invention provides a molded coal made from garbage and process for preparing same, wherein the molded coal comprises, (1) urban domestic refuse, (2) one or several flammable substances containing fixed carbon, including coal gangue, coal mud, stone coal, pulverized coke, bituminous shale, charcoal powder, coal, graphite powder, carbon black, (3) binder including loess, carclazyte, cement, soluble glass, industrial sewage, asphalt slag, coal tar, industrial maize starch and cellulose. The preparation process comprises the steps of sterilizing, artificial sorting, disintegrating, drying, charging binder, addition agent, mixing, magnetic separating, super fine crushing, modeling and drying.

The invention relates to a method for producing gasoline and diesel oil through hydrogenation of coal tar. The method comprises: cutting full-range distillate oil of coal tar into light distillates, medium distillates and heavy distillates, conducting hydrotreatment to the light distillates and medium distillates through segmented feeding, and introducing the medium distillates into a hydrogenating protective reaction area, a first hydrofinishing reaction area and a second hydrofinishing reaction area; leaving the light distillates only to enter the second hydrofinishing reaction area for moderate hydrotreatment. The method of the invention can produce clean diesel oil with low sulfur and high cetane value, and can simultaneously give consideration to produce gasoline blending components, thus providing an application approach with a higher added value for processing and utilization of coal tar and alleviating the current tense supply-demand situation of petroleum-based gasoline and diesel oil.

The invention discloses high-efficiency deep desulfurization active carbon and a preparation method thereof, belonging to the field of modified active carbon materials. The high-efficiency deep desulfurization active carbon is prepared through the steps of by adopting coal or a coconut shell as raw materials, crushing, screening, then adding a coal tar adhesive for extrusion forming, and calcining at 750-950 DEG C to form primary active carbon; carrying out dipping treatment on the primary active carbon, uniformly loading a hydroxide active agent and a cyclodextrin assistant active agent, carrying out secondary high-temperature calcination in the presence of excessive heat water vapors to obtain a high-efficiency desulfurization active carbon product. The active carbon prepared through the method disclosed by the invention has the advantages of high sulphur capacity, high desulfurization speed, long usage period, high strength, good abrasion resistance, good material permeability, no dust and the like, can not only be used for the large-scale deep desulfurization and purification of petrochemical products such as fuel oil, natural gas, gas, liquid hydrocarbon and synthetic ammonia, but also be used for the fields of pharmaceutical gas sterilization, solution filtration and purification, solvent recovery, water purification, gas purification and the like.

A surface amphiphilic nano-molybdenum disulfide hydrogenation catalyst and a preparation method and an application thereof are provided. The preparation method comprises the steps: preparing an initial reaction mixture from a molybdenum source, a sulfur source, a reducing agent, an ionic liquid and deionized water according to a certain sequence and method, then crystallizing in a sealed high pressure reaction kettle and under hydrothermal conditions, and filtering, washing and drying the crystallized product to obtain the surface amphiphilic nano-molybdenum disulfide hydrogenation catalyst. The ionic liquid is used in the synthesis system, and the prepared nano-molybdenum disulfide has good surface amphipathicity and has excellent dispersion and catalytic activity in both polar and non-polar catalytic reaction systems. The nano-molybdenum disulfide provided by the invention shows excellent catalytic activity in suspended bed hydrogenation deasphalting, hydrodesulfurization, hydrodenitrogeneration, aromatic hydrocarbon hydrogenation and other reactions of coal tar, heavy oil, superheavy oil, residual oil, shale oil and other heavy oils, and has good application prospects in photoelectric conversion, water photocatalysis for hydrogen production and other reactions.

The invention provides a novel hydrocracking catalyst special for coal tar and a preparation method and an application method thereof aiming at the problems of the conventional coal tar hydrocracking catalyst. The hydrocracking catalyst consists of active ingredients, an aid and a carrier, wherein the active ingredients of the hydrocracking catalyst consist of WO3 and NiO, the aid is ReO, and the carrier consists of activated alumina, zeolite and BaO; and the active ingredients and the aid respectively account for 14 to 34 percent and 0.4 to 1.2 percent of the total mass of the catalyst based on an oxide form. The method for preparing the catalyst comprises the following steps of: preparing the carrier, pretreating the carrier, impregnating, performing catalyst post-treatment and the like; and the catalyst preparation conditions are strictly controlled by introducing novel ultrasonic impregnation technology. Compared with the prior art, the catalyst is excellent in surface physicochemical properties, has good aromatic hydrocarbon saturated activity and proper cracking activity, and excellent high-temperature resistance and compression resistance, and effectively improves the quality and yield of hydrotreated product oil.

The invention discloses a solid fuel fluidized bed pyrolysis, gasification and combustion graded conversion device and a conversion method. The device and the method can be used for subjecting coal, biomass, solid waste and the like to pyrolysis, gasification and combustion graded conversion to produce pyrolysis gas, coal tar, synthesis gas and heat. The device mainly comprises a fluidized bed pyrolysis furnace and a multistage fluidized bed gasification and combustion furnace. The method includes pyrolyzing solid fuel in the fluidized bed pyrolysis furnace, extracting volatiles in the coal tar and the pyrolysis gas forms, conveying residual semicoke after pyrolysis into the multistage fluidized bed gasification and combustion furnace, enabling the residual semicoke to undergo gasification reaction partly in presence of oxygen and water vapor in a gasification layer to generate the synthesis gas to be outputted, delivering part of gasified semicoke into a combustion layer to combust in air and release heat, and conveying hot combusted ash into the pyrolysis furnace by taking the hot combusted ash as a heat carrier so as to provide heat required by solid fuel pyrolysis. The solid fuel fluidized bed pyrolysis, gasification and combustion graded conversion device and the conversion method achieve graded conversion and utilization of the solid fuel and particularly achieve gasification and combustion graded conversion of the semicoke.