236 results about "Coal oil" 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 discloses a coal slime flotation collector and a preparation method thereof. The coal slime flotation collector comprises the following matters in percentage by weight: 20-50 percent of kerosene and/or light diesel oil, 1-5 percent of primary emulsion, 0.006-0.015 percent of auxiliary emulsion and the balance of water; wherein the primary emulsion is a mixture of polyoxyethylene sorbitan fatty acid ester and dehydrated sorbitol fatty acid ester, and the hydrophile-lipophile balance (HLB) value of the primary emulsion is within 12.8-14.3; the auxiliary emulsion is selected from the following (1) or (2), wherein the (1) is sodium dodecyl benzene sulfonate, and the (2) is a mixture obtained by mixing fatty alcohol polyoxyethylene ether sulfate and the sodium dodecyl benzene sulfonate according to the mass ratio of 1: 0.5-2. The coal slime flotation collector has good stability, simple preparation process and 40-60 percent of the oil-saving ratio on the premise of improving the float yield and the tail coal ash proportion. The collector is beneficial to saving the energy, reducing the emission and improving the economical benefit when being used for floating the coal slime.

The invention discloses the coal oil hydrocracking method. The method comprises the following steps: mixing the coal oil and hydrogen gas, adding them into hydrogenation reaction chamber, getting the generating oil, putting the generating oil into heat-high pressure separator, getting light-end products and water from upper logistics, putting lower logistics and hydrogen gas into hydrocracker reaction chamber, getting hydrocracking product, putting the product into high pressure separator, getting hydrogen gas to be used again, and putting the liquid into fractionating tower to get gas, petrol, diesel, light-end products and tail oil. The invention uses low grade coal oil to produce premium grade gasoline and diesel.

The invention relates to a method for simultaneously producing liquid fuel and asphalt paving materials by coprocessing coal and heavy oil. The method comprises the following steps: mixing coal dust, catalyst and heavy oil to prepare pulp; preheating and entering a reactor to carry out reaction; separating reaction products to separate gaseous substance, light oil, water and heavy mixture; extracting hydrogen from the separated gaseous substance through pressure swing adsorption; returning the purified hydrogen to the reactor to be used circularly, and using the remaining gas as fuel after purification; carrying out oil-water separation on the separated light oil and water to obtain the light oil and the water; leading the heavy mixture into a distilling tower to obtain coarse oil and tower bottom product through distillation separation; mixing the coarse oil and the light oil to obtain liquid fuels of gasoline, kerosene, diesel fuel, fuel oil, and the like through upgrading process; and processing the tower bottom product to get the asphalt paving materials. The invention has the advantage that under the moderate process condition, the liquid fuel and asphalt paving materials canbe produced simultaneously.

A process for preparing high-quality diesel oil or jet fuel from liquefied coal oil with the highest output includes filtering, stable hydrogenation to obtain diesel oil fraction and tail oil fraction, modifying them by deep hydrogenation, separating its product to obtain gas, naphtha fraction, diesel oil fraction, jet fuel, and tail oil fraction, and cyclic use of hydrogen-enriched gas. Its advantages are high output rate of diesel oil (more than 70 wt.%), low contents of S and N, low density and high hexadecane number.

The invention provides a combined technique for delayed coking and hydrogenation of coal tar. The combined technique adopts the delayed coking and hydrogenation method to perform delayed coking, hydrogenation and final refining on the coal tar, wherein the hydrogenation process comprises hydrotreating, hydrorefining and hydrocracking; and liquefied gas, fuel oil and lube base oil are finally obtained. The key point of the combined technique is to utilize the combined technique of delayed coking and hydrogenation to adjust the technological conditions of the delayed coking technology and the hydrogenation technology, so as to realize final aim of modification of the coal tar. The combined technique converts the coal tar with low value and high pollution into clean and superior liquefied gas, gasoline, diesel fuel, lube and so on, improves the added value of products, and reduces environmental pollution.

The invention discloses a coal tar hydrogenation processing method. The method of the invention comprises the steps that coal tar distillated oil or a full distillating pump with high content of impurities, colloid, asphaltene and oxygen elements is fed into a pre-hydrogenating reactor, the hydrogenation pre-treatment is performed under a certain reaction condition, the tiny impurities suspending in oil are separated through a separating device such as a filter and the like, then hydrogenating demetalization and deep hydrogenation refined reaction are performed in sequence, after water and light component are separated, and the material flow generated by the reaction enters into the hydrocracking reactor, thus gasoline fraction, diesel oil and hydrocracking tail oil are cut through a distilling device. Compared with the prior art, the method of the invention can ensure the device of long period of stable operation.

The invention discloses a method for producing a jet fuel or a jet fuel blending component. A mixed oil is obtained by mixing a Fischer-Tropsch synthesis fuel and a direct coal liquefaction oil; and the jet fuel or jet fuel blending component is obtained by hydrorefining, hydrocracking, isocracking and fractionating the mixed oil. According to the method provided by the invention, two prepared coal oils can be converted into the high-quality jet fuel or jet fuel blending component. Compared with hydro-upgrading of the direct coal liquefaction oil, the method has the advantages of mild reaction conditions, low device investment cost and low operation cost.

This invention relates to wet process of recovering zinc from leach slag containing zinc. It belongs to a wet process for zinc ore, in particular to a process for slag containing zinc produced from the systerm of wet zinc metallurgy. This method comprises the following steps: washing residue with water or diluted acid to get slag, selecting P204 as extractant and coal oil as thinner to extract them to water phase, configuring the solution containing zinc and sulfuric acid, eluting the impurity loaded in organic phase, back extracting the load organic phase with depleted electrolyte and sulfuric acid, transferring zinc in organic phase to water phase, deoiling all water phases which contact with organic phase, finally, taking the liquid which has been back extracted as fresh liquid, and adding it into zinc electrodeposition systerm. The invention has high metal recovery ratio, and can recovery zinc from leach slag containing zinc, save resource, avoid environmental contamination. And it perfectly joins with the process of wet processing of zinc oxide ore, decreases the consumption of acid in the leaching of zinc oxide, and reduces the cost.

The invention discloses a method for producing fuel oil from coal tar by hydrogenating and converting heavy aromatics to light ones. The method adopting the process of combining hydro-refining with hydro-refining/cracking comprises the following steps: mixing coal tar with hydrogen and entering a hydro-refining reaction area, separating the refined effluent by a separation system to obtain naphtha, diesel and heavy fraction, feeding the heavy fraction into a hydro-refining/cracking reaction area, and adding all of the effluent obtained in the hydro-refining/cracking reaction area to the separation system. The nitrogen content in the heavy fraction as feeding material for hydro-cracking can suppress the activity of the cracking catalyst, so that the heavy fraction is subjected to hydro-refining to reduce the nitrogen content before contacting with the hydro-cracking catalyst, thus fully exerting the activity of the cracking catalyst, facilitating the conversion of large molecules into light ones, improving yield of the light-weight fuel oil and prolonging the running cycle of the device.

The present invention relates to a method for producing a hydrocarbon product from coal and/or biomass comprising the following steps: converting the coal to a coal-oil and/or converting the biomass to bio-oil, optionally processing the coal-oil and/or bio-oil in a hydroprocessing reaction to remove one or more of oxygen, nitrogen or sulfur from hydrocarbon compounds in the coal-oil and/or bio-oil; and using at least a portion of the coal-oil and/or bio-oil as a feedstock in a cracking reaction to convert hydrocarbon compounds in the feedstock into a mixture of smaller hydrocarbon compounds comprising the hydrocarbon product.

The invention relates to a method of hydrogenation to improve quality of solvent oil. The invention takes one or more petroleum fractions from petrol, coal oil, diesel oil as raw materials, contactly reacting with hydrogenation catalysis containing ª

The invention relates to a method used for producing bunker fuel oil by blending low-temperature carbonization coal tar. The method is to respectively measure the properties of the part over water and the part below water of the low-temperature carbonization coal tar, a blending experiment of the part over water and the part below water of coal tar is practiced according to the measurement result and bunker fuel oil standards and the main indexes of the blend oil are determined to obtain proper blending ration and polypropylene higher alcohols ester additive is added to get qualified bunker fuel oil.

The invention relates to a coal and oil coprocessing method and device. The coprocessing method comprises steps as follows: step one, oil slurry pretreatment: heavy oil, a non-hydrogenated cycling solvent and a first catalyst are mixed, oil slurry is prepared and subjected to first hydrocracking reaction, a first product is obtained and separated, and first light distillate oil and first heavy distillate oil are obtained; step two, coal and oil coprocessing, solvent oil circulation and finished product separation. The coprocessing device comprises an oil slurry pretreatment device, a coal and oil coprocessing device body, a solvent oil circulating device and an oil product quality improving device. According to the coal and oil coprocessing method and device, selectivity for the heavy oil during coal and oil coprocessing is reduced, the percentage amount of pulverized coal in a coal and oil coprocessing process is increased, and the coal and oil coprocessing method and device are more suitable for practical application.

The invention discloses an asphalt strip and preparation and construction methods thereof, belonging to the technical field of asphalt pavement construction. The asphalt strip is characterized by comprising the following components in parts by weight: 70-90 parts of asphalt, 2-10 parts of a styrene-butadiene copolymer, 8-15 parts of solvent naphtha, 1-5 parts of a filler, 1-5 parts of a stabilizer and 0.1-0.3 part of an antioxidant, wherein the solvent naphtha is one of aromatic hydrocarbon oil, coal tar, diesel oil or kerosene; and the asphalt is petroleum asphalt or coal tar pitch. The construction method of the asphalt strip comprises the following steps: flushing, dedusting, caulking and welting. The asphalt strip has high viscidity and extensibility, filling of a pavement crack can be finished without heating, the construction method of the asphalt strip is short in used time, and can be finished without an assist of crack sealing equipment, and the construction effect is firm and lasting.

The invention discloses a method for recycling gold in cyanided tailings in a ramified and series flotation mode. The method includes the following steps that ore pulp pretreatment is conducted, and sodium carbonate and ferrous sulfate are used as ore pulp regulators; coal oil flotation decarbonizing is carried out; ramified pulp mixing is conducted, the decarbonized ore pulp automatically flows to a stirring and distributing groove, and the ore pulp is evenly distributed to two pulp mixing barrels for mixing pulp through the stirring and distributing groove; ramified and series flotation is performed, foam products in first rougher flotation fully enter in second rougher flotation to be subjected to flotation together with the decarbonized ore pulp, foam products in second rougher flotation undergo closed circuit concentration operation of first concentration and second concentration to obtain gold concentrate, and no drug is added in the concentration stage; products in the groove of first rougher flotation are subjected to closed circuit scavenging of first scavenging and second scavenging to obtain tailings. By the adoption of the method, the recovery rate of the gold can be improved obviously, meanwhile, drug consumption is lowered, and the cost is saved.

This invention relates to a method of producing aromatics and olefins from oils derived from coal or wood, including partially saturating and cracking the oils derived from coal or wood in a hydrogenation & reaction area, separating them depending on the number of carbons, recirculating heavy oils having 11 or more carbons to the hydrogenation & reaction area, feeding oils suitable for producing BTX to an aromatic separation process and a transalkylation process to recover aromatics, and feeding hydrocarbonaceous components having 5 or less carbons to a light separation process, thus obtaining olefins.

A stable hydrogenation process of liquefied coal oil includes filtering the liquefied coal oil, adding it along with hydrogen gas to stable hydrogenation reactor, contacting with hydroprotector and hydrorefining catalyst, flowing in its product through high-pressure separator, low-pressure separator and fractional tower to respectively obtain hydrogen-enriched airflow, light fraction and tail oilfraction, mixing said hydrogen-enriched airflow with fresh hydrogen, and returning the mixture back to said stable hydrogenation reactor. It has high effect on removing impurities from liquefied oil to maximum.

A process for preparing fuel oil with coal oil, relating to the method of retarding charring by using coal oil and the hydrogenation process, comprising retarding the coal oil charring at temperature 500~520 DEG C and pressure 0.22~ 0.26 MPa; controlling the quantity of filling water during the process, in proportion 3~10% of the waterless coal oil by weight, and getting fuel oil, liquid gas and coke products. The fuel oil needs further hydrofining to improve the quality of products; the hydrogenation temperature is 350~400 DEG C, pressure is 6.0~8.0, pitot is 0.5~3.0/h, the proportion between hydrogen and oil is 1000~1300:1; fractionating the hydrofined oil products and getting the product fitting national standard 90.

The invention discloses a hydrogenation technique for secondarily processing gasoline and diesel oil through naphthenic base. Naphthenic base coking diesel oil and catalytic diesel oil with low cetane value are mixed and then enter into the first reactor of a hydrotreatment device for carrying out hydrogenation-modifying reaction; the generating oil of the first reactor is mixed with the coking gasoline through a heat exchange facility and then enters the second reactor of the hydrotreatment device for carrying out deep hydrogenation-refining reaction; gas-liquid separation is carried out on the matter flows obtained hydrogenation refining; the gas obtained through separation circulates to a reaction part; the liquid phase product obtained through separation enters a fractionating tower through a stripping tower, thus respectively obtaining qualified hydrogenated naphtha, hydrogenated coal oil and hydrogenated diesel oil. In the invention, deep hydrogenation is carried out for obtaining secondarily processed gasoline and diesel oil of poor quality. The economic benefits of oil refinery enterprises can be remarkably improved.

The invention provides a method for extracting biphenyl and indole from the recycled wash oil of coal tar at the same time, which comprises the steps: (1) obtaining rich indole biphenyl fractions from the decompression and the rectification of the recycled wash oil; (2) carrying out multistage extraction and separation to the rich indole biphenyl fractions by using a double solvent extracting agent which comprises a polar solvent and a non-polar solvent, the weight ratio of the indole biphenyl fractions to the polar solvent to the non-polar solvent is 1:0.25 to 1:0.5 to 1.5 and the extraction temperature is 10 to 50 DEG C; (3) indole products are obtained by the rectified purification and the crystallized purification of the extraction solution; (4) biphenyl products are obtained by the rectified purification and the crystallized purification of the extraction solution. The method is simple and can extract and obtain highly pure biphenyl and indole from the recycled wash oil of the coal tar, which promotes the recycling value of the recycled wash oil of the coal tar, and the recycling use of the solvents reduces production cost, thus the method is suitable for industrial production.