70results about How to "Low sulfur and nitrogen content" patented technology

A two-way combined process of wax oil hydro-process and catalytic crack is carried out by entering wax oil, catalytic cracking re-circulating oil and catalytic cracking diesel oil into hydro-processor, hydrogenation reacting under existence of hydrogen and hydrogenation catalyst, separating for reactant to obtain gas, hydrogenation naphtha oil, hydrogenation diesel oil and hydrogenation tail oil, entering hydrogenation tail oil into catalytic cracker, crack reacting under existence of catalytic cracking agent, separating to obtain dry gas, liquefied gas, catalytic cracking gasoline, catalytic cracking diesel oil and catalytic cracking re-circulating oil and oil slurry, and circulating for catalytic cracking diesel oil and catalytic cracking re-circulating oil to hydro-processor. It has higher recovery rate and cetyl value, less sulfur content, arene content and coke output.

The invention discloses a hydrogenation processing method of Fischer-Tropsch synthetic oil, particularly, the method of the invention is that raw naphtha cut, raw diesel oil cut, mixed cut of raw naphtha and raw diesel oil or Fischer-Tropsch synthetic full cut oil in liquid-phase products acquired from Fischer-Tropsch synthetic process are treated by hydrogenation processing. The method comprises steps that raw material of the Fischer-Tropsch synthetic oil goes through at least two sections of hydrogenation processing catalyst bed layers with different activation for hydrogenation processing and then tail oil acquired from separation after hydrogenation processing is subjected to hydrogen cracking and then hydrogenation processing products and hydrogen cracking products are sent into different fractionating systems for separating. The method of the invention can acquire high-quality clean diesel oil with cetane value higher than 75 and excessively low-freezing clean oil with solidifying point lower than 50 DEG C below zero, meanwhile, the naphtha acquired is high-quality raw material used for producing ethylene by steam cracking.

The invention relates to a method for production of a diesel oil fraction and an aviation fuel fraction by use of animal and plant oils and fats, and the method comprises the following steps: a) performing refining processing on the animal and plant oils and fats; b) performing catalytic hydrogenation and deoxidation to obtain saturated linear alkanes and propane; c) performing hydroisomerization and hydrocracking processing to obtain an alkane material flow with higher branched chain degree; d) separating to obtain liquid hydrocarbons and gaseous hydrocarbons with the boiling point within the boiling point range of diesel oil, aviation fuels and naphtha; e) directly collecting the diesel oil fraction as a product, or cycling in whole or in part to continue isomerization and cracking reaction to increase production of the aviation fuel fraction; and f) mixing propane gaseous hydrocarbon and naphtha for steam reforming hydrogen production reaction, separating and purifying the obtained hydrogen to enter into a circulating hydrogen system; the method is used in the production of the renewable diesel oil and aviation fuels with excellent combustion performance and cold flow performance, and meanwhile efficient utilization of by-products and in-system supplement of hydrogen consumption can be realized.

A process for upgrading crude oil fractions or other hydrocarbon oil feedstreams boiling in the range of 36° to 520° C., and preferably naphtha and gas oil fractions boiling in the range of 36° to 400° C., employs a solid adsorption material to lower sulfur and nitrogen content by contacting the hydrocarbon oil, and optionally a viscosity-reducing solvent, with one or more solid adsorbents such as silica gel or silica, silica alumina, alumina, attapulgus clay and activated carbon in a mixing vessel for a predetermined period of time; passing the resulting slurry to a membrane separation zone, optionally preceded by a primary filtration step (i.e., single stage or multiple stages), to separate the solid adsorption material with the adsorbed sulfur and nitrogen compounds from the treated oil; recovering the upgraded hydrocarbon product having a significantly reduced nitrogen and sulfur content as the membrane permeate; mixing the solid adsorbent material with one or a combination of aromatic solvents such as toluene, benzene, the xylenes and tetrahydrofuran to remove and stabilize the sulfur and nitrogen compounds; transferring the solvent to a fractionation tower to recover the solvent, which can be recycled for use in the process; and recovering the hydrocarbons that are rich in sulfur and nitrogen for processing in a relatively small high-pressure hydrotreating unit or transferring them to a fuel oil pool for blending.

The invention discloses a method for producing chemical raw material and diesel oil by Fischer-Tropsch synthetic wax and the method is that the Fischer-Tropsch synthetic wax and hydrogen gas contact with hydrogen cracking catalyst under hydrogen cracking condition and then the reaction products are treated by fractionation; diesel distillate obtained is the clean diesel with a low freezing point, while the naphtha cut obtained is high-quality raw material used for cracking of steam to ethane, and distillation range is higher than the hydrogen cracking of tail oil circulation of the diesel oil, wherein, the hydrogen cracking catalyst is the hydrogen cracking catalyst containing Beta zeolite and the weight content of the Beta zeolite in the catalyst is 0.5 percent to 60 percent; the Beta zeolite has properties that SiO2/Al2O3 molar ratio is 20 to 150 and Na2O less than or equal to 0.2w percent. The method of the invention can prepare the Fischer-Tropsch synthetic wax into the clean diesel oil with a low freezing point and high-quality raw material used for producing ethylene by steam cracking.

The invention discloses a liquid phase hydrogenating method of hydrocarbon oil. In the method, recycle hydrogen and a recycle hydrogen compressor are cancelled; hydrogen reacts with fresh raw oil and partial recycle oil in the presence of a solvent or a diluent to form a mixture flow, and the mixture flow enters a reactor to contact with a catalyst; the other part of or all recycle oil is mixed with hydrogen, and an obtained mixture enters the reactor by a path or branches from spaces between catalyst bed layers of the reactor; partial reaction effluent is subjected to hydrogen sulfide removal and then used as recycle oil, and the other part enters a separator; and the solubility of the hydrogen in the solvent or the diluent is larger than that in the mixture of the fresh raw oil and the solvent or the diluent.

The present invention discloses a biphase hydrogenation method, which cancels circulating hydrogen and a circulating hydrogen compressor. Hydrogen is mixed with fresh crude oil and circulating oil under the existence of a solvent or a diluting agent so as to form a mixture flow; the mixture flows into a reactor to contact a catalyst; after the other part of the circulating oil is mixed with hydrogen for gas discharging, a circuit or a shunt circuit enters the reactor between reactor catalyst bed layers; after the solvent or the diluting agent is mixed with hydrogen for gas discharging, a circuit or a shunt circuit enters the reactor between reactor catalyst bed layers; the reacted effluent is used for gas-liquid separation and the liquid phase further separates the solvent or the diluting solvent for recycling use; a part of the separated liquid product is used as the product and the other part is used as the circulating oil.

The invention discloses a method for preparing light aromatics from coal tar. The method is characterized by comprising the following steps of: cutting the coal tar into light oil fraction lower than 200 DEG C and heavy oil fraction higher than 200 DEG C; sequentially enabling the light oil fraction lower than 200 DEG C to enter two fixed-bed hydrogenation reactors for selective hydrogenation refining; stripping and pre-distilling the obtained hydrogenated generating oil; and extracting, distilling and finely distilling the solvent to obtain light aromatic products, such as benzene, toluene, xylene, and the like and byproducts, such as non-aromatics and solvent oil. The invention has wide raw material resources, low production cost, long device-running period and good aromatic product quality.

The invention relates to a combined hydrotreating method. According to the method, a wax oil raw material enters a first hydrogenation reaction zone with an up-flow manner, such that a hydrotreating reaction is carried out; a reaction effluent from the first hydrogenation reaction zone enters a thermal high pressure separator; liquid-phase material flow from the bottom of the thermal high pressure separator is further separated by a thermal low pressure separator, such that dissolved gas is separated, and the material is directly used as a feed for a catalytic cracking device; hydrogen-rich gas and hydrocarbon fraction separated from the top of the thermal high pressure separator are mixed with a fresh diesel raw material; the mixture is subjected to a hydrogenation modification reaction in a second hydrogenation reaction zone; a reaction effluent from the second hydrogenation reaction zone is separated, such that a hydrogen-rich gas is obtained; and the hydrogen-rich gas is compressed, and is circulated back to the first hydrogenation reaction zone and the second hydrogenation reaction zone. With the method provided by the invention, device equipment investment and operation cost can be effectively reduced, and oil refining process economic efficiency can be improved to a maximal extent.

The invention relates to a combined technique for improving yield of high-octane gasoline by using inferior catalytic cracking diesel. The combined technique comprises the following steps: firstly, carrying out polycyclic aromatic hydrocarbon selective hydrogenation, desulfurization and denitrification reaction on the inferior catalytic cracking diesel through a hydrofining reactor at a hydrogen atmosphere and under a relatively gentle refining condition; feeding a refined liquid-phase product into a reactor for conversion to light fraction and filled with a noble metal catalyst and carrying out hydrogenation conversion to light fraction; and finally, achieving the purpose of increasing the yield of the high-octane gasoline. By the technique, the inferior catalytic cracking diesel can be treated, and meanwhile, reforming C10+ heavy aromatics are converted to light fraction; the combined technique has relatively high gasoline fraction yield, gasoline fraction aromatics selectivity and liquid yield, and meanwhile, the inferior catalytic cracking diesel and the C10+ heavy aromatics are utilized effectively at high value.

The invention discloses a solid-liquid two phase hydrogenation method. In the method, the circulating hydrogen and a circulating hydrogen compressor are not used, hydrogen is mixed with fresh raw oil and circulating oil to form mixing material current in the presence of a solvent or a diluent, the mixing material current enters a reactor, a part of or all the circulating oil is mixed with the hydrogen, and enters the reactor from the catalyst bed interlayers through one path or a plurality of branch paths, a part of the reaction effluent is used as the circulating oil, and another part of the reaction effluent is separated to be the solvent or the diluent, the liquid product is the finished product, the gas with the volume percentage of between 0.1 and 15 percent is contained in the reactor according to the total volume of the reactor, and the solubility of the hydrogen in the solvent or the diluent is larger than that in the mixture of fresh raw oil and the solvent or the diluent.

The invention discloses a method of hydrocarbon oil liquid-solid two-phase hydrogenation; the method avoids the recycle hydrogen and the recycle hydrogen compressor; hydrogen is mixed with fresh raw oil and a part of recycle oil under the existence of solvent or diluent; after the gas is separated in the mixer, the mixture is fed into the reactor and contacted with the catalyst for reaction; the other part of the recycle oil is mixed with hydrogen and solvent or diluent and the gas is separated; the mixture is all or partially fed into the bed of the catalyst; the effluent of the reaction is discharged from the bottom of the reactor for separation; the separated solvent or the diluent is used for recycle use; the liquid product is used as the product or the recycle oil; the solubility of hydrogen in solvent or diluent is more than the solubility of hydrogen in the mixture of fresh raw oil and solvent or diluent.

The invention discloses an Mg-Al hydrotalcite-like compound catalyst for treating residual oil and extra heavy oil material and a preparation method of the Mg-Al hydrotalcite-like compound catalyst. The preparation method of the catalyst comprises the following steps: preparing a mixed aqueous solution of magnesium nitrate and aluminum nitrate; preparing an alkaline aqueous solution of sodium carbonate and sodium hydroxide; moreover, adding the mixed aqueous solution and the alkaline aqueous solution into water, stirring under the condition of keeping the pH value to be 9 to 12, and then performing preparation to obtain an Mg-Al hydrotalcite-like material; mixing the Mg-Al hydrotalcite-like material with size of clay and a binding agent, and sequentially performing spray drying and calcination, so as to obtain the Mg-Al hydrotalcite-like compound catalyst. The Mg-Al hydrotalcite-like compound catalyst can be directly used for the production of high quality gasoline and diesel oil through conventional catalytic cracking, is high in water-heat resistance, can be applied to a one-step method diesel oil preparation technology or the production of chemical products, such as olefin or arene, and realizes the maximum utilization of the resource value, moreover, synthesis gas with the H/C ratio being approximately 1 is prepared from a mixture of vapour and water as regeneration gas by adopting a vaporization and regeneration technology.

The invention discloses a coal tar hydrogenation upgrading method. The method includes the following steps: carrying out fractionation cutting on coal tar to obtain a first component with the boiling temperature not higher than a cutting temperature of fractionation cutting and a heavy component with the boiling temperature higher than the cutting temperature of fractionation cutting, wherein the cutting temperature of fractionation cutting is not higher than 600DEG C; extracting and separating the heavy component by using an extraction agent to obtain deasphalted oil; and allowing the deasphalted oil and the first component to contact with a hydrogenation catalyst under hydrotreatment conditions. The method effectively improves the quantity of a hydrogenation raw material, increases the yield of each of naphtha and diesel, and can realize the comprehensive utilization of the coal tar. The method also can effectively reduce the amount of coke formed on the surface of the hydrogenation catalyst, prolongs the service life of the hydrogenation catalyst, allows a hydrogenation apparatus to stably run for a long time and naphtha and diesel oil with low sulfur and nitrogen content to be obtained even hydrotreating in a fixed bed reactor, and the obtained diesel has high cetane number.

The invention discloses a system and a method for treating pulverized coal and biomass. The system comprises a biomass pyrolysis unit, an oil gas separation unit, a PSA (pressure swing adsorption) absorption unit, a pulverized coal hydrogasification unit and a calcium carbide smelting unit, wherein the biomass pyrolysis unit comprises a biomass inlet, a pyrolysis oil gas outlet and a biomass char outlet; the oil gas separation unit comprises a pyrolysis oil gas inlet, a pyrolysis oil outlet and a pyrolysis gas 1 outlet; the PSA absorption unit comprises a pyrolysis gas 1 inlet and a pyrolysis gas 2 outlet; the pulverized coal hydrogasification unit comprises a pulverized coal nozzle, pyrolysis gas 2 nozzles, a gasification char residue outlet and an oil gas outlet; the calcium carbide smelting unit comprises a biomass char inlet, a gasification char residue inlet, a powdery quick lime inlet, oxygen nozzles, a calcium carbide furnace gas outlet and a calcium carbide outlet. The pyrolysis gas is taken as a hydrogen source for hydrogasification, meanwhile, produced biomass char and gasification char residues obtained through hydrogasification are used for producing calcium carbide, system energy efficiency is improved, and quality-divided gradient utilization of biomass and coal is realized.

The invention discloses a double-phase hydrogenating method. In the double-phase hydrogenating method, recycle hydrogen and a recycle hydrogen compressor are omitted, hydrogen is mixed with fresh raw oil and a part of recycle oil under the action of solvent or diluent to form mixture flow, the mixture flow enters a reactor and contacts with catalyst, after the rest recycle oil and the hydrogen gas are mixed to discharge gas, the gas in one channel or branches enters the reactor from catalyst bed layers of the reactor, the solvent or diluent is mixed with hydrogen gas to discharge gas, and the gas in one channel or branches enters the reactor from the catalyst bed layers of the reactor. Reaction effluence is subjected to liquid gas separation, liquid phase is further separated to obtain solvent or diluents for recycling, and a part of separated liquid products is utilized as products and the other part of separated liquid products is utilized as recycle oil.

The invention discloses a hydrogenation processing method of Fischer-Tropsch synthetic oil and the method is that the Fischer-Tropsch synthetic oil is divided into lightweight cut and heavyweight cut which are mixed with synthetic wax after prerefining and then are subjected to hydrogenation processing; the products of the hydrogenation processing enter a first high-pressure separator and the liquid products separated enter a fractionating system through a low-pressure separator; the separated hydrogen-rich gas is mixed with heavy component separated from the fractionating system and then is subjected to hydrogen cracking; cracking products enter a second high-pressure separator and the separated liquid products enter the same low-pressure separator and fractionating system with the hydrogenation processing; the separated hydrogen-rich gas is pressurized by a circulating hydrogen compressor and is mixed with new supplementary hydrogen and then enters a hydrogen preprocessing reactor. Cetane value of diesel oil acquired is higher than 70, solidifying point is below 0 DEG C and the content of sulfur and nitrogen is extremely low, meanwhile, naphtha acquired is high-quality raw material used for producing ethylene by steam cracking.

The invention relates to a hydrogen cracking method of Fischer-Tropsch synthetic oil, which divides Fischer-Tropsch synthetic oil cut into light component and heavy component, wherein, the light is subjected to moderate hydrogenation processing; hydrogenation processing products and the heavy component are subjected to a second hydrogenation processing, products of which undergo separation and the separated tail oil is treated with hydrogen cracking, products of which and the products of the second hydrogenation processing enter a same separation system. Cetane value of diesel oil acquired from fractionation of liquid phase by employing the method of the invention is higher than 70, solidifying point is below 0 DEG C and content of sulfur and nitrogen is extremely low; therefore, the diesel oil acquired can produce 0 model high-quality clean diesel oil and can also serve as high-quality harmonic component to promote the cetane value of diesel oil; meanwhile, the naphtha acquired is high-quality raw material used for producing ethylene by steam cracking.

The invention discloses a combined method for producing lubricant base oil and environment-friendly aromatic hydrocarbon oil. API I lubricant base oil with very low polycyclic aromatic hydrocarbon content produced by three old processes is subjected to solvent extraction, and the extraction depth is controlled, so that aromatic hydrocarbon in raffinate oil is further reduced; then through hydrofining and hydro-upgrading, the color and stability are improved, the viscosity index is increased, and the indexes of API III type lubricant base oil are reached; meanwhile, the aromatic hydrocarbon isenriched into the extract oil, so that the content of polycyclic aromatic hydrocarbon (3.0%, aromatic hydrocarbon content) in the extract oil is 20%, and the excellent rubber filling oil for the tireindustry is obtained. According to the method disclosed by the invention, two products with high additional values can be obtained at the same time by modifying the base oil I; and the method has theadvantages of high target product yield, low operation cost and no waste treatment in the processing process.

The invention discloses a preparation method of a hydrofining catalyst for high-activity coker gasoline. The preparation method is characterized in that the hydrofining catalyst is prepared by one-time co-impregnation roasting of a TiO2-Al2O3 carrier and an impregnating solution; the carrier employs a TiO2-Al2O3 composite carrier; the impregnating solution contains elements of Mo, Ni, W, Co, P and Mg, and additives; after impregnation roasting, a Mo-Ni-W-Co-Mg-P / TiO2-Al2O3 hydrotreating catalyst with specific surface area of 150-250 m<2> / g, pore volume of 0.3-0.8 ml / g, pore size of 6-11 nm and strength higher than 120 N / cm is obtained. The TiO2, MgO and additives added in the hydrotreating catalyst can enhance dispersion and stability of the active metal elements, so that the catalyst gains high hydrogenation activity, enables the coker gasoline to carry out hydrofining at lower reaction temperature, slows the rate of coking and has good desulfurization and denitrification effects.