31results about "Refining with oxygen compounds" patented technology

The present application relates to the technical field of fuel desulfurization, and particularly relates to a photo-thermal extraction catalytic oxidation desulfurization catalyst, a preparation method and application thereof. The raw material of the catalyst comprises [Mo6O 19 ](NC 18 H 36 )2, NH2-MIL-125(Ti) and g-C3N4, and the catalyst Mo6 / NH2-MIL-125(Ti) / g-C3N4 is prepared by using an evaporation solvent method, wherein the molar ratio of Ti in NH2-MIL-125(Ti) to Mo in [Mo6O 19 ](NC 18 H 36 )2 is 1:0.1-1.0. The evaporation solvent method used in the present application has simple preparation process, controllable morphology and high stability, and the prepared catalyst has excellent catalytic effect in a photo-thermal extraction catalytic oxidation desulfurization system, and can be widely used for industrial desulfurization of sulfur-containing fuels.

The invention relates to a process for treating biomass oil comprising: (a) a step of supplying biomass oil selected from biomass pyrolysis oil, biomass hydrothermal liquefaction oil, lignin oil, and mixtures thereof; (b) a step of oxidizing the biomass oil supplied in step (a) in the presence of an oxidizing agent at a temperature of 90 °C or lower, this step producing an effluent containing at least partially oxidized biomass oil and water; (c) a step of distilling the effluent from step (b) under reduced pressure, separating a distillate containing water from a residue under vacuum to form a stabilized biomass oil with a reduced water content. Figure 1

The invention relates to the field of oxidative desulfurization of oil and sulfur-containing liquid hydrocarbon fuels (including diesel fuel) and can be used to reduce harmful emissions and exhausts (in the form of sulphur oxide and carbon monoxide - SO2 and CO) of oil refineries, as well as various industrial enterprises (including energy), facilities and engines using hydrocarbon fuels. Method of oxidative desulfurization of oil and liquid hydrocarbon fuel and reducing harmful emissions of sulfur oxides and carbon provides a process of oxidation in tanks or pipelines by ozone (O3) or ozone-containing gases, in which sulfur oxides (SO2 and SO), without releasing them into the atmosphere, mix in a closed vessel or pipeline with carbon monoxide (CO) and by means of chemical reactions of sulfur monoxide decomposition (2SO↑ → SO2↑+S↓) and sulfur recovery (SO2↑ + 2CO↑ → S↓ + 2CO2↑) elemental sulfur (S) is extracted from oil or liquid hydrocarbon fuel and carbon monoxide (CO) is converted into its dioxide (CO2). The oxidation, also decomposition and recovery reactions are carried out one-step or sequentially, in the presence of oxidation-recovery group catalysts corresponding to these reactions, such as tert-Butyl hydroperoxide (C₄H₁₀O₂). Ozonized atmospheric air is used as ozone-containing gas.

Aqueous treatment compositions for crude oil and / or petroleum distillates to remove sulfur compounds therefrom and treatment methods using such compositions are disclosed. The composition has less than 0.5% wt / wt di- or tri-benzohydroxy compound, a strong base, less than 1% wt / wt divalent metal gluconate, a balance of water, and a pH that is 9 or greater. The treatment method includes adding said treatment composition to crude oil or a petroleum distillate to form a mixture having 0.001% to 0.02% wt di- or tri-benzohydroxy compound / wt oil and 0.001% to 0.03% wt divalent metal gluconate / wt oil and mixing the same together.

The present invention is directed to a method of selectively reacting and removing disulfides and reducing corrosivity in petroleum matrixes with an acid wash composition.

The invention relates to a preparation method and application of a hydroxylated boron nitride loaded high-entropy metal catalyst, and belongs to the technical field of fuel green refining and clean fuels, the preparation method comprises the following steps: S1, boron nitride powder is treated by a hydrogen peroxide solution and subjected to a high-temperature hydrothermal reaction, surface hydroxylation modification is realized, and a hydroxyl functional group is introduced; s2, the hydroxylated boron nitride is in contact with a high-entropy precursor solution composed of at least five different metal salts, and a uniformly-distributed multi-metal compound precursor is formed; and S3, calcining the precursor, and converting the precursor into superfine high-entropy metal nanoparticles dispersed on the surface of boron nitride to obtain the composite catalyst. According to the preparation method and application of the hydroxylated boron nitride loaded high-entropy metal catalyst, the composite catalyst prepared by adopting the preparation method can realize deep desulfurization and denitrification at 110-130 DEG C in an air or oxygen atmosphere, high-temperature and high-pressure conditions are not needed, and the advantage of high catalytic efficiency under a mild condition is achieved.

A method of preparing graphene from coal can include thermally processing raw coal and, after the coal has been at least partially cooled from thermal processing, forming reduced graphene oxide from the coal.

The invention belongs to the technical field of desulfurization catalysts, and particularly relates to an oxygen vacancy-rich molybdenum-based desulfurization catalyst as well as a preparation method and application thereof. According to the molybdenum-based desulfurization catalyst rich in oxygen vacancies, cerium dioxide is used as a carrier, molybdenum trioxide is used as an active component, and the carrier and the active component are connected through Mo-O-Ce bonds to form a uniform cerium-molybdenum composite oxide MoO3 / CeO2. The catalyst comprises the following components in parts by weight: 0.79 to 0.81 part of cerium dioxide and 0.15 to 0.35 part of molybdenum trioxide. The oxygen vacancy enrichment means that the relative content of oxygen vacancies is at. 25%-35 at.%. According to the molybdenum-based desulfurization catalyst rich in oxygen vacancies, the 35-min desulfurization rate can reach 100% under the conditions that the temperature is 60 DEG C and the oxygen-sulfur ratio is 5. The desulfurization rate of the molybdenum-based desulfurization catalyst rich in oxygen vacancies can reach up to 90.63% after the reaction is performed for 1 h and 9 times of circulation.

A process for the cracking of a carbon-containing feedstock to produce olefins, aromatics and / or aliphatic includes contacting, in a reactor system, the carbon-containing feedstock with oxygen gas in the presence of a molten salt matrix consisting of a eutectic mixture of alkali metal carbonates, alkali metal hydroxides, alkali metal nitrates, alkali metal halides, alkaline earth metal carbonates, alkaline earth metal hydroxides, alkali earth nitrates, alkaline earth metal halides, rare earth metal carbonates, transition metal carbonates, transition metal hydroxides, transition metal nitrates, transition metal halides, or a mixture of any two or more thereof, to generate an olefin-containing product stream; and collecting an olefin from the olefin-containing product stream; wherein the oxygen is fed with the carbon-containing feedstock in a gas stream comprising from greater than 0 wt % to about 21 wt % oxygen in an inert gas; and the process is conducted in the absence of a catalyst

To solve the problem that although, in a conventional method, it is shown that hydrogen sulfide in petroleum is reduced, a faster, more effective, more cost-efficient, and more environmentally friendly method is required for removing sulfur compounds including removing not only hydrogen sulfide but also mercaptans from crude oil and petroleum distillates.SOLUTION: An aqueous treatment composition for crude oil and / or petroleum distillates for removing sulfur compounds from crude oil and / or petroleum distillates, and a treatment method using the composition are disclosed. The composition comprises less than 0.5 mass% of a di- or tri-benzohydroxy compound, a strong base, less than 1 mass% of a divalent metal gluconate, and a balance of water, and has a pH of 9 or greater. The treatment method comprises adding the treatment composition to crude oil or petroleum distillates to form a mixture having 0.001-0.02 mass% of a di- or tri-benzohydroxy compound in petroleum and 0.001-0.03 mass% of a divalent metal gluconate in the petroleum, and mixing the components together.SELECTED DRAWING: Figure 1

The application relates to preparation of a novel supported polyacid-based ionic liquid and application of the novel supported polyacid-based ionic liquid in fuel desulfurization oxidation desulfurization. 12 O 40 ]·21H2O (K4VW 12 ) as an active center, a CNT@C4VW 12 novel composite material is synthesized by a one-step method. The carbon nanotube is a good electron transmission carrier, has strong stability and adsorption capacity, (C4MIM)Br is used as a linker, is combined with the carbon nanotube through pi-pi stacking on one hand, and is anchored to K4VW 12 on the other hand through electrostatic interaction. The catalyst prepared in the application is prepared through the synergistic effect of three components, greatly reduces the dosage of the active center K4VW 12 , is a heterogeneous catalyst, can realize removal of aromatic sulfides in fuel oil without an extractant, at a lower temperature and in a shorter time. Meanwhile, the system does not use any extractant, is convenient to recover, has good recycling performance, is easy to operate and can meet the demand of green chemical processes.

The present invention relates to a process for the oxidative desulfurization of at least one heavy fuel oil, employing a catalyst in the form of platelets having a two-dimensional hexagonal ordered mesoporous structure, and to the use of such a catalyst in the form of platelets having a two-dimensional hexagonal ordered mesoporous structure, for the oxidative desulfurization of at least one heavy fuel oil. Figure for the abstract: Fig. 1

The present disclosure relates to a method for refining pyrolysis oil, a refined pyrolysis oil obtained by the method, and the use of the refined pyrolysis oil in steam cracking or partial oxidation. The method comprises the steps (i) subjecting crude pyrolysis oil containing hydrocarbons and impurities to a separating operation and thereby forming refined pyrolysis oil and waste liquid, and (ii) subjecting the waste liquid to advanced oxidation treatment and filtering the treated waste liquid, wherein the separating operation comprises using a washing solution to wash the crude pyrolysis oil, the washing solution being an aqueous solution of a transition metal compound or an aluminum compound.

The present application relates to the technical field of adaptive parameter control processing, and specifically discloses an adaptive parameter control system for ozone deodorization, which continuously collects the ozone inlet concentration, ozone outlet concentration, oil phase feed flow, ozone inlet flow, pressure difference between the bottom and top of the reaction tower, and reaction temperature in the gas-liquid reaction tower; according to the collected data, the gas-liquid exchange activity value is estimated by alternately executing state recursion and observation correction; the activity estimation value is compared with the initial activity value to calculate the activity decay percentage, a feedforward compensation enable signal is generated when the threshold value is reached, the correction coefficient is calculated according to the current activity estimation value, target dissolution efficiency and current dissolution efficiency, the corrected ozone inlet flow set value is obtained and the flow is adjusted; the actual ozone inlet flow and newly collected ozone outlet concentration are fed back to the state estimation; the present application can avoid reverse regulation errors caused by mass transfer efficiency decay and stabilize the deodorization effect.

The invention discloses a method for preparing waste grease-based vegetable insulating oil through manganese catalytic oxidation decolorization, which comprises the following steps: by taking a complex formed by manganese salt and 2, 2 '-bipyridine derivative as a catalyst and taking a urea hydrogen peroxide compound as an oxidant, carrying out selective catalytic oxidation on pigment molecules in waste grease under mild conditions, thereby obtaining the waste grease-based vegetable insulating oil. The decolorization rate can reach 85%-92%; a small amount of activated clay is subsequently used for adsorbing and removing the residual metal catalyst and trace oxidation byproducts, and the high-quality vegetable insulating oil with various physicochemical indexes meeting the requirements can be obtained. The use amount of the urea hydrogen peroxide compound used in the method is small, compared with direct use of high-concentration hydrogen peroxide, the stability is higher, the oxidability is milder and more controllable, and the problems of grease emulsification, acid value increase, non-selective oxidation and the like caused by excessive hydrogen peroxide are effectively avoided. The method is mild in reaction condition, high in selectivity, low in catalyst and auxiliary material consumption and suitable for industrial production of the high-quality vegetable insulating oil.

The invention discloses a heterojunction photocatalytic material as well as preparation and application thereof. The material comprises a heterostructure formed by compounding sulfur-doped carbon nitride in a porous nanosheet shape and BiVO4 in a nano-particle shape. The preparation method comprises the following steps: uniformly mixing powdered sulfur and urea, and performing thermal polymerization reaction to obtain sulfur-doped carbon nitride; under the stirring condition, dropwise adding the bismuth salt aqueous solution into the ammonium metavanadate aqueous solution to obtain a mixed solution, adjusting the pH to be acidic, and performing heating reaction to obtain BiVO4 powder; the sulfur-doped carbon nitride and BiVO4 powder are fully and uniformly mixed and then calcined, and the heterojunction photocatalytic material is obtained. The light absorption range of the catalyst can be expanded, photo-induced electron-hole recombination is inhibited, meanwhile, air is adopted as an oxidizing agent, harmful reagents do not need to be additionally added, photocatalytic performance and environment-friendly economy are both considered, the defects that an existing desulfurization technology is low in efficiency, high in energy consumption and large in pollution are overcome, and the method is suitable for industrial production. And a feasible technical path is provided for deep desulfurization of fuel oil.

The invention discloses a potassium-doped carbon nitride and silver phosphate heterojunction photocatalytic material as well as preparation and application thereof. The material comprises nano-sheet potassium-doped carbon nitride and silver phosphate particles deposited on a potassium-doped carbon nitride sheet layer, and the potassium-doped carbon nitride and the silver phosphate particles form a heterojunction structure. The preparation method comprises the following steps: calcining a mixed solid of organic amine and a potassium source to obtain potassium-doped carbon nitride; dispersing potassium-doped carbon nitride in water to obtain a first suspension, adding an Ag < + > solution into the first suspension to obtain a second suspension, adding a phosphate solution into the second suspension, and reacting to obtain a first product; and centrifuging the first product to obtain a precipitate, washing and drying to obtain the K-C3N4 / Ag3PO4 heterojunction material. The photocatalytic oxidation desulfurization conversion rate of the material can reach 90% or above, and the material has excellent oxidative degradation capacity on sulfides such as DBT which are difficult to remove through traditional hydrodesulfurization and can meet the strict standard of deep desulfurization of fuel oil.

A process for the cracking of a carbon-containing feedstock to produce olefins, aromatics and / or aliphatic includes contacting, in a reactor system, the carbon-containing feedstock with oxygen gas in the presence of a molten salt matrix consisting of a eutectic mixture of alkali metal carbonates, alkali metal hydroxides, alkali metal nitrates, alkali metal halides, alkaline earth metal carbonates, alkaline earth metal hydroxides, alkali earth nitrates, alkaline earth metal halides, rare earth metal carbonates, transition metal carbonates, transition metal hydroxides, transition metal nitrates, transition metal halides, or a mixture of any two or more thereof, to generate an olefin-containing product stream; and collecting an olefin from the olefin-containing product stream; wherein the oxygen is fed with the carbon-containing feedstock in a gas stream comprising from greater than 0 wt% to about 21 wt% oxygen in an inert gas; and the process is conducted in the absence of a catalyst

The invention discloses a Fe / Ni co-doped W18O49 oxidative desulfurization catalyst as well as a preparation method and application thereof, and belongs to the technical field of oil product oxidative desulfurization catalytic materials. The preparation method comprises the following steps: dissolving a tungsten source in an alcohol solvent to obtain a solution A; adding an iron source and a nickel source into the solution A, and stirring to obtain a precursor mixed solution; and carrying out solvothermal reaction, suction filtration, washing and drying to obtain the Fe / Ni co-doped W18O49 oxidative desulfurization catalyst. The molar ratio of the Fe element in the iron source to the Ni element in the nickel source is (1: 0.1)-(1: 0.9), under the specific molar ratio, the Fe element in the iron source and the Ni element in the nickel source generate a synergistic catalytic effect in a W18O49 matrix, the electronic structure of the catalyst is optimized, the activation efficiency of the active site of the catalyst on an oxidizing agent H2O2 is improved, the adsorption capacity on sulfide molecules such as DBT is also enhanced, and the catalytic activity of the catalyst is improved. The oxidation reaction kinetics is accelerated, and the desulfurization performance is excellent.

A process is disclosed for removing sulfides from liquid fossil fuel comprising mixing the liquid fossil fuel with an oxidizer and catalyst to form a multiphase reaction medium and producing a fluid flow of the multiphase reaction medium. Ultra sound may be applied to the multiphase reaction medium to cause oxidation of sulfides in the liquid fossil fuel to sulfones; and extracting the sulfones to yield an organic phase and aqueous phase. The ultra sound is performed by generating vibrations parallel to the fluid flow of the multiphase reaction medium. The organic phase substantially consists of desulfurized fuel.

The invention discloses a macroporous ZSM-5 molecular sieve loaded heteropolyacid desulfurization catalyst as well as preparation and application thereof, and belongs to the technical field of light fuel oil desulfurization. The method comprises the following steps: adding sodium metavanadate dihydrate, sodium dihydrogen phosphate hydrate and sodium molybdate dihydrate as raw materials into an aqueous solution, adjusting the pH value to about 4, refluxing for 8 hours, cooling, extracting with diethyl ether to obtain vanadium-substituted Dawson type heteropolyacid, and adjusting the material ratio to obtain different amounts of vanadium-substituted heteropolyacid. Then, the supported catalyst POM-CNTs (at) MOF-199-ZSM-5 is prepared through a one-pot method, and the obtained catalyst is applied to oxidative desulfurization of a light fuel simulation system. Oxygen in air is used as an oxidizing agent, and the thiophene removal rate can reach 98.90% after 2.5 h at 70 DEG C.

This invention proposes a rare-earth-doped phosphotungstic acid (PPA) structural catalyst, its preparation method, and its application. The preparation method includes: preparing rare-earth La and / or Ce-modified PPA active components via ion exchange; using monolithic 3D stainless steel metal fibers as a structural carrier; cutting and winding stainless steel θ-ring packing materials, mimicking the structure of θ-ring packing materials used in distillation, into a θ-ring-like hollow structure to obtain a 3D stainless steel metal fiber θ-ring packing; and then loading the rare-earth La and / or Ce-modified PPA active components onto the 3D stainless steel metal fiber θ-ring packing using a sol-gel / impregnation method to obtain the rare-earth La and / or Ce-doped PPA structural catalyst. The rare-earth-doped PPA structural catalyst prepared by this invention can be applied to chemical process intensification technologies such as reactive distillation to improve the conversion efficiency of biodiesel and oxidative desulfurization.

Disclosed herein is Method for selective oxidative desulfurization in oil and product thereof, which belongs to the field of energy and chemical engineering. This method operates in a polar phase composed of water and acetonitrile, through the direct oxidation of peroxide organic acids and the activation of the catalyst on the peroxide organic acids to produce active substances, for the selective removal of organic sulfides in the non-polar phase oil solution. In the polar phase, peroxide acetic acid is used as the oxidant, and low-valent transition metals are used as catalysts to activate peroxide acetic acid to produce active substances to achieve the oxidation and removal of organic sulfur in the non-polar phase.

The invention discloses a V-Co-Mo three-metal catalyst, a preparation method and application of the V-Co-Mo three-metal catalyst in low-temperature oxidative desulfurization of fuel oil, the V-Co-Mo three-metal catalyst takes mesoporous gamma-Al2O3 or a mesoporous silicon-based material SBA-15 as a carrier to load metals V, Co and Mo, the preparation method is simple, the oxidative desulfurization temperature is low, and when the V-Co-Mo three-metal catalyst is applied to the low-temperature oxidative desulfurization of the fuel oil, the V-Co-Mo three-metal catalyst can be applied to the low-temperature oxidative desulfurization of the fuel oil. A small amount of an auxiliary agent isobutyraldehyde is added into an oxidation system, so that the activation of oxygen is more facilitated, finally, a deep desulfurization effect is achieved under a low-temperature condition close to normal temperature, thiophene sulfides in fuel oil are oxidized into corresponding sulfone substances, and the oxidation efficiency is improved. And then isobutyraldehyde and sulfone substances are extracted and separated from the fuel oil by using an extracting agent to obtain the low-sulfur fuel oil, so that the stability of an oil product and the safety of a production process are facilitated.

A pyrolysis oil is contacted with a hydrocracking catalyst to convert at least a portion of the pyrolysis oil into a hydrocracking product stream comprising a lower alkane and residual hydrogen. An oxidative dehydrogenation (ODH) feed stream comprising ethane is contacted with an ODH catalyst to convert at least a portion of the ODH feed stream to produce an ODH product stream comprising ethylene and residual oxygen. At least a portion of the hydrocracking product stream is combined with at least a portion of the ODH product stream to produce a mixed stream. The residual hydrogen from the portion of the hydrocracking product stream reduces at least a portion of the mixed stream, or the residual oxygen from the portion of the ODH product stream oxidizes at least a portion of the mixed stream. An ethylene stream and a liquefied petroleum gas (LPG) stream are separated from the mixed stream.

The invention belongs to the technical field of extraction separation, and discloses a composite material for extracting and removing thiophene as well as a preparation method and application of the composite material. According to the method, the deep eutectic solvent is loaded on the phosphorus-doped carbon nitride, and the thiophene sulfide in the fuel oil is synergistically removed by utilizing the extraction of the deep eutectic solvent and the adsorption of the phosphorus-doped carbon nitride. According to the method, the three modes of extraction, oxidation and adsorption are used for synergic desulfurization, the operation conditions are mild, the desulfurization efficiency is high, the defect that the deep eutectic solvent is inconvenient to transport and store in industry is overcome, and the thiophene removal efficiency close to 99.9% is achieved.

The invention discloses an oil slurry deep desulfurization method based on ozone-organic acid synergistic oxidation. The method comprises the following steps: mixing oil slurry and organic acid according to a ratio, and introducing ozone gas into a system to carry out catalytic oxidation reaction under a mild condition of 50-90 DEG C aiming at benzo-naphthothiophene sulfides which are difficult to remove in high-sulfur-content catalytic cracking oil slurry (the sulfur content is 7000-30000 mu g / g). According to the invention, a reaction path of'ozone-organic acid synergistic oxidation-direct escape of sulfur dioxide 'is constructed, so that the sulfur element in the sulfide is converted into SO2 gas to be separated from the oil phase, thereby avoiding the oil phase loss caused by generation of macromolecular sulfone compounds in the traditional oxidative desulfurization process. According to the method, the sulfur content of the oil slurry can be deeply removed to be lower than 5000 micrograms / g, the harsh standard of needle coke raw materials is met, and meanwhile the method has the remarkable advantages of being high in oil slurry yield, mild in reaction condition, free of follow-up extraction, safe to operate and low in carbon emission.

The invention discloses a sodium-doped carbon nitride cerium dioxide heterojunction photocatalytic material as well as preparation and application thereof. The photocatalytic material comprises lamellar sodium-doped carbon nitride and CeO2 spherical particles dispersed on the surface of the lamellar sodium-doped carbon nitride, and the sodium-doped carbon nitride and CeO2 form a heterojunction. The preparation method comprises the following steps: uniformly mixing organic amine and a sodium source, calcining, and washing to obtain sodium-doped carbon nitride; dispersing sodium-doped carbon nitride and CeO2 in the liquid, and fully mixing to obtain a suspension; and centrifuging the suspension, taking the precipitate, and drying to obtain the heterojunction photocatalytic material. According to the invention, through the heterojunction formed by sodium-doped carbon nitride and CeO2 nanoparticles, the transfer of photon-generated carriers is promoted, the utilization rate of sunlight is improved, the photocatalytic oxidation desulfurization performance of the photocatalytic material is synergistically improved, and the photocatalyst can be applied to the efficient degradation of thiophene sulfides difficult to remove in fuel oil.

The invention belongs to the field of heterogeneous catalysis, and discloses a preparation method and application of a two-dimensional flaky MOF material containing variable valence transition metal. The preparation method comprises the following steps: mixing a solution of a variable valence transition metal source of a vanadium source, a molybdenum source, an iron source or a cerium source with a solution containing imidazole organic ligands, and then reacting by a temperature-controlled solvothermal method to obtain M-MOF-T. Precise regulation and control of the mixed valence state of metal ions are achieved by regulating and controlling the solvothermal temperature, a vanadium-based MOF product forms a high-crystallinity two-dimensional sheet structure, and other metal-based MOF products all have highly-dispersed mixed valence state active centers. The catalyst shows excellent catalytic activity and selectivity on sulfur-containing compounds such as DBT, 4-MDBT and the like in fuel oil in a system taking ionic liquid [Bmim] BF as an extraction / reaction medium, the desulfurization rate of the vanadium-based catalyst on the DBT within 30 minutes reaches 100%, and the desulfurization rates of the molybdenum-based catalyst, the iron-based catalyst and the cerium-based catalyst exceed 78%; the reaction conditions are mild, the catalyst and the ionic liquid can be synchronously recycled, the process is simple, efficient and environment-friendly, and the industrial application potential is remarkable.