62 results about "Vanadium Compounds" patented technology

The invention relates to the technical field of catalysts for synthesizing ethylene propylene rubber, and discloses a vanadium-based catalyst composition and a preparation method and application thereof.The vanadium-based catalyst composition comprises a vanadium catalyst, an organic aluminum compound and an activation accelerant, and the preparation method of the vanadium catalyst comprises the steps that a salicylaldehyde compound is dissolved with methyl alcohol or ethyl alcohol; and adding an organic amine compound while stirring, adding a vanadium compound after reaction, and continuously reacting to obtain the vanadium catalyst. When the prepared vanadium catalyst composition is applied to ethylene and propylene copolymerization reaction, the reactivity rate of ethylene and propylene monomers can be adjusted according to the structure of the vanadium catalyst, the C3 content of the prepared ethylene propylene rubber is 26.2-36.4 wt%, the double bond content of ethylene propylene diene monomer is adjustable in the range of 3.7-15.2 wt%, and post-processing application is facilitated.

[Problem] To further improve thermal yellowing resistance of a coating layer even when the coating layer contains a vanadium compound. [Solution] The surface-treated steel sheet according to the present invention has a base steel sheet, a Zn-Al-Mg-containing plating layer, a primer coating layer containing at least a vanadium compound, and an upper coating layer, and wherein: in the results of analysis of the primer coating layer by GDS, the content of the Zn-Al-Mg-containing plating layer is less than the content of the Zn-Al-Mg-containing plating layer; the strength of vanadium at the interface on the upper layer coating layer side of the primer coating layer is 50% or less with respect to the maximum strength of vanadium in the primer coating layer, and in the range from the interface on the Zn-Al-Mg-containing plating layer side of the primer coating layer to 1 [mu] m toward the upper layer coating layer side. The average strength of vanadium is at least a predetermined ratio with respect to the average strength of magnesium, the average strength of aluminum, and the average strength of zinc.

The invention relates to the technical field of laser metallurgy, in particular to a method for preparing low-valence vanadium oxide through laser irradiation. The method for preparing the low-valence vanadium oxide through laser irradiation comprises the following steps that a high-valence vanadium compound and a carbonaceous reducing agent are mixed and subjected to a reduction reaction under the laser irradiation condition, and the low-valence vanadium oxide is obtained. The low-valence vanadium oxide prepared by the laser irradiation method provided by the invention is high in vanadium content and low in comprehensive valence state of vanadium, in addition, the reaction time is short, the efficiency is high, the energy consumption is low, and the carbon emission is small; compared with a traditional reduction roasting method, the temperature rise and heat preservation requirements of a reduction roasting furnace do not need to be strictly limited.

The present invention belongs to the field of chemical engineering. Disclosed are an acrylonitrile catalyst, and a preparation method therefor and the use thereof. The preparation method comprises: (1) mixing solutions of a molybdenum compound and a bismuth compound at an Mo / Bi molar ratio of 0.5-1.5 to prepare bismuth molybdate containing an α-phase and / or a γ-phase; (2) synthesizing a pentasil-type molecular sieve having an Si / V molar ratio of 50-150 from a silicon source, an organic amine, and a vanadium compound; (3) mixing a silica sol with a molybdenum compound solution at an Si / Mo molar ratio of 0.5-1, then sequentially adding solutions of a nickel, a tungsten, and a thallium compound, and phosphoric acid, the molecular sieve, and the bismuth molybdate thereto, such that the ratio of the weight percentages of Mo, Bi, Ni, W, Tl, V, and P in the catalyst, on the basis of oxides, is (37-38):(4-6):(3-5):(2-3):(0.2-0.3):(0.1-0.3):(0.7-0.8); (4) adding SiO2 powder thereto, such that SiO2 accounts for 45 wt% to 55 wt% of the catalyst; and (5) pulping and homogenizing the resulting mixture, then spray molding same at an outlet temperature of 150-180°C, and calcining same in an air atmosphere at 550-680°C for 1-6 h. The catalyst has a good activity, selectivity and stability, and is wear-resistant.

The present invention provides lithium vanadium phosphate which is a single phase as seen in X-ray diffraction, particularly useful as a positive electrode active material for a lithium secondary battery or the like, by an industrially advantageous method. The present invention is a method for producing lithium vanadium phosphate having a sodium superion conductor (NASICON) structure, the method being characterized by comprising: a first step for preparing a mixed slurry by mixing a tetravalent or pentavalent vanadium compound, a phosphorus source, and a reducing sugar in an aqueous solvent; a second step in which the mixed slurry is heated and solubilized; a third step of adding a lithium source to the solution to prepare a raw material mixed solution; a fourth step for obtaining a reaction precursor by spray-drying the raw material mixed solution; and a fifth step in which the reaction precursor is subsequently fired at 500-1300 DEG C in an inert gas atmosphere or a reducing atmosphere.

The application relates to a high-purity VOSO4 electrolyte preparation method and relates to the technical field of vanadium compound production. The short-process technology of medium-temperature ignition, low-temperature chlorination, rectification and acidification reduction is used to efficiently extract vanadium from vanadium-containing stone coal, and the technical effect of low energy consumption and almost no pollution is realized; the process also has the characteristics of simple separation method, no need of complex extraction, high product purity, good electrolyte performance and the like, and has the advantages of short process, low energy consumption and near-zero pollution, and opens up a new way for clean production of vanadium resources.

The present invention relates to a method for preparing a nanometer sodium vanadium phosphate material, comprising the following preparation steps: 1) weighing raw materials, the raw materials consisting of a tetravalent vanadium compound, a sodium phosphate salt and sodium fluoride, or the raw materials consisting of a tetravalent vanadium compound and a sodium phosphate salt; and 2) placing the raw materials in a high-speed homogenizing mill to complete a rapid nucleation process and control a crystal growth process. The present invention takes use of the principle of atom economy, and uses the milling device having a high power and a high rotation speed to perform efficient preparation of the nanometer sodium vanadium phosphate. The present invention achieves efficient atom utilization of the raw materials, and avoids generation of unnecessary waste materials and waste of the raw materials, which omits waste liquid treatment steps involved in solvent emission and washing processes, thereby achieving green preparation. On the basis of the milling device having a high power and a high rotation speed, high-speed collision is achieved to accelerate the reaction and to efficiently control the particle size of the product, thereby achieving nano-scale preparation. The present invention has the advantages of simple operation, high efficiency, easy industrial scale-up production and the like and helps to promote the research, popularization and application of the sodium vanadium phosphate material in the field of electrochemical energy storage.

To provide a method for producing DFF that is capable of easily producing DFF in a one-pot manner from saccharides without the need for a specific catalyst such as a vanadium compound.SOLUTION: A method for producing 2,5-diformylfuran comprising a heating step of heating saccharides in the presence of a sulfoxide compound and a halide salt to react the saccharides, thereby generating 2,5-diformylfuran.SELECTED DRAWING: None

The present invention discloses a modified Prussian derivative, its preparation method, and application. The modified Prussian derivative comprises a vanadium compound and a Prussian derivative; the Prussian derivative contains the vanadium compound on its surface and / or within its interior. The modified Prussian derivative of the present invention exhibits good thermal stability, regular morphology, and excellent electrochemical performance. By coating and doping the Prussian derivative with a vanadium compound, the present invention improves the surface morphology, making the material's morphology more regular. The metal cations in the vanadium compound can quickly enter the crystal lattice of the Prussian derivative, occupying the positions of the original lattice water, reducing structural defects in the material, increasing the integrity of the material's crystal structure, and removing lattice water from internal defects. Furthermore, the vanadium compound coating and doping protects the Prussian derivative, preventing it from hygroscopicity and oxidation, thereby increasing the rate performance of the battery.

The application provides a method for preparing a heterocyclic aromatic amide by hydrolyzing a heterocyclic aromatic nitrile with a vanadium catalyst, and belongs to the technical field of fine chemicals. The method is a new method for preparing a heterocyclic aromatic amide by hydrolyzing a heterocyclic aromatic nitrile as a raw material with a vanadium-based material as a catalyst. The vanadium-based material is prepared by mixing amine groups in an organic amine and vanadium substances in an inorganic vanadium compound at a mass ratio of 1:1-1:6, calcining under the condition of 300-1000 DEG C in an inert atmosphere for 0.5-20 h, and cooling, and can efficiently catalyze the hydrolysis of a heterocyclic aromatic nitrile into a corresponding amide. The method has the advantages of mild reaction conditions, few by-products, and easy separation of the catalyst and the product from the reaction system, and has strong practicability and broad application prospect.

The invention provides a preparation method of a vanadium-phosphorus-oxide catalyst, the vanadium-phosphorus-oxide catalyst and application of the vanadium-phosphorus-oxide catalyst, and relates to the technical field of preparation of maleic anhydride through butane oxidation. The preparation method of the vanadium phosphorus oxide catalyst comprises the following steps: mixing a pentavalent vanadium compound, a pentavalent phosphorus compound, a first cocatalyst and an organic alcohol solution, and reacting to obtain a first precursor; carrying out first-stage calcination on the first precursor in an inert atmosphere or a vacuum condition, and then carrying out second-stage calcination in an oxygen-containing atmosphere to obtain a second precursor; placing the second precursor in a solution containing a second cocatalyst, and carrying out dipping treatment to obtain a third precursor; and mixing the third precursor with a lubricant, carrying out molding treatment, and then carrying out activating treatment to obtain the vanadium phosphorus oxide catalyst. The vanadium phosphorus oxide catalyst prepared by the preparation method of the vanadium phosphorus oxide catalyst has high activity, high selectivity and good stability, and the method is suitable for industrial production.

[Problem] To further improve thermal yellowing resistance of a coating layer even when the coating layer contains a vanadium compound. [Solution] A surface-treated steel sheet according to the present invention has: a Zn-containing plating layer positioned on the surface of a steel sheet serving as a base material; a primer coating layer that is positioned on the Zn-containing plating layer and contains at least a vanadium compound; and an upper coating layer positioned on the primer coating layer, in which the average thickness of the primer coating layer is in the range of 3.0-15.0 [mu] m, the average thickness of the upper coating layer is in the range of 7.0-25.0 [mu] m, the Vickers hardness of the upper coating layer is in the range of 25-70 Hv, the Vickers hardness of the primer coating layer is 20 Hv or less, and the average thickness of the upper coating layer is in the range of 3.0-15.0 [mu] m. The difference between the Vickers hardness of the upper coating layer and the Vickers hardness of the primer coating layer is within the range of 5-50 Hv.

The invention relates to the use of ecologically sustainable catalysts not previously applied in the field of agriculture, and to related methods, by means of which a higher rate of atmospheric nitrogen fixation can be achieved and agriculturally advantageous effects can be realized while simultaneously avoiding the harmful effects associated with conventional nitrogen fertilization. More specifically, the invention relates to the novel agricultural application of dissociated vanadium ions possessing redox potential, and to related methods. The method according to the invention is suitable for increasing the yield and biomass of plants, the essence of which lies in applying vanadium to the plant growth medium, to the plant, or to both, in order to enhance the nitrogen-fixing capability of microorganisms capable of fixing atmospheric nitrogen.

The invention discloses a C6 compound, application and a vanadium removal method, the C6 compound is obtained by reacting olefin and TiCl4 at 120-160 DEG C, the volume ratio of the olefin to the TiCl4 is (15-25): (1-5), and the olefin is alpha-olefin or isoprene with the carbon atom number larger than or equal to 9. The C6 compound has a good vanadium removal effect, does not cause the problem of high carbon content impurities in refined TiCl4, does not generate wall-adhered residues to block equipment in a vanadium removal process, is easy to clean, and has a vanadium removal rate of 99.62%; the recycled C6 compound can be reutilized, namely can be used for recycling vanadium-containing compounds, and can also be used for vanadium removal experiments again after being treated.

The invention relates to a preparation method of a catalyst for preparing acetyl n-propanol through catalytic oxidation of 2-methyltetrahydrofuran, and belongs to the technical field of catalyst preparation. The preparation method specifically comprises the following steps: dissolving a vanadium-containing compound serving as a main component of the catalyst and oxalic acid serving as a pore-forming agent into deionized water; heating and hydrolyzing the solution to completely evaporate water to obtain a solid; and roasting the solid in an air atmosphere to obtain the catalyst. The prepared catalyst is a catalyst for catalyzing molecular oxygen to oxidize 2-methyltetrahydrofuran to prepare acetyl n-propanol, and a new route for preparing acetyl n-propanol is realized.

A method can include: disposing vanadium tetrachloride in a delivery container; delivering the vanadium tetrachloride to a reaction chamber that is in fluid communication with the delivery container; slowing the delivery of decomposition products of the vanadium tetrachloride to the reaction chamber; and / or applying the vanadium tetrachloride to a substrate disposed in the reaction chamber to form a layer including vanadium on the substrate.

The invention relates to the technical field of catalysts, and discloses a preparation method of a vanadium catalyst composition for ethylene propylene rubber, and the vanadium catalyst composition is generated by polymerization reaction of a chlorinated vanadium compound and a dialkyl magnesium compound. The novel vanadium catalyst composition is formed by the chlorinated vanadium compound and the dialkyl magnesium compound in the polymerization process, and the polymerization reaction is performed in situ, so that the electron cloud density of the active center of the vanadium catalyst is improved, and the copolymerization activity and the copolymerization monomer propylene insertion rate are improved; the defects that a traditional carrier catalyst preparation process is complex, not suitable for an existing industrial production device and low in practicability are overcome.

The invention relates to the technical field of chemical purification, in particular to a vanadium pentoxide preparation method and vanadium pentoxide, and the vanadium pentoxide preparation method comprises the following steps: mixing vanadium pentoxide to be purified with a sodium hydroxide solution, and carrying out a liquid-phase oxidation reaction under the condition of introducing oxygen to obtain a first mixed solution; adding calcium oxide to carry out precipitation reaction to obtain calcium sediment, and carrying out ammonium conversion reaction in a carbon dioxide atmosphere to obtain a second mixed solution; adjusting the pH value and carrying out crystallization reaction to obtain ammonium polyvanadate crystals; and carrying out calcination treatment to obtain vanadium pentoxide. According to the method, a sodium hydroxide-oxygen-vanadium pentoxide liquid-phase oxidation system is constructed, and full oxidation and deep conversion of the low-valence vanadium compound are realized by utilizing the synergistic effect of the autocatalytic free radical reaction initiated by oxygen microbubbles and vanadium ions in the low-valence vanadium compound, so that a high-purity vanadium pentoxide product is obtained. The method has the advantages of high oxidation efficiency, obvious impurity removal effect, high yield and the like.

The present application relates to the technical field of vehicles, and specifically discloses a shift method and device for protecting vanadium-based SCR, a vehicle and a storage medium, wherein the shift method for protecting vanadium-based SCR, after determining that a temperature protection condition judgment enabling condition is met, obtains an actual temperature upstream of the SCR, a target temperature of an SCR temperature control model, a change rate of the target temperature, and road condition information in a set region in front of the vehicle; then, whether the temperature protection condition is met is evaluated based on the actual temperature upstream of the SCR, the target temperature, the change rate of the target temperature and the road condition information, and when the temperature protection condition is met, the gear of the vehicle is downshifted, and the SCR temperature is increased through downshifting, thereby preventing the leakage of vanadium-containing compounds. When judging whether the temperature protection condition is met, the shift method for protecting vanadium-based SCR simultaneously refers to the actual temperature upstream of the SCR, the target temperature and the change rate of the target temperature, can objectively reflect the current state of the SCR, and ensures the accuracy of the control result.

The invention relates to a vanadium-containing molecular sieve catalyst for preparing acetyl n-propanol through catalytic oxidation of 2-methyltetrahydrofuran and a preparation method, and belongs to the field of vanadium-containing molecular sieve catalysts for catalytic oxidation of 2-methyltetrahydrofuran. The preparation method specifically comprises the following steps: taking a silicon-aluminum-sodium microporous molecular sieve as a precursor, carrying out ion exchange by adopting an aqueous solution of a vanadium-containing compound, washing with water, drying, and roasting to prepare the vanadium-containing molecular sieve catalyst. The prepared catalyst is a catalyst for catalyzing molecular oxygen to oxidize 2-methyltetrahydrofuran to prepare acetyl n-propanol, and a new route for preparing acetyl n-propanol is realized.

This invention generally relates to paints containing a binder curable by an auto-oxidation mechanism and at least one drying agent comprising a vanadium sulfonate compound of formula (VII), wherein R 1 and R 2 Independently selected from hydrogen, C1-C 12 Alkyl, C1-C 12 Haloalkyl, C6-C 10 Aryl and benzyl; and aryl and benzyl can optionally be independently selected from C1-C. 20 Alkyl and hydroxy (C1-C2) alkyl groups are substituted with up to three substituents.

Providing a metal surface treatment agent capable of high-temperature firing and capable of imparting high corrosion resistance to a metal substrate. A metal surface treatment agent comprising a silicate compound (A); an alkali metal salt (B) other than a silicate compound, other than a vanadium compound, and other than a zirconium compound; a vanadium compound (C); a zirconium compound (D); and water, wherein the silicon element content is 10 mass% or more with respect to the total solid content of the metal surface treatment agent. Preferably, the silicate compound (A) is an alkali metal silicate.

The present invention belongs to the technical field of inorganic pigment production, and particularly relates to a method for in-situ preparation of bismuth vanadate composite pigment. This preparation method involves first dissolving a bismuth compound in an acidic solution, adding a surfactant to dissolve the compound thoroughly, and then adding nickel titanium yellow particles to the mixture. A vanadium compound is then added to the mixture under strong shearing force, and the mixture is allowed to react at a predetermined temperature and pH. The precipitate separated from the mixture is washed, dried, and then heat-treated to obtain a bismuth vanadate composite pigment powder. Under strong shearing force, the synthesis reaction of bismuth vanadate can be carried out uniformly in-situ on the surface of nickel titanium yellow. This method allows for faster and more uniform in-situ synthesis and avoids the need for large amounts of basic solution in conventional methods. The resulting bismuth vanadate composite pigment has high chromaticity, superior hiding power, and tint color intensity. The method of the present invention is green and efficient, achieves uniform reaction, and produces excellent product performance, making it suitable for industrial continuous production.

To provide a positive electrode active material, a manufacturing method for the same, and a positive electrode active material slurry including the same, having high energy density, high operation voltage, and high conductivity.SOLUTION: The present invention relates to a positive electrode active material for a lithium secondary battery, a manufacturing method for the same, a positive electrode active material slurry including the same, and a lithium secondary battery including the same. More specifically included are: forming a mixture by mixing an iron phosphate precursor, a lithium source, a carbon source, and a dopant source; drying the mixture by spray drying; and sintering the dried mixture. The dopant source includes at least one selected from an aluminum compound, a titanium compound, a vanadium compound, and a magnesium compound.SELECTED DRAWING: Figure 6

The application belongs to the field of phosphate inorganic material preparation, and relates to a method for preparing titanium-vanadium doped iron phosphate, which comprises the following steps: adding titanium and / or vanadium compounds into an iron phosphate complex solution to prepare an iron phosphate complex solution containing titanium and / or vanadium doped metal compounds, and then adding water into the mixed solution and heating to obtain titanium and / or vanadium ion doped iron phosphate; the titanium compound is selected from metatitanic acid, nano titanium dioxide, titanyl sulfate, titanyl oxalate, titanium citrate, titanium lactate or titanium tartrate; the vanadium compound is vanadium trioxide, vanadium dioxide (IV), vanadium pentoxide, vanadium monoxide, vanadium sulfate or vanadium trichloride. In addition, alternative solutions of adding sequence and adding timing change are provided. The application has simple process, is suitable for large-scale industrial production, and improves the electrochemical performance of lithium iron phosphate material in a power battery.

The invention provides a method for preparing bimodal / wide molecular weight distribution polyethylene by using a single reactor, which comprises the following steps of: catalyzing ethylene homopolymerization or copolymerization of ethylene and alpha-olefin by using a hydrocarbon solvent as a dispersing agent and using a vanadium polyethylene catalyst and aluminum alkyl as a main catalyst and a cocatalyst respectively, hydrogen is used as a polymer molecular weight regulator in the reaction process; wherein the vanadium polyethylene catalyst comprises a magnesium-containing carrier and a vanadium compound loaded on the magnesium-containing carrier, the total weight of the vanadium polyethylene catalyst is 100%, the mass content of active metal vanadium is not less than 3.8%, the average particle size of the vanadium polyethylene catalyst is 9.0-13.5 [mu] m, and the particle size distribution SPAN value is less than 1. The vanadium polyethylene catalyst used in the invention has higher polymerization activity, and the obtained polymer has higher apparent density and lower fine powder and oligomer, and can be used for developing special resins for high-strength films, pressure-resistant pipes and the like.

Provided is a metal surface treatment agent that enables high-temperature sintering and imparts high corrosion resistance to a metal base material. A metal surface treatment agent contains a silicic acid compound (A), an alkali metal salt other than the silicic acid compound, a vanadium compound, and a zirconium compound, and the content of silicon is 10% by mass or more relative to the total solid content of the metal surface treatment agent. The silicic acid compound (A) is preferably an alkali metal silicate.

The invention belongs to the field of preparation of phosphate inorganic materials, and relates to a method for preparing titanium-vanadium doped iron phosphate, which comprises the following steps: adding a titanium and / or vanadium compound into an iron phosphate complex solution to prepare an iron phosphate complex solution containing a titanium and / or vanadium doped metal compound; adding water into the mixed solution, heating to obtain titanium and / or vanadium ion doped iron phosphate, and the titanium compound is selected from metatitanic acid, nano titanium dioxide, titanyl sulfate, titanyl oxalate, titanium citrate, titanium lactate or titanium tartrate; and the vanadium compound is vanadium trioxide, vanadium dioxide (IV), vanadium pentoxide, vanadium monoxide, vanadyl sulfate or vanadium trichloride. In addition, the invention also provides an alternative scheme for changing the adding sequence and the adding opportunity. The method is simple in process and suitable for large-scale industrial production, and the electrochemical performance of the power battery of the lithium iron phosphate material is improved.

The present invention relates to catalytic compositions and curable compositions containing them; the catalytic compositions of the present invention consist essentially of: (i) a metal compound; and (ii) a compound other than (i) that catalyzes an addition reaction between an ethylenically unsaturated compound and a thiol, wherein said catalytic composition is essentially free of vanadium compounds; the curable compositions according to the present invention comprise: (a) a polyene, (b) a polythiol, and (c) a catalytic component, which consists of the above-mentioned catalytic composition.