215results about "Molybdeum compounds" patented technology

The invention discloses a high-initial-efficiency fast-charge graphite composite material and a preparation method thereof, the composite material is of a core-shell structure, the core is graphite, and the shell is lithium sulfonate / lithium molybdate and an amorphous carbon coating layer thereof; the mass ratio of the shell is 5-15 wt% according to the mass ratio of the composite material being 100%. The preparation method comprises the following steps: adding a molybdenum compound into a solvent to prepare a solution, adding graphite oxide, an inorganic lithium salt and a carbon nanotube conductive solution, reacting for 2-12 hours at the temperature of 50-120 DEG C, filtering, carbonizing filter residues to obtain a lithium molybdate conductive agent coated graphite material, and depositing a lithium sulfonate derivative on the surface of the lithium molybdate conductive agent coated graphite material by an atomization method to obtain the lithium molybdate conductive agent coated graphite material. The electron and ion conductivity of the material can be improved, and the rate and the first efficiency of the material can be improved.

A modified lithium-rich manganese-based positive electrode material, and a preparation method therefor and the use thereof. The modified lithium-rich manganese-based positive electrode material comprises a lithium-rich manganese-based positive electrode material, wherein the bulk phase of the lithium-rich manganese-based positive electrode material is doped with a high-valent transition metal element, and the surface phase of the lithium-rich manganese-based positive electrode material has a lithium metal compound coating layer and an oxygen vacancy. In the modified lithium-rich manganese-based positive electrode material, the doping with a bulk-phase high-valence transition metal element, the coating with a surface-phase lithium metal compound coating layer and the construction of an oxygen vacancy are conducted at the same time; and by means of the co-action of the three, the rate capability and the cycling performance of the lithium-rich manganese-based positive electrode material can be significantly improved, which is of great significance for the further commercialization of the lithium-rich manganese-based positive electrode material.

The invention provides a method for short-process all-component echelon recovery of a waste hydrogenation catalyst, and relates to the field of solid waste treatment. The recovery method of the waste hydrogenation catalyst comprises the following steps: roasting the waste hydrogenation catalyst and sodium carbonate to obtain a roasted product; the roasted product is leached with water, and leaching liquid and leaching residues are obtained; extracting the leaching solution by using an extracting agent to obtain a vanadium-molybdenum-containing organic phase, sequentially carrying out reverse extraction treatment on the vanadium-molybdenum-containing organic phase by using a strong alkaline reverse extraction agent and a weak alkaline reverse extraction agent to obtain a vanadium reverse extraction solution and a molybdenum reverse extraction solution, and carrying out vanadium precipitation treatment on the vanadium reverse extraction solution to obtain ammonium metavanadate; acidizing the molybdenum strip liquor to precipitate molybdenum to obtain ammonium molybdate; carrying out sintering treatment on the leaching residues and alkaline substances, leaching obtained calcine with water to obtain water leaching residues and filtrate, and carrying out aluminum precipitation treatment on the filtrate to obtain aluminum hydroxide, aluminum oxide or pseudo-boehmite; and reducing and smelting the water leaching residues to obtain the ferro-nickel alloy. According to the invention, multi-element comprehensive recovery of all components of vanadium, molybdenum, nickel, aluminum and sulfur can be realized, and high-value utilization of all components of the waste hydrogenation catalyst is realized.

A production process of electronic grade molybdenum dichloride dioxide comprises the following steps: S1, pretreatment: contacting molybdenum trioxide with a dilute acid solution at a low temperature for pickling to remove alkaline impurities and soluble metal impurities adsorbed on the surface, and drying for later use after washing; s2, wet synthesis: in an inert gas atmosphere, reacting the molybdenum trioxide subjected to acid pickling in the step S1 with concentrated hydrochloric acid of which the mass is 4-5 times of that of the molybdenum trioxide at 80-100 DEG C, and after the reaction is finished, evaporating and concentrating in a high-temperature chlorine atmosphere to generate a crude product of dichloromolybdenum dioxide; s3, primary sublimation purification; s4, complexing and decomplexing purification; and S5, secondary sublimation purification: using a quartz sublimation tower to carry out vacuum sublimation on the secondary decomplexed molybdenum dichloride obtained in the step S34, and collecting sublimation condensate to obtain the electronic grade molybdenum dichloride. The final product purity of the production process is greater than or equal to 6N, and the process can be used for large-scale production.

The invention discloses a preparation method of an ultrathin two-dimensional nanosheet, the ultrathin two-dimensional nanosheet and application of the ultrathin two-dimensional nanosheet, and the preparation method comprises the following steps: (1) mixing a raw material containing a layered solid-phase material I with an intercalator, and carrying out intercalation reaction to obtain an intercalated layered solid-phase material II; and (2) mixing the intercalated layered solid-phase material II obtained in the step (1) with a solvent, and carrying out ultrasonic treatment to obtain the ultrathin two-dimensional nanosheet, the chemical formula of the layered solid-phase material I is MQ2. The material has potential application value in catalysis, energy storage and quantum devices.

The present invention provides a novel method for preparing molybdenum dioxide dichloride, belonging to the technical field of molybdenum dioxide dichloride. The method uses molybdenum trichloride, activated carbon, and chlorine as reaction raw materials. The molybdenum trichloride and activated carbon are mixed in a certain proportion, placed in a tubular reactor, heated to a certain temperature, and then an excess of dry chlorine is introduced to react to produce molybdenum dioxide dichloride gas. This gas is collected in a cooling chamber to obtain molybdenum dioxide dichloride solid. The crude product is then sublimated and purified to ultimately obtain a high-purity molybdenum dioxide dichloride product. This method has a high yield, improves raw material utilization and product yield, reduces production costs, and is conducive to industrial production.

The invention discloses a molybdenum-magnesium co-doped Li2MoO4 coated high-nickel ternary positive electrode material, a preparation method thereof and a lithium ion battery. The invention belongs to the field of lithium ion batteries, and discloses a molybdenum-magnesium co-doped Li2MoO4 coated high-nickel ternary positive electrode material, which is characterized in that a high-nickel ternary positive electrode material is used as a matrix, Mo and Mg are co-doped in the matrix, and the surface of the matrix is coated with a Li2MoO4 coating layer. The invention also discloses a preparation method of the molybdenum-magnesium co-doped Li2MoO4 coated high-nickel ternary positive electrode material and a lithium ion battery containing the material. According to the molybdenum-magnesium co-doped Li2MoO4 coated high-nickel ternary positive electrode material disclosed by the invention, Mo / Mg double doping can enhance the interface stability and the internal crystal structure stability of the material at the same time, and the Li2MoO4 coating layer is beneficial to inhibition of side reaction with an electrolyte and reduction of electrochemical impedance, so that the electrochemical performance of the high-nickel ternary positive electrode material is comprehensively improved; molybdenum and magnesium co-doping and Li2MoO4 coating synergistically improve the electrochemical performance of the material.

The present invention belongs to the field of hydrometallurgy technology, and specifically relates to a method for recovering ammonia and nitrogen from ammonium molybdate mother liquor and removing other impurity ions. The method comprises: extracting the ammonium molybdate mother liquor and performing oil separation to produce an ammonia recovery stock solution; neutralizing and filtering the ammonia recovery stock solution to obtain a neutralized filtrate; deeply decalcifying the neutralized filtrate to obtain a decalcified filtrate; steam stripping the decalcified filtrate to recover ammonia; recovering ammonia from the non-condensable gas produced in the overhead condenser after steam stripping and the steam produced during the neutralization process; and heat exchanging the deeply impurity-removed purified liquid produced at the bottom of the steam stripping tower and the oil-separated ammonia recovery stock solution, cooling them, and then transferring them to the production system for reuse. The present invention can effectively recover ammonia and nitrogen resources from the ammonium molybdate mother liquor, deeply remove other impurity ions in the solution, eliminate the blockage effect of CaSO4 scale on pipelines and heat exchangers, improve the Mo leaching rate, and reduce the three-phase product yield and organic phase loss.

The present invention discloses a layered bimetallic sulfide nanomaterial, a preparation method and an application thereof, and belongs to the field of nanomaterial technology. The layered bimetallic sulfide nanomaterial provided by the present invention is a two-dimensional layered nanosheet composed of Cu2MoS4, which is prepared by a simple solvent method. The preparation process is inexpensive and the reaction conditions are mild. Under visible light conditions, the layered bimetallic sulfide nanomaterial produces not only the C1 product CO but also the C2 product C2H4 when photocatalytically reducing CO2. The CO yield of the layered bimetallic sulfide nanomaterial is higher than that of Cu2S / MoS2 heterojunction, Cu2S and MoS2. When Cu2S / MoS2 heterojunction, Cu2S and MoS2 are used for photocatalytic CO2 reduction, the products do not contain C2H4, indicating that the layered bimetallic sulfide nanomaterial has excellent photocatalytic performance.

To provide a composite oxide particle material composed of zinc molybdate with high purity and high circularity.SOLUTION: A composite oxide particle material is composed of a complex oxide of molybdenum and zinc with an average particle size of 0.1 μm or more and 5.0 μm or less, a BET specific surface area of 1 m2 / g or more and 20 m2 / g or less, (XRD 26.6° peak intensity) / (XRD 24.2° peak intensity) of 1.20 or more, an impurity concentration of 1 mass% or less, and a circularity of 0.90 or more. XRD is measured with CuKα rays.SELECTED DRAWING: Figure 1

A method for producing a titanium molybdate material.SOLUTION: The method includes reacting a metallic molybdenum-99 (Mo-99) material in a liquid medium with a first acid to obtain a Mo composition, combining the Mo composition with a titanium source to obtain a Ti-Mo composition, and pH adjusting the Ti-Mo composition with a base to precipitate a plurality of Ti-Mo particulates.SELECTED DRAWING: Figure 1

The invention discloses a preparation method of zirconium molybdate particles, and belongs to the technical field of inorganic functional materials. In the preparation process, zirconium nitrate pentahydrate and ammonium molybdate tetrahydrate are used as raw materials, and deionized water is used as a solvent. The preparation method comprises the following steps: respectively dissolving the two raw materials in water, mixing, washing a reaction white gel product with water, washing with alcohol, centrifuging, drying, grinding and screening to obtain a precursor, roasting and recrystallizing to obtain zirconium molybdate particles, and controlling the particle size of the particles by the screening mesh number. The method has the advantages of few types of raw materials, simple preparation process and controllable particle size, and is beneficial to large-scale production and material performance optimization of zirconium molybdate.

A high-stability lithium-rich manganese-based positive electrode material, a preparation method therefor, and use thereof. The preparation method comprises the following steps: mixing a lithium-rich manganese-based positive electrode material to be modified and an ammonium salt containing a transition metal, and sintering to give an intermediate material; and performing water leaching treatment on the intermediate material to give the high-stability lithium-rich manganese-based positive electrode material. The preparation method synchronously allows for oxygen vacancies, transition metal doping, and lithium concentration gradient distribution on the surface of the lithium-rich manganese-based positive electrode material, thereby enabling the lithium-rich manganese-based positive electrode material to possess high rate performance, voltage attenuation suppression, and excellent long-term cycling stability. Moreover, the method is simple and low-cost, and has good repeatability, making it very suitable for large-scale production and facilitating the practical application of high-capacity and high-voltage materials in high-energy-density batteries.

The invention provides a preparation method of a molybdenum-copper oxide / carbon nanotube fiber negative electrode material and a product and application thereof. The preparation method comprises the following steps: dissolving a soluble molybdenum source, a copper source, organic alcohol and terephthalic acid in a dimethylformamide solution; magnetically stirring for 1-2 hours until the solution is uniform to obtain a solution A; transferring the solution A into a reaction kettle to react at 160-180 DEG C for 8-10 hours, cooling to room temperature, washing with deionized water and an organic solvent for 3-5 times, and drying in a drying oven at 60-80 DEG C overnight to obtain a precursor B; and putting the precursor B into a muffle furnace, heating to 600-800 DEG C at a heating rate of 2-5 DEG C / min, calcining, and keeping the temperature for 2-4 hours to obtain the molybdenum-copper oxide / carbon nanotube fiber. Under the condition of the current density of 100 mA / g, the first specific discharge capacity is 1675 mAh / g, the second specific discharge capacity is 1560 mAh / g, the specific discharge capacity is 1162 mAh / g after circulation for 5 times, the specific discharge capacity is 990 mAh / g after circulation for 100 times, and the capacity retention ratio is 85.2% compared with the fifth specific discharge capacity.

The invention relates to a preparation method of a polyacid modified CuMoSelectrode material, and belongs to the technical field of new energy materials and photoelectric conversion. According to the preparation method, an in-situ synthesis method is adopted, and SiW11Co is doped in a CuMoS material through a one-step solvothermal preparation technology; comprising the following steps: S1, dissolving sodium molybdate and thioacetamide in ethylene glycol, then adding SiW11Co into the solution for dissolving, finally adding Cu2O, and carrying out ultrasonic treatment on the mixed solution at room temperature for 10-15 minutes to obtain a uniform dark brown suspension; s2, continuously stirring for 5 minutes, transferring the precursor suspension into a high-pressure reaction kettle, and carrying out a solvothermal process for 22-24 hours; s3, the reaction kettle is cooled to the room temperature, a final product is centrifugally washed three times with deionized water and absolute ethyl alcohol respectively, then vacuum drying is conducted, and the SiW11Co / Cu2MoS4 composite material is obtained. By introducing a proper amount of SiW11Co, a rough structure is formed on the surface of CuMoS, the number of active sites is increased, the specific surface area is increased, and the catalytic performance and the stability are far better than those of a traditional CuS counter electrode and an unmodified CuMoS counter electrode.

This utility model discloses an acid precipitation reactor for the preparation of ammonium molybdate, including an acid precipitation reactor body and a top cover. The top cover is disposed on the acid precipitation reactor body, and a fixing frame is disposed on the top cover. A reciprocating drive mechanism is disposed on the fixing frame, and a support is disposed on the moving end of the reciprocating drive mechanism. A drive control component is disposed on the support. This utility model relates to the field of ammonium molybdate preparation technology. The reciprocating drive mechanism realizes the reciprocating adjustment control of the support in the vertical direction, thereby realizing the vertical movement control of the hollow shaft tube and the stirring shaft. At the same time, the drive control component realizes the rotation control of the hollow shaft tube and the stirring shaft, which can realize the reverse rotation of the first stirring blade and the second stirring blade, effectively increasing the stirring operation coverage area, improving the uniformity of mixing, accelerating the acid precipitation reaction rate in the ammonium molybdate preparation process, and improving production efficiency.

Provided are alumina particles containing molybdenum and with their shape controlled. The alumina particles contain phosphorus and molybdenum. The alumina particles are preferably plate-like or card house-like. The phosphorus is preferably unevenly distributed in surface layers of the alumina particles. Also provided are a resin composition containing the alumina particles and a resin, a molded body made by molding the resin composition, and a method for producing the alumina particle including a step of firing the aluminum compound in the presence of a molybdenum compound and a phosphorous compound.

The invention relates to the technical field of lithium ion batteries, and discloses a multi-element co-doped garnet solid electrolyte and a preparation method and application thereof.The solid electrolyte is a compound with the following chemical formula structure: (Li < 1 + alpha > A < 1m + t >) (La < 3 + 3-uD < 2 + u >) (Zr < 4 + x > Hf < 4 + y > Y < 3 + z > Ta < 5 + v > Mr + w) (O < 2-12-oEs-o), chemical valence balance is met, alpha is smaller than or equal to 6.8, y is smaller than or equal to 0.07, y is smaller than or equal to 0.07, and y is smaller than or equal to 0.07. V + w + x + y + z = 2, and the range among v, w, x and y does not exceed 50% of the maximum value. According to the multi-element co-doped garnet solid electrolyte provided by the invention, the ionic conductivity can be remarkably improved, the activation energy can be reduced, the air stability can be greatly improved, and the applicability is wide.

This invention provides an extraction resin, its preparation method, and its application in the purification of ammonium molybdate. The extraction resin is prepared by loading an alkylphosphine-primary amine mixed extractant onto an inert support through vacuum stirring. Specifically, swelling treatment increases the specific surface area and porosity of the inert support, and the synergistic effect of the mixed extractant enhances the selective adsorption capacity for impurities in molybdate. Vacuum stirring ensures uniform dispersion of the extractant and a strong bond with the resin. This preparation method effectively solves the problems of uneven dispersion, easy loss, and easy saturation of extractants in traditional extraction resins, providing a more efficient separation material for high-purity molybdenum production.

A Ce-Mo-based composite oxide ceramic contains: cerium; molybdenum; and at least one type of trace element selected from the group consisting of Al, Zr, and Si.

Disclosed herein are layered transition metal oxide materials. Also disclosed herein are electrodes comprising layered transition metal oxide materials. In addition, also disclosed herein is the use of such layered transition metal oxide materials in the manufacture of electrodes and electrochemical cells, and processes for making such layered transition metal oxide materials and electrodes.

The invention discloses an up-conversion luminescence time sequence regulation color-changing material, color-changing ink and a preparation method and application thereof, the chemical general formula of the material is SrMoO4: xYb < 3 + >, yHo < 3 + > and zNa < + >, x is the molar doping amount of Yb < 3 + >, y is the molar doping amount of Ho < 3 + >, z is the molar doping amount of Na < + >, 0.10 < = x < = 0.40, 0.01 < = y < = 0.03, and 0.21 < = z < = 0.31. According to the material, under the condition of charge compensation ion Na < + > co-doping, the solid solubility of sensitizer ions Yb < 3 + > in SrMoO4 crystal lattices is remarkably improved, and under the condition of Na < + > excessive charge compensation, the material is remarkably superior to the upconversion luminescence effect of other charge compensation enhanced heterovalent doping systems reported in literatures; the color-changing ink for advanced dynamic anti-counterfeiting and the application method thereof are designed and developed by combining the remarkably enhanced up-conversion luminescence and the excellent time sequence regulation color-changing characteristic of the material, and the color-changing ink has a wide application prospect in the field of dynamic fluorescent anti-counterfeiting.

The present invention relates to an active electrode material and a method for producing the active electrode material. Such materials are of interest as active electrode materials for lithium-ion or sodium-ion batteries. The present invention relates to a compound represented by the general formula M1 a Al 1-a M2 b Nb 11-b O 29-c-d Q d The active electrode material is represented by the formula:

A process for producing a titanium-molybdate material is provided. The process includes a step of reacting a metal molybdenum (Mo) material in a liquid medium with a first acid to provide a Mo composition and combining the Mo composition with a titanium source to provide a Ti-Mo composition. The Ti-Mo composition can be pH adjusted with a base to precipitate a plurality of Ti-Mo particulates.

To provide alumina particles containing molybdenum and controlled in shape.SOLUTION: Alumina particles contain phosphorus and molybdenum. The alumina particles are preferably plate-like or card-house-like. The phosphorus is preferably distributed unevenly on a surface layer of the alumina particles. A resin composition contains the alumina particles and a resin. A molded product is formed by molding the resin composition. A method for producing the alumina particles includes a step of firing the aluminum compound in the presence of a molybdenum compound and a phosphorus compound.SELECTED DRAWING: Figure 1

Plate-like alumina particles containing titanium and at least one element (A) selected from the group consisting of iron, nickel, copper, chromium, cobalt, zinc, scandium, and ruthenium.

The invention relates to a method for producing ammonium heptamolybdate with high crystal yield and high purity by taking ammonium tetramolybdate as a raw material, which comprises the following steps: adding pure water into a batching tank at room temperature, starting a stirrer, introducing liquid ammonia into the batching tank, then adding ammonium tetramolybdate, stirring and dissolving, heating to 65 DEG C, and stirring and dissolving for 1 hour at the constant temperature of 65-70 DEG C to obtain an ammonium molybdate mixed solution; refluxing, circulating and precisely filtering by a precise filter, pumping into a cooling crystallizing tank, adding nitric acid into the crystallizing tank while stirring at room temperature to adjust the pH value of the solution to 6.2-6.5, and continuously stirring for 30 minutes; and cooling the ammonium molybdate mixed solution in the cooling crystallization tank for 7 hours, cooling the temperature of the material in the crystallization tank to 10-12 DEG C, crystallizing and separating out an ammonium heptamolybdate product, centrifugally filtering, introducing air with the relative humidity of 40% and the temperature of 15-25 DEG C into a rotary roller dryer, and drying to obtain the ammonium heptamolybdate. The method has the advantages of simple and reasonable process, regular product crystal form, good crystallization yield and high purity.

To provide: an active material, capable of achieving a high capacity secondary battery; an electrode; a secondary battery; a battery pack; and a vehicle.SOLUTION: There is provided an active material including a composite oxide that has a structure including a plurality of rhenium oxide blocks of different sizes, the rhenium oxide blocks being connected without periodicity while at least sharing octahedral edges. The rhenium oxide block contains octahedral structures configured of oxygen and a metal element and is configured by octahedral structures sharing vertices. The composite oxide is represented by general formula LiaMbNbMocOd. Here, M is one or more selected from the group consisting of Ti, V, Ta, Fe, Co, Mn, Ni, Bi, Sb, As, P, Cr, W, B, Na, K, Mg, Al, Ca, Y and Si, and 0≤a≤b+2+3c, 0≤b≤1.5, 0≤c≤0.5, and 2.33≤d / (1+b+c)≤2.50 are satisfied.SELECTED DRAWING: Figure 2

The invention discloses a copper molybdate catalyst, a preparation method, application and a method for producing 4-propyl phenol. A preparation method of a copper molybdate catalyst for catalyzing demethoxylation of 4-propyl guaiacol comprises the following steps: mixing water-soluble molybdate, water-soluble copper salt and water to obtain a metal aqueous solution; and concentrating, drying and calcining the metal aqueous solution to obtain the copper molybdate catalyst. The preparation method is simpler to operate and more environmentally friendly, the prepared copper molybdate catalyst can be used for catalyzing 4-propyl guaiacol to remove methoxy so as to produce 4-propyl phenol, and the catalytic performance and stability are excellent.