139results 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.

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

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.

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

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.

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.

The invention relates to a method for purifying high-purity molybdenum dioxide dichloride, which comprises the following steps: S1, adding a raw material molybdenum dioxide dichloride into sublimation equipment under the protection of inert gas or nitrogen, arranging a filter screen and a small pore plate between a sublimation end and a receiving end, and vacuumizing the sublimation equipment; s2, raising the temperature of the sublimation equipment to 150-170 DEG C, the temperature of a high-boiling-point region to 120-140 DEG C, the temperature of a product region to 100-120 DEG C and the temperature of a low-boiling-point region to 80-100 DEG C, and collecting a product molybdenum dioxide dichloride in the product region; and S3, sampling the high-purity molybdenum dichloride collected in the step S2, and repeating the operation for sublimation for multiple times to finally obtain a high-purity molybdenum dichloride product. According to the method, the content of inorganic metal elements such as aluminum, iron and titanium in the dichloromolybdenum dioxide is remarkably reduced, and small-particle-size powder particles are prepared and serve as a molybdenum-containing film precursor, so that the production requirement is met.

The invention relates to the technical field of cast iron materials, in particular to a preparation method and application of a cast iron material for a high-performance engine cylinder block. The preparation method comprises the following steps: preparing a coating permeating agent; mixing the coating permeating agent and the liquid solvent to obtain a pasty permeating agent; the paste permeating agent is smeared on the surface of the cast iron material, after drying, the dried cast iron material is placed in an atmosphere furnace protected by inert gas, and the temperature is increased to 850-1000 DEG C from the room temperature; keeping the temperature for 4-12 hours; and after heat preservation is finished, cooling to room temperature, and then taking out the cast iron material to obtain the cast iron material for the high-performance engine cylinder block. The method provided by the invention is simple in process, the paste permeating agent can be smeared on the curved surface of the complex workpiece, a mold is not needed, and the method is suitable for workpieces with complex curved surface structures such as engine cylinders.

The application provides a high-stability lithium-rich manganese-based positive electrode material and a preparation method and use thereof. The preparation method comprises the following steps: mixing a modified lithium-rich manganese-based positive electrode material and a transition metal-containing ammonium salt, sintering, and obtaining an intermediate material; and performing water immersion treatment on the intermediate material to obtain the high-stability lithium-rich manganese-based positive electrode material. The preparation method provided by the application simultaneously completes oxygen vacancy, transition metal doping and lithium concentration gradient distribution on the surface of the lithium-rich manganese-based positive electrode material, so that the lithium-rich manganese-based positive electrode material has high rate performance, inhibits voltage attenuation and has excellent long-term cycle stability, and the method is simple, low in cost, good in repeatability, very suitable for large-scale production and promoting the practical application of high-capacity and high-voltage materials in high-energy-density batteries.

The invention relates to a phosphate positive electrode active material based on green cyclic utilization and a preparation method and application thereof, and belongs to the field of secondary batteries. The invention synthesizes a phosphate positive electrode active material LiFex1Nbx2Mgx3Tix4PO4 / D1D2 based on green cyclic utilization, wherein x < 1 > lt is more than or equal to 0.90; 1, 0 < = x2lt; 0.05, 0 < = x3lt; 0.05, 0 lt; x4lt; 0.05, D1 and D2 are respectively a first conductive coating layer and a second conductive coating layer, the D1 conductive coating layer is a nitrogen-sulfur-boron doped composite carbon layer based on an organic framework, and the D2 conductive coating layer is a fast ion conductor of lithium. The phosphate positive electrode active material based on green cyclic utilization is prepared by using the alkaline sodium borohydride aqueous solution to remove aluminum skimmings and a compounding process, so that the raw material utilization rate is greatly improved, and the environment bearing pressure is greatly reduced. Through the design of the composite doped conductive layer, the cycle stability, the rate capability and the high and low temperature performance of the phosphate-based positive electrode material are greatly improved, and the phosphate-based positive electrode material has a relatively good market prospect.

The invention provides a preparation method of high-purity ammonium dimolybdate. The method comprises the following steps: 1, washing industrial molybdenum oxide with hot water, stirring, and carrying out suction filtration to obtain an industrial molybdenum oxide filter cake; 2, sequentially adding pure water and sodium hydroxide into the industrial molybdenum oxide filter cake, and filtering to obtain a sodium molybdate solution; step 3, adding dilute sulphuric acid into the sodium molybdate solution, precipitating, filtering, and adding dilute sulphuric acid into the sodium molybdate solution; 4, dilute sulphuric acid is added into the organic phase, then the organic phase and a sodium molybdate solution are mixed, and a molybdenum-loaded organic phase is obtained through extraction; 5, reverse extraction is conducted on the molybdenum-loaded organic phase through a reverse extraction agent, and an ammonium molybdate solution is obtained; and 6, carrying out evaporative crystallization on the ammonium molybdate solution to obtain high-purity ammonium dimolybdate crystals. According to the method, starting from industrial molybdenum oxide, the maximum impurity removal effect is fully considered in each step, the target substance is purified in the whole process, no repeated step exists, the impurity removal range is wide, the efficiency is high, the product quality is good, and ammonium dimolybdate with the purity higher than 99.99% can be stably prepared.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material expressed by the general formula [M][Nb]y[O]z; wherein the active electrode material is oxygen deficient; wherein M consists of one of Mg, Cr, W, Mo, Cu, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Sb, Y, La, Hf, Ta, Zn, In, or Cd; y satisfies 0.5≤y≤49; and z satisfies 4≤z≤124.

It has a fine particle size suitable for electrolyte membrane fabrication, and is made of BaSc 0.8 Mo 0.2 O 3-δ The present invention provides proton-conducting composite oxide powders with a high content of [a specific substance] and methods for producing the same. [Solution] The proton-conducting composite oxide powder of the present invention is BaSc x M 1-x O 3-δ The present invention provides a method for producing a proton-conducting composite oxide powder that contains 60% by volume or more of the composite oxide represented by the formula, and has an average particle size of 0.05 μm or less. The present invention provides a method for producing a proton-conducting composite oxide powder that includes a precipitation step of adding at least one aqueous solution of a hydrochloric acid-based aqueous solution and a nitric acid-based aqueous solution, which has a pH of less than 2 and contains Ba ions, Sc ions, and ions of element M (M is one or more elements selected from Mo and W), to an alkaline aqueous solution to adjust the pH of the alkaline aqueous solution to 10 or more and less than 14 to obtain a precipitate, or a precipitation step of adding at least one aqueous solution of a hydrochloric acid-based aqueous solution and a nitric acid-based aqueous solution, which has a pH of less than 2 and contains Ba ions and Sc ions, to an alkaline aqueous solution, which has a pH of less than 14 to adjust the pH of the alkaline aqueous solution to 10 or more and less than 14 to obtain a precipitate, a drying step of drying the precipitate at a predetermined temperature to obtain a precursor powder, and a calcination step of calcining the precursor powder at a temperature of 700°C or higher.

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.