67results about "Magnesium compounds" patented technology

The invention discloses a high-selectivity magnesium-lithium separation nanofiltration membrane based on a polyolefin base membrane and a preparation method and application of the high-selectivity magnesium-lithium separation nanofiltration membrane based on the polyolefin base membrane. The preparation method comprises the steps that the polyolefin base membrane is in single-face contact with an organic phase monomer solution containing an isophthaloyl chloride monomer or a paraphthaloyl chloride monomer, and the redundant solution is poured out; one side, contacted with the organic phase monomer solution, of the obtained membrane is contacted with a polyethyleneimine-containing aqueous phase monomer solution, an interfacial polymerization reaction is carried out, the obtained membrane is placed in a drying oven for heat treatment, then the membrane is soaked in an organic solution for activation, and the polyvinyl composite nanofiltration membrane is obtained. The nanofiltration membrane has high magnesium ion interception and high magnesium-lithium separation selectivity in a mixed solution with a high magnesium-lithium ratio, the preparation process is simple, conditions are mild, amplification and industrial production are easy to realize, and the nanofiltration membrane has good long-term operation stability.

The invention discloses a resourceful treatment method for wastewater containing magnesium and manganese ammonium sulfate, and belongs to the technical field of wastewater resourceful treatment. The method comprises the following steps: neutralizing the ammonium sulfate wastewater containing magnesium and manganese to remove heavy substances, deeply removing calcium from the neutralized and precipitated filtrate by adopting oxalic acid and a crystal inducer through crystallization, leaching the calcium-removed and precipitated filter residue by adopting sulfuric acid, recycling the leachate which is an oxalic acid solution, and removing manganese from the calcium-removed and precipitated filtrate through catalytic oxidation and decomposing residual oxalic acid to obtain manganese residues and catalytic oxidation filtrate; according to the method, the magnesium-manganese-containing ammonium sulfate wastewater can be subjected to resourceful treatment to obtain the magnesium ammonium sulfate product and the ammonium sulfate product with relatively high additional value, and the problems of difficulty in impurity removal, low cost and the like in the existing magnesium-manganese-containing ammonium sulfate wastewater treatment process are solved. The purity of by-products is low, and the like.

The present invention provides a pre-sodium treated positive electrode material for copper-zinc-based sodium ion battery and method of preparing the same. The method comprises obtaining a mixed solution containing copper-zinc-based elements through wet pre-sodium first, then conducting spray drying of the mixed solution containing copper-zinc-based elements to obtain precursor powder of positive electrode material for copper-zinc-based sodium ion battery, and then mixing the precursor powder with a sodium source for sintering, coating and crushing to obtain positive electrode material for copper-zinc-based sodium ion battery. The pre-sodium treated positive electrode material for copper-zinc-based sodium ion battery provided by the present invention introduces weakly oxidizing zinc and nickel elements on the basis of the copper-based material, reducing the use of highly oxidizing copper and iron elements. After being prepared into a battery, the oxidation of metal ions in the electrochemical environment is reduced overall, greatly reducing the oxidation of copper ions to the electrolyte, reducing the CO2 gas generated by oxidation and decomposition of the electrolyte, stabilizing the electrochemical environment, and improving the electrical performance of the battery.

The present invention relates to poly(melamine-silicate) derivatives as biocidal disinfection and decontamination agents, and to methods for their production and use. More specifically, the invention relates to halogenated adducts of poly(melamine- silicate) with metal oxides.

A method for the processing a mixed particulate evaporite minerals with particles of size at least 0.25 mm where the minerals comprise a first evaporite with a first metal contaminant and a second eva

A cathode composition for a battery has the general formula: Li1+aMn1-bMg1-cO2; wherein the values of a, b and c are greater than 0. A method of making the cathode composition is also disclosed, wherein a lithium manganese nickel oxide precursor is subjected to high energy ball milling, the precursor having oxidation states that are equal to the oxidation states of the respective elements in the final cathode composition. The composition preferably has a single phase rock salt structure, wherein there are no peaks below a 2ϴ value of 35 in the XRD pattern. Preferably, the manganese component in the composition comprises a plurality of oxidation states, in particular a mixture of Mn(III) and Mn(IV). A cathode comprising the cathode composition and an electrochemical cell comprising the cathode are also claimed.

This application discloses hexafluorophosphate, phosphorus pentafluoride, and its preparation method and use. This application does not use phosphorus pentafluoride as raw material to prepare hexafluorophosphate, and does not use hydrogen fluoride as raw material to produce phosphorus pentafluoride, reducing the safety risk of production, and uses chemical reagents such as diphosphorus pentaoxide and sulfur trioxide, which have a wide supply source, as raw materials, reducing raw material costs and favoring industrial large-scale production. [Means] The method for preparing the hexafluorophosphate comprises mixing a phosphoric acid solution of diphosphorus pentoxide with sulfur trioxide and a fluoride in an inert gas atmosphere, and after the reaction, sequentially carrying out evaporation concentration, dissolution, filtration and drying to obtain the hexafluorophosphate. The method for preparing the phosphorus pentafluoride using the hexafluorophosphate obtained by the preparation method of the present application comprises mixing the hexafluorophosphate with a catalyst solution, and after the catalytic reaction, sequentially carrying out condensation, pressurization liquefaction and removal of impurities by adsorption to obtain the phosphorus pentafluoride.

The present invention provides a negative electrode material comprising a Mg(O) / C composite, which is a carbide of Mg-MOF-74 (magnesium-based metal-organic framework-74), wherein O is present or absent, a negative electrode comprising the negative electrode material, a lithium-ion secondary battery comprising the negative electrode, and a method for producing the Mg(O) / C composite.

There is provided a cathode composition for a battery of the general formula: Li1+aMn1−bMg1−cO2; wherein the values of a, b and c are greater than 0. There is also provided a method of making the cathode composition for a battery, a cathode containing the cathode composition, and an electrochemical cell containing the cathode.

The application discloses a sodium-ion layered positive electrode material, a preparation method and a positive electrode sheet. + , H + , F ‑ of a lithium-ion battery core recovery liquid; a sodium source and the lithium-ion battery core recovery liquid are prepared into a solution; (2) a sodium-ion layered positive electrode material is mixed into the solution to prepare a mixed slurry; (3) the mixed slurry is subjected to suction filtration and drying to obtain a precursor powder; and (4) the precursor powder is sintered to obtain the sodium-ion layered positive electrode material. The application overcomes the defects of poor cycle performance and unstable surface of the sodium-ion layered positive electrode material.

A cathode composition for a battery has the general formula Mg1+xMn1-xO2; wherein the value of x is greater than 0 and less than 1. Preferably, x ≤ 0.3, and most preferably the composition comprises M

This invention relates to a method for the processing of evaporite minerals, in particular for the manufacture of potash (KCl). Mixed evaporite minerals containing first and second metal contaminants are subjected to selective dissolution / decomposition, thereby facilitating the separation of the metal contaminants into separate by-product streams. The invention further provides a method for the processing of the separate by-product streams to obtain useful products based on each of the first and second metal contaminants.

A system for the synthesis of magnetoelectronically tunable spinel ferrite nanoparticles, comprising: a) a precursor preparation unit for the preparation of a homogeneous nitrate precursor solution, wherein the precursor preparation unit facilitates the dissolution of stoichiometric amounts of magnesium nitrate hexahydrate, nickel nitrate hexahydrate, iron(III) nitrate nonahydrate and chromium(III) nitrate nonahydrate in deionized water; b) a fuel mixing unit configured to introduce a binary mixture of urea and glucose into the dissolved homogeneous nitrate solution in a fuel-oxidant ratio that achieves fuel equivalence; c) a gel formation unit configured to maintain the temperature at 70-80 °C under continuous stirring to convert the fuel mixture into a viscous gel; d) a combustion unit comprising a preheated muffle furnace maintained at 450 ± 10 °C and enabling the initiation of a self-propagating combustion reaction; and e) a calcination plant configured for the thermal treatment of crushed precursor ash at 600 °C for 2 hours and subsequently at 750 °C for 2 hours to produce phase-pure cubic spinel Mg 1-x Ni x To produce FeCrO4 nanoparticles.

A structure (1) comprises a base material (10) that contains a continuous phase (11) of a polycrystalline body of a complex fluoride containing an alkali metal. The structure (1) contains at least 85 mass% of an inorganic substance, and the structure (1) contains at least 50 mass% polycrystalline body of a complex fluoride. The porosity of the structure (1) is 30% or less, the median value of the pore diameter of the structure (1) is 500 nm or less, and the thickness of the structure (1) is 10 μm or thicker.

An electrolyte containing functionalized phosphine oxides or phosphine sulfides suitable for use in electrochemical energy storage devices useful for reducing battery resistance, increasing cycle life, and improving high-temperature performance; and an electrolyte containing the functionalized phosphine oxides or phosphine sulfides suitable for use in electrochemical energy storage devices.

To provide a manufacturing method of a positive electrode active material of a lithium ion secondary battery.SOLUTION: A method for manufacturing a positive electrode active material includes a first step of placing a first container containing a mixture of a lithium oxide, a fluoride, and a magnesium compound in a heating furnace, a second step of making the inside of the heating furnace an atmosphere containing oxygen, and a third step of heating the inside of the heating furnace, in which the third step is performed after the first step and the second step are performed. Before the inside of the heating furnace is heated, the atmosphere in the heating furnace is preferably made to contain oxygen. More preferably, the fluoride is lithium fluoride and the magnesium compound is magnesium fluoride.SELECTED DRAWING: Figure 1

To provide a pre-sodium treated positive electrode material for a copper-zinc-based sodium ion battery and a method of preparing the same.SOLUTION: A method includes: obtaining a mixed solution containing copper-zinc-based elements through wet pre-sodium treatment; then conducting spray drying of the mixed solution containing copper-zinc-based elements to obtain precursor powder of a positive electrode material for a copper-zinc-based sodium ion battery; and then mixing the precursor powder with a sodium source for sintering, coating and crushing to obtain a positive electrode material for a copper-zinc-based sodium ion battery. A positive electrode material for a battery of the present invention introduces weakly oxidizing zinc and nickel elements based on a copper-based material, and reduces the use of highly oxidizing copper and iron elements. After the material is prepared into a battery, the oxidation of metal ions in an electrochemical environment is reduced overall, so that the oxidation of copper ions to an electrolyte is greatly reduced, CO2 gas generated by oxidation and decomposition of the electrolyte is reduced, the electrochemical environment is stabilized, and the electrical performance of the battery is improved.SELECTED DRAWING: Figure 1

Provided are: a process for the production of porous magnesium, comprising a simple solution-based process in which a magnesium precursor is added to a reduction solution and reacted; porous magnesium produced by the process; and a hydrogen storage material comprising porous magnesium with hydrogen incorporated.

The present invention discloses a highly selective magnesium-lithium separation nanofiltration membrane based on a polyolefin-based membrane, its preparation method and application. The preparation method is as follows: The polyolefin substrate membrane is brought into single-sided contact with an organic phase monomer solution containing isophthaloyl chloride or terephthaloyl chloride monomers. The excess solution is poured out. The side of the obtained membrane that has been in contact with the organic phase monomer solution is then brought into contact with an aqueous phase monomer solution containing polyethyleneimine, and an interfacial polymerization reaction occurs. The obtained membrane is placed in an oven for heat treatment, and then the membrane is soaked in an organic solution for activation, thus obtaining a polyvinyl composite nanofiltration membrane. The nanofiltration membrane of the present invention has high magnesium ion retention and high magnesium-lithium separation selectivity in a mixed solution with a high magnesium-lithium ratio. The preparation process is simple, the conditions are mild, it is easy to scale up and realize industrial production, and it has good long-term operation stability.

To create a fire protection material with improved cooling properties, easier handling and processing, and more cost-effective production, magnesium phosphate hydrate, such as magnesium phosphate octahydrate, is used as an ablative fire protection material (20) or in an ablative fire protection material (20) for fire protection purposes according to the invention. In one embodiment, a composition for forming an ablative fire protection material (20) containing 55 wt% to 80 wt% magnesium phosphate hydrate (12), 20 wt.% to 40 wt.% carrier material (10), and 1 wt.% to 20 wt.% of a crust-forming material (14). in an extruder (16) to form a flexible strand of ablative fire protection material (20), in particular to form a flexible sheet (22).

Provided are a method for producing porous magnesium having a simple solution process of adding a magnesium precursor to a reductant solution and reacting, porous magnesium produced by the method, and hydrogen storage material containing hydrogen supported in the porous magnesium.

The application belongs to the field of water treatment equipment and application technology, and particularly relates to a selective electrodialysis device and application thereof. The selective electrodialysis device comprises an electrodialysis cell, an anode and a cathode arranged on the two sides of the electrodialysis cell, and a cation exchange membrane and an anion exchange membrane arranged between the anode and the cathode in sequence. The cation exchange membrane is made of sulfonated polybenzimidazole as a base material, and the surface of the cation exchange membrane is coated with polystyrene sodium sulfonate containing porous micro-nano materials. A protective layer containing polydiphenylpiperidine is coated on the side of the cation exchange membrane facing the anode. The anion exchange membrane is made of quaternary amine polyfluorosulfone or polyether sulfone as a base material, and the surface of the anion exchange membrane is coated with polydimethyl diallyl ammonium chloride. The device can efficiently separate monovalent ions and polyvalent ions, the functionalization of the ion exchange membrane increases the membrane charge density, promotes the rapid migration of ions under the action of an electric field, and improves the ion transfer rate. The device is stable in operation, has a high separation rate and a high current efficiency.

A system and method for continuous production of Mg from metallothermic reduction of magnesium bearing ore from both the reactor side and condenser side of the system, using a separate collection vessel. The furnace is a heated tube through which a moving bed of tableted feed flows. The condenser is a common heat exchanger design (shell / tube, plate / plate, etc.) and uses a heat transfer liquid to cool and condense magnesium gas under vacuum or pressure conditions. The cooling medium can be molten salts or metals which are not in direct contact with the magnesium metal. Liquid magnesium flows from the condenser into a collection vessel for further processing. Continuous operation is achieved by supplying a constant feed of tablets into the furnace, producing a constant stream of Mg gas to the condenser. Magnesium liquid product is tapped periodically from the collection vessel.

Provided is a structure (1), including: a base material (10) that includes a continuous phase (11) of a polycrystalline substance of a complex fluoride including an alkali metal, wherein the structure (1) includes an inorganic substance in an amount of 85% by mass or more, the structure (1) includes the polycrystalline substance of the complex fluoride in an amount of 50% by mass or more, the structure (1) has a porosity of 30% or less, the structure (1) has a median pore size of 500 nm or less, and the structure has a thickness of 10 µm or more.

Provided are: a method for producing porous magnesium having a simple solution process of adding a magnesium precursor to a reducing agent solution; porous magnesium produced by the process; and a hydrogen storage material comprising hydrogen supported in the porous magnesium.

To provide a method for manufacturing a positive electrode active material of a lithium ion secondary battery.SOLUTION: A method for manufacturing a positive electrode active material includes: a first step of placing in a heating furnace, a first container in which a mixture of a lithium oxide, a fluoride and a magnesium compound is put; a second step of bringing the inside of the heating furnace into an oxygen containing atmosphere; and a third step of heating the inside of the heating furnace. The first step and the second step are executed and then, the third step is executed. It is preferable that the inside of the heating furnace is brought into the oxygen containing atmosphere before heating the inside of the heating furnace. It is more preferable that the fluoride is lithium fluoride and the magnesium compound is magnesium fluoride.SELECTED DRAWING: Figure 1

This apparatus for producing complex fluoride particles comprises: a mixer for mixing a first solution in which a first compound that is an alkali metal fluoride is dissolved, a second solution in which a second compound having a metal element different from the alkali metal element contained in the alkali metal fluoride is dissolved, and a third solution in which a third compound that reacts with hydroxide ions to produce water is dissolved, thereby producing a mixed solution containing the complex fluoride particles; a pH detection unit for measuring the pH value of the mixed solution, which changes as water is produced; and an estimation unit for estimating the particle size of the complex fluoride particles according to the pH value.

A method for forming a positive electrode active material of a lithium ion secondary battery is provided. The method for forming a positive electrode active material includes a first step of placing a first container in which a mixture of a lithium oxide, a fluoride, and a magnesium compound are put, in a heating furnace, a second step of providing an atmosphere including oxygen in an inside of the heating furnace, and a third step of heating the inside of the heating furnace. The third step is performed after the first step and the second step are performed. Preferably, an atmosphere including oxygen is provided in the heating furnace before the inside of the heating furnace is heated. More preferably, the fluoride is lithium fluoride and the magnesium compound is magnesium fluoride.

To provide a method for manufacturing a positive electrode active material of a lithium ion secondary battery.SOLUTION: A method for manufacturing a positive electrode active material includes: a first step of placing in a heating furnace, a first container in which a mixture of a lithium oxide, a fluoride and a magnesium compound is put; a second step of bringing the inside of the heating furnace into an oxygen containing atmosphere; and a third step of heating the inside of the heating furnace. The first step and the second step are executed and then, the third step is executed. It is preferable that the inside of the heating furnace is brought into the oxygen containing atmosphere before heating the inside of the heating furnace. It is more preferable that the fluoride is lithium fluoride and the magnesium compound is magnesium fluoride.SELECTED DRAWING: Figure 1

A positive electrode active material comprises secondary particles, wherein each of the secondary particles includes primary particles, and each of the primary particles includes an olivine-type phosphate compound and lithium zirconate.