33 results about "Soluble oxalate" patented technology

The invention relates to the technical field of preparation of a monodisperse powder material, and provides a controllable preparation method of monodisperse copper oxalate powder. The method comprises the following steps: uniformly mixing a soluble copper salt solution, a soluble oxalate solution and an ethylenediamine tetraacetic acid (EDTA) solution in a molar ratio of 1:1:(0-1):1:5; standing in certain temperature condition; filtering, washing and drying to obtain the monodisperse copper oxalate powder. The method provided by the invention has the following beneficial effects: operation iseasy, monodispersity of copper oxalate is high, large-scale preparation is easy to implement, and preparation can be performed at room temperature; accurate control on the size of copper oxalate particles is realized, and the size can be controlled to 2-4 microns; the monodisperse copper oxalate powder can serve as a precursor and can be subjected to thermal decomposition to obtain copper oxide,cuprous oxide and metal copper powder.

The invention belongs to the technical field of surface enhancement and protective treatment of marble or wood-based panels, and in particular relates to a polishing liquid, a preparation method and an application. The polishing solution comprises pH regulator, soluble oxalate, lubricant, fluorosilicate, nano titanium dioxide, nano silicon dioxide, coupling agent, palm wax emulsion and / or paraffin wax emulsion and water. The polishing liquid of the present invention is applied to the surface of marble or wood-based panels. Under a series of physical and chemical actions, a thick layer of dense glass-like bright substance can be formed on the surface. This glass-like bright substance is hard and has good wear resistance and weather resistance. The surface of the floor forms a bright mirror effect of "a puddle of water", which is easy to repair after the surface is scratched. When polishing the surface of marble or wood-based panels, just pour the polishing solution on the marble or wood-based panels and throw it away with a polishing pad. There is no need to use polishing steel wool, which improves production efficiency, saves costs, and improves polishing brightness.

The invention discloses a lithium-rich manganese-based positive electrode material with controllable appearance and dimensions and a preparation method therefor. The general formula of the positive electrode material is xLi<2>MnO<3>.(1-x)LiMO<2> (M is one or more of Mn, Ni or Co, and x is greater than 0 and less than 1); the preparation method comprises the following steps of adding a soluble transitional metal into a solvent and stirring into a uniform solution; then adding a surfactant to the solution, stirring uniformly and then adding a soluble oxalate solution; next, performing a co-precipitation reaction at a normal temperature to obtain an oxalate precursor; and performing pre-sintering on the precursor and then mixing with a lithium salt uniformly, and finally, performing a high-temperature solid-phase reaction to obtain the lithium-rich manganese-based positive electrode material. The obtained positive electrode material is uniform in granule grain diameter distribution, high in degree of crystallinity, controllable in appearance and dimensions, excellent in cycling performance and high in rate capability; and in addition, the method is simple in operation, and green and environment friendly.

The invention discloses a process for producing high-purity basic magnesium carbonate from dolomite, which adopts a carbonization method and uses dolomite as a raw material. The method comprises the following steps: grinding, calcining, digesting the calcined dolomite, filtering, carbonizing magnesium emulsion, pyrolyzing a heavy magnesium solution, and drying to obtain basic magnesium carbonate.The carbonization process of the magnesium emulsion is as follows: after the magnesium emulsion is cooled, carbon dioxide is introduced; when the pH value reaches 7.5-9.5, oxalic acid or soluble oxalate is added to ensure that the concentration of oxalate groups in the system is 0.001-0.01mol / L; and after the system is mixed evenly, carbonization is performed continuously until the pH value is 6.5-7.0, filtration is performed, the filtrate is the refined heavy magnesium solution, and the residue is light calcium carbonate. By adding oxalic acid in the digesting process, the technical problem of the dolomite carbonization method that calcium and magnesium are difficult to separate thoroughly can be solved. The process is simple, is easy to control and has high magnesium oxide extraction rate and high product purity.

The invention belongs to the field of preparation of inorganic non-metallic materials, and in particular relates to a preparation method of hydrated barium oxalate (BaC2O4·0·5H2O) microcrystals with the appearance of firewood. At 50°C, aging for 2-24 hours, then filtered, washed, and dried to obtain hydrated barium oxalate microcrystals. The soluble divalent barium salt of the present invention is one or a mixture of barium chloride, barium nitrate or barium acetate, and the soluble oxalate is one or a mixture of sodium oxalate, potassium oxalate or ammonium oxalate. The process of the invention is simple and easy, high in purity, low in impurity content, good in dispersibility and low in cost, and the obtained product has a diameter of 1-3 mm and a length of 5-15 mm. The hydrated barium oxalate crystallite with the appearance of firewood prepared by the invention can be widely used in the fields of automobiles, electronics, machinery, chemical industry, construction and the like, and is also an excellent precursor for preparing other barium salt functional materials.

Disclosed herein are oxalate inducing enzymes with pH and thermal stability and methods of using for treatment of oxalate related conditions for in food processing.

The invention belongs to the technical filed of production of metal oxide semiconductor thin film materials, and concretely relates to a production method for depositing an iron oxide film on ITO conductive glass. The method is a simple production method for depositing the highly-transparent, uniform and stable iron oxide film on the ITO conductive glass. The iron oxide film is deposited on the ITO conductive glass through a hydrothermal technology by adopting soluble ferric salt and soluble oxalate as raw materials. The iron oxide film obtained in the invention is very uniform, has good light transmission performance and can be firmly combined with a substrate. The raw materials used in the invention are simple and cheap, and the raw materials and reaction raffinate have no pollution, so large scale industrial application does not generate the pollution problem. The method has the advantages of simple process operation, low requirements on a device, small energy consumption, and convenient and flexible control of the film.

The invention discloses a preparation method of a lithium ion battery Cu / LiF composite cathode material. The method comprises the following steps: firstly, dissolving soluble copper salt and lithium salt in distilled water to be prepared into a solution I and dissolving soluble oxalate and NH4F in distilled water to be prepared into a solution II; then, adding the solution I into the solution II to perform precipitation reaction and separating a suspension to obtain solid separated matter; finally, sintering the obtained solid separated matter in an inert atmosphere furnace to obtain a Cu / LiFcomposite cathode material. Compared with the prior art, the preparation method disclosed by the invention has the advantages of simple preparation technology, low sintering temperature and the like;furthermore, a process is easy to control, and the purity of an obtained product is high; the defect of poor lithium of a CuF2 cathode material is solved, use of hydrofluoric acid with strong corrosion and poison is avoided, and the defects of complex equipment, high energy consumption and the like of a high energy ball milling method and a pulsed laser deposition method are overcome.