67results about "Cobalt halides" patented technology

The invention relates to three-ingredient eutectic ionic liquid and a preparation method thereof. The three-ingredient eutectic ionic liquid consists of ILX, MH and HBD, wherein ILX is ionic liquid with negative-monovalent halogen ions which serve as negative ions, MH is transition metal haloid, and HBD is a compound with multiple hydrogen bonds. The preparation method comprises the following steps of: uniformly mixing ILX, MH and HBD according to the molar ratio of 1: 1: n (n= 0.5-4), heating up to the temperature of 100-140 DEG C, and then, carrying out heat preservation for 2-4 hours until a mixture is completely dissolved. According to the ionic liquid disclosed by the invention, the melting point is extremely low, the viscosity is low, the conductivity is high, the dissolution performance is good, and the ionic liquid has Lewis acidity and catalysis performance, so that the ionic liquid can be widely applied to organic synthesis reaction, the preparation of nano and mesoporous materials, gas absorption and the like; and the preparation process is simple, the raw materials are readily available, the cost is low, no organic solvents are used and no toxic substances are emitted during reaction, no byproducts are produced, and the ionic liquid is biodegradable, so that the ionic liquid is suitable for industrial production.

The invention discloses a process for recovering cobalt chloride from a waste lithium ion battery. The process comprises the following steps: dismantling the waste lithium ion battery through a dismantling machine, separating a positive plate, diaphragm paper, a copper-containing negative electrode and an aluminum shell; pyrolyzing and ball-milling the positive plate, adding sodium hydroxide in the ball-milled positive plate, filtering out obtained sediment substance, carrying filter-pressing, adding 1-3mol/l of hydrochloric acid solution to react to obtain aluminum hydroxide, adding one of sulfuric acid or hydrogen peroxide in supernatant to perform leaching reaction; removing iron in leachate, and adding sodium hydroxide to secondarily remove aluminum and iron to obtain a cobalt-containing solution; extracting and removing impurity in the obtained cobalt-containing solution, extracting and separating the obtained extract liquor through P507, re-extracting the obtained cobalt-containing solution to obtain the pure cobalt solution; crystallizing and washing the obtained pure cobalt solution to obtain cobalt chloride. According to the process disclosed by the invention, the operation is simple, the use is convenient, the useful material in the lithium ion battery can be effectively recovered; and the resource is reasonably utilized.

An impurity gettering device can be installed between a source and a reactor to reduce an impurity from a fluid before it reaches the reactor. More particularly, the impurity gettering device can getter an inorganic, polar, hydrogen-containing impurity (e.g., H₂O, NH₃, etc.) from a halogen-containing fluid (e.g., a fluorine-containing liquid or gas) by forming ligands to a metal-containing compound to form a complex. In one example, a fluid source may include HF and H₂O, which can flow through the impurity getting device that includes COF₂. The COF₂ can getter the H₂O and form CoF₂.ZH₂O, where Z is an integer. The fluid may become anhydrous HF that can be processed by a reactor, such as an electrolytic cell. By removing H₂O before the fluid reaches the electrolytic cell, adverse effects of H₂O, such as consumption of a carbon anode, particle generation, etc. can be reduced.

The invention discloses a method for preparing tungsten carbide and cobalt chloride by tungsten-containing waste. The method comprises the following steps: adding water into tungsten-cobalt waste for ball milling; dissolving out metal impurities in the tungsten-cobalt waste with hydrochloric acid; adding water to stir, adding a catalyst and a defoaming agent, and keeping on reacting; performing acid pickling, removing supernatant, performing filter-pressing on lower slurry, washing filter residue tungsten sulfate with clean water for multiple times, and drying; adding sodium carbonate into the pickling solution, adding iron powder, filtering copper residues, adding sodium sulfate, hydrogen peroxide and sodium carbonate into the copper-removed solution to precipitate and separate iron in a mode of sodium jarosite, filtering iron residues, adding barium chloride into the iron-removed solution, precipitating sulfate ions, performing filter-pressing, pumping filtrate into a graphite crucible for evaporating and concentrating, cooling and crystallizing. The method is simple in process and convenient to operate, the tungsten-cobalt waste can be recycled, the tungsten-cobalt recovery rate is high, and energy consumption is low; and the whole process realizes zero emission of waste water, can be used for effectively treating waste gas, and is environmentally friendly.

The invention relates to a preparation method of cobaltic fluoride particles, and belongs to the technical field of fluorination catalyst. The preparation method comprises following steps: cobaltous chloride, zinc chloride, aluminium trichloride, and caustic soda are reacted so as to obtain a hydroxide; the hydroxide is subjected to pressing so as to obtain particles, and the particles are subjected to roasting so as to obtain a mixture of cobalt oxide, zinc oxide, and aluminium oxide crystals which is a fluorating agent precursor; the fluorating agent precursor is reacted with anhydrous hydrogen fluoride, and then is reacted with fluorine gas so as to obtain the cobaltic fluoride particles. The fluorating agent precursor extremely high in mechanical strength and stability is prepared firstly, and then the cobaltic fluoride particles are prepared, so that cobaltous fluoride efflorescence problem is solved, cobaltous fluoride is converted into cobaltic fluoride effectively, and cobalticfluoride fluorination efficiency is high.

The invention provides a PAFC (polyamuminum ferric chloride) liquid product and a preparation method thereof. According to the preparation method of the PAFC liquid product, during stirring, a sodium hydroxide solution is added to an aluminum chloride and ferric chloride mixed solution in a spray form, precipitate caused by excessive high local pH can be effectively avoided, the time required for preparation of the PAFC liquid product is greatly shortened, meanwhile, the PAFC liquid product with high concentration can be prepared from reaction raw materials with higher concentration, and a large amount of energy can be saved for the following drying procedure. The PAFC liquid product has higher concentration and higher basicity than those of conventional PAFC liquid products in the prior art and can meet higher use requirements as a liquid product, and a large amount of energy can be saved for the following drying procedure in production of solid products.

The invention discloses a method for preparing a nano Co2(OH)3Cl gas sensitive material by an ultrasonic-microwave hydrothermal method. The method comprises the following steps: dissolving cobalt acetate tetrahydrate into deionized water to prepare a solution A; adding A TiCl3 hydrochloric acid solution to the solution A, and then carrying out ultrasonic pretreatment to obtain a precursor B; adjusting the pH value of the precursor B to 3.0-11.0; adding to a reaction kettle, reacting under the microwave hydrothermal condition; after reaction is ended, centrifugally collecting a product in the reaction system obtained from the reaction kettle and washing, thereby obtaining the nano Co2(OH)3Cl gas sensitive material. The nano Co2(OH)3Cl gas sensitive material prepared by the method is applied to fabrication of a gas sensitive element, so that the method is simple in process, low in energy consumption and high in synthetic efficiency; and the prepared material is small in particle size and uniform in distribution, and can be applied to fabrication of the gas sensitive element.

A process for producing nickel-cobalt salt and ammonium salt through continuous crystallization comprises the following steps: a salt-containing solution is concentrated to be close to a saturated state through a multi-effect evaporation device or an MVR evaporation device, the concentrated salt-containing solution enters a vacuum crystallization tank and then is subjected to flash evaporation cooling, salt crystals are separated out while feed liquid circulates in the vacuum crystallization tank, and slurry is obtained; then the secondary steam generated by the vacuum crystallizing tank exchanges heat with circulating cooling water or chilled water through a surface air cooler to be cooled to obtain condensate water and a small amount of non-condensable steam, and the non-condensable steam is pumped out through a vacuum pump or a steam jet pump; finally, the slurry obtained by the vacuum crystallization tank is pumped to the crystallization buffer tank and then sent to the centrifugalmachine by the crystallization buffer tank, and crystals obtained by centrifugal dehydration are dried by the drying bed to obtain crystal products with uniform granularity.

The invention relates to a steam application technological process in the process for preparing the crystal cobalt chloride by cobalt chloride solution. A first heat exchanger, a second heat exchanger, a set of triple heat exchanger composed of three heat exchangers and a vacuum cooling system are added in the prior process. The steam is utilized at maximum extent, the enterprise production cost is saved and the outfall steam pollution is decreased.

The invention provides a method for preparing a reagent cobalt chloride hexahydrate. The method comprises the following steps of: reacting a metal cobalt slice with a concentrated nitric acid so as to generate a cobalt nitrate, directly reducing the cobalt nitrate by using formaldehyde in the condition of the esistence of hydrochloric acid so as to remove the nitrate radical to generate a cobalt chloride solution, filtering, concentrating and cool crystallizing so as to acquire the cobalt chloride hexahydrate. The method of the invention generates no other impurities except the target products, gas and water in the reaction process, and can obtain pure cobalt chloride hexahydrate. The products acquired by using the method meet the analytically pure standard of GB/T 1270-1996 chemical reagent cobalt chloride hexahydrate. The method has the advantages of simple operation, rapid reaction, short producing flow, high production efficiency, mild process condition, easily controlled property and application in mass commercial process.

The invention discloses a preparing method of waterless chlorinate and industrial alcaine with low water cobalt chloride (CoCl2.H2O-CoCl2.3H2O), hydrogen gas and chlorine gas as raw material, which comprises the following steps: using high temperature hydrochloride gas generating by burning hydrogen gas and chlorine gas; carrying low chlorinate into pyrolytic reactor; transferring heat with high temperature hydrochloride gas; generating pyrogenic reactor under the catalysis of electromagnetic wave through the pyrolytic reactor; getting waterless chlorinate and water vapor; entering part gas phase material into hydrochloride synthetic furnace through air-solid segregation; proceeding cyclical usage; displacing left gas phase material into hydrochloride recovery system; getting industrial alcaine.

The invention relates to a preparation method of superior pure cobalt chloride. The preparation method comprises the following steps of: (1) reacting metallic cobalt with hydrochloric acid; (2) removing impurities, adding hydrogen peroxide into a cobalt chloride solution obtained in the step (1), oxidizing to remove iron, adjusting the solution by using ammonia water until the PH value is 8-9 so as to ensure that ferric hydroxide precipitates completely, standing for 3-5 hours, and filtering to obtain the solution; and (3) pouring the solution obtained in the step (2) into a glass beaker, adjusting the hydrochloric acid until the PH value is 3-3.5, concentrating at the concentrating temperature of 170-190 DEG C, and when the concentration of the concentrated solution is 38-40 degree/BE, stopping heating, cooling and crystallizing, and centrifuging for separation to obtain the superior pure cobalt chloride. The preparation method comprises the following steps of: reacting metallic cobalt with the hydrochloric, regulating the PH value by adding the hydrogen peroxide and the ammonia water, and removing metal cations, so that precipitation of hydroxide is generated and the superior pure cobalt chloride is prepared.

Method embodiments useful for recycling spent lithium-ion battery (LIB) electrodes to extract critical and/or valuable elements from LIBs are provided and involve mechanochemical processing of spent LIB electrodes in the presence of certain chemical agents to recover products that can include, but are not limited to, metallic solids such as elemental metals or metal alloys, and/or inorganic compounds, metal salts, or organometallic derivatives. The desired products can be separated from by-products and contaminants and further processed into LIB electrode materials or/and other substances.

Disclosed in a positive active material for a lithium secondary battery including a compound represented by formula 1 and having a 10% to 70% ratio of diffracted intensity of diffraction lines in 2θ=53° (104 plane) with respect to diffracted intensity of diffraction lines in the vicinity of 2θ=22° (003 plane) in X-ray diffraction patterns using a CoKα-ray,

Li_xCoO_2-yA_y  (1)

wherein, x is from 0.90 to 1.04, y is from 0 to 0.5, and A is selected from the group consisting of F, S and P.

The invention discloses a method for producing high-purity cobalt chloride by utilizing cobalt carbonate defective products. The method comprises the following steps: adding defective cobalt carbonateand water into a reaction kettle and pulping; then adding acid to regulate the pH (Potential of Hydrogen) to sufficiently dissolve the cobalt carbonate; then adding the cobalt carbonate to inverselyregulate the pH; after carrying out filter pressing, obtaining a first cobalt chloride solution; adding the cobalt chloride solution into the reaction kettle capable of being heated and being stirredand improving the temperature to 80 to 90 DEG C; under the condition of sufficiently stirring, slowly adding a sodium hydroxide solution to adjust the pH to ensure that the solution contains enough hydroxyl ions and aluminum ions are sufficiently hydrolyzed; when the pH is completely stable, slowly adding an excessive amount of ammonium fluoride to ensure that magnesium ion sediment is completelyremoved; carrying out heat insulation and stirring; after filtrating, obtaining a high-purity cobalt chloride solution. The method disclosed by the invention has a simple technology and low productioncost; the recovery rate of cobalt reaches 99 percent or more and reaches battery-grade standards.

The invention provides a preparation method and use of Cox(OH)yM, wherein M is F or Cl or PO4<3->, CoMa.nH2O is added to an organic alcohol amine solution and stirred until completely dissolved to obtain a mixture; and the mixture is transferred to an autoclave for hydrothermal reaction, and after the end of the reaction, a product is washed and dried to obtain the Cox(OH)yM, wherein M is F or Clor PO4<3->. A low temperature hydrothermal method is adopted in the preparation process, and the steps are simple and easy to operate. The product prepared by the method has large specific surface area, uniform size, and good electrochemical energy storage performance, and can be used as a negative electrode material for high performance lithium ion batteries.

The invention provides a preparation method of cobalt trifluoride, which comprises the following steps: step 1, mixing cobalt difluoride with ammonium salt in a weight ratio of (20-60):1; 2, feeding the reactants into a reaction kettle, and feeding fluorine gas to carry out fluorination reaction. According to the preparation method, cobalt difluoride and ammonium salt are mixed and then fed into areaction kettle before fluorination production, so that the fluorine consumption is reduced, and the content of cobalt trifluoride in a final product is increased. The content of cobalt trifluoride in the produced cobalt trifluoride product can reach 95.81%, and the content of cobalt difluoride does not exceed 5%.

According to the embodiments of the present invention, a gel is provided. The gel has a composition including clay nanoparticles and a halide perovskite material of the general formula AMX3, where A may be an organic or inorganic ion, M may be a metal cation or element, and X may be a halogen anion or element, such as methylammonium lead iodide (CH3NH3Pbl2). According to further embodiments of thepresent invention, a method of forming a gel, a photovoltaic device and a method of forming a photovoltaic device are also provided.

The invention discloses a crystallization method for a cobalt chloride solution. The method comprises the following steps: evaporating and concentrating the cobalt chloride solution; cooling the evaporated and concentrated cobalt chloride solution in a water bath kettle to enable cobalt chloride crystal grains to naturally grow, and turning off the water bath kettle when the temperature of the water bath kettle is lowered to 30 to 35 DEG C; performing natural grain growth on the naturally growing cobalt chloride crystal grains at room temperature for 15 to 20h, and performing suction filtration to obtain a cobalt chloride crude product; performing liquid-solid separation when the temperature of the cobalt chloride crude product is lowered to 20 to 25 DEG C, naturally air-drying the cobaltchloride crude product subjected to liquid-solid separation to obtain a refined cobalt chloride product of which the particle sizes are relatively large and the quality accords to a national standard.The crystallization rate of the obtained cobalt chloride product can reach 60 to 75 percent and, in addition, the crystal grains are uniform in size and crystal color.

A preparing method of a cobalt chloride solution is disclosed. The dissolution speed of metal cobalt in an acid is largely increased by a manner of selecting an electronic trapping agent, thus achieving the objective of rapidly preparing the cobalt chloride solution from the metal cobalt. The method is prone to industrial production, low in cost, and environmental friendly in processes. A product of the preparing method is low in impurity contents, so that impurity removing load in subsequent production processes of cathode materials is reduced.