8 results about "Cobaltous sulfate" patented technology

The invention provides a method for removing phosphorus from a cobalt sulfate solution. The method comprises the following steps: providing a cobaltous sulfate solution to be treated; the method comprises the following steps: mixing a to-be-treated cobaltous sulfate solution, a composite polymer soluble ferric salt and a coagulant aid, carrying out precipitation reaction, and separating to obtain phosphorus-containing slag and cobaltous sulfate primary purified liquid; a deep phosphorus removal adsorbent is adopted to adsorb trace phosphorus in the cobalt sulfate primary purification liquid, then trace iron in the cobalt sulfate primary purification liquid generates precipitates in an oxygen-containing atmosphere, and after separation, a cobalt sulfate secondary purification liquid is obtained. According to the method, firstly, the synergistic effect of the composite polymer soluble ferric salt and the coagulant aid is adopted, and primary efficient removal of phosphorus is achieved; then, a deep phosphorus removal adsorbent is used for directionally adsorbing trace phosphorus in the cobalt sulfate primary purification liquid, so that deep removal of phosphorus is further realized; and finally, the residual trace iron is precipitated and separated in the oxygen-containing atmosphere, so that the purity of the secondary purified cobalt sulfate liquid is further guaranteed.

The invention discloses a cobalt sulfate solution purification copper and nickel removal ion exchange device which comprises a reaction tank, a stirring mechanism is arranged on the inner wall of the upper end of the reaction tank, a separation mechanism is arranged at the lower end of the reaction tank and comprises a separation bin, and a liquid separation cavity is formed in one side of the inner wall of the separation bin. And a solid separation cavity is formed in the other side of the inner wall of the separation bin. The invention belongs to the technical field of ion exchange, and aims to solve the problem that in the prior art, solid and liquid cannot be cleaned out after separation, so that the operation of a device is troublesome. The ion exchange device for purifying and removing copper and nickel from the cobaltous sulfate solution has the technical effects that after separation, solids and liquid can be cleared out more quickly, residual residues and residues generated by ion exchange are convenient to separate from the ion exchange solution, and the efficiency of purifying and removing copper and nickel from the cobaltous sulfate solution is effectively improved.

This invention relates to the field of sodium-ion battery technology and discloses a method for preparing a modified sodium vanadium phosphate cathode material, comprising the following steps: Step 1: Add 1-4g of ammonium metavanadate and 0.8-2.6g of oxalic acid to 50-200mL of deionized water, stir and react at 60-120℃ for 20-80min, and after slight cooling, add sodium phosphate; after stirring, add cobalt sulfate heptahydrate, and then dry and grind the solution to obtain precursor powder. Step 2: Calcine the precursor powder in a high-temperature tubular furnace at 600-1200℃ for 8-24h to obtain the modified sodium-ion battery cathode material powder. This invention uses a chemical synthesis method to prepare the precursor and employs an energy-saving calcination process to prepare a cobalt particle-filled sodium vanadium phosphate cathode material for the first time. This process has the advantages of mild reaction conditions, high product purity, good particle size uniformity, and easy control of the proportion of each component, and can be continuously prepared and synthesized in large quantities.

The present application belongs to the technical field of magnesium-zinc magnesium alloy surface treatment, and particularly relates to a method for in-situ growth of different blue ceramic film layers on the surface of magnesium-zinc magnesium alloy. The method comprises the following steps: polishing and cleaning the surface of a magnesium-zinc magnesium alloy sample, then sequentially performing first alkali washing, first water washing, first acid washing, second water washing, second acid washing, third water washing and second alkali washing on the surface of the sample to obtain a pretreated magnesium alloy; placing the pretreated magnesium alloy in an electrolyte for micro-arc oxidation treatment to in-situ generate a blue ceramic film layer on the surface of the magnesium alloy; the electrolyte is a fluorotitanic acid potassium and cobalt sulfate added in a silicate and phosphate composite electrolyte system; or the electrolyte is a fluorotitanic acid potassium added in a phosphate electrolyte system. The present application prepares different blue ceramic film layers, which can improve the ornamental property of magnesium-zinc magnesium alloy components and improve the visual effect.

The utility model discloses a cobaltous sulfate solution extraction device which comprises an extraction cylinder, a transmission mechanism is arranged above the extraction cylinder, the transmission mechanism comprises a stirring shaft used for stirring materials, one end of the stirring shaft is sleeved with a gear, and the other end of the stirring shaft is provided with stirring blades; the gear disc is fixedly arranged below the motor and is meshed with the gear; one end of the connecting rod is connected with an output shaft of the motor, and the other end of the connecting rod is connected with the stirring shaft; the universal ball is located in the center of the isolation plate, and the stirring shaft penetrates through the center of the universal ball. The transmission mechanism is arranged in the extraction barrel, and the stirring shaft is driven by the motor to drive the stirring blades to synchronously rotate in the extraction barrel during use, so that efficient rotation control on the stirring shaft can be realized, liquid in the extraction barrel is fully stirred and mixed, and the mixing efficiency of liquid extraction is improved; the problem of incomplete extraction and precipitation caused by non-uniform mixing is avoided.

The invention discloses a foamed nickel-based heterostructure electro-catalytic material, which is characterized in that thiourea, cobaltous sulfate, sodium hypophosphite and ammonium fluoride are used as reaction raw materials, and the nickel-based electro-catalytic material with a heterostructure is prepared on a foamed nickel substrate through a two-step hydrothermal method; the invention further discloses a preparation method of the foamed nickel-based heterostructure electro-catalytic material and application of the electro-catalytic material. The electrocatalytic material prepared by the two-step hydrothermal method provided by the invention effectively improves the selectivity problem of the foamed nickel-based heterostructure electrocatalytic material in the electrochemical oxidation process of 5-HMF, and realizes higher conversion efficiency, product yield and Faraday efficiency at lower reaction potential.

The invention relates to the technical field of metal powder metallurgy, and discloses a production method for low-apparent-density iron-copper-tin-cobalt alloy powder, which can effectively reduce the cost and realize controllable production. The production method of the low-apparent-density iron-copper-tin-cobalt alloy powder comprises the following steps: S1, selecting low-apparent-density iron powder as a precursor, feeding the precursor into a reaction kettle in which an acid solution is added, and carrying out surface pretreatment to prepare a metal core; s2, the prepared copper salt solution is guided into a reaction kettle with the surface pretreated to be subjected to copper metal replacement coating; s3, on the basis of the copper-coated iron powder, a stannous sulfate solution and a cobaltous sulfate solution are introduced, tin and cobalt are deposited through the replacement effect, and multi-component composite powder is formed; and S4, washing and drying the completely coated product to obtain the low-apparent-density copper-iron-tin-cobalt pre-alloyed powder. The production method of the low-apparent-density iron-copper-tin-cobalt alloy powder is simple and controllable in process, and the requirement of large-scale industrial production can be well met.

The invention provides a preparation method of a battery-grade cobalt sulfate solution, which comprises the following steps: mixing crude cobalt hydroxide with water to obtain crude cobalt hydroxide slurry, adding acid into the crude cobalt hydroxide slurry to adjust the pH value to be below 8, carrying out magnesium removal reaction, and carrying out solid-liquid separation to obtain a magnesium-removed solid product; mixing the magnesium-removed solid product with water, and adding acid and a reducing agent for acid dissolution to obtain an acid-soluble solution; the acid solution is subjected to iron removal, calcium and magnesium removal and fluorine removal, and fluorine-removed liquid is obtained; and extracting the fluorine-removed liquid by adopting a P204 extracting agent to obtain raffinate, and removing oil from the raffinate to obtain the battery-grade cobalt sulfate solution. According to the method, high-impurity raw materials with high Mg and Ca content can be treated through acid pickling magnesium removal, acid dissolution, iron removal, calcium and magnesium removal through fluorination, deep fluorine removal, P204 extraction refining and oil removal, the cost can be reduced, and the battery-grade cobalt sulfate solution with low impurity content is obtained.