647 results about "Cobalt Sulfate" patented technology

The invention discloses a method for comprehensively recycling valuable metals from a spent lithium ion battery. The method comprises the following steps: carrying out electric discharge treatment on a spent battery, crushing, pre-roasting at 300-400 DEG C, adding a reducing agent, and carrying out reduction roasting at 450-700 DEG C; carrying out water extraction and evaporative crystallization on fine aggregates obtained through the reduction roasting, so as to obtain a high-purity lithium product, leaching copper, nickel and cobalt from leached slag and roasted lump materials by virtue of ammonia oxide, carrying out magnetic separation and sieving on ammonia leaching slag so as to obtain iron and aluminum enriched products, and carrying out reduction acid leaching, purification and edulcoration on sieved products, so as to obtain a high-purity manganese sulfate solution; and carrying out extraction and selective reverse extraction on ammonia leaching liquid, so as to obtain a high-purity nickel sulfate solution and a high-purity copper sulfate solution, and carrying out vulcanization cobalt precipitation, oxidation acid leaching and extraction purification on raffinate, so as to obtain a high-purity cobalt sulfate solution. The method is high in extraction rate of valuable metals and applicable to the treatment of multiple waste lithium ion battery raw materials and efficient utilization of multiple elements, and sorting is not required.

The invention discloses a method for preparing lithium nickel cobalt manganese oxide by taking a waste lithium ion battery as a raw material. The method is mainly characterized in that a waste lithium ion battery taking the lithium nickel cobalt manganese oxide, lithium nickel cobalt oxide and so on as a battery positive material is selected as the raw material and is pretreated through disassembly, separation, crushing, screening and so on, and then processes such as adhesive removal at high temperature and aluminum removal by sodium hydroxide are adopted to obtain an inactivated positive material containing nickel, cobalt and manganese; then a sulfuric acid and hydrogen peroxide system is adopted to leach, and P204 is adopted to remove impurities by extraction to obtain pure nickel, cobalt and manganese solution, and proper manganese sulfate, nickel sulfate or cobalt sulfate is blended to ensure that the mol ratio of nickel, cobalt and manganese elements in the solution is 1: 1: 1; and then ammonium carbonate is adopted to adjust the pH value to form a nickel cobalt manganese carbonate precursor, and then a proper amount of lithium carbonate is blended for high temperature sintering to synthesize a lithium nickel cobalt manganese oxide battery material. The first discharge capacity of the material is 150 mAh/g, the discharge capacity is still kept more than 130mAh/g after the circulation for 30 times, and the material has good electrochemical performance.

The invention provides a comprehensive recycling method of a waste and old lithium-ion battery, and relates to the lithium-ion battery. The method comprises the following steps of: performing explosion-proof magnetic smashing and atomized spraying smashing on the waste and old lithium-ion battery, thereby separating an outer shell and a battery material; carbonizing and roasting in a constant-temperature roaster at high temperature and under negative pressure, thereby removing an isolated membrane and a cathode; recycling the outer shell and an anode material in a grading manner by using a centrifugal disintegrator, thereby separating the outer shell and the anode material containing nickel and cobalt; leaching out by adding sodium sulfite into H2SO4 at the normal pressure by utilizing the characteristics of the anode material; regulating the pH value by adding carbonate into an leaching liquid; preliminarily removing Ca and Mg by adding a fluoride salt; extracting and removing impurities by using P2O4, thereby removing the impurities such as Fe, Cu, Zn, Ca, Mg and the like; performing selective extraction for cobalt-nickel separation by using P507, thereby obtaining a high-purity nickel sulfate solution and a high-purity cobalt sulfate solution in which the content of the Fe, the Cu, the Zn, the Ca and the Mg is respectively less than or equal to 2.0mg/L. The method is efficient, simple and convenient and low in production cost, and has wide applicability and a high additional value.

The invention relates to a method for preparing a ternary cathode material precursor by recycling a lithium-ion battery material. The method comprises the following steps: recycling a lithium-ion battery cathode material with sulfuric acid and hydrogen peroxide to obtain a first solution; adjusting the pH value of the first solution to be 5-6.5, adding a filter aid and filtering out impurities to obtain a second solution; adding nickel sulfate, cobalt sulfate and/or manganese sulfate to the second solution, adjusting the molar ratio of nickel to cobalt to manganese to be (0.4-0.6) to (0.1-0.3) to (0.2-0.4) to obtain a third solution; adding a complex precipitant to the third solution, adjusting the pH value of the third solution to be 7-9, and reacting to obtain a nickel-cobalt-manganese ternary material precursor sediment; and washing and drying the nickel-cobalt-manganese ternary material precursor sediment to obtain the ternary cathode material precursor. The method is high in recovery rate; the recycling process is simple; and the prepared ternary cathode material precursor is high in purity, small in particle size, narrow in distribution and even to mix.

The invention provides a method for preparing a ternary positive electrode material through recovering a waste ternary lithium battery. The method comprises the following steps of 1) mixing pretreatednickel cobalt lithium manganate waste positive electrode powder with sulfate, and roasting to obtain a roasted product; 2) immersing the roasted product in water to obtain water immersion liquid andwater immersion slag; wherein the water immersion liquid contains lithium salt; 3) reacting the water immersion slag with an acid solution and hydrogen peroxide to obtain a nickel-cobalt-manganese leaching solution; 4) removing impurities from the nickel-cobalt-manganese leaching solution, then extracting cobalt, manganese and nickel, and saponifying and reversely extracting obtained organic phaseto obtain a nickel sulfate solution, a cobalt sulfate solution and a manganese sulfate solution; and 5) co-precipitating the nickel sulfate solution, the cobalt sulfate solution and the manganese sulfate solution with a sodium hydroxide solution and ammonia water, mixing obtained precursor with lithium carbonate, sintering, and screening iron to obtain the ternary positive electrode material. According to the method, lithium is extracted firstly, so that the influence of a lithium element on subsequent nickel-cobalt-manganese extraction is reduced, the impurity content in the ternary positiveelectrode material is reduced, and the recovery rate of nickel-cobalt-manganese is greatly improved; and meanwhile the recovery rate of the lithium can be improved.

The invention provides a boiler coal combustion-improving desulfurizing and denitrifying agent composition. The composition comprises the following raw materials in parts by weight: 2-7 parts of sodium carbonate, 1-3 parts of alumina, 2-8 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 2-6 parts of ferric oxide, 3-10 parts of potassium permanganate, 3-10 parts of potassium chlorate, 10-35 parts of activated attapulgite clay, 15-30 parts of urea, 2-4 parts of ammonium formate, 2-4 parts of ammonium chloride, 6-23 parts of ammonium acetate, 3-9 parts of manganese oxide, 9-12 parts of copper chloride, 1-3 parts of copper oxide, 2-4 parts of zinc sulfate, 1-3 parts of zinc nitrate, 7-18 parts of potassium dichromate, 1.0-1.5 parts of titanium dioxide, 0.5-1.0 part of barium molybdate, 0.5-1.5 parts of cobalt sulfate, 0.5-1.5 parts of vanadium pentoxide, 0.3-0.7 part of cerium oxide, 0.1-0.2 part of sodium dodecyl benzene sulfonate and 0.1-0.2 part of alkyl glyceryl ether. The composition is convenient to use, has stable properties, plays roles of combustion improving, desulfurization and denitrification, has coal saving rate of 8-25% and can remove fixed sulfur by 50-70%.

A feed additive for relaxing the hot stress reaction of milk cow in the summer is prepared from organochromium, cultured yeast, nicotinic acid, VA, VD, VE, sodium selenite (or yeast selenium), copper sulfate, zinc sulfate, cobalt sulfate, calcium iodate, manganese sulfate, etc.

A method for preparing nickel/manganese/lithium/cobalt sulfate and tricobalt tetraoxide from battery wastes adopts the following process: dissolving battery wastes with acid, removing iron and aluminum, removing calcium, magnesium and copper, carrying extraction separation, and carrying out evaporative crystallization to prepare nickel sulfate, manganese sulfate, lithium sulfate, cobalt sulfate or/and tricobalt tetraoxide. By using the method, multiple metal elements, such as nickel, manganese, lithium and cobalt, can be simultaneously recovered from the battery wastes, the recovered products are high in purity and can reach battery grade, battery-grade tricobalt tetraoxide can also be directly produced. The method is simple in process, low in, energy consumption and free in exhaust gas pollution, and can realize zero release of wastewater.

The disclosed embodiments relate to the manufacture of a precursor co-precipitate material for a cathode active material composition. During manufacture of the precursor co-precipitate material, an aqueous solution containing at least one of a manganese sulfate and a cobalt sulfate is formed. Next, a NH₄OH solution is added to the aqueous solution to form a particulate solution comprising irregular secondary particles of the precursor co-precipitate material. A constant pH in the range of 10-12 is also maintained in the particulate solution by adding a basic solution to the particulate solution.

The invention discloses a method for preparing battery-grade nickel sulfate and cobalt sulfate from mixed nickel cobalt hydroxide, and belongs to the technical field of nickel cobalt hydrometallurgy.The method comprises the following steps that the mixed nickel cobalt hydroxide is leached by using sulfuric acid, iron and aluminum in the solution are removed by using a nickel/cobalt/manganese-based neutralizer, liquid-solid separation is carried out to obtain iron-removed slag, nickel and cobalt are recycled through acid dissolution, a precipitator (one or more of nickel fluoride, and cobalt fluoride and manganese fluoride) is added into iron-removed liquid to remove calcium and magnesium ions in the system. Impurities such as Mn, Cu and Zn are removed from the calcium and magnesium removed liquid by using a saponified P204 extractant, nickel and cobalt are separated from the P204 raffinate by using a saponified P507 extractant to obtain battery-grade nickel sulfate and a cobalt sulfate solution, and evaporative crystallization is carried out to obtain a product. According to the method, the use amount of calcium oxide is greatly reduced, the amount of calcium ions introduced intothe system and the corresponding nickel-cobalt loss are greatly reduced, the influence of calcium sulfate crystallization on extraction is avoided, the P507 extraction operation amount is reduced, andthe purification cost is reduced.

The invention discloses a preparation method of a porous cobalt phosphide nanowire catalyst. The method comprises the following steps that a solution is prepared by taking urea as a precipitant, taking cobalt sulfate hepathydrate as a cobalt source and taking glycerin and deionized water as solvents; the solution is added into a high pressure reactor for a hydrothermal reaction, after sufficient reaction is achieved, suction filtration and washing are conducted, vacuum drying is conducted, and then linear basic cobalt carbonate is obtained; in a tubular furnace, air burning is conducted on the linear basic cobalt carbonate at certain temperature, and cobaltosic oxide is obtained; and sodium hypophosphite serves as a phosphorus source, a cobaltosic oxide precursor and sodium hypophosphite are placed at the two ends of the same porcelain boat according to a certain proportion, the phosphorus source is placed at the upper stream of airflow, the treated porcelain boat is put into the tubular furnace for lower temperature calcination in an inert atmosphere, and preparation of the porous cobalt phosphide nanowire catalyst is achieved. The preparation method of the porous cobalt phosphide nanowire catalyst has the advantages that the production technology is simple, the cost is low, electrochemical activity and stability of the catalyst can be effectively improved, and the method is wide in application.

The present invention discloses trivalent chromium color zinc coating passivator for passivation at normal temperature and its preparation process. The trivalent chromium color zinc coating passivator includes Cr3+ 1-7.5g/L, molybdate 1-25g/L, cobalt sulfate 5-15, ammonium bifluoride 1-8g/L, malonic acid 1-12g/L, phosphate 1-12 g/L, and silicate 0.2-6g/L. The trivalent chromium color zinc coating passivator solution has pH 1.8-2.3 regulated with sodium carbonate or nitric acid, passivating temperature of 20-35deg.c, passivating time of 30-60 sec and stoving temperature of 70-80deg.c. The present invention has the advantages of being practical and good use effect.

The invention discloses an electrolyte of a lead-acid accumulator and a preparation method thereof. The electrolyte comprises the following raw materials in part by weight: 25 to 45 parts of deionized water, 60 to 70 parts of dilute sulfuric acid solution, 1.8 to 2.8 parts of gas-phase nanometer silicon dioxide and 2.5 to 3 parts of electrolyte activating agent, wherein the electrolyte activating agent is prepared from the following raw materials in part by weight: 1,000 parts of deionized water, 2 parts of nickel sulfate, 2 parts of cobalt sulfate, 25 parts of aluminum sulfate, 15 parts of sodium sulfate, 25 parts of magnesium sulfate, 20 parts of aluminium phosphate, 5 parts of lithium iodide, 5 parts of lithium chloride and 20 parts of lithium carbonate. Because the nickel sulfate, the cobalt sulfate, the lithium chloride and the lithium carbonate are added into the electrolyte activating agent, the large current charge and discharge and the ultra-low temperature performance of the accumulator are increased by 25 to 30 percent, and the service life of the accumulator is prolonged by 25 to 30 percent compared with the traditional accumulator with the traditional electrolyte. Because of the adoption of the nanometer silicon dioxide and the adoption of high-speed shearing way in the preparation method, the prepared electrolyte does not settle down within 30 days.

The invention discloses a nickel-cobalt-manganese ternary precursor material and a synthetic method thereof. The method comprises the following steps: preparing a metal salt solution containing nickelsulfate, cobalt sulfate and manganese sulfate, and adding the metal salt solution, a sodium hydroxide solution and ammonium hydroxide into a synthesis reactor to synthesize a seed crystal; adding theseed crystal into a co-precipitation reactor for carrying out a co-precipitation reaction, wherein the co-precipitation reactor contains the metal salt solution, the sodium hydroxide and ammonium hydroxide, and controlling the seed crystal recycling times and reaction time of the co-precipitation reactor until the particle size reaches a preset value, thereby obtaining the nickel-cobalt-manganeseternary precursor material. According to the synthetic method of the nickel-cobalt-manganese ternary precursor provided by the technical scheme of the invention, the particles of small mean particlesize and high tap density can be successfully obtained, the defects of the prior art are overcome, any great influence on equipment and related operating parameters is avoided, and the aim of producing high-quality precursor materials can be achieved.

The present invention relates to a method for electroforming nickel-cobalt alloy, belonging to the field of electroforming technology. The optimum composition of its electroplating solution includes nickel sulfate 220g/l, nickel chloride 15 g/l, cobalt sulfate 45g/l, sodium chloride Ig/l, boric acid 30g/l and sodium louryl sulfate 0.4 g/l. The thickness of nickel-cobalt alloy coat of the conticaster crystallizer copper plate electroformed by said invention is 2.0-3.0 mm. The binding force of the coat and base body is strong, the service life of the crystallizer copper plate is long.

The invention discloses an extraction process for preparing electronic-grade cobalt sulfate from a cobalt-containing waste material, and relates to an extraction method for cobalt salt. The process comprises the following steps of: performing acidolysis; filtering and separating; removing iron and copper; preparing rough Co material liquid; removing impurities by P204 extraction; and separating Co and Ni by P507 extraction; and the process is characterized in that an N235 extracting agent is prepared from 8 to 12 volume percent of N235, 8 to 12 volume percent of 2-octanol and 76 to 84 volume percent of 206 solution oil; and the prepared N235 extracting agent is added into raffinate of the P204 extraction and is subjected to six stages of extraction, two stages of hydrochloric acid washing, six stages of washing, three stages of ammonia water washing and one stage of sulfuric acid washing. The process has good impurity removal effect; compared with the prior art, the process has the advantages that: one order of magnitude is reduced, particularly, impurities such as cadmium, lead and the like which are difficult to remove are removed by P204 extraction and the P507 extraction, and the impurities reach an extremely low degree. The process has short flow, the comprehensive recovery rate of cobalt is high and the production cost is lower than the average cost of the same domestic industry.

The invention discloses a method for recycling nickel-cobalt-manganese-lithium from waste power lithium ion battery black powder. The method comprises the steps of conducting leaching and filtering through a sulfuric acid and sulfur dioxide system, adding lime milk into filtrate, adjusting the pH to 10-12, controlling precipitation, and conducting filtering to obtain a nickel-cobalt-manganese enriched product and lithium-containing filtrate; conducting purifying and impurity removal on the lithium-containing filtrate, adding a sodium carbonate solution for precipitation of lithium to obtain lithium carbonate; leaching the nickel-cobalt-manganese enriched product through sulfuric acid, adjusting the pH to 4-6, removing impurity iron and aluminum, and conducting solid-liquid separation to obtain purified slag and purified liquid; and adjusting the pH of the purified liquid to 4-5, conducting manganese extraction with P204 as an extraction agent, conducting cobalt extraction with P507 asan extraction agent, and conducting nickel extraction with P507 as an extraction agent. Through the method provided by the invention, the lithium recovery rate is greatly increased; moreover, sodium hydroxide generated from precipitation of lithium can be returned and continuously used in the lime milk nickel-cobalt-manganese enrichment process; and meanwhile, the yield of nickel sulfate, cobalt sulfate and manganese carbonate is increased.

Disclosed is an electroplating diamond tool with high hardness and high wear resistance. The invention is formed by covering a coating of nano nickel-cobalt material on a green body of the diamond tool. The method of the tool comprises preparing electroplating liquid, preparing before electroplating of the green body of the diamond tool, and electroplating the green body of the diamond tool after the preparation. When electroplating the green body of the diamond tool after the preparation, the green body of the diamond tool is electroplated with the nano nickel-cobalt material by the utilization of the method of impulse electroplating. The electroplating liquid of the invention is formed by components of nickel sulfate, nickel chloride, cobalt sulfate, grain refiner, dodecyl sodium sulfate, boracic acid and the like. The tool has high hardness and high wear resistance, and thereby the service life is long. Further, the invention has the advantages of short manufacture period.

The invention discloses a method for preparing lithium carbonate and a ternary precursor by recycling a waste ternary lithium battery, and belongs to the field of solid waste recycling. Graphite and abinder carried in black powder obtained after pretreatment of a waste ternary battery are adopted as reducing agents, and the structure of the ternary material is destroyed through self-reduction phase inversion; lithium carbonate is converted into lithium bicarbonate which is easy to leach with water by adopting a carbonation water leaching method, so as to realize the preferential leaching of lithium; and sulfuric acid leaching is directly performed on the material subjected to lithium extraction without adding a reducing agent to obtain a nickel-cobalt-manganese solution. Copper, iron, calcium and other impurities in the solution are deeply removed through an impurity removal procedure, the content of aluminum and magnesium in the solution is controlled, then nickel, cobalt and manganese in the solution are extracted into an organic phase through synchronous extraction, a nickel sulfate solution, a cobalt sulfate solution and a manganese sulfate solution are obtained after reverseextraction is conducted through sulfuric acid, and a high-quality ternary positive electrode material precursor can be prepared after the metal proportion is adjusted. The method provided by the invention has the advantages of high recovery rate of valuable metals including lithium, nickel, cobalt and manganese, short flow, good product quality, economy and environment-friendliness.

The invention discloses bright tin plate non-chromium passivation solution, wherein, each liter of passivation solution contains 20g to 70g of trisodium phosphate, 0.1g to 5g of cobalt sulfate, 0.5g to 3g of sodium molybdate, 20g to 75g of phosphoric acid, the rest is water, and the ph value of the passivation solution is 3 to 5. The invention also discloses a tinplate passivation method; in the passivation with the non-chromium passivation solution of the invention, the working temperature of the passivation solution is 50 DEG C to 80 DEG C, the passivation time is 1s to 20s, and the passivation method is electro-chemical cathode passivation or chemical passivation. The tin plate non-chromium passivation solution of the invention does not contain hexavalent chrome, conducts chemical passivation or electro-chemical cathode passivation to the tinplate, and enables the tinplate to have the same high corrosion resistance and high oxidation resistance with a chromate passivation process. The welding performance, the adhesion performance to the coating and the like of the tinplate passivated through the non-chromium passivation process also meet the level of the tinplate passivated by chromate, which fundamentally solves the harm of the tinplate passivated by chromate with hexavalent chrome to the human body and the environment.