100results about "Nickel halides" patented technology

A process for preparing a hydrocyanation catalyst comprising contacting a bidentate phosphorous-containing ligand with a molar excess of nickel chloride in the presence of a nitrile solvent and a reducing metal which is more electropositive than nickel. Preferably, the nickel chloride is dried before use.

The invention relates to a method for treating ferric trichloride etching waste liquor, in particular to a method for treating the ferric trichloride etching waste liquor containing nickel, which mainly adopts a two-stage extraction method to remove iron so as to achieve the complete separation of the nickel and the iron, wherein a first stage extraction organic phase combination comprises 15 to 40 percent of extractant, 10 to 20 percent of synergist and 40 to 75 percent of diluent agent according to the volume ratio; a second stage extraction organic phase combination comprises 20 to 50 percent of extractant, 5 to 10 percent of synergist and 40 to 75 percent of diluent agent according to the volume ratio; the extractants and the synergists used in the two stages have various selections; and under the condition that the technological parameters are controlled strictly, with the two stages of extractions, the iron contained in the etching waste liquor is regenerated into a liquid state ferric trichloride product, and the nickel is regenerated into a nickel chloride product. The method overcomes various defects of the prior art, has good iron and nickel separation effect, high efficiency and low cost, achieves the resource recycling of valuable metals to the utmost extent while achieving the decontamination of the ferric trichloride etching waste liquor, and has board technique application prospect.

The invention relates to a method for forming a telescoped multiwall nanotube. Such a telescoped multiwall nanotube may find use as a linear or rotational bearing in microelectromechanical systems or may find use as a constant force nanospring. In the method of the invention, a multiwall nanotube is affixed to a solid, conducting substrate at one end. The tip of the free end of the multiwall nanotube is then removed, revealing the intact end of the inner wall. A nanomanipulator is then attached to the intact end, and the intact, core segments of the multiwall nanotube are partially extracted, thereby telescoping out a segment of nanotube.

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.

Described herein are nanoreactors having various shapes that can be produced by a simple chemical process. The nanoreactors described herein may have a shell as thin as 0.5 nm and outside diameters that can be controlled by the process of making and have a nanoparticle enclosed therein. The nanoreactors have catalytic activity and may be used to catalyze a variety of chemical reactions.

The invention discloses a method for preparing nickel sulfate or nickel chloride through normal-pressure leaching of a nickel oxide. The method comprises the following steps: mixing a dilute sulfuricacid solution with a nickel oxide, and carrying out a stirring reaction at 50 to 100 DEG C for 1 to 5 h so as to gradually produce a yellow-green solid; carrying out solid-liquid separation, washing the yellow-green solid with distilled water until the solid is weakly acid and then dissolving the solid with distilled water or with an aqueous hydrogen peroxide solution with a concentration of 1 to5% so as to produce a corresponding nickel sulfate solution; and mixing a hydrochloric acid solution with the nickel oxide and carrying out a stirring reaction at 50 to 100 DEG C for 1 to 3 h so as togradually produce a green nickel chloride solution. A nickel salt solution prepared by using the method has nickel content of 110 g/L or above. According to the method, direct leaching reaction at normal pressure is carried out so as to obtain nickel sulfate and nickel chloride, so production flow of nickel sulfate and nickel chloride is effectively simplified, and cost is lowered; and impurity introduction is reduced from the source, so the quality of nickel sulfate is effectively improved.

The invention provides a method for preparing nickel chloride through sulfuric acid leaching of crude nickel hydroxide, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: carrying out concentrated sulfuric acid leaching on the crude nickel hydroxide to obtain a nickel sulfate solution, removing silicon and iron from the nickel sulfate solution, and allowing the obtained solution to enter an extraction system; carrying out extraction to remove Mn, Zn, Ca, Mg and other impurities from the nickel sulfate solution and recover Co, wherein the content of Mn, Zn, Ca and Co is reduced to 0.001 g/L or below, and the content of Mg is reduced to 0.05 g/L or below; carrying out extraction to convert the nickel sulfate solution into a nickel chloride solution; and carrying out evaporation, crystallization and centrifuge packaging to obtain the nickel chloride product. The method has the advantages of simplicity, effective control of the content of the impurities in the nickel chloride, obtaining of the high-quality nickel chloride product, and wide application.

The invention relates to a dissolution method for treating nickel oxide waste catalyst, which is characterized in that the dissolution treatment process comprises the steps: the nickel oxide waste catalyst which is screened blocky material such as scree and slag is put into the hydrochloric acid solution with a concentration above 5N/L; under a temperature ranging from 85 DEG C to 100 DEG C and under a stirring condition, the oxidant sodium chlorate is added or the chorine is implanted and the oxidation potential is controlled to be 0.5-1.0V; the dissolution reaction is carried out for 1-5 hours to obtain green nickel chloride solution. The method of the invention has high leaching rate and dissolution ratio; high temperature treatment and pressure treatment are not required, which reduces cost and solves the difficult problem of production technology. Combined with prior process of nickel electrolysis, the nickel in the waste catalyst can be effectively recycled.

The invention belongs to the technical field of inorganic fine chemical products and discloses a method for preparing refined nickel salt from reduced nickel powder as a raw material and the nickel salt prepared with the method. The method comprises following steps: (1), the reduced nickel powder is leached by acid liquor, and a nickel salt solution is obtained; (2), hydrogen peroxide is added tothe nickel salt solution, and pH is regulated to 4.0-5.5; (3), solid-liquid separation is performed, a liquid is subjected to evaporative crystallization, and the refined nickel salt is obtained. Theinvention further provides the refined nickel salt prepared with the method. The preparation method adopts simple technological steps, the production process is easy to control, an obtained product ishigh in purity, impurities such as calcium, magnesium, iron, copper, zinc and cadmium in the nickel salt product are smaller than 10 ppm, and the product can be used for preparing binary precursors (nickel-cobalt hydroxide and nickel-manganese hydroxide) and a ternary precursor (nickel-cobalt-manganese hydroxide) of a lithium ion battery. According to the method for preparing the refined nickel salt from the reduced nickel powder as the raw material, a new way is provided for preparation of the refined nickel salt.

The invention discloses a preparing method of nickel salt (NiSO4 or NiCl2) through waste liquid with compound nickel acid, which comprises the following steps: removing impurity ion such as Cu2+, Co2+, Fe2+, Ca2+ and Mg2+ in the waste liquid; extracting through P2O4; adding metal nickel in the organic phase; draining the extracting phase; adopting acid to proceed back extraction for organic phase; transmitting nickel into clear nickel salt; evaporating; crystallizing to produce metal nickel salt.

The invention discloses a processing method for chemical nickel plating waste liquid containing nitric acids, and particularly relates to an environmentally-friendly processing method. Considerable integrated environment and economic benefits are generated. The method comprises the following steps: (1) the waste liquid containing nickel is filtered to remove mechanical impurities; (2) the nitric acids are separated from the waste liquid containing the nickel through a diffusion dialysis membrane; (3) the pH of the waste liquid containing the nickel passing through the membrane is adjusted, the pH is adjusted to 3.5-4.0, and then the waste liquid containing the nickel, of which the pH is adjusted, is filtered; (4) the waste liquid containing the nickel passes through chelate resin, so that the nickel is recovered, and then the nickel adsorbed on the resin is eluted by hydrochloric acids to obtain nickel chloride; (5) oxidizers are added to the waste liquid passing through the resin, high-temperature oxidation and dephosphorization are performed, then filtration is performed, precipitates formed by calcium and phosphate are filtered, and calcium phosphate is recovered; (6) heavy metal ion trapping agents are added to filtrate, and a reaction is performed for 30-40 minutes; (7) flocculants PAC and PAM are added to the filtrate for flocculation and sedimentation, and then supernatant which reaches a set standard is discharged.

The invention provides a method for producing a nickel chloride solution through leaching nickel hydroxide cobalt with hydrochloric acid. The method comprises the following steps: step one, carrying out two-stage leaching, namely, firstly adding a nickel chloride solution into a reaction kettle, then adding hydrochloric acid and one-stage leaching residue for leaching, always controlling the concentration of [H<+>] of the solution in the reaction kettle to 0.1-0.8mol/L, then filtering the solution by a filter press so as to produce a second-stage leaching liquid and second-stage leaching residue; and step two, carrying out one-stage leaching, namely, adding the second-stage leaching liquid into a one-stage leaching kettle, adding nickel hydroxide cobalt into the one-stage leaching kettle for adjusting the pH value of the solution, after the pH value reaches 3.5-4.0, carrying out filter pressing, so as to produce one-stage leaching liquid and one-stage leaching residue, and eliminating impurities of the one-stage leaching liquid so as to obtain the product nickel chloride solution. The method can effectively prevent generation and overflowing of chlorine in leaching; furthermore, the second-stage leaching residue formed in the leaching process contains little nickel, so that the method can effectively improve the leaching rate of the nickel.

The invention discloses a method for treating lithium nickel manganese cobalt oxide ternary waste. The method is as below: dissolving ternary waste with alkali, dissolving amphoteric aluminum in the solution to separate the aluminum from other components, and then reducing the solid after aluminum separation in a reduction furnace; then adding reduced materials to pure water for washing; dissolving lithium oxide in hot pure water to obtain lithium hydroxide, thereby realizing separation of lithium from nickel-cobalt-manganese; controlling addition amount of sulfuric acid and pH value at a final process and an end point to separate highly active metal manganese from nickel and cobalt; pulpifying slag after separation of manganese, conducting electromagnetic separation to obtain electromagnetic separation materials, and then dissolving the electromagnetic separation materials in hydrochloric acid; and introducing chlorine gas into the obtained nickel-cobalt solution at a certain temperature and pressure to oxidize and hydrolyze cobalt ions into trivalent cobalt precipitates, thereby achieving the separation of nickel and cobalt. The method has the advantages of a short process, a small amount of waste water generation and high material recovery rate; and the obtained products are all battery grade, and have high added value.

The invention relates to a method used for producing nickel chloride products taking waste printing nickel screens as raw materials, and belongs to the field of hydrometallurgy. According to the method, cyclic utilization of waste printing nickel screens is realized, and the waste printing nickel screens are taken as the raw materials to produce the nickel chloride products. The mehod comprises following steps: the waste printing nickel screens are processed with a release agent so as to remove photoresist on the surfaces of the waste printing nickel screens, and then are subjected to leaching treatment with industrial hydrochloric acid; an obtained leached solution is subjected to extraction with P507 extraction agent so as to remove impurities until the content of impurities in an obtained extraction raffinate is capable of satisfying requirements on the content in nickel chloride product production; and the extraction raffinate is subjected to evaporation, crystallization, centrifugalization, and drying so as to obtain the qualified nickel chloride products. The method is capable of realizing cyclic utilization of the waste printing nickel screens, and broadening the sources of raw materials used for producing the nickel chloride products.

The invention relates to a method for adsorbing and removing silicon from a nickel solution. According to the method, a prefabricated colloidal nickel hydroxide precipitate is used as an adsorbent, and adsorbs a silica gel in a nickel solution under a certain condition, and solid-liquid separation is performed to achieve the purpose of deep silicon removal, wherein the silicon content in the nickel solution can be reduced to less than 0.005 g/L from about 1 g/L, and the yield of the valuable metal nickel is more than 99%. According to the invention, the method for deep purification and siliconremoval is simple and easy to implement, other impurities cannot be introduced, the direct recovery rate of the valuable metal is high, the next procedure is facilitated, and the industrial continuous production can be achieved.

The invention belongs to the technical field of nano-materials, and particularly relates to a bifunctional water decomposition nano material based on metal oxide and a preparation method thereof. A commercial current collector is selected as a substrate, a chemical coprecipitation method is used for preparing a nano material precursor containing two or more metal ions, and then the corresponding metal oxide nano material is obtained through a thermal conversion method according to different thermal decomposition properties of different metal precursors. According to the prepared material, themetal oxide with high H * adsorption capacity can be integrated into a material system with excellent electrocatalytic oxygen production property so that the material finally has the capacity of catalytically decomposing water for hydrogen evolution and producing oxygen at the same time, and thus the purpose of completely decomposing water in an alkaline environment is achieved. The material prepared in the invention has the advantages of strong binding force with a current collector, regular and ordered structure, excellent conductivity and good mechanical and chemical stability, and the method has the advantages of simple process, low energy consumption, safety, reliability, convenience in large-scale preparation, and facilitation of popularization and application.

The invention relates to a treatment method of fluorine-containing nickel slag generated in a nitrogen trifluoride preparation process, and belongs to the technical field of harmless treatment of nickel-containing hazardous wastes. The method comprises the following steps: (1) crushing the fluorine-containing nickel slag into solid powder; (2) dissolving the fluorine-containing nickel slag solid powder by using a hydrofluoric acid solution, performing stirring at 30-60 DEG C, and adding an oxidizing substance in the stirring dissolution process until the fluorine-containing nickel slag is completely dissolved to obtain a mixed solution a; (3) adjusting the pH value of the mixed solution a to 3.5-4.5 by using ammonia water, and performing filtering to obtain ferric hydroxide precipitate and a mixed solution b; and (4) continuing to adjust the pH value of the mixed solution b to 6.5-7.5 with the ammonia water, performing filtering to obtain nickel fluoride and a mixed solution c, heating and concentrating the mixed solution c, and performing cooling crystallizing to obtain ammonium fluoride and a mixed solution d. The method realizes recovery and cyclic utilization of nickel metal resources and ammonium fluoride, and can significantly reduce the production cost of nitrogen trifluoride.

The invention discloses a lead removing method in the nickel chloride solution through resin, which makes nickel chloride solution and D318 resin exchange ion to remove lead.