159results about "Nickel carbonates" patented technology

Nickel compositions for use in manufacturing nickel metal compositions, and specifically to methods of making basic nickel carbonates used to produce nickel metal compositions are disclosed. By varying the molar ratios of carbonates and bicarbonates to nickel salts, the methods provide basic nickel carbonates that produce superior nickel-containing solids that react more effectively with phosphorous-containing ligands. The phosphorous containing ligands can be both monodentate and bidentate phosphorous-containing ligands.

The present disclosure provides a novel method to fabricate the basic nickel carbonate particulates. The nickel content in the basic nickel carbonate particulates fabricated by this invention (51-53 mass %) is higher than the present commercialized products (44-46 mass %). Basic nickel carbonate is an important intermediate to prepare NiO and pure Ni particles, and NiO and pure Ni particles are important materials in electronic industrial. Therefore, basic nickel carbonate has its potential market.

The invention discloses a method for continuously compounding high-purity alkali nickel carbonate. The method comprises the steps as follows: a nickeliferous stock solution, ammonium salt and a precipitant Na2CO3 are continuously conveyed to a multifunctional reactor for carrying out continuous compounding reaction, and resultant slurry is continuously discharged from a material outlet; during the continuous compounding reaction, the reaction temperature is controlled within 50-80 DEG C with a real-time monitoring system, the reaction pH value is controlled within 7.5-8.5, and the average residence time of a reaction system in the multifunctional reactor is controlled within 20 h-30 h; and a reaction discharging is filtered, filter residue is aged, and then the reaction discharging enters into a multi-level washing tower to be washed, when the flow conductance value of the multi-level washing tower bottom is less than 600 ms / cm, a washed product is filtered and dried to obtain the high-purity alkali nickelous carbonate. The invention has the advantages of simple process, low equipment investment, environment protection, complete product structure, good quality and the like.

The invention discloses a preparation method of microporous ultrafine high activity nickel carbonate, comprising the following steps of adopting mixed acid solution prepared from nitric acid, sulfuric acid and hydrochloride to dissolve metal nickel to prepare composite nickel salts used as raw materials; carrying out precipitation reaction with the composite nickel salts by using mixed percipitant of sodium carbonate, ammonium carbonate or ammonium bicarbonate and sodium hydroxide in a sealed drum type reaction pot under the action of high pressure CO2; and preparing the nickel carbonate by crushing and drying precipitates by adopting an integrative machine of crushing and drying after washing the precipitates. Shown through a particle image analyzer, a full-automatic specific surface area voidage analyzer and an SEM (Scanning Electron Microscope) photograph result, the nickel carbonate has fine size, the particle size of D50 can achieve 1-5 microns, the particle size specific surface area can achieve more than 300m2 / g, the content of carbon dioxide is larger than 20 percent, the nickel carbonate has multiple and small micropores, the powder nickel carbonate with the nickel content of 49-51 percent has narrow and uniform particle size distribution, wherein the particle size of D10 is 0.93 microns, the particle size of D50 is 1.81 microns and the particle size of D90 is 2.82 microns, and the dispersion of the powder nickel carbonate is favorable.

The invention discloses a chemical nickel plating waste water circulating reclamation and nickel resource circulating reutilization method which comprises the following steps: (1) sending the chemical nickel plating waste water into a strongly-alkaline anion exchange resin to carry out complex adsorption and decomplexation treatment, thereby destabilizing nickel complexation; (2) adsorbing nickel ions contained in the nickel plating waste water treated by the step (1) with a strongly-acidic cation exchange resin; (3) adsorbing residual anions in the waste water treated by the step (2) with a strongly-alkaline anion exchange resin to lower the electrical conductivity; (4) filtering to remove suspended particles, colloidal matters or organic matters in the waste water obtained in the step (3); and (5) treating the waste water treated by the step (4) with a reverse osmosis apparatus, wherein the produced water can be recycled, and thick water generated by the reverse osmosis apparatus can be circulated back to the step (1). Since zero water is discharged in water circulating reclamation, the problem of overproof discharge water does not exist, and the nickel in the raw waste water is prepared into basic nickel carbonate as a recycled resource.

Disclosed is a positive electrode active material for a lithium ion secondary battery, including lithium-transition metal composite oxide of a layer crystal structure, in which the lithium-transition metal composite oxide contains an element that improves conductivity of electrons in the lithium-transition metal composite oxide. Use of this positive electrode active material can improve cycle characteristics, high rate characteristics and thermal stability of lithium ion secondary batteries. Furthermore, by use of this positive electrode active material, gas generation in batteries can be decreased.

The invention relates to a recovery system and a method of single nickel salt coloring and moderate temperature hole sealing agents in aluminum processing. The system comprises a nickeliferous wastewater entrapment unit, a nickeliferous wastewater collection unit and a basic nickel carbonate recovery unit, wherein a running water wash trough 18# in the nickeliferous wastewater entrapment unit is externally connected with tap water; running water wash troughs 14#, 15#, 17# and 18# are in series-opposing connection; a single nickel salt coloring trough 13# is compatible with a moderate temperature hole sealing trough 16#; the nickeliferous wastewater collection unit comprises a nickeliferous wastewater collection pool A and a nickeliferous wastewater collection pool B; a pipeline connected with the nickeliferous wastewater collection pool A and the nickeliferous wastewater collection pool B is arranged at a water outlet of the running water wash trough 14#; and the basic nickel carbonaterecovery unit comprises a pump 1#, a recovery tank, a centrifuge, a secondary crystallization tank and a pump 2#. According to the system and the method, nickeliferous wastewater can be separately collected on line; a nickeliferous product, namely basic nickel carbonate, is recovered and converted into a moderate temperature hole sealing agent on a basis of agent compatibility; and reclamation and recycling of toxic waste are achieved.

The present invention provides a nickel atom-, manganese atom- and cobalt atom-containing composite carbonate that is high in specific surface area and large in tap density, and useful as a raw material for producing a lithium nickel manganese cobalt composite oxide to be used in a positive electrode active material for use in a lithium secondary battery, and provides a method for industrially advantageously producing the composite carbonate. The composite carbonate includes nickel atoms, manganese atoms and cobalt atoms, and has an average particle size of 5 μm or more and less than 20 μm, a BET specific surface area of 40 to 80 m2 / g and a tap density of 1.7 g / ml or more.