摘要:
A method for removing sodium sulfate from nickel and ammonia containing aqueous effluents. The effluents, typically from a nickel hydroxide production process, are cooled to or below 30° C. to crystallize and precipitate the sodium sulfate and dewater the effluent. The sodium sulfate is retrieved and the remaining solution is recycled back to the nickel hydroxide production process.
摘要:
A novel process for the production of nickel hydroxide wherein particulate nickel is reacted with oxygen in the presence of liquid water at a temperature of at least 180.degree. C. The invention also includes the nickel hydroxide product so produced.
摘要:
The invention provides a nickel foam and a method of forming a nickel foam for a nickel containing battery. An open-cell foam structure is placed in a nickel carbonyl gas containing structure. The foam structure is heated to a temperature at which nickel carbonyl decomposes. Nickel from the nickel carbonyl gas decomposes on the foam structure to form a nickel plated foam structure. The nickel plated foam structure is then sintered leaving an open-cell nickel network to form the nickel foam. The open-cells of the nickel foam comprise substantially hollow wires having a substantially uniform transverse cross-section. The nickel foam is further characterized by the conductivity through the nickel foam multiplied by a factor of 3.4 being equal to or greater than the theoretical conductivity of nickel.
摘要:
A multistage countercurrent solvent extraction process for removing cobalt from an aqueous sulfate solutions containing saturation amounts of calcium using an organic soluble phosphinic acid as the extractant preferably characterized by control of pH in various stages of the process to minimize scaling of gypsum in the extraction equipment.
摘要:
By contacting an aqueous cobaltous sulfate solution with an ion-exchange resin having bis--(2-picolyl)amine functional groups nickel is removed down to very low levels.
摘要:
A low temperature contaminant limiting process for lithiating hydroxides and forming lithiated metal oxides of suitable crystalinity in-situ. M(OH)2 is added to an aqueous solution of LiOH. An oxidant is introduced into the solution which is heated below about 150° C. and, if necessary, agitated. M may be selected from cobalt, nickel and manganese. The resultant LiMO2 becomes crystallized in-situ and is subsequently removed.
摘要翻译:用于锂化氢氧化物的低温污染物限制方法,并原位形成适当结晶度的锂化金属氧化物。 向LiOH的水溶液中加入M(OH)2 N。 将氧化剂引入溶液中,该溶液被加热至低于约150℃,如果需要,将其搅拌。 M可以选自钴,镍和锰。 所得LiMO 2 N 2原位结晶并随后除去。
摘要:
The invention provides a method of producing nickel hydroxide from elemental metal. Elemental nickel is first introduced into an aqueous ammonia or ammonia/ammonium salt solution capable of dissolving nickel. The potential, as measured by a standard calomel electrode, is allowed to reach a negative or reducing level. Oxygen is added to the aqueous solution at a rate that maintains the negative potential to facilitate the conversion of elemental nickel to nickel hydroxide. Nickel hydroxide may be readily precipitated from the aqueous solution.
摘要:
A process for producing nickel hydroxide from nickel powders, in which the feed nickel powder is directly converted in an aqueous solution containing nitrate and particulate nickel at least at room temperature and a pH in excess of about 6 into nickel hydroxide of a high density. Nickel powders of high surface area, e.g. 0.4 m.sup.2 /g or higher, typically produced by the thermal decomposition of nickel carbonyl, are particularly suitable as feed materials for this process.
摘要:
The invention provides an apparatus for metal plating a substrate. The apparatus includes a chamber adapted to receive metal carbonyl gas. The chamber includes an infrared transparent window. The infrared transparent window has a cooling passage filled with liquid coolant. The liquid coolant has a temperature below which decomposition of the metal carbonyl gas occurs. The liquid coolant prevents decomposition of the metal carbonyl gas on the infrared transparent window. The liquid coolant also is substantially infrared transparent for allowing infrared radiation through the infrared transparent window and cooling passage into the chamber. An infrared radiation source sends infrared radiation into the chamber through the infrared transparent window and cooling passage to heat the substrate to a temperature at which decomposition of the metal carbonyl gas occurs.
摘要:
Uranium is leached from water slurries of uranium ore by incorporating a mixture of sulfur dioxide and air therein to provide the oxidizing and acidifying requirements to accomplish leaching.