摘要:
A method for the recovery of metals, generally heavy metals or chelatable metals such as zinc or copper from chloride solutions such as acid chloride etching solutions comprises extracting the metal with a mixed extracting agent of anion exchange/chelating, solvating/cation exchange or anion exchange/cation exchange character, separating the organic phase washing it with water, aqueous ammonia or aqueous ammoniacal ammonium sulphate, stripping the metal from the organic phase thereby obtained by contacting it with sulphuric acid and returning the organic phase to the extraction stage for reuse after regenerating it.
摘要:
Prior to evaporative crystallization of ammonium tungstate solutions to give ammonium paratungstate (APT), an aluminum compound, e.g. aluminum sulfate solution, is added to precipitate silicon and phosphorus impurities. The yield of crystallized ammonium paratungstate is thereby increased.
摘要:
1. A process for the recovery of a metallic nickel product in a solvent extraction process including the steps of:(a) forming a nickel ammine complex by stripping nickel from a nickel loaded organic phase with a high strength ammonia solution; and(b) reducing the nickel ammine complex with hydrogen from the high strength ammonia solution to produce a metallic nickel product.
摘要:
An improved extraction system employing a quaternary amine to extract anions from an aqueous solution, particularly precious metals such as gold or silver from an aqueous alkaline solution. The improvement comprises the use of a weak organic acid (a compound providing an acidic proton) along with the quaternary amine. The improvement is useful in both liquid-liquid and liquid-solid extraction systems.
摘要:
A method for the recovery of metals, generally heavy metals or chelatable metals such as zinc or copper from chloride solutions such as acid chloride etching solutions comprises extracting the metal with a mixed extracting agent of anion exchange/chelating, solvating/cation exchange or anion exchange/cation exchange character, separating the organic phase washing it with water, aqueous ammonia or aqueous ammoniacal ammonium sulphate, stripping the metal from the organic phase thereby obtained by contacting it with sulphuric acid and returning the organic phase to the extraction stage for reuse after regenerating it.
摘要:
Provided is a system for efficiently recovering trace metal from a large amount of a raw material, such as when trace metal is recovered from nickel oxide ore. This ion exchange resin has, on a carrier, an amide derivative represented by the following general formula. In the formula, R1 and R2 represent the same or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R4 represents a hydrogen atom or an arbitrary group, other than an amino group, bonded to ± carbon as an amino acid. The amide derivative is preferably a glycineamide derivative. The carrier preferably includes a primary amine and/or a secondary amine.
摘要:
Provided is a system for efficiently recovering trace metal from a large amount of a raw material, such as when trace metal is recovered from nickel oxide ore. This ion exchange resin has, on a carrier, an amide derivative represented by the following general formula. In the formula, R1 and R2 represent the same or different alkyl groups, R3 represents a hydrogen atom or an alkyl group, and R4 represents a hydrogen atom or an arbitrary group, other than an amino group, bonded to α carbon as an amino acid. The amide derivative is preferably a glycineamide derivative. The carrier preferably includes a primary amine and/or a secondary amine.
摘要:
Provided is a method for selectively extracting and inexpensively recovering scandium from an acidic solution containing calcium, magnesium, and scandium. The scandium extraction method according to the present invention involves subjecting an acidic solution containing calcium, magnesium, and scandium to solvent extraction using an extraction agent consisting of an amide derivative represented by the general formula below. In the formula, R 1 and R 2 represent the same or different alkyl groups, and R 3 is a hydrogen atom or alkyl group. The amide derivative preferably consisting of one or more derivatives selected from glycine amide derivatives, histidine amide derivatives, lysine amide derivatives, and aspartic acid amide derivatives. The pH of the acidic solution is preferably pre-adjusted to between 1 and 4.