Method for recovering nickel resource from waste liquid of chemical nickel plating

Abstract

The invention provides a method for recovering a nickel resource from waste liquid of chemical nickel plating. The method comprises the following steps of: A, adding nickel phosphorus particles or nickel phosphorus particle-containing liquid serving as an inducer into the waste liquid of chemical nickel plating so as to initiate that the nickel phosphorus particles are chemically reduced and separated out from the waste liquid of chemical nickel plating; and B, preparing nickel salts, nickel hydroxide or metal nickel from the separated nickel phosphorus particles serving as raw materials. The obtained nickel phosphorus particles are washed completely with deionized water, react with nitric acid, sulfuric acid and hydrochloric acid, are filtered, and are subjected to recrystallization or ion exchange to obtain various nickel salts and nickel hydroxide, or are electrolyzed to obtain the simple substance nickel. By the method, the process is simple; equipment investment is small; the using amount of a reagent is small; the purity of the product is high; the heavy metal pollution risk of the waste liquid of chemical nickel plating is avoided; and the economic benefit of treating the waste liquid of chemical nickel plating is increased.

Description

technical field [0001] The invention belongs to the technical field of recycling industrial waste, in particular to a method for recovering nickel resources from electroless nickel plating waste liquid. Background technique [0002] Electroless nickel plating is a kind of electroless nickel plating, directly under the action of strong reducing agent hypophosphite (sometimes also hydrazine and its derivatives, sodium borohydride, etc.) 2 + A surface treatment technology that forms a Ni-P alloy coating on the surface of a catalytically active coating (Fundo AM, Abrantes LM. The electrocatalytic behavior of electroless Ni-P alloys. Journal Of Electroanalytical Chemistry, 2007, 600, 63-79). Because of its simple process, strong practicability, uniform coating, and the advantages of wear resistance, corrosion resistance, and no size and shape restrictions on plated parts, it has been widely used in the fields of electronics, petrochemicals, machinery manufacturing, and aerospace...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the processing capacity is small, the selection of ion exchange resin is difficult, and the process operation is complicated; the solvent extraction method needs more extraction stages to treat the electroless nickel plating waste liquid, and the organic solvent consumption in the extraction and regeneration process is large, and the treatment cost High; the adsorption materials used in the adsorption method include activated carbon, humic acid, sepiolite, adsorption resin, etc., which are often used to treat low-concentration Ni2+ wastewater. The saturated adsorption capacity is small, which is easy to cause secondary pollution and requires a large investment in equipment; membrane separation technology Including reverse osmosis, membrane extraction, electrodialysis, etc. At present, this kind of technology has problems such as large equipment investment and high cost, and is not economically feasible and difficult to promote and use.