A kind of method that prepares nano copper hydroxide by acid copper chloride etching waste liquid

A technology for etching waste liquid and copper hydroxide, applied in the direction of copper oxide/copper hydroxide, nanotechnology, alkali metal chloride, etc., can solve the problem of unspecified filtrate and lotion treatment method washing water consumption, unspecified copper recovery efficiency, product washing difficulties, etc., to achieve the effect of reducing raw material consumption, high recovery rate, and easy washing
CN111333099BActive Publication Date: 2022-04-08HEFEI UNIV OF TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HEFEI UNIV OF TECH
Publication Date
2022-04-08

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Abstract

The invention discloses a method for preparing nano-copper hydroxide from acidic copper chloride etching waste liquid. Adding auxiliary agent and water to an appropriate amount of acidic copper chloride etching waste liquid, mixing evenly and adding a precipitant to adjust the pH value of the solution Then stir and react and age, filter and wash the filter cake with water until there is no chloride ion, dry the filter cake to constant weight to obtain the product nano-copper hydroxide; adjust the pH of the filtrate to neutral with concentrated hydrochloric acid, evaporate, crystallize, and dry To constant weight to obtain by-product sodium chloride or potassium chloride. The invention uses acidic copper chloride etching waste liquid as raw material and adopts a simple process to obtain the product with a purity greater than 99.0%, a chloride content (Cl)≤400ppm, a fibrous appearance and an average diameter of 40-100nm in one step. , Nano-copper hydroxide products with an average length between 1 and 2.5 μm. The recovery rate of copper in the method of the invention can reach more than 99.9%.
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Description

technical field

[0001] The invention relates to a method for preparing nano-copper hydroxide, in particular to a method for preparing nano-copper hydroxide from acid copper chloride etching waste liquid, which belongs to the field of material manufacturing and industrial waste liquid recovery, treatment and utilization. Background technique

[0002] Copper hydroxide is a blue or light blue solid powder with a layered structure and is easily decomposed by heat; it can be used in medicine, pesticides, pigments, feed additives, catalysts, mordants and analytical reagents.

[0003] Studies in recent years have found that the properties and functions of nano-scale copper hydroxide are better than those of ordinary copper hydroxide, and are more widely used. For example: (1) When the particle size of nano-copper hydroxide is small to a certain extent, its magnetic properties are very sensitive to the intercalation of molecular ions, which makes it have potential applications in se...

Claims

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