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

Active Publication Date: 2022-04-08
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(4) In the literature (CN110342565A) and (Chemical World, 2007:114,120,124.), the recovery rate of copper is not given; the treatment method of the filtrate and washing liquid after separation and washing, the amount of washing water required, etc.
(5) During the research process of this research group, it was found that when the acidic copper chloride etching waste liquid was used as raw material, the purity of the prepared copper hydroxide product could be greater than 96% without adding any additives, which met its standard Requirements; but the product is extremely difficult to wash and consumes a lot of washing water

Method used

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

Examples

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Effect test

Embodiment 1

[0023] Add a certain amount of additives and water to 100mL of acidic copper chloride etching waste liquid, mix evenly to obtain a mixed liquid; add the precipitant slowly and uniformly within 40 minutes, adjust the pH of the solution to 13.0, and stir the reaction at 30°C After aging for 90 minutes, filter, wash the filter cake with water until there is no chloride ion; dry the filter cake at 25°C to constant weight to obtain the product nano-copper hydroxide.

[0024] Among them, Cu in the mixture 2+ The concentration of hydrochloric acid is 50.0g / L, and the concentration of hydrochloric acid is 1.60mol / L; the auxiliary agent is a mixture of polyvinylpyrrolidone (K-15) and sodium tridecyl sulfate, and sodium tridecyl sulfate and polyvinyl pyrrolidone ( The mass ratio of K-15) is 0.20:1; the mass ratio of auxiliary agent to copper is 0.0008:1. Precipitating agent is sodium hydroxide, its concentration is 10mol / L.

Embodiment 2

[0026] Add a certain amount of additives and water to 100mL of acidic copper chloride etching waste solution, mix well to obtain a mixed solution; slowly and uniformly add a precipitant within 50 minutes, adjust the pH of the solution to 12.9, and stir the reaction at 20°C After aging for 70 minutes, filter for another 70 minutes, wash the filter cake with water until there is no chloride ion; dry the filter cake at 50°C to constant weight to obtain the product nano-copper hydroxide.

[0027] Among them, Cu in the mixture 2+ The concentration of hydrochloric acid is 70.0g / L, and the concentration of hydrochloric acid is 2.24mol / L; the auxiliary agent is a mixture of polyvinylpyrrolidone (K-25) and sodium undecyl sulfate, and sodium undecyl sulfate and polyvinylpyrrolidone ( The mass ratio of K-25) is 0.16:1; the mass ratio of auxiliary agent to copper is 0.001:1. Precipitating agent is potassium hydroxide, its concentration is 4mol / L.

Embodiment 3

[0029] Add a certain amount of additives and water to 100mL of acidic copper chloride etching waste solution, mix well to obtain a mixed solution; slowly and uniformly add a precipitant within 60 minutes, adjust the pH of the solution to 12.8, and stir the reaction at 10°C After aging for 100 minutes, filter for another 50 minutes, wash the filter cake with water until there is no chloride ion; dry the filter cake at 65°C to constant weight to obtain the product nano-copper hydroxide.

[0030] Among them, Cu in the mixture 2+ The concentration of hydrochloric acid is 100g / L, and the concentration of hydrochloric acid is 3.20mol / L; the additive is a mixture of polyvinylpyrrolidone (K-30) and sodium lauryl sulfate, and the mixture of sodium lauryl sulfate and polyvinylpyrrolidone (K-30 ) is 0.05:1 in mass ratio; the mass ratio of auxiliary agent to copper is 0.005:1. The precipitating agent is a mixture of sodium hydroxide and sodium carbonate, the molar ratio of sodium carbona...

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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%.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/02B82Y40/00C01D3/04
CPCC01G3/02B82Y40/00C01D3/04C01P2006/80C01P2004/10
Inventor 于少明徐金章汤政涛刘后传
Owner HEFEI UNIV OF TECH
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