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Method of producing copper oxychloride using circuitboard etching waste liquid

A technology for etching waste liquid and copper oxychloride, which is applied in the direction of copper oxychloride, chemical instruments and methods, copper halide, etc., can solve the problems of waste of iron resources, high processing cost, and large water consumption, and achieve recycling, The process is simple and stable, and the effect of reducing harm

Active Publication Date: 2008-06-18
阮玉根
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Among the above-mentioned six methods, the first method is the simplest and most direct, but copper hydroxide sludge is a basic raw material of copper compounds, and its economic value is low, and in the mother liquor produced during the neutralization reaction, it contains ammonium chloride and chlorine Sodium chloride, recycling or waste to produce secondary pollution
The second, third, fifth, and sixth types only deal with the acidic or alkaline solution in the circuit board etching waste liquid, and do not fully achieve the purpose of disposal
The preparation of cuprous chloride described in the fourth type requires a large amount of water and the iron-containing wastewater produced is a secondary pollutant, and the treatment cost is high and iron resources are wasted.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Sodium sulfite was added to acidic and alkaline two kinds of circuit board etching waste liquids to form insoluble substances, and they were stirred and mixed respectively; The concentration of ions is 250g / L, and the insoluble substances are removed to obtain two kinds of clear solutions, acidic and basic. These two kinds of acidic and basic clear solutions are respectively added to the reactor at the same time with a flow controller for neutralization reaction. And the flow rate of the acidic solution is 200L / h, and the flow rate of the alkaline solution is 400L / h, so as to ensure that the pH value of the reaction solution is stable between 4.5 and 5.5 during injection, react at a constant temperature of 80°C, and stir the reaction solution until the copper oxychloride Until the crystals are completely precipitated from the reaction solution; filter to obtain copper oxychloride crystals and filtrate, rinse the copper oxychloride crystals with pure water, and dry at a t...

Embodiment 2

[0036] Add sodium sulfite to the acidic and alkaline circuit board etching waste liquids to form insoluble substances, and stir and mix them separately; measure the concentration of chloride ions in the acidic circuit board etching waste liquid to be 100g / L, and the alkaline circuit board etching waste liquid ammonia The concentration of ions is 250g / L, and the insoluble substances are removed to obtain two kinds of clear solutions, acidic and basic. These two kinds of acidic and basic clear solutions are respectively added to the reactor at the same time with a flow controller for neutralization reaction. And the flow rate of the acidic solution is 150L / h, and the flow rate of the alkaline solution is 400L / h, so as to ensure that the pH value of the reaction solution is stable between 4.5 and 5.5 during injection, react at a constant temperature of 80°C, and stir the reaction solution until the copper oxychloride Until the crystals are completely precipitated from the reaction...

Embodiment 3

[0038] Sodium sulfite was added to the acidic and alkaline circuit board etching waste liquids to form insoluble substances, and they were stirred and mixed separately; The concentration of ions is 250g / L, and the insoluble substances are removed to obtain two kinds of clear solutions, acidic and basic. These two kinds of acidic and basic clear solutions are respectively added to the reactor at the same time with a flow controller for neutralization reaction. And the flow rate of the acidic solution is 300L / h, and the flow rate of the alkaline solution is 400L / h, so as to ensure that the pH value of the reaction solution is stable between 4.5 and 5.5 during injection, react at a constant temperature of 80°C, and stir the reaction solution until the copper oxychloride Until the crystals are completely precipitated from the reaction solution; filter to obtain copper oxychloride crystals and filtrate, rinse the copper oxychloride crystals with pure water, and dry at a temperature ...

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Abstract

The present invention relates to a method for producing copper oxychloride by using waste liquor produced by etching circuit board. Said method includes the following steps: respectively adding condensation reducting agent into acid and alkaline two waste liquor, respectively stirring them, the described acid waste liquor is the waste liquor containing copper ion and hydrochloric acid, and the described alkaline waste liquor is the waste liquor containing copper ion and ammonia water, respectively filtering said two waste liquors, removing unsoluble substances, respectively obtaining two clear solutions, adding said two clear solutions into reactor to make neutralization reaction, controlling pH value of reaction solution and making it be 4.5-5.5, finally obtaining copper oxychloride crystal.

Description

technical field [0001] The present invention actually relates to a treatment method for circuit board etching waste liquid, in particular to a method for producing copper oxychloride with circuit board etching waste liquid. Background technique [0002] There are usually 6 treatment methods for the existing circuit board etching waste liquid: [0003] The first is to mix the acid and alkali solutions of the circuit board etching waste liquid together, and adjust the pH value to 5.5 with liquid alkali to neutralize the reaction to generate copper hydroxide mud. [0004] The second is to use a kind of acidic circuit board etching waste liquid in the circuit board etching waste liquid to generate copper chloride dihydrate through heating, concentrating, cooling and crystallization. [0005] The third is to add copper oxide to the acidic circuit board etching waste liquid in the circuit board etching waste liquid to prepare cuprous chloride. [0006] The fourth is to use the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/06C02F1/52C02F1/70C02F1/58C01C1/16
Inventor 阮玉根
Owner 阮玉根
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