Production method for basic copper chloride

A production method and technology of cupric chloride, applied in the direction of cupric chloride, cupric halide, etc., can solve the problems of unstable particle size and color of basic cupric chloride, and unsteady control of product quality.

Active Publication Date: 2018-08-21
东莞市恒建环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size and color of basic copper chloride produced in industry are often unstable, resulting in unstable control of product quality.

Method used

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  • Production method for basic copper chloride
  • Production method for basic copper chloride
  • Production method for basic copper chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1. Removal of impurities in acidic etching waste liquid:

[0055] Start the acid etching waste liquid lifting pump, start the press filtration, the filtrate produced overflows to the acid etching waste hydraulic pressure filter tank, and lifts the filtrate to the acid etching waste liquid purification tank through the filter pressure tank lifting pump for purification treatment.

[0056] Turn on the mixer, add sodium chlorate solution to the acid etching waste liquid purification tank to remove the Cu in the acid etching waste liquid + , Fe 2+ Oxidized to Cu 2+ , Fe 3+ , according to the color of the acidic etching waste liquid to judge the oxidation end point, when the acidic etching waste liquid is green and transparent, it is the oxidation end point, and there is no need to continue to add sodium chlorate solution; otherwise, continue to add sodium chlorate solution until it is green and transparent. Add ammonia water to the purification tank until the pH value of...

Embodiment 2

[0067] 1. Seed crystal preparation

[0068] Add tap water to the crystallization tank until the specified position, that is, just soaked through the steam pipe in the crystallization tank. Start the crystallization tank agitator in the process of pumping tap water into the crystallization tank, the stirring speed is 65r / min, and open the self-circulation of the crystallization tank.

[0069] Open the steam heating valve, raise the temperature of the material in the crystallization tank to 70±2°C, and close the steam heating valve after the temperature reaches.

[0070] Add 70Kg basic copper chloride seed crystals in the crystallization tank.

[0071] 2. Raw material preheating

[0072] Referring to the method of Example 1, the waste acidic etching liquid and the waste alkaline etching liquid were respectively subjected to impurity removal treatment.

[0073] Detect the Baume degree and pH of acidic etching waste liquid and alkaline etching waste liquid. The Baume degree of...

Embodiment 3

[0102] Embodiment 3 is basically the same as Embodiment 2, the difference lies in the following aspects:

[0103] 1), seed crystal preparation steps

[0104] Embodiment 3 replaces the tap water among the embodiment 2 with basic cupric chloride mother liquor; The addition amount of kind is 85Kg.

[0105] 2), raw material preheating step

[0106] The Baume degree and pH value of raw material are different, specifically: the Baume degree of the acidic etching waste liquid of embodiment 3 is 26Be °, and the pH value is 1.5, and the Baume degree of alkaline etching waste liquid is 15Be °, and the pH value is 9.0 .

[0107] The preheating temperature is different, specifically: the preheating temperature of Example 2 is 43°C, and the preheating temperature of Example 3 is 48°C.

[0108] 3), production start-up steps

[0109] The stirring speeds during the crystallization reaction of the alkaline etching waste liquid and the acidic etching waste liquid are different, specificall...

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Abstract

The invention discloses a production method for basic copper chloride. The production method comprises the following steps: respectively preheating an acid etching waste liquid and a basic etching waste liquid to 43-55 DEG C, further mixing the waste liquids in the presence of a basic copper chloride crystal seed, enabling the mixture to react under conditions that the temperature is 68-72 DEG C and the rotation speed is 65-85 r/minute, so as to obtain a mixed liquid with basic copper chloride, and filtering the mixed liquid, thereby obtaining basic copper chloride, wherein the addition amountof the basic copper chloride crystal seed is 70-100 Kg/15m<3>. A basic copper chloride product produced by using the method is dark green and uniform in granule, and in addition, the content of copper in the basic copper chloride product is greater than or equal to 58.5 w/%, and the basic copper chloride product is applicable to industrial production.

Description

technical field [0001] The invention relates to a production method of basic copper chloride. Background technique [0002] With the development of the electronics industry, the extensive use of printed circuit boards (PCBs) has led to the generation of a large amount of copper-containing etching waste (spent copper etchant), mainly including two types of acidic etching waste and alkaline etching waste. Acidic etching waste liquid is the etching waste liquid discharged after etching the printed circuit board with acidic etching liquid, and its main composition is CuCl 2 , HCl and a small amount of NH 4 The content of Cl and copper is about 30g / L~160g / L. Alkaline etching waste liquid is the etching waste liquid that is discharged after etching the printed circuit board with alkaline etching liquid. Its main components are ammonia water, copper ammonium chloride complex and ammonium chloride. The copper content is about 40g / L~ 170g / L. Acidic etching waste liquid and alkali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/05
CPCC01G3/05
Inventor 刘志雄陈雪平
Owner 东莞市恒建环保科技有限公司
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