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A kind of production method of high-purity electroplating grade copper oxide

An electroplating-grade copper oxide and production method technology, which is applied in the direction of copper oxide/copper hydroxide, etc., can solve the problems of not reaching the electroplating level, copper oxide purity is not high, and only reaches the industrial level, and achieves low content of heavy metals and other pollutants , high production efficiency and simple production method

Active Publication Date: 2015-11-18
GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patented process is relatively complicated, and has strict requirements on the order of adding materials and pH adjustment at each stage, and the purity of copper oxide prepared by this patent is not high, only reaching industrial grade
[0004] Chinese patent application number 201110396253.1 discloses a method for producing refined copper oxide using acidic etching waste liquid, using a mixed solution obtained by mixing sodium hydroxide or potassium hydroxide with a strong base and weak acid salt and etching waste liquid to produce refined copper oxide, The prepared copper oxide contains more than 98.5% copper, which has not reached the level of electroplating

Method used

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  • A kind of production method of high-purity electroplating grade copper oxide

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Experimental program
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Embodiment 1

[0025] A production method of high-purity electroplating grade copper oxide, comprising the following steps:

[0026] S1. Raw material preparation: The copper sulfate solution is prepared into a solution with a copper content of 9%, and the supernatant is taken after pressure filtration; the mass ratio of sodium hydroxide and sodium carbonate is 9:1, and the mass fraction of solute is 30 % solution, the supernatant was taken after pressure filtration.

[0027] S2. preparation of copper oxide: the mixed alkali solution after pressure filtration is injected into the reaction kettle, heated to 70 ° C, and the copper sulfate solution after pressure filtration and 30% sodium hydroxide solution are continuously injected into the reaction kettle to control the reaction The pH value is 10, the reaction temperature is 95° C., the stirring speed is 30 r / min, the reaction is continuously stirred, and the reactant is discharged from the bottom of the reaction kettle.

[0028] S3. Purific...

Embodiment 2

[0030] The other conditions are the same as those in Example 1, except that the lye prepared in S1 is an lye with a mass ratio of 8:1 prepared by sodium hydroxide and sodium carbonate, and the stirring speed is 20 r / min.

Embodiment 3

[0032] The other conditions are the same as those in Example 1, except that the lye prepared in S1 is an lye with a mass ratio of 10:1 prepared by sodium hydroxide and sodium carbonate, and the stirring speed is 40 r / min.

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Abstract

The invention discloses a production method of high-purity electroplating grade copper oxide. By taking strong alkali and strong alkali and weak acid salt with mass ratio of (8-10):1 as a pre-reaction solution, continuously pumping a copper sulfate solution and a sodium hydroxide solution into a reaction kettle according to a certain flow ratio, controlling the pH to be 8-12, and the temperature to be 90-100 DEG C, stirring and reacting, and carrying out treatment on reactants through working procedures such as washing, filtering and roasting to obtain the electroplating grade copper oxide.

Description

technical field [0001] The invention relates to a method for producing copper oxide, in particular to a method for producing high-purity electroplating-grade copper oxide. Background technique [0002] High-purity electroplating-grade copper oxide is widely used in vertical continuous hole-filling electroplating production lines of high-precision electronic communication components in electronic enterprises. Due to the high purity requirements of high-purity electroplating-grade copper oxide products, the current production of electroplating-grade copper oxide mainly includes the following: Two methods: one is to use crude copper oxide as raw material to obtain electroplating-grade copper oxide by washing, drying, roasting and other methods; The third is to use a copper-containing solution to react with a liquid alkali, and to obtain electroplating-grade copper oxide by repeatedly beating and washing the reactants, roasting powder and other processes. [0003] Chinese paten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/02
Inventor 王永成吴阳东刘杨韩福勇廖悦鉴熊建民
Owner GUANGZHOU KECHENG ENVIRONMENTAL PROTECTION TECH