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Production technique of high-activity plating-grade copper oxide

A technology of electroplating grade copper oxide and production process, applied in copper oxide/copper hydroxide and other directions, can solve problems such as environmental pollution, low copper oxide activity, activity verification, etc., and achieve low impurity content, high activity, and low production cost. Effect

Active Publication Date: 2010-09-29
昆山市千灯三废净化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above patented methods each have their own advantages and disadvantages, and also have their own obvious shortcomings: method (1) system copper oxide process solution can appear viscous state, will go through multiple washing processes, so a large amount of washing waste water can be produced; method (2) system copper oxide, Because it is made by distilling ammonia for a long time under high temperature and strong alkali state with alkaline etching waste liquid, the activity of copper oxide is also low; method (3) in the process of making copper oxide will produce nitrogen dioxide or nitrogen monoxide waste gas , causing certain pollution to the environment; method (4) produces monoclinic copper oxide, and its activity is not verified experimentally

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The production process with acid copper chloride etching waste liquid and sodium hydroxide as main raw materials is as follows:

[0032] 1. Add 500kg of acidic copper chloride etching waste solution with a copper content of 10% in a 2m3 reactor, add 30% sodium hydroxide solution under stirring, adjust the pH value to 9-13, and open the steam valve to heat , when the temperature reaches 80°C, stop heating and keep it warm for 30-60 minutes; the reactions that occur mainly include:

[0033] h + +OH-=H 2 o

[0034] Cu 2+ +2OH-=Cu(OH) 2

[0035] Cu(OH) 2 =CuO+H 2 o

[0036] 2. Pump the reacted material into the plate and frame filter press for pressure filtration to obtain copper oxide filter cake, and the separated filtrate enters the wastewater treatment system; the process of pressure filtration is a solid-liquid separation process, the purpose is to make the oxidation The separation of copper and liquid is a general process without special requirements; apply t...

Embodiment 2

[0044] The production process with acidic copper sulfate etching waste liquid and potassium hydroxide as main raw materials is as follows:

[0045] 1. At 2m 3 Add 1000KG acidic copper sulfate etching waste liquid with a copper content of 4% to the reaction kettle, add 50% potassium hydroxide solution under stirring, adjust the pH value to 9-13, open the steam valve to heat, when the temperature reaches 100 ℃, stop heating and keep warm for 30-60 minutes, the main reactions are:

[0046] h + +OH - =H 2 o

[0047] Cu 2+ +2OH - =Cu(OH) 2

[0048] Cu(OH) 2 =CuO+H 2 o

[0049] 2. Same as step 2 in Example 1;

[0050] 3. The dried copper oxide enters the pulverizer and pulverizes to 100 mesh;

[0051]4. Transfer the pulverized copper oxide to No. 1 washing bucket, add about 1-2T of pure water, and wash for 20 minutes under stirring;

[0052] 5. Transfer the centrifuged copper oxide into No. 2 washing bucket and repeat the above steps;

[0053] 6. The copper oxide wash...

Embodiment 3

[0057] The production process with acidic copper nitrate etching waste liquid and sodium hydroxide as main raw materials is as follows:

[0058] 1. At 2m 3 Add 800KG acidic copper nitrate etching waste liquid with a copper content of 2% to the reaction kettle, add 10% sodium hydroxide solution under stirring, adjust the pH value to 9-13, open the steam valve to heat, when the temperature reaches 60 ℃, stop heating and keep warm for 30-60 minutes, the main reactions are:

[0059] h + +OH - =H 2 o

[0060] Cu 2+ +2OH - =Cu(OH) 2

[0061] Cu(OH) 2 =CuO+H 2 o

[0062] 2. Same as step 2 in Example 1;

[0063] 3. The dried copper oxide enters the pulverizer and pulverizes to 500 mesh;

[0064] 4. Transfer the pulverized copper oxide to No. 1 washing bucket, add about 1-2T of pure water, and wash for 40 minutes under stirring;

[0065] 5. Transfer the centrifuged copper oxide into No. 2 washing bucket and repeat the above steps;

[0066] 6. The copper oxide washed twic...

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Abstract

The invention mainly takes circuit board acidic copper chloride, or copper nitrate, or copper sulfate etching waste liquid and liquid sodium hydroxide or potassium hydroxide as main raw materials, and the synthesized crude copper oxide is treated by microwave drying, grinding, water washing, ultrasonic washing, secondary microwave drying and grinding, so that copper oxide with the content of more than 99% can be obtained; and the obtained copper oxide can be rapidly dissolved in electroplate liquid, namely is completely dissolved within 30s, and has lower content of impurities. The invention has the advantages of low production cost, simple technique, little pollution caused in the production process, high activity of the produced copper oxide and the like.

Description

technical field [0001] The invention relates to a production process of highly active electroplating grade copper oxide, in particular to a production process of utilizing circuit board acidic etching waste liquid to produce high active electroplating grade copper oxide. Background technique [0002] In the PCB manufacturing process, the traditional copper plating process uses a soluble anode process, using phosphor copper balls as the anode and supplementing the copper source, but the anode mud will be generated and enriched during the electroplating process, which will eventually lead to poor electroplating. , so the traditional soluble anodic copper plating process has the characteristics of poor process stability and low efficiency. [0003] At present, in the PCB manufacturing industry in the market, the horizontal electroplating process is gradually adopted. Since the anode is insoluble, copper oxide is used instead of phosphor copper ball as the copper source, and at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02
Inventor 庄永邹鸿图赵中华钱丽花
Owner 昆山市千灯三废净化有限公司
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