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Resource utilization method of copper in etching waste liquid

An etching waste liquid, recycling technology, applied in chemical instruments and methods, copper sulfate, water/sewage multi-stage treatment, etc., can solve problems such as waste of copper and environmental pollution, achieve low energy consumption, reduce investment scale, guarantee The effect of stable operation

Pending Publication Date: 2022-04-15
苏州金渠环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only wastes a lot of copper, but also causes serious pollution to the environment.

Method used

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  • Resource utilization method of copper in etching waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment one: concrete steps are as follows:

[0039] 1) The etching waste liquid is first treated with a ceramic membrane system to remove impurities such as large particles and suspended solids in the waste liquid, and meet the water inlet requirements of the subsequent nanofiltration system. The ceramic membrane has a pore size of 50nm and an operating pressure of 0.1-0.3MPa. The operating temperature is 20-40°C; the specific data are shown in the table below.

[0040] project Copper sulfate (g / L) Turbidity (NTU) Etching waste 0.3 20 Water produced by ceramic membrane 0.3 0.5

[0041] It can be seen from the table that the ceramic membrane system has a good effect on removing impurities such as large particles and suspended solids, and the turbidity of the final system product water is less than 1NTU, which meets the water inlet requirements of the subsequent nanofiltration system and can ensure the stable operation of the system. A...

Embodiment 2

[0049] Embodiment two: concrete steps are as follows:

[0050] 1) The etching waste liquid is first treated with a ceramic membrane system to remove impurities such as large particles and suspended solids in the waste liquid, and meet the water inlet requirements of the subsequent nanofiltration system. The ceramic membrane pore size is 100nm, and the operating pressure is 0.1-0.3MPa. The operating temperature is 20-40°C; the specific data are shown in the table below.

[0051] project Copper sulfate (g / L) Turbidity (NTU) Etching waste 0.5 25 Water produced by ceramic membrane 0.5 0.5

[0052] It can be seen from the table that the ceramic membrane system has a good effect on removing impurities such as large particles and suspended solids, and the turbidity of the final system product water is less than 1NTU, which meets the water inlet requirements of the subsequent nanofiltration system and can ensure the stable operation of the system; At t...

Embodiment 3

[0060] Embodiment three: concrete steps are as follows:

[0061] 1) The etching waste liquid is first treated with a ceramic membrane system to remove impurities such as large particles and suspended solids in the waste liquid, and meet the water inlet requirements of the subsequent nanofiltration system. The ceramic membrane pore size is 20nm, and the operating pressure is 0.1-0.3MPa. The operating temperature is 20-40°C, and the specific data are shown in the table below.

[0062] project Copper sulfate (g / L) Turbidity (NTU) Etching waste 0.45 15 Water produced by ceramic membrane 0.45 0.5

[0063] It can be seen from the table that the ceramic membrane system has a good effect on removing impurities such as large particles and suspended solids, and the turbidity of the final system product water is less than 1NTU, which meets the water inlet requirements of the subsequent nanofiltration system and can ensure the stable operation of the system...

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Abstract

The invention is suitable for the technical field of resource recovery, and provides a resource utilization method of copper in etching waste liquid, the etching waste liquid enters a water inlet tank of a ceramic membrane system, the etching waste liquid is pumped into the ceramic membrane system through a feeding pump and a circulating pump, impurities such as large particles and suspended solids in the waste liquid are removed through ceramic membrane filtration, and the copper in the waste liquid is recycled. The obtained ceramic membrane system produced water enters the ceramic membrane system produced water tank, the etching waste liquid is pretreated by adopting a ceramic membrane technology, and due to the fact that the etching liquid is high in acidity and complex in component, compared with other technologies, a ceramic membrane has the excellent performance of acid resistance, alkali resistance, organic solvent resistance, high temperature resistance and the like, stable operation of the system can be guaranteed, and meanwhile, the production water can be recycled. The pore size of the ceramic membrane is nanoscale, the filtering precision is high, suspended matter impurities in waste liquid can be removed, the turbidity of water produced by the ceramic membrane system is smaller than 1 NTU, the water inlet requirement of a back-section nanofiltration system is met, and stable operation of the nanofiltration system can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of resource recovery, and in particular relates to a resource utilization method of copper in etching waste liquid. Background technique [0002] The circuit board etching solution contains a certain amount of copper sulfate, if it is discharged directly, it will cause serious pollution to the environment. The traditional method is to use electrowinning technology to extract part of the copper and then discharge it. This not only wastes a large amount of copper, but also causes serious pollution to the environment. [0003] The Chinese patent application with the application number CN201210304391.7 discloses an acidic etching solution circulation regeneration system, including sequentially connected etching production line water equipment (1), transfer mother liquor tank (2), mother liquor tank (3), acid etching solution circulation Regenerative equipment group (7), regeneration sub-liquid tank (8), liquid...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01G3/10
Inventor 叶圣武
Owner 苏州金渠环保科技有限公司
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