Spent Micro-etchant Regeneration and Copper Recovery Equipment

1. Spent microetchant is 100% reclaimed and zero emission. 2. High purity and density copper by-products is produced

1.  Technical Introduction

Spent micro-etchant reclamation technology developed by Vary Tech is mainly apply  to H2SO4-H2O2 micro-etching system. After copper being extracted from spent micro-etchant, the rest of spent solution will be modified and reused in the micro-etchant tank. During the process, spent micro-etchant is 100% reclaimed and it reduces the pollution to the environment.

2.  Application Scope

This technology applies to copper-containing load & unload tank solution generated by chemistry copper pretreatment, chemistry nickel gold pretreatment, inner layer pretreatment, corrosion copper pretreatment and horizon line pretreatment, etc in PCB plants.

3. Equipment Introduction

3.1   Process Flow

Spent H2SO4-H2O2 system micro-etchant is pumped to collecting tank and then successively pumped to dissociation-electrodeposition tank where high purity copper plates are produced. Once cupric content is lower than 5 g/L, stop electrodeposition and check the consistency of H2SO4 and H2O2. Add H2SO4, H2O2 and microetching stabilizer according to the difference between checking value and control value. Then modified micro-etchant is pumped back to micro-etching tank after being proven qualified. 

3.2 Main Specification

Microetching production line (H2SO4-H2O2 syste)

High purity electrode copper

Copper electrodeposition process

Analysis and test

Spent micro-etchant

H2O2 dissociation process

Solution adjustment

Adding chemicals

Qualified micro-etchan

Model	RME-100	RME-200	RME-500	RME-1000
Capacity(L/D)	100	200	500	1000
Power (kw)	5	10	25	50
Floor Space(m2)	5	10	25	50
Operator(s)	1	2	3	4
Electricity Consumption(kW.h/t)	<4000
Reclaim Rate	100%
Copper Recovery Rate	100%

4.  Environmental protection Index

4.1 Exhaust gas reaches National Environmental Protection Standards. Emitted exhaust gas has no foreign odor after being processed.

4.2 Spent microetchant is 100% reclaimed and no wastewater discharged, which reduce the environment pollution.

5.  Features and advantages

5.1 Spent microetchant is 100% reclaimed and zero emission.

5.2 Less floor space and online process.

5.3 Less chemicals consumption, less operation cost.

5.4 High purity and density copper by-products is produced

Spent Micro-etchant Regeneration and Copper Recovery Equipment