Alkaline etching ammonia recycling system

An ammonia recovery and alkaline technology, applied in the field of alkaline etching ammonia recovery and utilization system, can solve the problems of environmental pollution, hazardous waste, high cost, etc., and achieve the effect of reducing energy consumption

Inactive Publication Date: 2019-11-05
安徽绿洲危险废物综合利用有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, after the alkaline etching solution extracts metal copper, a large amount of ammonia nitrogen mixture remains, which will cause great pollution t...

Method used

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  • Alkaline etching ammonia recycling system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present invention provides such Figure 1-2 A kind of alkaline etching ammonia recycling system shown, comprises the following steps:

[0026] S1: Select an alkaline etching solution with a copper content of 120-180g / L, add it to the extraction tank, and add a hydrophobic β-diketone extractant with a concentration of 100mol / L for stirring, and add a separatory funnel inside, wait After standing for stratification, take out the water phase and the alkali phase in the separating funnel respectively, and set aside, the chemical reaction equation is as follows:

[0027]

[0028] S2: Put the alkaline phase solution prepared in step S1 into the same container according to the same percentage, and add 2mol / L, 3mol / L and 4mol / L sulfuric acid solutions as stripping agents in the three containers respectively, Under the condition that the reaction temperature is 10 degrees, the alkali phase solutions added with different concentrations of sulfuric acid solutions are respe...

Embodiment 2

[0035] The invention provides a system for recycling alkaline etching ammonia, comprising the following steps:

[0036] S1: Select an alkaline etching solution with a copper content of 120-180g / L, add it to the extraction tank, and add a hydrophobic β-diketone extractant with a concentration of 100mol / L for stirring, and add a separatory funnel inside, wait After standing for stratification, take out the water phase and the alkali phase in the separating funnel respectively, and set aside, the chemical reaction equation is as follows:

[0037]

[0038] S2: Put the alkaline phase solution prepared in step S1 into the same container according to the same percentage, and add 2mol / L, 3mol / L and 4mol / L sulfuric acid solutions as stripping agents in the three containers respectively, Under the condition that the reaction temperature is 25 degrees, the alkali phase solutions added with different concentrations of sulfuric acid solutions are respectively reacted to generate copper ...

Embodiment 3

[0045] The invention provides a system for recycling alkaline etching ammonia, comprising the following steps:

[0046] S1: Select an alkaline etching solution with a copper content of 120-180g / L, add it to the extraction tank, and add a hydrophobic β-diketone extractant with a concentration of 100mol / L for stirring, and add a separatory funnel inside, wait After standing for stratification, take out the water phase and the alkali phase in the separating funnel respectively, and set aside, the chemical reaction equation is as follows:

[0047]

[0048] S2: Put the alkaline phase solution prepared in step S1 into the same container according to the same percentage, and add 2mol / L, 3mol / L and 4mol / L sulfuric acid solutions as stripping agents in the three containers respectively, Under the condition that the reaction temperature is 40 degrees, the alkali phase solutions added with different concentrations of sulfuric acid solutions are respectively reacted to form a copper su...

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Abstract

The invention provides an alkaline etching ammonia recycling system. The system comprises the following steps of adding sulfuric acid solutions of different concentrations as reverse extraction agentsinto three containers; performing reaction on alkali-phase solutions added with the sulfuric acid solutions of different concentrations to obtain a copper sulfate solution at the reaction temperatureof 10 DEG C-60 DEG C; leaving the copper sulfate solution subjected to cooling at room temperature to obtain a solution containing crystalline copper sulfate; and adding ammonia and ammonium chlorideinto a reaction kettle, and then heating the temperature and stirring the mixer so as to obtain an alkaline etching liquid. According to the alkaline etching ammonia recycling system, a method of extraction is adopted to divide the alkaline etching liquid into an aqueous phase and an alkali phase for separated treatment; and while the aqueous phase is used as a regeneration resource of a new etching liquid, the alkaline liquid is subjected to effects of extraction and reverse extraction, copper resource within is recycled, and during the process of recycling, all waste liquid is regenerated,no wastewater is discharged, and therefore the purpose of saving through resource recycling and re-utilization is achieved, and energy consumption is reduced as well.

Description

technical field [0001] The invention relates to the field of alkaline etching solution recovery, in particular to an alkaline etching ammonia recovery and utilization system. Background technique [0002] The alkaline etching waste liquid contains copper ammonium complex, ammonium chloride and ammonia water, and the copper content can reach 120-170g / L. If it is discharged directly, it will bring serious harm to the environment. In the production of printed boards, it is necessary to recycle the etching waste liquid to make full use of resources, reduce costs, and reduce pollutant emissions. [0003] However, after the alkaline etching solution extracts metal copper, a large amount of ammonia nitrogen mixture remains, which will cause great pollution to the environment. Direct treatment will generate a large amount of hazardous waste, and in the process of wastewater treatment, the cost is high and the return is low. [0004] Therefore, it is necessary to invent a kind of a...

Claims

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Application Information

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IPC IPC(8): C23F1/46C01G3/10
CPCC01G3/003C01G3/10C23F1/46
Inventor 袁胜巧谢付元付二龙
Owner 安徽绿洲危险废物综合利用有限公司
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