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Additive of electrolytic acidic cupric chloride solution

A copper chloride and additive technology, which is applied in the electrolysis process, electrolysis components, photography process and other directions, can solve the problems of high impurity content and low purity of cathode copper, and achieve the effects of improving purity, simple preparation and enhancing cathode polarization.

Active Publication Date: 2013-01-16
HUNAN ZHIHUI ENVIRONMENTAL PROTECTION CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention aims to provide an additive for electrolytic acidic copper chloride solution, which is used to solve the technical problems of high impurity content and low purity of cathode copper produced by electrolysis in the prior art

Method used

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  • Additive of electrolytic acidic cupric chloride solution

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Embodiment 1

[0013] The electrolytic acid copper chloride additive in the present embodiment one, its component and mass percent content are as follows:

[0014] Propylene glycol polyether: 4%

[0015] Dimethyl-p-phenylenediamine: 2%

[0016] Sodium dodecyl sulfonate: 2%

[0017] Water: 92%

[0018] According to the above ratio configuration, the above additives are added to Cu by mass percentage 0.05~0.3% 2+ Content 50g / L, Cl - Content 180g / L, H + In an acidic copper chloride solution with a concentration of 2mol / L, the temperature is controlled at 35°C, and the current density is 4A / dm 2 After 48 hours of electrolysis, take the cathode copper and dry it to measure the purity of the cathode copper. For details, please refer to the attached figure 1 Middle L1.

Embodiment 2

[0020] In the present embodiment two, electrolytic acid copper chloride additive, its component and mass percent content are as follows:

[0021] Polyethylene glycol ether: 3%

[0022] Hexamethylenediamine: 2%

[0023] Alkyl dipropyl ether disulfonate: 3%

[0024] Water: 92%

[0025] According to the above ratio configuration, the above additives are added to Cu by mass percentage 0.05~0.3% 2+ Content 50g / L, Cl ― Content 180g / L, H + In an acidic copper chloride solution with a concentration of 2mol / L, the temperature is controlled at 35°C, and the current density is 4A / dm 2 After 48 hours of electrolysis, take the cathode copper and dry it to measure the purity of the cathode copper. For details, please refer to the attached figure 1 Middle L2.

Embodiment 3

[0027] The electrolytic acid copper chloride additive of present embodiment three, its component and mass percent content are as follows:

[0028] Allyl alcohol polyoxyalkyl ether: 5%

[0029] Cyclohexylamine: 3%

[0030] Sodium dodecyl sulfonate: 2%

[0031] Water: 90%

[0032] According to the above ratio configuration, the above additives are added to Cu by mass percentage 0.05~0.3% 2+ Content 50g / L, Cl - Content 180g / L, H + In an acidic copper chloride solution with a concentration of 2mol / L, the temperature is controlled at 35°C, and the current density is 4A / dm 2 After 48 hours of electrolysis, take the cathode copper and dry it to measure the purity of the cathode copper. For details, please refer to the attached figure 1 Middle L3.

[0033] Please refer to the attached figure 1 , among the figure L0, L1, L2, L3 correspond to three kinds of cathode copper purity in not adding the additive of the present invention, embodiment one, embodiment two, embodiment three...

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Abstract

The invention discloses an additive of electrolytic acidic cupric chloride solution. The additive comprises, by weight, from 1% to 5% of polyether polyol, from 2% to 4% of amine compounds, from 1% to 3% of sulfonate and from 88% to 96% of solvents which are mixed. A catholic polarization effect of electrolytic copper can be strengthened under the action of hydroxyl in the polyether polyol, discharge of copper ions in cathodes can be suppressed, and crystallization of the cathode copper is refined; growth of crystals can be promoted under the interaction of amine functional groups in the amine compounds and the copper ions; and surface tension of the solution is reduced by the sulfonate, and the surface of the cathode copper is smooth. Accordingly, the additive of the electrolytic acidic cupric chloride solution can guarantee that the cathode copper of the electrolytic acidic cupric chloride solution is compact and smooth, and the effect of increasing the purity of the cathode copper is achieved. Besides, the additive is simple in preparation, low in cost, easy to store and suitable for industrial production and application, and is non-hazardous.

Description

technical field [0001] The invention belongs to the field of acidic copper chloride electrolysis, in particular to an additive for electrolytic acidic copper chloride solution. Background technique [0002] Acidic copper chloride solution etching is an important process in the printed circuit board manufacturing process. With the rapid development of the electronics industry, a large amount of acidic copper chloride etching waste solution is produced. Acidic copper chloride etching waste liquid has the characteristics of great harm and high recovery value, and the current recovery process of acidic copper chloride etching liquid is mainly based on electrolysis, and in the process of electrolysis, high-value cathode copper is easy to form loose surface, Coarse particles, even in the shape of copper thorns, entrain a large amount of acidic copper chloride solution, which seriously affects the recovery value of cathode copper. Therefore, the high purity of cathode copper produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F1/46C25C1/12C25B1/26
CPCY02P10/20
Inventor 郭正安崔磊何世武
Owner HUNAN ZHIHUI ENVIRONMENTAL PROTECTION CONSTR
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