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Method for purifying nickel in electroless nickel plating waste liquid and nickel purifying device

A technology of electroless nickel plating and waste liquid, which is applied in the fields of optics, photographic technology, instruments, etc., can solve the problems of wrong economic and social benefits, difficult to popularize and use, and large consumption of chemicals, so as to simplify the process and reduce electric energy Consumption, no secondary environmental pollution effect

Inactive Publication Date: 2017-06-09
WUXI RUISIKE ENVIRONMENTAL PROTECTION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The chemical method is simple and mature with low investment, but unavoidable secondary pollution, large amount of sediment, large consumption of chemicals and other adverse factors; the traditional electrolytic treatment of electroless nickel plating waste liquid mostly uses insoluble materials as the anode for treatment, and The power consumption is large and the electrolysis efficiency is not high; RO membrane separation technology, at present, this kind of technology has large investment in equipment, high operating cost, unequal economic and social benefits, and is difficult to promote and use

Method used

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  • Method for purifying nickel in electroless nickel plating waste liquid and nickel purifying device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The electroless nickel plating waste liquid is filtered, and the pH of the electroless nickel plating waste liquid is adjusted to 8 by using a sodium hydroxide solution with a mass fraction of 40-60%. Dilute sulfuric acid solution is contained in the anode box 2 . Then the electroless nickel plating waste liquid is introduced into the cathode chamber 1, so that the liquid level of the electroless nickel plating waste liquid is equal to the liquid level in the anode box 2, and the cathode 3 and the anode 4 are energized to start electrolysis. The voltage of the electrolytic process cell is 2.9V, and the current density of the waste liquid is 100A / m 2 , The temperature is 20 ~ 50 ℃. During the electrolysis process, an appropriate amount of lye is added dropwise to the anode chamber 2 to neutralize the acid produced by the electrolysis reaction, so that the pH value of the solution in the anode chamber 2 remains unchanged. During the electrolysis process, the nickel ion ...

Embodiment 2

[0030] The electroless nickel plating waste liquid is filtered, and the pH of the electroless nickel plating waste liquid is adjusted to 8 by using a sodium hydroxide solution with a mass fraction of 40-60%. Dilute sulfuric acid solution is contained in the anode box 2 . Then the electroless nickel plating waste liquid is introduced into the cathode chamber 1, so that the liquid level of the electroless nickel plating waste liquid is equal to the liquid level in the anode box 2, and the cathode 3 and the anode 4 are energized to start electrolysis. The voltage of the electrolytic process cell is 3V, and the current density of the waste liquid is 200A / m 2 , The temperature is 20 ~ 50 ℃. During the electrolysis process, an appropriate amount of lye is added dropwise to the anode chamber 2 to neutralize the acid produced by the electrolysis reaction, so that the pH value of the solution in the anode chamber 2 remains unchanged. During the electrolysis process, the nickel ion co...

Embodiment 3

[0032] The electroless nickel plating waste liquid is filtered, and the pH of the electroless nickel plating waste liquid is adjusted to 8.5 by using a sodium hydroxide solution with a mass fraction of 40-60%. Dilute sulfuric acid solution is contained in the anode box 2 . Then the electroless nickel plating waste liquid is introduced into the cathode chamber 1, so that the liquid level of the electroless nickel plating waste liquid is equal to the liquid level in the anode box 2, and the cathode 3 and the anode 4 are energized to start electrolysis. The voltage of the electrolytic process cell is 3.5V, and the current density of the waste liquid is 300A / m 2 , The temperature is 20 ~ 50 ℃. During the electrolysis process, an appropriate amount of lye is added dropwise to the anode chamber 2 to neutralize the acid produced by the electrolysis reaction, so that the pH value of the solution in the anode chamber 2 remains unchanged. During the electrolysis process, the nickel io...

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Abstract

The invention discloses a method of purifying nickel from chemical nickel-plating waste liquid. The method comprises the following steps: filtering the chemical nickel-plating waste liquid and adjusting the pH value to 8-9; electrolyzing the chemical nickel-plating waste liquid after the pH adjustment, and separating out nickel on a cathode, wherein an anode is located in an anode box, the cathode is located in a cathode chamber, and the anode box is prepared from a ceramic membrane. The anode box prepared from the ceramic membrane is capable of preventing the acid generated by the anode from entering the cathode chamber, thus the adjusted pH environment in the cathode chamber is kept so that the normal separation of nickel on the cathode can be ensured, the high current efficiency of the electrolyzing process can be effectively kept, and the electric energy consumption can be reduced. With the adoption of the nickel purification method, the product nickel deposition surface is flat and smooth, compact in structure and good in metallic lustre, and the quality reaches standard cathode nickel. Correspondingly, the invention further provides a nickel purification device used for realizing the method of purifying nickel from chemical nickel-plating waste liquid.

Description

technical field [0001] The invention belongs to the technical field of industrial secondary resource regeneration of non-ferrous metals, and in particular relates to a method for purifying nickel in electroless nickel plating waste liquid and a nickel purifying device. Background technique [0002] Electroless nickel plating is a kind of electroless plating. Electroless nickel plating technology is widely used in industries such as aerospace, electronic computers, machinery and plastics. After the electroless nickel plating solution is used for several cycles, the content of by-products continues to increase, resulting in deterioration of the performance of the plating solution, a decrease in the quality of the coating, and even pinholes in the coating, and the turbidity of the plating solution, resulting in the scrapping of the electroless nickel plating solution and the generation of waste liquid . [0003] At present, the methods for recovering nickel resources from elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/08C25C7/00
CPCC25C1/08C25C7/00
Inventor 郭志敏郭峰林元吉
Owner WUXI RUISIKE ENVIRONMENTAL PROTECTION SCI & TECH CO LTD
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