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Method for treating chemical nickel-plating waste liquid by utilizing autocatalytic reaction

A technology of electroless nickel plating and autocatalysis, applied in chemical instruments and methods, filtration treatment, precipitation treatment, etc., can solve the problems of ineffective removal of nickel metal, complicated process operation, reduction of nickel concentration, etc., so as to reduce production and operation costs. Economic benefits, good removal effect, good metallic luster effect

Inactive Publication Date: 2020-08-28
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among these methods, the chemical precipitation method is currently the most widely used method for the treatment of electroless nickel plating waste liquid. By adding a precipitant to the waste liquid, the nickel ions are converted into carbonates, hydroxides, oxides or sulfides. Form precipitation, separation from waste liquid, and purification of waste liquid. This method requires a large amount of drugs, produces a large amount of waste residue, is prone to secondary pollution, and has defects such as high cost, high energy consumption, and complicated process operations.
However, none of the methods in the prior art can effectively remove the nickel metal in the waste liquid, nor can it minimize the concentration of nickel in the effluent, nor can it meet the requirements of discharge standards.

Method used

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  • Method for treating chemical nickel-plating waste liquid by utilizing autocatalytic reaction
  • Method for treating chemical nickel-plating waste liquid by utilizing autocatalytic reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method utilizing autocatalytic reaction to process electroless nickel plating waste liquid, comprising the following steps:

[0037] (1) Add caustic soda powder to the waste electroless nickel plating liquid, adjust the pH of the waste electroless nickel plating liquid to be treated to be 10, then carry out ultrasonic dispersion for 40min;

[0038] (2) Add treatment preparation to the electroless nickel plating waste liquid to be treated after ultrasonic dispersion, and obtain reaction solution after fully reacting for 40 minutes; The treatment preparation is to include a support body and a reaction layer deposited on the support body, so The particle diameter of the support body is 0.7mm, the reaction layer is nickel chloride, the reaction layer accounts for 1% by mass of the treatment preparation, and the material of the support body is selected from titanium dioxide or corundum; The addition amount of treatment preparation is 10g / L;

[0039] (3) The reaction solut...

Embodiment 2

[0056] A method utilizing autocatalytic reaction to process electroless nickel plating waste liquid, comprising the following steps:

[0057] (1) Add caustic soda powder to the waste electroless nickel plating liquid, adjust the pH of the waste electroless nickel plating liquid to be treated to be 11, then carry out ultrasonic dispersion for 30min;

[0058] (2) Add treatment preparation to the electroless nickel plating waste liquid to be treated after ultrasonic dispersion, obtain reaction solution after fully reacting for 45min; Described treatment preparation is to comprise support body and be deposited on the reaction layer on described support body, so The particle diameter of the support body is 0.6mm, the reaction layer is nickel chloride, the reaction layer accounts for 2% by mass of the treatment preparation, and the material of the support body is selected from titanium dioxide or corundum; The addition amount of treatment preparation is 5g / L;

[0059] (3) The react...

Embodiment 3

[0076] A method utilizing autocatalytic reaction to process electroless nickel plating waste liquid, comprising the following steps:

[0077] (1) Add caustic soda powder to the electroless nickel plating waste liquid, adjust the pH of the chemical nickel plating waste liquid to be treated to be 10-11, and then carry out ultrasonic dispersion for 30min-40min;

[0078] (2) Add a treatment preparation to the electroless nickel plating waste liquid to be treated after ultrasonic dispersion, and obtain a reaction solution after fully reacting for 40min-45min; the treatment preparation includes a support body and a reaction layer deposited on the support body , the particle size of the supporting body is 0.6mm-0.7mm, the reaction layer is nickel chloride, the mass percentage of the reaction layer in the treatment preparation is 1%-2%, and the material of the supporting body is selected From titanium dioxide or corundum; the addition amount of the treatment preparation is 5g / L-10g / L;...

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Abstract

The invention discloses a method for treating chemical nickel-plating waste liquid by utilizing an autocatalytic reaction. The method comprises the following steps: (1) adjusting the pH value of to-be-treated chemical nickel-plating waste liquid to be 10-11; (2) adding a treatment preparation into the to-be-treated chemical nickel-plating waste liquid subjected to ultrasonic dispersion; (3) standing and layering the reaction liquid; (4) adding halogen powder into the solution obtained in the step (3); (5) putting the solution filtered in the step (4) into a cathode chamber of an electrolytic cell for electrolysis; and (6) adding a calcium chloride solution into the solution obtained after electrolysis. According to the method, the mechanism of the chemical nickel autocatalytic reaction isutilized, various elements are recycled at a time, the cost is low, the process is short, the efficiency is high, operation is easy and convenient, and recycling and reusing of nickel resources are facilitated.

Description

technical field [0001] The invention relates to the technical field of comprehensive recycling of chemical waste liquid, in particular to a method for treating waste chemical nickel plating liquid by using autocatalytic reaction. Background technique [0002] Electroless nickel plating is a surface treatment technology that generates Ni-P amorphous coating through the action of nickel salt and hypophosphite, which can effectively improve the corrosion resistance and wear resistance of the workpiece. It has been widely used in various fields due to its advantages such as high hardness, good wear resistance, and no limitation of size and shape of plated parts. However, the electroless nickel plating solution is unstable and has a short service life due to its own reduction reaction properties. It is difficult to separate nickel ions from waste liquid; therefore, research on the treatment of electroless nickel plating waste liquid has attracted more and more attention. [000...

Claims

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Application Information

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IPC IPC(8): C02F9/06C05G1/00C02F103/16C02F101/20C02F101/10
CPCC02F9/00C05B17/00C05G1/00C02F2103/16C02F1/36C02F1/66C02F1/001C02F2001/007C02F1/58C02F1/461C02F2101/20C02F2101/105C05D3/00C05F11/00
Inventor 杜建伟贺框苏闯张明杨辜剑波张静潘南明关伟胡小英邓金珠
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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