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Resourceful treatment method of chemical nickel plating waste liquid

A technology of electroless nickel plating and treatment methods, which is applied in the directions of chemical instruments and methods, liquid chemical plating, metallurgical wastewater treatment, etc., which can solve the problems of increased treatment cost, difficult treatment, high cost, etc., to save treatment cost and shorten oxidation The effect of using less technology and medicine

Active Publication Date: 2021-05-07
DONGJIANG ENVIRONMENTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) A large amount of sludge containing phosphorus, nickel and iron is produced, which greatly increases the treatment cost, introduces a large number of new pollution factors, and increases the difficulty of processing the electroless nickel plating waste liquid;
[0007] (2) The nature of the electroless nickel plating waste liquid is very complex, and the concentration is high, the treatment is difficult, and a large amount of treatment chemicals needs to be added, and the cost is high

Method used

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  • Resourceful treatment method of chemical nickel plating waste liquid
  • Resourceful treatment method of chemical nickel plating waste liquid
  • Resourceful treatment method of chemical nickel plating waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The electroless nickel plating waste liquid that this embodiment takes, pH is 4.5, and total nickel content is 6700mg / L, and total phosphorus content is 70000mg / L, and COD value is 102000mg / L, and Na + The concentration is 35000mg / L, SO 4 2- The concentration is 71300mg / L.

[0038] S1. Oxidation and decompression: Take 1.0L of electroless nickel plating waste solution, add sodium hydroxide solution to adjust the pH to 6, then add 175g of hydrogen peroxide with a mass concentration of 40%, mix well, and add to the interior filled with heterogeneous Fenton Aerated and oxidized for 5 hours in the oxidation tower of the catalyst to obtain an acidic reaction solution;

[0039] S2. Synchronous precipitation of nickel and phosphorus: detect that the pH of the acidic reaction solution is 4.4, add 10% sodium hydroxide solution to the acidic reaction solution to adjust the pH to 7.5, and slowly add 1.3L with a mass concentration of 30% under stirring at 200rpm The nickel sulfa...

Embodiment 2

[0043] The electroless nickel plating waste liquid that this embodiment takes, pH is 3.7, and total nickel content is 5120mg / L, and total phosphorus content is 41000mg / L, and COD value is 65000mg / L, and Na + The concentration is 25800mg / L, SO 4 2- The concentration is 52300mg / L.

[0044] The difference between this example and Example 1 is: in step S1, the pH is adjusted to 5.5, the mass concentration of hydrogen peroxide is 27.5%, the mass is 150g, and the oxidation reaction time is 3h; in step S2, the pH is 4.2 after the oxidation is complete, Adjust the pH to 7.8, the mass concentration of the nickel sulfate solution is 15%, the volume is 1.7L, and the aging time is 0.5h; in step S3, the volume of the sodium hydroxide solution is 70mL, and the pH is adjusted to 12.03 to obtain the second filtrate 2.6 L; in step S4, take 2.5L of the second filtrate, the conductivity is 90mS / cm, the voltage is 25.0V, the current is 3.4A, the working temperature is 35°C, and the adding volum...

Embodiment 3

[0046] The electroless nickel plating waste liquid that this embodiment takes, pH is 3.2, and total nickel content is 2030mg / L, and total phosphorus content is 25000mg / L, and COD value is 32000mg / L, and Na + The concentration is 21600mg / L, SO 4 2- The concentration is 44500mg / L.

[0047] The difference between this example and Example 1 is: in step S1, the pH is adjusted to 5.5, the mass concentration of hydrogen peroxide is 27.5%, the mass is 108g, and the oxidation reaction time is 2h; in step S2, the pH is 4.8 after the oxidation is complete, The mass concentration of the nickel sulfate solution is 15%, the volume is 0.47L, and the aging time is 0.5h; in step S3, the volume of the sodium hydroxide solution is 80mL, and the pH is adjusted to be 11.85 to obtain the second filtrate 1.5L; in step S4 , take 1.5L of the second filtrate, adjust the pH to 7.8, the current is 4.0A, the working temperature is 35°C, and the volumes added to the salt chamber, acid chamber, and alkali...

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Abstract

The invention relates to the technical field of waste water resourceful treatment, in particular to a resourceful treatment method of chemical nickel plating waste liquid. The method comprises the following steps: oxidation complex breaking, synchronous precipitation of nickel and phosphorus, secondary precipitation of nickel and sodium salt resourceful treatment. According to the method, sludge is not generated in the reaction process, secondary pollution to the environment can be prevented, the technological process is short, the use amount of chemicals is small, the treatment cost is greatly reduced, resource recycling of nickel, phosphorus, sodium, sulfate radicals or chlorine in the chemical nickel plating waste liquid is achieved, and the method is a low-cost and clean resource treatment method.

Description

technical field [0001] The invention relates to the technical field of waste water resource treatment, more specifically, it relates to a resource treatment method of electroless nickel plating waste liquid. Background technique [0002] Electroless nickel plating has become a mainstream surface treatment technology due to its superiority in coating uniformity, corrosion resistance, and wear resistance, and is widely used in electronic products, aerospace, and machinery manufacturing. During the electroless nickel plating process, as the oxidation-reduction reaction continues, the accumulation of by-products such as phosphite will cause the aging of the plating solution and form a large amount of waste electroless nickel plating solution. [0003] The main component of electroless nickel plating waste solution is Na + 、H 2 PO 2 - 、HPO 3 2- 、PO 4 3- , SO 4 2- (or Cl - ), free Ni 2+ , complexed nickel and organic matter. At present, most of the research in the ind...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C23C18/16C25B1/20C01B25/37C01G53/04C02F103/16C02F101/10
CPCC02F9/00C23C18/1617C25B1/20C01B25/37C01G53/04C02F1/66C02F1/722C02F1/52C02F1/001C02F1/4693C02F2103/16C02F2101/105
Inventor 李姗婷谭侃徐文彬张艳华肖勇俊郭杏林何龙
Owner DONGJIANG ENVIRONMENTAL