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Method for efficiently and rapidly recovering nickel and phosphorus in chemical nickel-plating waste liquid

A technology of electroless nickel plating and waste liquid, applied in chemical instruments and methods, nickel oxide/nickel hydroxide, inorganic chemistry, etc., can solve environmental problems that cannot be solved, have no research reports, etc., and achieve excellent electrocatalytic oxidation performance , The process is simple and reliable, and the effect of electrocatalytic oxidation is good

Inactive Publication Date: 2015-07-01
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the reaction is repeated, the electroless nickel plating waste solution will eventually be scrapped, and the environmental protection problem still cannot be solved.
There are no relevant research reports

Method used

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  • Method for efficiently and rapidly recovering nickel and phosphorus in chemical nickel-plating waste liquid
  • Method for efficiently and rapidly recovering nickel and phosphorus in chemical nickel-plating waste liquid
  • Method for efficiently and rapidly recovering nickel and phosphorus in chemical nickel-plating waste liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 3mL of hydrogen peroxide solution (30wt%) to 40mL of electroless nickel plating waste solution, stir for 30min, then add 0.22g of aluminum trichloride and 2mL of graphene oxide sheet suspension with a concentration of 10mg / L, and adjust the pH of the solution with NaOH The value is 8. It was synthesized ultrasonically in a nitrogen atmosphere for 20 minutes with an ultrasonic power of 40W, and then crystallized at 100°C for 5 hours. Take out and cool to room temperature, centrifuge, wash, and vacuum dry at 50 °C for 10 h to obtain GO / NiAl-LDHs composite material.

[0037] The electroless nickel plating waste solution is NiSO 4 、Na 2 SO 4 , NaH 2 PO 2 , Lactic acid, H 2 SO 4 and Na 2 HPO 3 A mixed solution in which NiSO 4 The concentration is 0.107mol / L, Na 2 SO 4 The concentration is 0.35mol / L, NaH 2 PO 2The concentration of Lactic acid is 0.24mol / L, the concentration of Lactic acid is 0.30mol / L, the concentration of H 2 SO 4 The concentration is 0.20...

Embodiment 2

[0039] Add 0.30g of aluminum sulfate, 1mL of graphene oxide flake suspension with a concentration of 10mg / L and 5.2g of sodium peroxide to 40mL of electroless nickel plating waste liquid, adjust the pH value of the solution to 6 with NaOH, and ultrasonically synthesize it in a nitrogen atmosphere for 50min , ultrasonic power 60W, and then crystallized at 60°C for 2h. Take out and cool to room temperature, centrifuge, wash, and vacuum dry at 80°C for 6h to obtain GO / NiAl-LDHs composite material.

[0040] The electroless nickel plating waste solution is NiSO 4 、Na 2 SO 4 , NaH 2 PO 2 , Lactic acid, H 2 SO 4 and Na 2 HPO 3 A mixed solution in which NiSO 4 The concentration is 0.50mol / L, Na 2 SO 4 The concentration is 0.25mol / L, NaH 2 PO 2 The concentration of Lactic acid is 0.36mol / L, the concentration of Lactic acid is 0.30mol / L, H 2 SO 4 The concentration is 0.30mol / L, Na 2 HPO 3 The concentration is 0.30mol / L. The pH value of the waste electroless nickel plat...

Embodiment 3

[0042] Add 0.38g of aluminum phosphate, 0.6mL of graphene oxide layer suspension with a concentration of 10mg / L and 2.2g of potassium permanganate to 40mL of electroless nickel plating waste liquid, adjust the pH value of the solution to 11 with NaOH, and ultrasonically The synthesis was carried out for 40 minutes, the ultrasonic power was 100 W, and then crystallized at 60° C. for 4 hours. Take out and cool to room temperature, centrifuge, wash, and vacuum dry at 90°C for 5h to obtain GO / NiAl-LDHs composite material.

[0043] The electroless nickel plating waste solution is NiSO 4 、Na 2 SO 4 , NaH 2 PO 2 , Lactic acid, H 2 SO 4 and Na 2 HPO 3 A mixed solution in which NiSO 4 The concentration is 0.80mol / L, Na 2 SO 4 The concentration is 0.35mol / L, NaH 2 PO 2 The concentration of Lactic acid is 0.30mol / L, the concentration of Lactic acid is 0.50mol / L, H 2 SO 4 The concentration is 0.10mol / L, Na 2 HPO 3 The concentration is 0.20mol / L. The pH value of the elect...

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PUM

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Abstract

The invention discloses a method for efficiently and rapidly recovering nickel and phosphorus in a chemical nickel-plating waste liquid. The method comprises the following steps of: adding inorganic aluminium salt and graphene oxide in the chemical nickel-plating waste liquid as auxiliary raw materials; performing oxidation demulsification by an oxidizing agent, and oxidizing metaphosphate radical into a phosphate radical; preparing by an ultrasonic-assisted coprecipitation method to obtain a GO / NiAl-LDHs composite material; and recovering nickel and phosphorus in the chemical nickel-plating waste liquid by virtue of the GO / NiAl-LDHs composite material. According to the method disclosed by the invention, pollutants such as Ni and P in the chemical nickel-plating waste liquid can be adsorbed in situ during the preparation process for the GO / NiAl-LDHs composite material; the recovery rates of the nickel element and the phosphorus element in the chemical nickel-plating waste liquid achieve more than 93% and 90% respectively; and the decrease rate of chemical oxygen demand achieves more than 90%. The GO / NiAl-LDHs composite material prepared by the method disclosed by the invention is excellent in electrocatalytic oxidation performance for methyl alcohol and ethyl alcohol, excellent in charge-charge performance, and capable of being used as a capacitor material.

Description

1. Technical field [0001] The invention relates to a method for efficiently and quickly recovering nickel and phosphorus in electroless nickel plating waste liquid, and prepares GO / NiAl-LDHs composite material while recovering nickel and phosphorus. 2. Background technology [0002] Electroless nickel plating technology is widely used in industries such as automobiles, moulds, mining and protection. During the plating process, while the nickel ions are reduced, the hypophosphite is oxidized into phosphite. With the continuous accumulation of phosphite, the deposition rate of nickel becomes slower and slower, and the quality of the coating continues to decline, eventually leading to chemical corrosion. The plating solution fails and waste solution is produced. Nickel is a carcinogenic sub-noble metal resource. Phosphorus can cause water paratrophication. Recycling nickel and phosphorus in electroless nickel plating waste liquid has dual significance of environmental protecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04C01G53/04C22B23/00C01B32/198
CPCY02P10/20
Inventor 晋冠平朱晓辉郑海英吴家安
Owner HEFEI UNIV OF TECH
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