Method for preparing nickel hypophosphite by electrolytic method
A technology of nickel hypophosphite and electrolysis, applied in electrolysis process, electrolysis components, etc., can solve the problems of long operation time and cumbersome steps, and achieve the effect of cheap price, simple process and easy large-scale industrial production
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Embodiment 1
[0024] refer to figure 1 : Schematic diagram of the working principle of a six-chamber electrodialysis cell, including an anode chamber, a product chamber, a buffer chamber, a raw material chamber, a buffer chamber and a cathode chamber.
[0025] The anode material is a nickel plate, and the electrode area is 40cm 2 , The cathode is a stainless steel electrode. Anion and cation exchange membranes were purchased from Shanghai Chemical Plant, and the membrane area used in electrolysis was 70cm 2 . The solution volume of each chamber of the six-chamber electrodialysis cell is 450mL. The initial solution of the anode chamber before electrolysis is 10g / L sulfuric acid, the raw material chamber is 400g / L sodium hypophosphite, the cathode chamber and its adjacent buffer chamber are both 10g / L sodium hydroxide, and the product chamber and its adjacent buffer chamber are both 10g / L nickel hypophosphite.
[0026] The working voltage is 10-15V, and the current is kept between 0.5A-2...
Embodiment 2
[0030] The initial working conditions of the six-chamber electrodialysis cell are the same as in Example 1.
[0031] Keep the anode potential at 2.0V during work, and the ion concentrations in the solution in the product chamber obtained under different electrolysis times are shown in Table 2.
[0032] Electrolysis time
[0033] H in the solution prepared under different electrolysis time in the product room 2 PO 2 - Molar concentration and Ni 2+ The ratio of the molar concentration is between 2.37 and 3.33, which is consistent with the H in the acidic electroless nickel plating solution. 2 PO 2 - with you 2+Concentration ratio, so this solution can be directly used as electroless nickel plating solution, and through decompression enrichment, can also make the concentrated solution as supplementary liquid in the electroless nickel plating process.
Embodiment 3
[0035] The initial working conditions of the six-chamber electrodialysis cell are the same as in Example 1.
[0036] When the working anode potential is 2.0V, after 16 hours of electrolysis, the concentrations of sodium ions and sulfate ions in the product chamber are all lower than the ppm level.
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