Electroplating platinum electrolyte regeneration device
Through the electroplating plating electrolyte regeneration device, the concentration of Pt(IV) and Pt(II) is adjusted by catalytic action of ozone and manganese dioxide, which solves the adverse effect of Pt(II) on the electroplating plating layer under low cathode current density, and realizes the online regeneration and quality assurance of the electrolyte.
Patent Information
- Application Number
- CN202422104693.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-08-29
AI Technical Summary
At lower cathode current density, Pt(IV) is easily reduced to Pt(II), affecting the quality and performance of the electroplating plating layer.
An electroplating platinum electrolyte regeneration device is adopted, including an oxidation box, an ozone generator, a reaction tower and an electrochemical workstation. By controlling the ozone supply amount and the catalytic action of manganese dioxide, the concentration ratio of Pt(IV) and Pt(II) in the electrolyte is adjusted to realize the online regeneration of the electrolyte.
It effectively solved the problem of deterioration of the electrolyte performance of Pt(II), ensured the quality and performance of the electroplating plating solution, and realized the online supplement and regeneration of the electrolyte.
Smart Images
Figure CN223240199U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrochemistry, in particular to a platinum electroplating electrolyte regeneration device. Background Art
[0002] Platinum electroplating electrolyte refers to the electrolyte solution used to deposit platinum on the surface of an object during the electroplating process. It is an important component of the electrochemical reaction. Through the electrolysis process, platinum is deposited on the surface of the plated object, forming a platinum coating. Platinum electroplating electrolyte is a special solution that dissolves substances that can ionize platinum ions (such as platinum salts), as well as other additives (such as stabilizers, buffers, etc.) that may be needed to maintain the stability of the electrolyte and the smooth progress of the electroplating process. During the electroplating process, the electrolyte plays the role of conducting current, providing platinum ions, and maintaining the balance of the electrochemical reaction.
[0003] In order to meet the performance requirements of electronic components, platinum electroplating must be carried out at a relatively low cathode current density. However, at a low cathode current density, Pt(IV) is easily reduced to Pt(II) and exists in the electrolyte. Pt(II) has an adverse effect on the quality and performance of the platinum coating. Therefore, we proposed a platinum electroplating electrolyte regeneration device to solve the above problems. Utility Model Content
[0004] Technical problem: In the existing technology, platinum electroplating must be carried out at a relatively low cathode current density. However, at a low cathode current density, Pt(IV) is easily reduced to Pt(II) and exists in the electrolyte, and Pt(II) has an adverse effect on the quality and performance of the platinum coating. The utility model proposes a platinum electroplating electrolyte regeneration device.
[0005] Technical solution: A platinum electroplating electrolyte regeneration device includes an oxidation box, an ozone generator is provided on one side of the oxidation box, the ozone generator and the oxidation box are connected by a gas pipe, a bubbler is provided at the bottom end of the interior of the oxidation box, a liquid infusion pipe is provided above one side of the oxidation box, a reaction tower is provided on the other side of the oxidation box, the reaction tower and the oxidation box are connected by a connecting pipe, and a drain pipe is provided above the other side of the reaction tower.
[0006] Preferably, a platinum electrode, a graphite electrode and a reference electrode are respectively provided inside the oxidation box, and the output ends of the platinum electrode, the graphite electrode and the reference electrode are all electrically connected to the input end of the electrochemical workstation monitoring system.
[0007] Preferably, the reaction tower is filled with manganese dioxide particles.
[0008] Preferably, one or more uniformly distributed heating tubes are provided inside the reaction tower.
[0009] Preferably, a pump body is provided in the middle of the connecting pipe.
[0010] Preferably, a filter is provided between the drain pipe and the reaction tower.
[0011] Beneficial effects: Compared with the prior art, the salient features of this utility model are:
[0012] 1. The oxidation chamber can hold 10% to 15% of the volume of the plating tank electrolyte. The plating tank and oxidation chamber are connected by a liquid delivery tube. An ozone generator is installed on one side of the oxidation chamber and connected to the oxidation chamber via a gas delivery tube. By controlling the ozone supply, the Pt(IV) to Pt(II) concentration ratio in the electrolyte in the oxidation chamber is adjusted to a predetermined level, and this portion of the electrolyte is then returned to the plating chamber. This device allows for online replenishment of the platinum electroplating electrolyte, effectively resolving the problem of deteriorating electrolyte performance due to Pt(II) generated at the cathode during platinum electroplating at low cathode current densities. Furthermore, the device is connected to an electrochemical workstation via a platinum electrode, a graphite electrode, and a reference motor for real-time monitoring. The electrochemical workstation monitors the Pt(II) ion reduction peak and the Pt(IV) ion reduction peak in real time, and calculates the divalent Pt ion content based on their strength. Once the standard is reached, the plating solution can be reused.
[0013] 2. A reaction tower is set up on the other side of the oxidation box, a large amount of manganese dioxide is added to the reaction tower, the oxidation box and the reaction tower are connected together through a connecting pipe, and the predetermined electrolyte is transported to the reaction tower by a pump body. The reaction tower is heated by a heating pipe, and the manganese dioxide inside the electrolyte is used to remove excess ozone, thereby forming a regenerated platinum plating solution and transporting it to the electroplating tank through a drain pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0015] Figure 2 This is an internal cross-sectional view of the overall structure of the utility model;
[0016] Figure 3 This is a diagram of the electrochemical workstation monitoring system of the present utility model;
[0017] In the figure: 1. Ozone generator; 2. Oxidation box; 3. Liquid infusion pipe; 4. Gas infusion pipe; 5. Connecting pipe; 6. Pump body; 7. Reaction tower; 8. Drain pipe; 9. Platinum electrode; 10. Graphite electrode; 11. Reference electrode; 12. Electrochemical workstation monitoring system; 13. Bubbler; 14. Heating tube; 15. Filter. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.
[0019] like Figure 1-3 As shown, the utility model provides a platinum electroplating electrolyte regeneration device, including an oxidation box 2; and also includes: an ozone generator 1, which is arranged on one side of the oxidation box 2, and the ozone generator 1 and the oxidation box 2 are connected by a gas pipe 4, a bubbler 13 is provided at the bottom end of the interior of the oxidation box 2, a liquid infusion pipe 3 is provided above one side of the oxidation box 2, and a reaction tower 7 is provided on the other side of the oxidation box 2, and the reaction tower 7 and the oxidation box 2 are connected by a connecting pipe 5, and a drain pipe 8 is provided above the other side of the reaction tower 7.
[0020] Furthermore, an ozone generator 1 is installed on one side of the oxidation tank 2 and connected to the oxidation tank 2 via a gas pipe 4. By controlling the ozone supply, the concentration ratio of Pt(IV) to Pt(II) in the electrolyte in the oxidation tank 2 reaches a predetermined level, and this electrolyte is then returned to the electroplating tank. This method allows the electrolyte for platinum electroplating to be replenished online, effectively solving the problem of deteriorating electrolyte performance due to Pt(II) generated at the cathode during platinum electroplating at low cathode current density.
[0021] like Figure 3 As shown, a platinum electrode 9, a graphite electrode 10 and a reference electrode 11 are respectively provided inside the oxidation box 2. The output ends of the platinum electrode 9, the graphite electrode 10 and the reference electrode 11 are electrically connected to the input end of the electrochemical workstation monitoring system 12 for monitoring the chemical reaction between ozone and the platinum plating solution.
[0022] like Figure 2 As shown, the reaction tower 7 is filled with a large amount of manganese dioxide particles. Manganese dioxide exhibits good catalytic performance in many chemical reactions, especially those involving redox reactions, so that excess ozone can be decomposed.
[0023] The reaction tower 7 is provided with a number of evenly distributed heating tubes 14. Under high temperature, the molecular motion of the manganese dioxide particles is intensified, and the active sites are more easily exposed and contacted with the platinum plating solution containing a large amount of ozone, thereby accelerating the reaction rate.
[0024] Furthermore, a pump body 6 is provided in the middle of the connecting pipe 5 , and the platinum plating solution is transported to the interior of the reaction tower 7 through the pump body 6 .
[0025] like Figure 1 As shown, a filter screen 15 is provided between the drain pipe 8 and the reaction tower 7 to prevent impurities and manganese dioxide particles from being discharged through the drain pipe 8 .
[0026] Working principle: The platinum plating solution to be treated is input into the interior of the oxidation box 2 through the infusion pipe 3, and the ozone inside the ozone generator 1 is input into the bubbler 13 through the gas pipe 4. The ozone is dispersed by the bubbler 13 and chemically reacts with the platinum plating solution to be treated. The platinum plating solution is monitored by the platinum electrode 9, the graphite electrode 10 and the reference electrode 11. When the appropriate standard is reached, the platinum plating solution can be transported to the reaction tower 7 through the pump body 6. By reacting with the manganese dioxide particles inside the reaction tower 7, the excess ozone inside the platinum plating solution can be removed to form a regenerated platinum plating solution, which is then transported to the electroplating tank through the drain pipe 8.
Claims
1. A platinum electroplating electrolyte regeneration device, comprising an oxidation box (2), characterized in that: An ozone generator (1) is provided on one side of the oxidation box (2), and the ozone generator (1) and the oxidation box (2) are connected via a gas transmission pipe (4). A bubbler (13) is provided at the bottom end of the interior of the oxidation box (2). A liquid transmission pipe (3) is provided above one side of the oxidation box (2). A reaction tower (7) is provided on the other side of the oxidation box (2), and the reaction tower (7) and the oxidation box (2) are connected via a connecting pipe (5). A liquid discharge pipe (8) is provided above the other side of the reaction tower (7).
2. The platinum electroplating electrolyte regeneration device according to claim 1, characterized in that: A platinum electrode (9), a graphite electrode (10) and a reference electrode (11) are respectively provided inside the oxidation box (2), and the output ends of the platinum electrode (9), the graphite electrode (10) and the reference electrode (11) are electrically connected to the input end of the electrochemical workstation monitoring system (12).
3. The platinum electroplating electrolyte regeneration device according to claim 1, characterized in that: The reaction tower (7) is filled with manganese dioxide particles.
4. The platinum electroplating electrolyte regeneration device according to claim 1, characterized in that: A plurality of evenly distributed heating tubes (14) are provided inside the reaction tower (7).
5. The platinum electroplating electrolyte regeneration device according to claim 1, characterized in that: A pump body (6) is provided in the middle of the connecting pipe (5).
6. The platinum electroplating electrolyte regeneration device according to claim 1, characterized in that: A filter screen (15) is provided between the liquid discharge pipe (8) and the reaction tower (7).