WO2014156761A1 - 電気ニッケルめっき液中の希土類不純物の除去方法 - Google Patents
電気ニッケルめっき液中の希土類不純物の除去方法 Download PDFInfo
- Publication number
- WO2014156761A1 WO2014156761A1 PCT/JP2014/057107 JP2014057107W WO2014156761A1 WO 2014156761 A1 WO2014156761 A1 WO 2014156761A1 JP 2014057107 W JP2014057107 W JP 2014057107W WO 2014156761 A1 WO2014156761 A1 WO 2014156761A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plating solution
- rare earth
- plating
- impurities
- tank
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/18—Regeneration of process solutions of electrolytes
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/06—Filtering particles other than ions
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/10—Agitating of electrolytes; Moving of racks
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
Definitions
- the present invention relates to a method for efficiently and easily removing rare earth impurities in an electro nickel plating solution.
- rare earth magnets especially R-Fe-B sintered magnets (R is at least one of rare earth elements including Y and must contain Nd) have high magnetic properties and are widely used.
- Nd and Fe contained as main components are very rusting. For this reason, a rust preventive film is given to the magnet surface for the purpose of improving corrosion resistance.
- electronickel plating has high hardness, and the management of the plating process is simpler than electroless plating, and is widely adopted for this magnet.
- the components of the object to be plated may be dissolved in the plating solution simultaneously with the film formation.
- the pH of the plating solution is inclined to the acidic side, the object to be plated is easily dissolved in the plating solution, and therefore the object to be plated accumulates as impurities in the plating solution.
- the main component rare earth elements such as Nd and Fe dissolve in the plating solution and become impurities. Therefore, when the plating process is continued, rare earth impurities such as Nd and Fe, which are main components of the magnet material, and Fe dissolve and accumulate in the plating solution.
- Nd and Fe which are main components of the magnet material
- Fe dissolve and accumulate in the plating solution.
- the amount of rare earth impurities is 700 ppm (mainly Nd impurities). If it exceeds, these defects are likely to occur. Furthermore, in plating by the barrel method, a large current flows locally to the object to be plated, so that double plating is likely to occur.
- a nickel compound such as nickel carbonate is added to the plating solution, and the pH of the plating solution is increased (at the same time, activated carbon is added to remove organic impurities).
- impurities are precipitated by further stirring with air, followed by filtration, or by immersing an iron net or plate in the plating solution and cathodic electrolysis at a low current density. ing.
- Japanese Patent Laid-Open No. 7-62600 discloses a method for removing rare earth impurities from an electronickel plating solution using a chemical used for purification and separation of rare earth metals. This method is considered to be effective as one of the methods for reducing rare earth impurities in the electronickel plating solution.
- it is necessary to employ a complicated process, which is not efficient, and a special drug is required, which is not realistic.
- an object of the present invention is to provide a relatively simple and efficient method for removing rare earth impurities in an electronickel plating solution that does not require a complicated process and does not require a special chemical. is there.
- the present inventors added a rare earth compound to an electronickel plating solution containing a rare earth impurity and kept at a temperature of 60 ° C. or higher for a certain period of time, thereby depositing a rare earth impurity, The inventors have found that it can be easily removed by filtration and have arrived at the present invention.
- the method of the present invention for removing rare-earth impurities in the electro-nickel plating solution includes adding a rare-earth compound to the electro-nickel plating solution containing the rare-earth impurities and holding it at a temperature of 60 ° C. or higher for a certain period of time.
- the deposited deposit is removed from the electronickel plating solution by precipitation and / or filtration together with the added rare earth compound.
- the rare earth compound is preferably a rare earth oxide.
- the rare earth element constituting the rare earth compound is preferably neodymium.
- the agitation is preferably agitation by air, rotation of a stirring blade, or circulation of liquid by a pump.
- the rare earth impurities in the electro nickel plating solution can be removed relatively easily and efficiently without employing a complicated process and without using a special agent. Therefore, it is possible to achieve quality stabilization and cost reduction of electro nickel plating on R-Fe-B sintered magnets.
- the method of the present invention for removing rare earth impurities from an electronickel plating solution includes adding a rare earth compound to an electronickel plating solution containing rare earth impurities, holding the mixture at a temperature of 60 ° C. or higher for a certain period of time, and then depositing precipitates. And depositing and / or filtering the rare earth compound to remove the precipitate and the rare earth compound from the electro nickel plating solution.
- rare earth impurities are, for example, R-Fe-B sintered magnets (where R is at least one kind of rare earth elements including Y and must contain Nd) when electroplating. It is an R component that dissolves in the plating solution, and most of it exists in an ionic state in the plating solution.
- the present invention makes it possible to form a solid precipitate that can collect rare earth impurities in an ionic state by a filter, and to separate and remove the precipitate from the plating solution by sedimentation or filtration.
- the present invention is not limited to the removal of the R component dissolved in the plating solution when electroplating the above R-Fe-B sintered magnet, but also exists in an ionic state in the plating solution. It can be applied in the removal of rare earth impurities.
- the relationship between the amount of rare earth impurities (especially Nd impurities) and the occurrence of double plating or peeling of the plating film varies depending on the plating conditions, but when the amount of Nd impurities is about 200 ppm, they are not observed. Therefore, when the rare earth impurity reduction treatment is performed for the purpose of reducing the amount of Nd impurities to 200 ppm or less, the treatment can be performed at the following temperature and time.
- the plating solution It is necessary to heat the plating solution to 60 ° C or higher when removing rare earth impurities. Below 60 ° C, it takes time to remove rare earth impurities, which is not suitable for industrial production.
- the boiling point of the plating solution varies depending on the composition.
- the boiling point of the watt bath is about 102 ° C.
- the heating in the method of the present invention is desirably in the range of 60 ° C. to 100 ° C., more desirably 70 ° C. to 95 ° C., and most desirably 80 ° C. to 90 ° C.
- the treatment time varies depending on the temperature conditions, but is preferably 6 hours or more, more preferably 12 hours or more.
- the upper limit of the time does not need to be set, but is preferably 168 hours or less, more preferably 72 hours or less, and most preferably 24 hours or less from the viewpoint of cost and work efficiency.
- the relationship between the amount of rare earth impurities (especially Nd impurities) and the occurrence of double plating or peeling of the plating film varies depending on the plating conditions, but when the amount of Nd impurities is about 200 ppm, they are not observed. Therefore, the temperature and time may be set as appropriate so that the amount of Nd impurities can be reduced to 200 ppm or less.
- the treatment tank used when carrying out the method for removing rare earth impurities of the present invention needs to use one having high heat resistance according to the above heating range (temperature of the plating solution by heating). Therefore, the higher the temperature, the higher the cost. Implementation in the above temperature range, particularly a desirable temperature range, contributes to the suppression of cost increase as a result.
- the rare earth compound to be added a known one may be used.
- the rare earth compounds neodymium oxide, dysprosium oxide, terbium oxide, praseodymium oxide and the like can be used as the rare earth oxide.
- the rare earth constituting these compounds is preferably neodymium, which is the main component of the R—T—B based sintered magnet. Neodymium oxide can be suitably used.
- a rare earth hydroxide obtained by converting a rare earth oxide into a hydroxide can be used.
- rare earth salts such as rare earth chloride salts and rare earth sulfates can be used as the rare earth compound.
- neodymium hydroxide, neodymium chloride, neodymium sulfate and the like are preferably used, and neodymium chloride and neodymium sulfate may be hydrates.
- the rare earth impurities are precipitated faster by adding the rare earth compound when heating the nickel electroplating solution containing the rare earth impurities, but the rare earth impurities in the electronickel plating solution are deposited. It is presumed that it will play a role like a nucleus when doing so.
- rare earth compound serving as the nucleus examples include rare earth oxides, rare earth hydroxides, rare earth salts, and rare earth sulfates.
- rare earth oxides are relatively easy to obtain and can be suitably used. These compounds may be added as powders, or may be added after stirring in water. Or after diluting in an aqueous solution of acid, it may be added to the plating solution.
- the addition timing of the rare earth compound may be before the heating of the electro nickel plating solution containing the rare earth impurities, may be during the heating and before reaching the set temperature, or after the set temperature is reached.
- the original characteristics of the present invention can be realized by maintaining at 60 ° C. or higher for a certain time in the state where the rare earth compound is added to the electronickel plating solution containing rare earth impurities.
- the compound form of the rare earth compound before addition and the rare earth compound removed together with the impurities may be changed.
- the concentration of the plating solution used in the method for removing rare earth impurities of the present invention is preferably in the range of 1 to 3 times the concentration when plating is performed 1 time. Concentration is preferably by heating. Since the plating solution evaporates water, which is a solvent, by heating, heating and concentration can be performed simultaneously.
- the concentration of the plating solution exceeds 3 times due to heating, the deposition of the plating solution components starts abruptly and is not desirable.
- the concentration is more preferably in the range of 1 to 2 times. Although it can be processed in the range of 2 to 3 times, it must be carefully controlled so that the deposition of the plating solution component does not start when the concentration approaches 3 times.
- the amount of plating solution decreases due to water evaporation.
- water is replenished.
- the concentration of the plating solution is kept constant, for example, when the plating solution is returned from the preliminary tank used for removing the rare earth impurities to the plating tank after removing the rare earth impurities, the concentration can be adjusted in a short time by supplying water. .
- the present invention is suitable for removing rare earth impurities in acidic to neutral nickel plating solutions.
- the present invention can be applied to nickel plating solutions such as watt baths, high chloride baths, chloride baths, sulfamic acid baths, etc., and is most suitable for watt baths.
- the Watt bath may be of a very common bath composition. For example, it can be applied to compositions containing brighteners and pit inhibitors as additives: 200 to 320 g / L nickel sulfate, 40 to 50 g / L nickel chloride, 30 to 45 g / L boric acid. is there.
- the composition of the plating solution is adjusted by a known analysis method (such as titration analysis). For example, in the case of a watt bath, nickel chloride and total nickel are analyzed by titration to obtain nickel sulfate, and boric acid is analyzed by titration.
- a known analysis method such as titration analysis. For example, in the case of a watt bath, nickel chloride and total nickel are analyzed by titration to obtain nickel sulfate, and boric acid is analyzed by titration.
- the composition of the plating solution after removal of rare earth impurities is within the control range, it is not always necessary to add it, but if it is insufficient, an insufficient amount of nickel sulfate, nickel chloride, boric acid is added to the plating solution.
- Add and adjust the composition of the plating solution When adding these chemicals, it is desirable to heat the plating solution to a temperature at which plating is performed. When the temperature is low, dissolution of the added drug is slow or does not dissolve.
- the pH is adjusted with nickel carbonate or sulfuric acid, and a known brightener or pit inhibitor is added to perform plating.
- the plating conditions using the plating solution to which the present invention is applied may be appropriately changed depending on the equipment used, the plating method, the size of the object to be plated, the number of treatments, and the like.
- the plating conditions when the plating bath having the above Watt bath composition is used are preferably pH 3.8 to 4.5, bath temperature 45 ° C. to 55 ° C., and current density 0.1 to 10 A / dm 2 .
- As a plating method there are a rack method and a barrel method, which may be appropriately set depending on the size of the object to be plated and the processing amount.
- the plating tank is made of FRP or PP having high heat resistance, or an iron plate coated with fluororesin, impurities in the electro nickel plating solution can be removed only by the plating tank without preparing a preliminary tank.
- the plating tank is made of vinyl chloride (PVC), and by using a container with a high heat resistance material in the spare tank, the plating tank can perform plating treatment while removing impurities in the spare tank. Efficiency and workability can be improved. In addition, safety
- security can also be improved by using the container of a material with high heat resistance for both a plating tank and a reserve tank.
- the plating tank 1 has an anode plate (not shown), a cathode (not shown), a heater (not shown), and a stirrer (not shown), builds a plating solution, and performs electro nickel plating. be able to.
- the material of the plating tank 1 is preferably vinyl chloride (PVC) or heat-resistant vinyl chloride (PVC) depending on the plating solution used.
- the plating system is composed of the plating layer 1, the valves 2, 5, 6, 7, the pump 3, and the filter 4.
- the pump 3 is operated with the valve 7 closed and the valves 2, 5, 6 open.
- the plating solution in the plating tank 1 can be circulated and the plating solution can be filtered through the filter 4. That is, the plating solution circulates through the path of the plating tank 1, the valve 2, the pump 3, the filter 4, the valve 5, the valve 6, and the plating tank 1, and is filtered by the filter 4 in the path.
- a known filter used in electroplating can be used for the filter, and the filter 4 that is configured integrally with the pump 3 can be used.
- the material of the piping is preferably vinyl chloride (PVC) or heat resistant vinyl chloride (PVC).
- the preliminary tank 8 has a stirring blade 9 connected to a motor (not shown) and a heater 10 connected to a power source (not shown).
- the heater 10 may be a steam heater connected to a steam generator by piping.
- a method using an air diffuser connected to an air pump may be used as a means for stirring the plating solution in the preliminary tank. It may be. Since the preliminary tank 8 treats a high-temperature plating solution containing rare earth impurities, it is desirable to use PP or FRP made of high heat resistance.
- the filtration system is composed of the preliminary tank 8, the valves 11, 14, 15, 16, the pump 12, and the filter 13.
- the filter 13 may be configured integrally with the pump 12.
- the circulation of the plating solution in the preliminary tank and the method of feeding the liquid between the preliminary tank and the plating tank will be described.
- the pump 3 By operating the pump 3 with the valve 6 closed and the valves 2, 5, 7 opened, the plating solution in the plating tank 1 can be sent to the preliminary tank 8 via the filter 4. That is, the plating solution is sent through the route of the plating tank 1, the valve 2, the pump 3, the filter 4, the valve 5, the valve 7, and the reserve tank 8.
- the plating solution in the reserve tank 8 can be circulated and the plating solution can be filtered through the filter 13. That is, the plating solution is a reserve tank 8, a valve 11, and a pump 12. It circulates in the path
- the plating solution in the spare tank 8 can be sent to the plating tank 1 via the filter 13. That is, the plating solution is sent through the path of the preliminary tank 8, the valve 11, the pump 12, the filter 13, the valve 14, the valve 15, and the plating tank 1.
- Rare earth impurities are deposited by adding a rare earth compound to the preliminary tank 8 and performing a heating treatment.
- the precipitated rare earth impurities and the added rare earth compound settle at the bottom of the preliminary tank 8 when the stirring with the stirring blade 9 is stopped.
- the preliminary tank 8 When the plating solution is sent from the preliminary tank 8 to the plating tank 1, after the added rare earth compound and precipitate have settled, the preliminary tank 8, the valve 11, the pump 12, the filter 13, the valve 14, the valve 15, and When the solution is sent through the path of the plating tank 1, clogging of the filter due to the added rare earth compound and precipitate is suppressed, and the filter disposed in the filter 13 can be used for a long time.
- the tip of the pipe connected to the pump 12 from the preliminary tank 8 via the valve 11 (part that absorbs the plating solution) is configured not to contact the bottom of the preliminary tank 8, and the rare earth compound deposited (added) on the bottom and It has a structure that makes it difficult to suck precipitates.
- the solution may be sent without waiting for sedimentation.
- the plating solution in which the rare earth compound and the precipitate are precipitated is sent from the preliminary tank 8 to the plating tank 1, a filter may not be disposed in the filter 13.
- the rare earth compound and the precipitate in the preliminary tank 8 are deposited on the bottom of the preliminary tank 8, and are contained in the plating solution fed from the preliminary tank 8 to the plating tank 1.
- Rare earth compounds and precipitates are very low. Therefore, after sending the solution to plating tank 1, the plating solution is filtered in the plating tank 1 (plating tank 1, valve 2, pump 3, filter 4, valve 5, valve 6, and plating tank 1 path). Rare earth compounds and precipitates remaining (added) in the liquid can be removed by filtration.
- devices having various configurations can be used without being limited to the above devices.
- a configuration in which the piping for circulating the plating solution in the plating tank 1 and the piping for feeding the plating solution in the plating tank 1 to the spare tank 8 are arranged completely independently can be employed.
- a specific configuration will be described with a valve, a pump, a filter, and a pipe connected to the plating tank 1.
- the plating solution is plating tank 1, valve 2, pump 3, filter 4, valve 5, It circulates through the path of the valve 6 and the plating tank 1.
- the plating solution is plated tank 1, valve 2, pump 3, filter 4, valve 5, valve 7, and spare tank 8. It is sent by the route.
- circulation in the plating tank 1 and liquid feeding from the plating tank 1 to the preliminary tank 8 are switched by opening and closing the valves 5, 6 and 7.
- the paths to the valve 2, the pump 3, the filter 4, and the valve 5 are used for both circulation and liquid feeding, and are shared.
- piping is provided in the path that continues to the plating tank 1 through the valve 2, the pump 3, the filter 4, the valve 5, and the valve 6 for circulation (in this case, the valve 5 and the valve 6 are not necessarily required).
- piping is provided in a path that passes through the valve 2 ′, the pump 3 ′, the filter 4 ′, the valve 5 ′, and the valve 7 and continues to the auxiliary tank 8 (in this case, the valve 5 ′ and the valve 7 are not necessarily required).
- FIG. 2 shows a configuration in which another spare tank is added to the configuration of the plating tank and the spare tank described in FIG.
- FIG. 2 is mainly intended to explain the function of the plating tank and the preliminary tank, that is, the function of each tank. Therefore, the heater and the stirring blade arranged individually in each preliminary tank, and the plating tank The arranged electrodes are not shown. Further, only the piping necessary for liquid feeding between the preliminary tanks and between the preliminary tanks and the plating tank is shown, and the valves and the piping necessary for circulation are not shown.
- the addition of the rare earth compound to the electronickel plating solution containing rare earth impurities can be performed in the first preliminary tank 19 and / or the second preliminary tank 21.
- Each spare tank has a heater (and a stirring blade) and can heat the nickel electroplating solution, and can promote precipitation of rare earth impurities by heating.
- the solution may be sent to the second preliminary tank 21 at the same time as being filtered and removed by the vessel (and pump) 20.
- the nickel nickel plating solution in which rare earth impurities are reduced by this method is prepared in the second preliminary tank in advance, and by sending the liquid to the plating tank 17, the interruption time of the plating operation in the plating tank 17 can be shortened. .
- the rare earth compound is added to the second preliminary tank 21 and further heated. Then, the rare earth impurities may be precipitated, and the rare earth impurities may be separated and removed by the filter (and pump) 22.
- the temperature of the electronickel plating solution is at least It is desirable to cool below the processing temperature of the electro nickel plating solution.
- the temperature of the moved electro nickel plating solution is higher than the treatment temperature of the electro nickel plating solution, the electro nickel plating treatment at that temperature may change the characteristics of the plating film.
- a heating device such as a heater is attached to the electric nickel plating tank, so even if the temperature of the moved electro nickel plating solution is below the processing temperature, it can be set to the processing temperature by heating.
- the temperature of the nickel plating solution is equal to or higher than the processing temperature, it is necessary to provide a separate cooling device.
- Providing a cooling device in the plating tank increases the cost and requires time for cooling, which lowers the efficiency of the plating process.
- the plating tank may be deformed by a high temperature plating solution. Cooling of the electro nickel plating solution stops natural heating for precipitation of rare earth impurities and may be natural cooling. When it is desired to cool quickly, a heat exchanger or chiller for cooling may be used.
- Reference Examples 1 to 12 shown below are examples carried out in the process of carrying out Example 1 of the present invention, in which an electric nickel plating solution containing rare earth impurities was heated for a certain period of time and deposited as precipitates. The process of removing rare earth impurities from an electrolytic nickel plating solution by precipitating and / or filtering rare earth impurities is shown.
- Reference example 1 The composition consists of 250 g / L nickel sulfate, 50 g / L nickel chloride, and 45 g / L boric acid.
- the pH 4.5 plating solution is heated to 50 ° C and the R-Fe-B system Electronickel plating was applied to the surface of the sintered magnet.
- R-Fe-B sintered magnets are available in 15-25 mass% Nd, 4-7 mass% Pr, 0-10 mass% Dy, 0.6-1.8 mass% B depending on the required magnetic properties. , 0.07 to 1.2% by mass of Al and the balance of Fe (including 3% by mass or less of Cu and Ga) were used.
- the composition of the magnets used in one batch was the same.
- the composition and amount of each rare earth impurity dissolved in the plating solution vary depending on the combination of magnets used for plating, the treatment method such as barrel plating and rack plating, and the composition of the plating solution.
- Nd impurities, Pr impurities, and Dy impurities in the electro nickel plating solution were analyzed with an ICP emission spectrometer.
- the analysis results of the plating solution after use were Nd: 500 ppm, Pr: 179 ppm, and Dy: 29 ppm.
- the plating solution containing the rare earth impurities was collected in a fixed amount (3 liters) beaker and kept at 90 ° C. with a heater for a fixed time. During heating, the mixture was stirred with a magnetic stirrer (magnet stirrer). During heating, water was replenished so that the concentration of the plating solution was constant.
- the ionic state rare earth impurities dissolved in the electrolytic nickel plating solution became precipitates by heating for a predetermined time, and were separated and removed from the plating solution by filtration with filter paper.
- the rare earth impurities that did not become precipitates even after heating for a predetermined time remained in the plating solution in an ionic state at a rate as shown in the above analysis results.
- the longer the heating time the greater the amount of rare earth impurities separated and removed as precipitates.
- the amount of rare earth impurities in the ionic state in the plating solution decreased. . It has been found that the treatment method of Reference Example 1 reduces the amount of impurities of Pr and Dy at the same time as the amount of impurities of Nd, which is a rare earth element.
- Reference example 2 R-Fe-B sintering with a composition consisting of 250 g / L nickel sulfate, 50 g / L nickel chloride, 45 g / L boric acid, and a pH 4.5 plating solution heated to 50 ° C
- Electronickel plating was applied to the surface of a magnet (using the same composition range as in Reference Example 1). After plating for several days, the Nd impurity in the electronickel plating solution was analyzed and found to be 576 ppm.
- the plating solution after the plating treatment for several days is heated under 6 conditions from 50 ° C to 95 ° C (however, from 50 ° C to 90 ° C, 5 conditions in increments of 10 ° C). Collected and held in a beaker. During heating, the mixture was stirred with a magnetic stirrer (magnet stirrer). During heating, water was replenished so that the concentration of the plating solution was constant, and an amount of plating solution necessary for ICP emission analysis was collected at regular intervals. The collected plating solution was subjected to filtration of precipitates with filter paper, and then the content (concentration) of Nd impurities in the plating solution was analyzed using an ICP emission analyzer. The analysis results from 50 ° C. to 90 ° C. are shown in Table 1 and shown in FIG.
- the Nd impurity concentration became 518 ppm after 168 hours.
- the Nd impurity concentration decreased after 24 hours and became 177 ppm after 216 hours.
- the Nd impurity concentration tended to always be lower after 24 hours compared to 60 ° C.
- the liquid temperature was 80 ° C.
- the Nd impurity concentration decreased immediately after heating and reached 125 ppm after 96 hours.
- the liquid temperature was 90 ° C.
- the Nd impurity concentration was 134 ppm after 24 hours, 84 ppm after 48 hours, and 59 ppm after 96 hours.
- the liquid temperature was 95 ° C., analysis was conducted after 24 hours and 96 hours, and the Nd impurity concentration was almost the same as when heated at 90 ° C.
- the heating temperature is about 200ppm in one week (168 hours) at 60 °C. It can be seen that almost the same effect can be obtained in 5 days (120 hours) at 70 ° C, 3 days (72 hours) at 80 ° C, and 24 hours (1 day) at 90 ° C and 95 ° C. Therefore, for example, when 1 week is the unit period of production, the plating solution which is kept at 60 ° C. for 1 week (168 hours) and then filtered can be used for the plating process, and at 70 ° C. for 5 days (120 days). The amount of impurities that can be plated in time) can be reduced.
- impurities in the plating solution can be reduced in a shorter time. That is, the heating temperature and the holding time can be selected according to the presence or absence of equipment capable of heating the plating solution to the above temperature and the production schedule.
- Reference example 3 The plating solution heated in Reference Example 1 and Reference Example 2 was filtered with a filter paper, and the precipitate deposited from the plating solution was collected. The precipitate was dried in a thermostatic bath. The property was powder (solid). When this precipitate was analyzed with an energy dispersive X-ray analyzer (EDX), Nd: 32.532, Pr: 11.967, Dy: 1.581, Al: 0.402, Ni: 7.986, C: 0.319, and O: 45.213 (mass) %). From this result, it was confirmed that the rare earth impurities in the plating solution were precipitated as powder (solid) by the heating treatment.
- EDX energy dispersive X-ray analyzer
- Reference example 4 1 g / L of the precipitate collected in Reference Example 3 was added to the plating solution obtained in Reference Example 2 after plating for several days (containing rare earth impurities: Nd impurity concentration is 576 ppm).
- the plating solution to which the precipitate was added was divided into 3 liter beakers, heated to 60 ° C. and 70 ° C., and held in the same manner as in Reference Example 1 with stirring.
- the plating solution to which the precipitate was not added was also divided into 3 liter beakers, heated to 60 ° C. and 70 ° C., and similarly held with stirring. Whether or not the precipitate was added, water was replenished so that the concentration of the plating solution was constant during heating.
- Reference Example 5 R-Fe-B sintering with a composition consisting of 250 g / L nickel sulfate, 50 g / L nickel chloride, 45 g / L boric acid, and a pH 4.5 plating solution heated to 50 ° C Electro-nickel plating was applied to the surface of a magnet (used in combination with several types having the same composition range as in Reference Example 1). After plating for several days, Nd impurities in the electronickel plating solution were analyzed with an ICP emission spectrometer, and found to be 544 ppm.
- the amount of plating solution necessary for ICP emission analysis was collected at regular intervals, and the Nd impurity concentration was measured with an ICP emission analyzer in the same manner as in Reference Example 1. The analysis results are shown in Table 3 and shown in FIG.
- Reference Example 6 Prepare the plating solution after plating for several days obtained in Reference Example 5 (containing rare earth impurities: Nd impurity is 544 ppm) Divided into beakers. The same precipitates used in Reference Example 3 were added to 4 beakers at 1 g / L. No precipitate was added to the remaining one. These plating solutions were heated to 90 ° C. and held in the same manner as in Reference Example 1 with stirring. Water was not added until the liquid volume was halved (approximately half after 24 hours of warming), and water was added from the time when the liquid volume was halved to maintain the plating solution concentration at twice the initial level. While maintaining, stirring was performed in the same manner as in Reference Example 1.
- the Nd impurity concentration of these plating solutions was measured with an ICP emission analyzer. When no precipitate was added, the Nd impurity concentration was 52 ppm after 24 hours of heating.
- the four plating solutions to which the precipitates were added had Nd impurity concentrations of 32 ppm, 56 ppm, 52 ppm, and 61 ppm after 24 hours of heating. That is, it was found that when the concentration was doubled, the same impurity reduction effect was obtained with or without the precipitate.
- the Nd impurity concentration was measured by diluting the collected plating solution twice.
- Reference Example 7 Prepare the plating solution (containing rare earth impurities: Nd impurity concentration: 576 ppm) after several days of plating treatment obtained in Reference Example 2, and add 3 liters of plating solution as in Reference Example 2. It was put in a beaker and kept warm at 90 ° C. At this time, the plating solution was not stirred. Water was added to maintain the amount of the plating solution so that the concentration of the plating solution did not change. The plating solution was collected at regular intervals, and the impurity content was measured with an ICP emission analyzer in the same manner as in Reference Example 1.
- the Nd impurity concentration was 137 ppm after 24 hours, 73 ppm after 72 hours, and 63 ppm after 96 hours, and was reduced in the same manner as in Reference Example 2.
- the amount of the plating solution was about 3 liters, the influence of stirring was not so great.
- the amount of plating solution in a plating bath that is usually used is several tens to 100 times or more. For example, when removing rare earth impurities from several hundred liters or more of plating solution, make the solution temperature uniform. Therefore, it is desirable to stir.
- Reference Example 8 A plating solution which had been plated was prepared in the same manner as the plating solution obtained after performing the plating treatment for several days obtained in Reference Example 1.
- the Nd impurity amount, Fe impurity amount, and Cu impurity amount in the plating solution after plating were analyzed with an ICP emission spectrometer. As a result, Nd: 500 ppm, Fe: 19 ppm, and Cu: 3 ppm.
- This plating solution was heated under the same conditions (90 ° C.) as in Reference Example 1, and after 24 hours and 96 hours, the plating solution was collected in an amount necessary for ICP emission analysis.
- the amount of impurities and the amount of Cu impurities were measured with an ICP emission spectrometer.
- Nd 100 ppm, Fe: 3 ppm, and Cu: below detection limit after 24 hours
- Nd 50 ppm, Fe: 1 ppm, and Cu: below detection limit after 96 hours Met. It was confirmed that not only rare earth impurities but also Fe impurities and Cu impurities can be reduced by heating treatment of the treated plating solution.
- Reference Example 9 R-Fe-B sintering with a composition consisting of 250 g / L nickel sulfate, 50 g / L nickel chloride, 45 g / L boric acid, and a pH 4.5 plating solution heated to 50 ° C Electro-nickel plating was applied to the surface of a magnet (the same composition range as in Reference Example 1 was used, but the composition of the magnet used in one batch was the same). After plating for several days, the Nd impurity in the electronickel plating solution was analyzed and found to be 581 ppm. .
- the first heating treatment 90 ° C.
- a significant decrease (precipitation) of Nd impurities could be confirmed from about 3 hours after heating.
- the second heating treatment 90 ° C.
- the rate of decrease of Nd impurities was further increased, and the precipitation of impurities began even after 1 hour.
- the second heating treatment performed while leaving the precipitate was the same as the case where the precipitate of Reference Example 4 was added.
- the treatment with the beaker in which the precipitate remains is performed when the removal treatment of the rare earth impurities in the electronickel plating solution is repeatedly performed a plurality of times, and the precipitate obtained by the removal treatment performed previously is added. Also, it corresponds to a case where a new electro nickel plating solution is added in a state in which the deposited precipitate remains, and the rare earth impurities are removed again after the plating treatment.
- Reference Example 10 (i) First heating treatment Prepare a plating solution (581 ppm of Nd impurities) after performing the plating treatment obtained in Reference Example 9 for several days, put it in a 3 liter beaker, and Warmed up. Water was not replenished until the concentration of the plating solution was doubled by heating (the amount of the solution was halved). After 1, 3, 6, 12 and 24 hours, the content (concentration) of Nd impurities in the plating solution was analyzed with an ICP emission analyzer in the same manner as in Reference Example 1. In the analysis, the plating solution concentration was diluted (twice) so as to be the same as before the heating. After 24 hours, the stirrer was stopped, the precipitate was allowed to settle, and the plating solution in the beaker was extracted. When extracting, the deposit was left at the bottom of the beaker.
- precipitation by heating concentration has already started after 1 hour of heating, and by removing the precipitate by filtration or sedimentation, it can be reduced to 200 ppm or less after 6 hours. is there. That is, the Nd impurity can be reduced to 200 ppm or less in a short time by heating and concentration, and plating can be continued.
- treatment amount is reduced to a new plating solution or 200 ppm or less. Although it is shorter than the case, it can be used for a certain period.
- the previously treated precipitate In addition to heating concentration, if the previously treated precipitate remains, it can be reduced from 581 ppm to 435 ⁇ ⁇ ppm even in the treatment for about 1 hour, and the time that can be used for the plating treatment is compared to the treatment for 3 hours. Although shorter, it can be used for a certain period of time.
- the plating apparatus shown in Fig. 1 has a composition consisting of 250 g / L nickel sulfate, 45 g / L nickel chloride and 45 g / L boric acid, and the pH 4.5 plating solution is heated to 50 ° C. Electro-nickel plating was performed for several days on the surface of an R-Fe-B sintered magnet (using a combination of several types of magnets having different compositions within the same composition range as in Reference Example 1) in a barrel manner.
- composition of the plating solution in which the rare earth impurities accumulated after the plating treatment has a composition consisting of 250 g / L nickel sulfate, 45 g / L nickel chloride, and 45 g / L boric acid.
- concentration of Nd impurity was 600 ppm.
- the total amount of 500 ⁇ L of this electric nickel plating solution was fed from the plating tank 1 to the preliminary tank 8.
- the liquid temperature of the fed plating solution was kept at 90 ° C., and stirring was performed using the stirring blade 9.
- the stirring blade 9 is stopped, the heater 10 is turned off, the valve 16 is closed, the pump 12 is operated with the valves 11, 14, and 15 opened, and the plating solution is passed through the filter 13 to the plating tank 1. Returned to.
- the Nd impurity concentration of the plating solution returned to the plating tank 1 was measured and found to be 50 ppm.
- the valve 16 was closed and the valves 11, 14, and 15 were opened, and the plating solution was returned to the plating tank 1 while filtering the plating solution. Then, the pump 12 is operated in a state in which 16 is opened, and the plating solution is circulated in the order from the preliminary tank 8 to the filter 13 and the preliminary tank 8 to filter the plating solution, and the filter 13 is replaced with a new one.
- the plating solution may be returned from the preliminary tank 8 to the plating tank 1 with the valve closed and the valves 11, 14 and 15 opened.
- Example 1 R-Fe-B sintering with a composition consisting of 250 g / L nickel sulfate, 50 g / L nickel chloride, 45 g / L boric acid, and a pH 4.5 plating solution heated to 50 ° C
- Electronickel plating was applied to the surface of the magnet (with the same composition range as Reference Example 1). After plating for several days, the Nd impurity in the electronickel plating solution was analyzed and found to be 320 ppm.
- the plating solution was collected in a 3 liter beaker and heated at 60 ° C. An amount of plating solution required for the ICP emission spectrometer was collected every 48 hours, 96 hours, and 144 hours. After collecting the plating solution after 144 hours, 1 g / L of neodymium oxide (Nd 2 O 3 ) was added, and the plating solution was collected 168 hours after the start of heating with the solution temperature maintained at 60 ° C. Finally, the heating treatment was performed up to 240 hours. During heating, stirring was performed with a magnetic stirrer (magnet stirrer), and water was supplied so that the concentration of the plating solution was constant. The plating solution after the heating treatment was filtered with a filter paper, and then the content (concentration) of Nd impurities in the plating solution was analyzed using an ICP emission spectrometer. The results are shown in Table 6.
- Example 1 when heating is performed in the presence of neodymium oxide (Nd 2 O 3 ) in the plating solution containing rare earth impurities, the time during which the rare earth impurities become precipitates increases. I can confirm. That is, after adding neodymium oxide, it was confirmed that a significant impurity concentration reduction effect was exhibited in 24 hours.
- neodymium oxide Nd 2 O 3
- Example 1 the amount of decrease in Nd impurities during the period until the rare earth compound (neodymium oxide) was added (from the start of heating to 144 hours) was higher than that in Reference Example 2 (heating at 60 ° C.). The reason for this is considered to be that the amount of rare earth impurities contained in the plating solution after the plating treatment was small.
- neodymium oxide was added after heating the electrolytic nickel plating solution containing rare earth impurities to 60 ° C. and holding for a certain period of time, but neodymium oxide was added before or during heating. It was confirmed that the same effect was obtained.
- the present invention has industrial applicability because it dissolves in a plating solution when plating a rare earth magnet and can efficiently remove rare earth impurities in the electronickel plating solution that cause so-called plating defects. .
Abstract
Description
250 g/Lの硫酸ニッケル、50 g/Lの塩化ニッケル、及び45 g/Lのほう酸からなる組成を有し、pH4.5のめっき液を50℃に加温し、R-Fe-B系焼結磁石の表面に電気ニッケルめっきを施した。R-Fe-B系焼結磁石は、必要な磁気特性に応じて、15~25質量%のNd、4~7質量%のPr、0~10質量%のDy、0.6~1.8質量%のB、0.07~1.2質量%のAl、及び残部Fe(3質量%以下のCu及びGaを含む)からなる組成範囲に調整した数種類のものを用いた。ただし、一回のバッチで用いる磁石の組成は同じものとした。なおメッキ液に溶解する希土類不純物のそれぞれの組成や量はめっきに供した磁石の組み合わせ、バレルめっきやラックめっきといった処理方法、メッキ液の組成によって異なる。
250 g/Lの硫酸ニッケル、50 g/Lの塩化ニッケル、45 g/Lのほう酸からなる組成を有し、pH4.5のめっき液を50℃に加温しR-Fe-B系焼結磁石(参考例1と同じ組成範囲のものを用いた)の表面に電気ニッケルめっきを施した。数日間めっき処理を行った後、電気ニッケルめっき液中のNd不純物を分析したところ576 ppmであった。
参考例1及び参考例2で加温処理しためっき液を、濾紙で濾過し、めっき液から析出した析出物を回収した。上記析出物を恒温槽で乾燥した。性状は紛体(固体)であった。この析出物をエネルギー分散型X線分析装置(EDX)にて分析したところ、Nd:32.532、Pr:11.967、Dy:1.581、Al:0.402、Ni:7.986、C:0.319、及びO:45.213(質量%)の組成を有していた。この結果から、加温処置により、めっき液中の希土類不純物が紛体(固体)として析出していることを確認した。
参考例2で得られた数日間めっき処理を行った後のめっき液(希土類不純物を含んだもの:Nd不純物濃度は576 ppm)に参考例3で回収した析出物を1g/L添加した。析出物を添加しためっき液を3リットルずつビーカーに分け60℃及び70℃に加温し、参考例1と同様に攪拌しながら保持した。一方で、上記析出物を添加しないめっき液についても3リットルずつビーカーに分け60℃及び70℃に加温し、同様に攪拌しながら保持した。上記析出物を添加した場合も、添加しない場合も、加温中はめっき液の濃度が一定になるように水を補給した。
結果を表2に示すとともに図4に示した。これらの結果から、液温が60℃及び70℃ともに、上記析出物を添加しためっき液の方が添加しないめっき液よりも、同じ時間でNd不純物が大幅に低下していた。
250 g/Lの硫酸ニッケル、50 g/Lの塩化ニッケル、45 g/Lのほう酸からなる組成を有し、pH4.5のめっき液を50℃に加温しR-Fe-B系焼結磁石(参考例1と同じ組成範囲のものを数種類組み合わせて用いた)の表面に電気ニッケルめっきを施した。数日間めっき処理したのち、電気ニッケルめっき液中のNd不純物をICP発光分析装置にて分析したところ544 ppmであった。
参考例5で得られた数日間めっき処理を行った後のめっき液(希土類不純物を含んだもの:Nd不純物が544 ppmのもの)を準備し、このめっき処理済みめっき液を3リットルずつ5つのビーカーに分けた。4つのビーカーには参考例3で用いたものと同じ析出物を1 g/L添加した。残りの1つには析出物を添加しなかった。これらのめっき液を90℃に加温し、参考例1と同様に攪拌しながら保持した。液量が半分になるまで(加温24時間経過後でほぼ半分)は水を添加せず、半分になった時点から水を添加し、めっき液の濃度を初期の2倍で維持した。維持している間も参考例1と同様に攪拌した。
参考例2で得られた数日間めっき処理を行った後のめっき液(希土類不純物を含んだもの:Nd不純物濃度576 ppmのもの)を準備し、参考例2と同じようにめっき液を3リットルビーカーに入れ90℃に加温保持した、この際、めっき液の攪拌は行わなかった。めっき液の濃度が変化しないように水を添加してめっき液の液量を維持した。一定時間ごとにめっき液を採取し、参考例1と同様にして不純物含有量をICP発光分析装置にて測定した。
参考例1で得られた数日間めっき処理を行った後のめっき液と同様にしてめっき処理済みのめっき液を準備した。このめっき処理済みめっき液中のNd不純物量、Fe不純物量、及びCu不純物量をICP発光分析装置にて分析した。その結果、Nd:500 ppm、Fe:19 ppm、及びCu:3 ppmであった。
250 g/Lの硫酸ニッケル、50 g/Lの塩化ニッケル、45 g/Lのほう酸からなる組成を有し、pH4.5のめっき液を50℃に加温しR-Fe-B系焼結磁石(参考例1と同じ組成範囲のものを用いた、ただし1回のバッチで用いる磁石の組成は同じものとした)の表面に電気ニッケルめっきを施した。数日間めっき処理を行った後、電気ニッケルめっき液中のNd不純物を分析したところ581 ppmであった。。
上記めっき液を3リットルのビーカーに採取し、90℃で加温した。加温中は磁石式の攪拌機(マグネットスターラ)にて攪拌した。加温中はめっき液の濃度が一定になるように水を補給しながら、1、3、6、12及び24時間経過後に、参考例1と同様に、めっき液中のNd不純物の含有量(濃度)をICP発光分析装置にて分析した。24時間経過の後、攪拌機を停止し、析出物を沈降させ、ビーカー中のめっき液を抜き取った。抜き取る際には析出物がビーカー底部に残るようにした。
前記析出物が残っているビーカーに、本参考例にて準備しためっき処理後の電気ニッケルめっき液(581 ppmのNd不純物を含む)を入れ、90℃で加温した。加温中は磁石式の攪拌機(マグネットスターラ)にて攪拌した。加温中はめっき液の濃度が一定になるように水を補給しながら、1、3、6、12及び24時間経過後に、参考例1と同じようにめっき液中のNd不純物濃度をICP発光分析装置にて測定した。Nd不純物の分析結果を、前記1回目の加温処理(析出物を残す前)の結果と併せて表4及び図6に示す。
(i)1回目の加温処理
参考例9で得られた数日間めっき処理を行った後のめっき液(Nd不純物で581 ppmのもの)を準備し、3リットルのビーカーに入れ、90℃で加温した。加温によりめっき液の濃度が2倍(液量が半分)になるまで水を補給せず、液量が半分になった時点で液量を維持するように水を補給した。1、3、6、12及び24時間経過後で、参考例1と同様に、そのめっき液中のNd不純物の含有量(濃度)をICP発光分析装置にて分析した。なお分析に際してはめっき液濃度を加温前と同じになるように希釈(2倍)した。24時間経過の後、攪拌機を停止し、析出物を沈降させ、ビーカー中のめっき液を抜き取った。抜き取る際には析出物がビーカー底部に残るようにした。
前記析出物が残っているビーカーに、参考例9と同じめっき処理後の電気ニッケルめっき液(581 ppmのNd不純物を含む)を入れ、90℃で加温した。加温によりめっき液の濃度が2倍(液量が半分)になるまで水を添加せず、液量が半分になった時点で液量を維持するように水を補給した。1、3、6、12及び24時間経過後に、参考例1と同様にめっき液中のNd不純物濃度をICP発光分析装置にて分析した。なお分析に際してはめっき液濃度を加温前と同じになるように希釈(2倍)した。Nd不純物の分析結果を、前記1回目の加温処理(析出物を残す前)の結果と併せて表5及び図7に示した。
図1に示すめっき装置で、250 g/Lの硫酸ニッケル、45 g/Lの塩化ニッケル、45 g/Lのほう酸からなる組成を有し、pH4.5のめっき液を50℃に加温しR-Fe-B系焼結磁石(参考例1と同じ組成範囲で組成の異なる磁石を数種類組み合わせて用いた)の表面に、バレル方式で数日間電気ニッケルめっきを行った。めっき処理後の希土類不純物が蓄積しためっき液の組成を分析したところ、250 g/Lの硫酸ニッケル、45 g/Lの塩化ニッケル、及び45 g/Lのほう酸からなる組成を有しており、Nd不純物の濃度は600 ppmであった。
参考例11の方法で、予備槽8で希土類不純物を低減させた後、めっき槽1に戻しためっき液について組成分析を行った。硫酸ニッケル、塩化ニッケル及びほう酸の組成はほとんど変化しておらず、金属ニッケル分が0.2%低下しているのみであった。
250 g/Lの硫酸ニッケル、50 g/Lの塩化ニッケル、45 g/Lのほう酸からなる組成を有し、pH4.5のめっき液を50℃に加温しR-Fe-B系焼結磁石(参考例1と同じ組成範囲のもの)の表面に電気ニッケルめっきを施した。数日間めっき処理を行った後、電気ニッケルめっき液中のNd不純物を分析したところ320 ppmであった。
Claims (5)
- 希土類不純物を含む電気ニッケルめっき液へ希土類化合物を添加し60℃以上に加温した状態で一定時間保持した後、前記加温により析出した析出物を、添加した希土類化合物とともに沈降及び/又は濾過により、前記電気ニッケルめっき液から除去することを特徴とする電気ニッケルめっき液中の希土類不純物の除去方法。
- 請求項1に記載の希土類不純物の除去方法において、前記希土類化合物は、希土類酸化物であることを特徴とする希土類不純物の除去方法。
- 請求項1又は2に記載の希土類不純物の除去方法において、前記希土類化合物を構成する希土類元素はネオジムであることを特徴とする希土類不純物の除去方法。
- 請求項1~3のいずれかに記載の希土類不純物の除去方法において、前記電気ニッケルめっき液の加温に際し、電気ニッケルめっき液を攪拌することを特徴とする電気ニッケルめっき液中の希土類不純物の除去方法。
- 請求項4に記載の希土類不純物の除去方法において、前記攪拌が、空気、攪拌羽根の回転、又はポンプによる液の循環による攪拌であることを特徴とする電気ニッケルめっき液中の希土類不純物の除去方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201480017713.7A CN105051264B (zh) | 2013-03-25 | 2014-03-17 | 镍电镀液中的稀土类杂质的除去方法 |
US14/771,327 US9873953B2 (en) | 2013-03-25 | 2014-03-17 | Method for removing rare earth impurities from nickel-electroplating solution |
JP2015508316A JP6319297B2 (ja) | 2013-03-25 | 2014-03-17 | 電気ニッケルめっき液中の希土類不純物の除去方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-061648 | 2013-03-25 | ||
JP2013061648 | 2013-03-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014156761A1 true WO2014156761A1 (ja) | 2014-10-02 |
Family
ID=51623742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/057107 WO2014156761A1 (ja) | 2013-03-25 | 2014-03-17 | 電気ニッケルめっき液中の希土類不純物の除去方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US9873953B2 (ja) |
JP (1) | JP6319297B2 (ja) |
CN (1) | CN105051264B (ja) |
WO (1) | WO2014156761A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101810373B1 (ko) | 2017-07-27 | 2018-01-18 | 동아플레이팅 주식회사 | 초음파 도금장치 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103842561B (zh) | 2011-09-28 | 2016-03-30 | 日立金属株式会社 | 镍电镀液中的稀土杂质的除去方法 |
CN105051263B (zh) | 2013-03-25 | 2018-05-29 | 日立金属株式会社 | 镍电镀液中的稀土类杂质的除去方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61533A (ja) * | 1984-06-13 | 1986-01-06 | Nippon Pureeteingu Kk | サマリウムの回収方法 |
JPH02209500A (ja) * | 1989-02-08 | 1990-08-20 | Sumitomo Special Metals Co Ltd | NiまたはNi合金めっき廃液の再生方法 |
JP2002194600A (ja) * | 2000-12-27 | 2002-07-10 | Tdk Corp | アゾジスルホン酸の除去方法、めっき膜の形成方法および積層セラミック電子部品の製造方法 |
JP2006077271A (ja) * | 2004-09-07 | 2006-03-23 | Tdk Corp | めっき方法、めっき装置 |
WO2013047340A1 (ja) * | 2011-09-28 | 2013-04-04 | 日立金属株式会社 | 電気ニッケルめっき液中の希土類不純物の除去方法 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3653813A (en) | 1970-06-24 | 1972-04-04 | Sylvania Electric Prod | Process for preparing rare earth normal tungstates |
US5037463A (en) | 1990-04-20 | 1991-08-06 | Chicago Bridge & Iron Technical Services Company | Freeze concentration and precipitate removal system |
JPH0762600A (ja) | 1993-07-22 | 1995-03-07 | Shin Etsu Chem Co Ltd | めっき浴の不純物金属イオンの連続除去方法およびその装置 |
JP3119545B2 (ja) * | 1993-07-22 | 2000-12-25 | 信越化学工業株式会社 | Nd−Fe−B系永久磁石表面処理用の電気めっき浴中の不純物金属イオンの除去方法およびNd−Fe−B系永久磁石表面処理用の電気めっき浴の再生方法 |
WO2003030227A2 (en) * | 2001-10-02 | 2003-04-10 | Quantum Dot Corporation | Method of semiconductor nanoparticle synthesis |
US6682644B2 (en) | 2002-05-31 | 2004-01-27 | Midamerican Energy Holdings Company | Process for producing electrolytic manganese dioxide from geothermal brines |
KR20070086900A (ko) * | 2002-09-05 | 2007-08-27 | 닛코킨조쿠 가부시키가이샤 | 고순도 황산동 및 그 제조방법 |
JP4915175B2 (ja) | 2006-08-21 | 2012-04-11 | Jfeスチール株式会社 | めっき液再生装置およびめっき液再生方法 |
US20090078577A1 (en) | 2006-08-21 | 2009-03-26 | Kentaro Suzuki | Plating Solution Recovery Apparatus and Plating Solution Recovery Method |
JP4915174B2 (ja) * | 2006-08-21 | 2012-04-11 | Jfeスチール株式会社 | めっき液再生装置およびめっき液再生方法 |
EP2294232A4 (en) | 2008-06-25 | 2013-12-25 | Bhp Billiton Ssm Dev Pty Ltd | iron precipitation |
CA2785411C (en) | 2009-12-25 | 2018-06-19 | Anan Kasei Co., Ltd. | Complex oxide, method for producing same, and exhaust gas purifying catalyst |
JP5835001B2 (ja) * | 2012-02-27 | 2015-12-24 | 日立金属株式会社 | 電気ニッケルめっき液中の希土類不純物の除去方法 |
CN105051263B (zh) | 2013-03-25 | 2018-05-29 | 日立金属株式会社 | 镍电镀液中的稀土类杂质的除去方法 |
-
2014
- 2014-03-17 US US14/771,327 patent/US9873953B2/en active Active
- 2014-03-17 JP JP2015508316A patent/JP6319297B2/ja active Active
- 2014-03-17 WO PCT/JP2014/057107 patent/WO2014156761A1/ja active Application Filing
- 2014-03-17 CN CN201480017713.7A patent/CN105051264B/zh active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61533A (ja) * | 1984-06-13 | 1986-01-06 | Nippon Pureeteingu Kk | サマリウムの回収方法 |
JPH02209500A (ja) * | 1989-02-08 | 1990-08-20 | Sumitomo Special Metals Co Ltd | NiまたはNi合金めっき廃液の再生方法 |
JP2002194600A (ja) * | 2000-12-27 | 2002-07-10 | Tdk Corp | アゾジスルホン酸の除去方法、めっき膜の形成方法および積層セラミック電子部品の製造方法 |
JP2006077271A (ja) * | 2004-09-07 | 2006-03-23 | Tdk Corp | めっき方法、めっき装置 |
WO2013047340A1 (ja) * | 2011-09-28 | 2013-04-04 | 日立金属株式会社 | 電気ニッケルめっき液中の希土類不純物の除去方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101810373B1 (ko) | 2017-07-27 | 2018-01-18 | 동아플레이팅 주식회사 | 초음파 도금장치 |
Also Published As
Publication number | Publication date |
---|---|
CN105051264B (zh) | 2018-05-29 |
CN105051264A (zh) | 2015-11-11 |
US9873953B2 (en) | 2018-01-23 |
JPWO2014156761A1 (ja) | 2017-02-16 |
JP6319297B2 (ja) | 2018-05-09 |
US20160002814A1 (en) | 2016-01-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5692400B2 (ja) | 電気ニッケルめっき液中の希土類不純物の除去方法 | |
JP2008506035A (ja) | クロム鍍金方法 | |
WO2013080326A1 (ja) | めっき液の再生方法 | |
JP5835001B2 (ja) | 電気ニッケルめっき液中の希土類不純物の除去方法 | |
JP6319297B2 (ja) | 電気ニッケルめっき液中の希土類不純物の除去方法 | |
TWI260353B (en) | Copper electroplating method and pure copper anode for copper electroplating | |
JP2021523298A (ja) | 銅電解精製の改善 | |
US11053604B2 (en) | System for treating solution for use in electroplating application and method for treating solution for use in electroplating application | |
JP6281565B2 (ja) | 電気ニッケルめっき液中の希土類不純物の除去方法 | |
JP2012140650A (ja) | めっき液中から不純物を除去する方法 | |
JP6119353B2 (ja) | 電気ニッケルめっき装置 | |
WO2009044266A2 (en) | System and method of plating metal alloys by using galvanic technology | |
CN103966442A (zh) | 一种废杂铜电积制备高纯铜的方法 | |
KR20220118443A (ko) | 기판 상에 아연-니켈 합금을 성막하는 방법 및 시스템 | |
JPH0734300A (ja) | めっき浴の不純物金属イオンの除去方法 | |
KR100934729B1 (ko) | 무전해 주석도금액 불순물 제거장치 및 방법 | |
JPH0762600A (ja) | めっき浴の不純物金属イオンの連続除去方法およびその装置 | |
KR20150008084A (ko) | 아연계 도금 금속 부재 표면의 질산 활성 처리 용액의 재생 방법 및 그것을 이용한 재생 처리 장치 | |
JP2013253307A (ja) | 金属粒子の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201480017713.7 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14773476 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2015508316 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14771327 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 14773476 Country of ref document: EP Kind code of ref document: A1 |