JPS62280387A - Production of high purity metallic cobalt - Google Patents
Production of high purity metallic cobaltInfo
- Publication number
- JPS62280387A JPS62280387A JP12521786A JP12521786A JPS62280387A JP S62280387 A JPS62280387 A JP S62280387A JP 12521786 A JP12521786 A JP 12521786A JP 12521786 A JP12521786 A JP 12521786A JP S62280387 A JPS62280387 A JP S62280387A
- Authority
- JP
- Japan
- Prior art keywords
- soln
- cobalt
- electrolytic
- plates
- high purity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010941 cobalt Substances 0.000 title claims description 26
- 229910017052 cobalt Inorganic materials 0.000 title claims description 26
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 16
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 238000005363 electrowinning Methods 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract description 4
- 239000004327 boric acid Substances 0.000 abstract description 4
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- 239000002932 luster Substances 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 238000005868 electrolysis reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 229940044175 cobalt sulfate Drugs 0.000 description 2
- 229910000361 cobalt sulfate Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
産業上の利用分野
本発明は、金属コバルトを電解採取及び電解精製する方
法に関する。Detailed Description of the Invention 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a method for electrowinning and electrolytic refining of metallic cobalt.
従来の技術
］バルトは主にコバルト基合金として薄膜材料や永久磁
石に用いられており、近年高性能化の要求により、より
高純度のコバルトが求められている。[Prior Art] Balt is mainly used as a cobalt-based alloy in thin film materials and permanent magnets, and in recent years, higher purity cobalt has been required due to demands for higher performance.
従来、金属コバルトを電解採取及び電解Ｍ製する際には
、一般に陰極板としてステンレスやチタンが用いられて
きた。この方法で電解採取や電解精製して得られた金属
コバルトは、電解中に亀裂や剥離が生じたり、或いはそ
り返りが生じるので、電解液に硫酸アンモニウムや硼酸
等を加えてＰＨ副調整行ってきた。又、だの添加剤を加
えて析出状態を改善したが、依然として、コバルトがス
テンレス、チタン等の陰極板に馴染まず、亀裂や剥離を
抑えるにいたらず、４８時間程度の電解しかできない。Conventionally, stainless steel or titanium has been generally used as the cathode plate when cobalt metal is electrolytically won and produced. Metallic cobalt obtained by electrowinning or electrorefining using this method tends to crack, peel, or warp during electrolysis, so ammonium sulfate, boric acid, etc. are added to the electrolyte to sub-adjust the pH. . In addition, although the precipitation state was improved by adding a cobalt additive, cobalt still does not fit into the cathode plate made of stainless steel, titanium, etc., and it is not possible to suppress cracking or peeling, and electrolysis can only be carried out for about 48 hours.
そのため、析出した薄板状の金属コノ＼ルトを種板とし
て使用し、この種板に金属コバルトを析出させる２段階
の工程によって電解を行わざるをえないので生産性も悪
かった。Therefore, the electrolysis had to be carried out in a two-step process in which the deposited thin plate metal cobalt was used as a seed plate and metal cobalt was deposited on this seed plate, resulting in poor productivity.
本発明はこれらの欠点をを解消することを目的とした高
純度金属コバルトの製造法を提供することにある。The object of the present invention is to provide a method for producing high-purity metal cobalt, which aims to eliminate these drawbacks.
問題点を解決するための手段
本発明による高純度金属コバルトの製造法は、陰極にニ
ッケルを用いることを特徴とし、これにより、電解析出
状態を改善し、かつ従来の種板製造工程をも排除でき、
相当に長い時間連続電解採取及び電解精製を行うことが
できるものである。Means for Solving the Problems The method for producing high-purity metal cobalt according to the present invention is characterized by the use of nickel for the cathode, which improves the electrolytic deposition state and also eliminates the conventional seed plate production process. can be eliminated,
It is capable of performing continuous electrowinning and electrolytic refining for a considerably long period of time.
従来の方法において、陰極板がステンレスの場合には、
水素過電圧が小さいので、水素内抱による内部歪が大き
い他、ステンレス表面の不動態酸化皮膜が金属密着性を
低下させるため、剥離を起し易い。又、陰極板がチタン
の場合においても、水素過電圧が小さいので、水素との
共析出により薄片状のコバルトしか得られない。本発明
による方法では、ニッケルの性状がコバルトと類似して
いるために、ニッケルを陰極板に用いた場合、コバルト
の密着性が良好となる他、水素過電圧がほぼ一致するた
め陰極表面側と成長方向側で内抱される水素の濃度はほ
ぼ一定となる。従って、内部歪を極小に抑えることがで
きるので、長時間の電解が可能であり、高純度のコバル
トが効率良く辱られる。In the conventional method, when the cathode plate is made of stainless steel,
Since the hydrogen overvoltage is small, internal strain due to hydrogen inclusion is large, and the passive oxide film on the stainless steel surface reduces metal adhesion, making it easy to peel off. Further, even when the cathode plate is made of titanium, since the hydrogen overvoltage is small, only flaky cobalt can be obtained by co-precipitation with hydrogen. In the method of the present invention, since the properties of nickel are similar to those of cobalt, when nickel is used for the cathode plate, the adhesion of cobalt is good, and the hydrogen overvoltage is almost the same, so the growth occurs on the cathode surface side. The concentration of hydrogen contained on the direction side becomes almost constant. Therefore, since internal strain can be suppressed to a minimum, long-time electrolysis is possible, and high-purity cobalt is efficiently degraded.
以下本発明による高純度金属コバルトの製造法の実施例
について説明する。Examples of the method for producing high-purity metallic cobalt according to the present invention will be described below.
実施例１
コバルト濃度５０ｇ／βの硫酸コバルトの水溶液を電解
とし、さらに２０ｇ／ｌの硼酸を添加する。陽極として
黒鉛彼３枚、陰極としてニッケル板２枚を用い、電解液
を循環させながら硫酸水溶液を添加して１１）１５．０
に調整し、電流密度ＩＡ／ｄｍＩ、１６Ａの電流を通じ
、液温を６０℃に保持しながら２４０時間電解採取を行
った。ニッケル板との密着性は良好でそり返り又は剥離
なしに金属光沢のあるコバルトを得た。電流効率は９５
％であった。Example 1 An aqueous solution of cobalt sulfate with a cobalt concentration of 50 g/β is used as an electrolyte, and further 20 g/l of boric acid is added. Using three graphite plates as anodes and two nickel plates as cathodes, an aqueous sulfuric acid solution was added while circulating the electrolyte.11) 15.0
A current of 16 A was applied at a current density of IA/dmI, and electrowinning was carried out for 240 hours while maintaining the liquid temperature at 60°C. Adhesion to the nickel plate was good, and cobalt with metallic luster was obtained without warping or peeling. Current efficiency is 95
%Met.
実施例２
コバルト１度６０ｇ／λの硫酸コバルトと塩化コバルト
の２：１混合水溶液を電解浴とし、さらに硼酸１０ｇ／
ｆｉを添加する。陽極として高純度コバルト板３ｒｉ、
陰極としてニッケル板２枚を用い、実施例１と同様にｐ
Ｈ５，０、電流密度１Δ／ｄ ｍ’、６０℃で２４０時
間電解精製を行った。聞出したコバルトはそり返り、割
れ等を生じることなく、金属面を平滑で緻密な金属コバ
ルトを１等だ。Example 2 A 2:1 mixed aqueous solution of cobalt sulfate and cobalt chloride with a cobalt concentration of 60 g/λ was used as an electrolytic bath, and boric acid was further added at 10 g/λ.
Add fi. High purity cobalt plate 3ri as anode,
Two nickel plates were used as cathodes, and p
Electrolytic refining was performed at H5,0, current density 1Δ/d m', and 60°C for 240 hours. The cobalt found is a first-class metal cobalt that has a smooth and dense metal surface without warping or cracking.
電流効率は９７％であった。Current efficiency was 97%.
発明の詳細
な説明したように、陰極にニッケルを使用すると長時間
の電解に対して何ら支障もなく析出が可能となる他、コ
バルト電解採取及び電解精製において種板製造工程を省
くことができるので、生産効率よく金属コバルトの製造
を行うことができる。As described in detail of the invention, the use of nickel for the cathode allows for long-term electrolysis to be deposited without any problems, and also makes it possible to omit the seed plate manufacturing process in cobalt electrowinning and electrolytic refining. , metal cobalt can be manufactured with high production efficiency.
Claims (1)
ケル板を使用することを特徴とする高純度金属コバルト
の製造法。A method for producing high-purity metallic cobalt, characterized by using a nickel plate as a cathode in electrowinning and electrolytic refining of cobalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12521786A JPS62280387A (en) | 1986-05-30 | 1986-05-30 | Production of high purity metallic cobalt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12521786A JPS62280387A (en) | 1986-05-30 | 1986-05-30 | Production of high purity metallic cobalt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62280387A true JPS62280387A (en) | 1987-12-05 |
Family
ID=14904760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12521786A Pending JPS62280387A (en) | 1986-05-30 | 1986-05-30 | Production of high purity metallic cobalt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62280387A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5396959A (en) * | 1977-02-05 | 1978-08-24 | Sumitomo Metal Mining Co | Cobalt powder manufacturing process by electrolysis |
-
1986
- 1986-05-30 JP JP12521786A patent/JPS62280387A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5396959A (en) * | 1977-02-05 | 1978-08-24 | Sumitomo Metal Mining Co | Cobalt powder manufacturing process by electrolysis |
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