JPS58174532A - Recovery of palladium or noble metal mixed in palladium - Google Patents
Recovery of palladium or noble metal mixed in palladiumInfo
- Publication number
- JPS58174532A JPS58174532A JP57056462A JP5646282A JPS58174532A JP S58174532 A JPS58174532 A JP S58174532A JP 57056462 A JP57056462 A JP 57056462A JP 5646282 A JP5646282 A JP 5646282A JP S58174532 A JPS58174532 A JP S58174532A
- Authority
- JP
- Japan
- Prior art keywords
- palladium
- solution
- alloy
- mixed
- mixed solution
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
Description
【発明の詳細な説明】
本発明はパラジウム又はパラジウム合金を被覆した材料
からパラジウム又はパラジウムに配合されている貴金属
を回収する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for recovering palladium or a noble metal contained in palladium from a material coated with palladium or a palladium alloy.
従来、パラジウムの溶解方法としては、強酸やシアン化
アルカリ溶液で溶解することが知られていた。しかしな
がら、従来法は、パラジウムやパラジウム合金がメッキ
、クラッド、焼付は等により銅合金等の金属、プリント
基板、セラミックスなどの材料に被覆されている場合に
は適当でない。Conventionally, it has been known that palladium can be dissolved using a strong acid or an alkaline cyanide solution. However, conventional methods are not suitable when palladium or palladium alloys are coated on materials such as metals such as copper alloys, printed circuit boards, ceramics, etc. by plating, cladding, baking, etc.
九とえば、硝酸や王水などの強酸てこの材料を溶解しよ
うとすると、腐食性が強いため台材金属まで溶解してし
まいＮＯｘ ガスを発生させ＊ｊ、パラジウムを回収
する際に前書因子として働き著しく回収効率を低下させ
たりする、また、シアン化アルカ！Ｊｌｌｌｌｌで溶解
した場合には、同様に台材金ｊ＠まで溶解することがあ
り還元が困難て、かつ、使用済みシアン化アルカリ溶液
の廃水処理費用が高価で経済的でない。For example, if you try to dissolve strong acid lever materials such as nitric acid or aqua regia, they are highly corrosive and will dissolve the base metal, producing NOx gas. Also, alkali cyanide acts as a substance and significantly reduces recovery efficiency! In the case of dissolving with Jllllll, the base gold J@ may also be dissolved, making reduction difficult and the cost of wastewater treatment of the used alkali cyanide solution being expensive and uneconomical.
本発明は上記欠点に鑑みなされたもので、パラジウム又
はパラジウム合金のみを溶解し還元するととを目的とす
るものである。The present invention was made in view of the above-mentioned drawbacks, and its object is to melt and reduce only palladium or palladium alloys.
本発明は、パラジウム又はパラジウム合金を被覆した材
料を水溶性のよう素溶液とよう化物水溶液とを含む混合
溶液中に浸漬１−で被覆され九パラジウム又はパラジウ
ム合金を溶解した彼、この溶解溶液に還元剤を添加して
パラジウム又はパラジウムに配合されている貴金属を沈
殿させることを特徴とするパラジウム又はパラジウムに
配合されている貴金属の回収方法であり、混合溶液を沈
殿後の＃解溶液に酸化剤を添加して再生することもでき
るパラジウムの回収又はパラジウムに配合されている貴
金属回収方法でろ乙、。In the present invention, a material coated with palladium or palladium alloy is immersed in a mixed solution containing an aqueous iodine solution and an aqueous iodide solution. This is a method for recovering palladium or the precious metals contained in palladium, which is characterized by adding a reducing agent to precipitate palladium or the precious metals contained in palladium. Palladium can be recovered by adding palladium, or precious metals contained in palladium can be recovered.
本発明において、よう化物水溶液と水溶性のようＪＥ！
液とを含む混合溶液を用いるのは、よう化物水溶液単独
では反応中にパラジウムのよう化膜ないしは識化膜が形
成され著しく回収効率が低下１’ｌｌｌ
するのでこのよう化膜ないし＃□′酸化膜の形成を防止
するためである。したがって、パラジウム又はパラジウ
ム合金の被覆層の厚さが０．１部以上でも溶解できる。In the present invention, an iodide aqueous solution and a water-soluble JE!
The reason for using a mixed solution containing aqueous iodide is that if an aqueous iodide solution is used alone, an iodide film or a recognition film of palladium will be formed during the reaction, which will significantly reduce the recovery efficiency. This is to prevent the formation of a film. Therefore, even if the thickness of the coating layer of palladium or palladium alloy is 0.1 part or more, it can be dissolved.
ここで、よう化物水溶液とけ水溶液中でよう素イオン管
遊離するよう化物からなる水溶液管いい、よう化カリウ
ム、よう化ナトリウムなどのよう化物がある。また、よ
う素溶液とはよう素がよう化物を形成することなく溶解
している溶液のことで、エチルアルコール、メチルアル
コール等のアルコールの溶液がある。このよう素溶液は
、よう化物水溶液と一緒にパラジウムのよう化膜ないし
酸化膜の形成を防止する役割を果たすので、水溶性であ
ることが必費でありよう化物水溶液に溶けて混合溶液と
なる。Here, an aqueous solution tube consisting of a compound which liberates an iodine ion tube in an aqueous iodide solution is used, and there are iodides such as potassium iodide and sodium iodide. Furthermore, an iodine solution is a solution in which iodine is dissolved without forming iodide, and includes solutions of alcohols such as ethyl alcohol and methyl alcohol. This iodine solution plays the role of preventing the formation of palladium iodide film or oxide film together with the iodide aqueous solution, so it must be water-soluble and dissolves in the iodide aqueous solution to form a mixed solution. .
この混合溶液中にパラジウムや鏝−パラジウム合金、針
フラジラム合金、鎖−パラジウム−銅合金などのパラジ
ウム合金を被覆した材料を浸漬すると選択的にパラジウ
ム又はパラジウム合金が溶解される。混合＃液中のよう
化物とよう素の鎖度は溶解したいパラジウム等の量で定
まり、室温で反応する。反応を：：葎進させるときは攪
拌や加熱などすればよい。When a material coated with palladium or a palladium alloy such as a trowel-palladium alloy, a needle-fragilum alloy, or a chain-palladium-copper alloy is immersed in this mixed solution, the palladium or palladium alloy is selectively dissolved. The chain degree of iodide and iodine in the mixed solution is determined by the amount of palladium, etc. to be dissolved, and the reaction occurs at room temperature. To accelerate the reaction, stirring or heating may be used.
混合溶液を再生する場合、酸化剤を添加してＰ）（を酸
性にすればもとの混合溶液として使用でき薬品が節約で
きる。When regenerating a mixed solution, if an oxidizing agent is added to make P) (acidic), it can be used as the original mixed solution and chemicals can be saved.
酸化剤としては、たとえば過酸化水素、オゾン。Examples of oxidizing agents include hydrogen peroxide and ozone.
過酸化マンガン、重クロム酸、過酸化ナトリウム。Manganese peroxide, dichromic acid, sodium peroxide.
塩素、臭素などがある１、塩が生じたときは、塩を結晶
化させ回収すればよい。また、パラジウム又はパラジウ
ム合金を沈殿させるための還元剤としては、たとえばヒ
ドラジン、二塩化ヒドラジン。Chlorine, bromine, etc. 1. If salt is generated, it can be recovered by crystallizing the salt. Furthermore, examples of reducing agents for precipitating palladium or palladium alloys include hydrazine and hydrazine dichloride.
ヒドロキシルアミン、二酸化イオウ、重亜硫酸ナトリウ
ム、チオ硫酸ナトリウム、ハイドロサルファイド、次亜
リン酸ナトリウム、水素化ホウ素ナトリウムなどがある
。These include hydroxylamine, sulfur dioxide, sodium bisulfite, sodium thiosulfate, hydrosulfide, sodium hypophosphite, and sodium borohydride.
以下実施例および比較例について説明する。Examples and comparative examples will be described below.
〔実施例１〕
ヨウ素２部、８ヨウ化力リウム９部、水２２部、エチル
アルコール４部の混合溶液に真ちゅうにパラジウムを２
ミクロンメッキした材料を浸漬したところ１０分でパラ
ジウムが溶解できた。[Example 1] Add 2 parts of palladium to brass in a mixed solution of 2 parts of iodine, 9 parts of 8-hydrium iodide, 22 parts of water, and 4 parts of ethyl alcohol.
When micron-plated material was immersed, palladium was dissolved in 10 minutes.
この溶液をヒドラジンで還元したところパラジウムが沈
殿し回収できた。When this solution was reduced with hydrazine, palladium was precipitated and recovered.
〔実施例２〕
実施例１と同様の混合溶液に＠・パラジウムペーストを
焼付けたセラミックス材料を浸漬し九ところ６０分で銀
とパラジウムともに溶解で！ｌた。[Example 2] Ceramic material baked with palladium paste was immersed in the same mixed solution as in Example 1, and both silver and palladium were dissolved in 60 minutes! It was.
この溶液を二塩化ヒドラジンで還元し友ところ、パラジ
ウムが還元した後鋏が還元され各々回収できた。This solution was reduced with hydrazine dichloride, and after the palladium was reduced, the scissors were reduced and each was recovered.
〔実施例３〕
ヨウ素１部、ヨウ化ナトリウム１部、水５部、メチルア
ルコール５部の混合＃［Ｋ＊−パラジウム合金を２０ミ
クロンクラッドした鉄−ニッケル合金テープ材料を浸漬
したとζろ、１２０ 分でパラジウムが選択的に溶解で
きた。この溶液を水素化ホウ素ナトリウムで還元したと
ころ、パラジウムが沈殿し回収できた。[Example 3] A mixture of 1 part of iodine, 1 part of sodium iodide, 5 parts of water, and 5 parts of methyl alcohol. Palladium was selectively dissolved in 120 minutes. When this solution was reduced with sodium borohydride, palladium was precipitated and recovered.
ヨウ素２部を除いた以外は実施例１と一様にして浸漬し
たところ０．３ミクロンはどパラジウムが溶解した後反
応がとまってしまっ先。When immersed in the same manner as in Example 1 except that 2 parts of iodine was removed, the reaction stopped after 0.3 micron of palladium was dissolved.
以上詳述したように本発明によるパラジウムの回収方法
によれば合材を溶かすことなくバッジウム又はパラジウ
ム合金を溶解することができる効果があり、まな再生−
すればくり返し使用できるなどの効果がある。なお、必
要に応じて本発明の反応を阻害Ｌ７ない範囲で緩衝剤等
添加しても良い。As detailed above, the palladium recovery method according to the present invention has the effect of being able to melt baddium or palladium alloy without melting the composite material, and can be used for recycling.
It has the effect of being able to be used repeatedly. Incidentally, if necessary, a buffer or the like may be added within a range that does not inhibit the reaction of the present invention L7.
出願人 田中貴金属工業株式会社Applicant: Tanaka Kikinzoku Kogyo Co., Ltd.
Claims (2)
群を水溶性のよう素溶液とよう化物水溶液とを含む混合
溶液中に浸漬して被覆されたパラジウム又はパラジウム
合金を溶解し次後、この溶解溶′ｆＩｉ、に還元剤を添
加してパラジウムを沈殿させることを１＃轍とするパラ
ジウム又はパラジウムに配合されている貴金属の回収方
法。(1) The palladium or palladium alloy is immersed in a mixed solution containing a water-soluble iodine solution and an iodide aqueous solution to dissolve the coated palladium or palladium alloy. A method for recovering palladium or a noble metal contained in palladium, which involves adding a reducing agent to fIi to precipitate palladium.
て、混合溶液が沈ＩＲ發の溶解Ｓ液に酸化剤を添加して
再生されていることを４１１とするパラジウム又はパラ
ジウムに配合されている貴金属の回収方法。(2) In the recovery method described in claim 1, the mixed solution is palladium or palladium that is regenerated by adding an oxidizing agent to the dissolved S solution of precipitated IR. How to recover precious metals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57056462A JPS58174532A (en) | 1982-04-05 | 1982-04-05 | Recovery of palladium or noble metal mixed in palladium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57056462A JPS58174532A (en) | 1982-04-05 | 1982-04-05 | Recovery of palladium or noble metal mixed in palladium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58174532A true JPS58174532A (en) | 1983-10-13 |
| JPH0122330B2 JPH0122330B2 (en) | 1989-04-26 |
Family
ID=13027762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57056462A Granted JPS58174532A (en) | 1982-04-05 | 1982-04-05 | Recovery of palladium or noble metal mixed in palladium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58174532A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01180923A (en) * | 1988-01-12 | 1989-07-18 | Tanaka Kikinzoku Kogyo Kk | Recovering method for noble metal |
| JPH01180922A (en) * | 1988-01-12 | 1989-07-18 | Tanaka Kikinzoku Kogyo Kk | Recovering method for noble metal |
| JPH01184238A (en) * | 1988-01-14 | 1989-07-21 | Tanaka Kikinzoku Kogyo Kk | Method for recovering noble metal |
| JPH01242730A (en) * | 1988-03-23 | 1989-09-27 | Tanaka Kikinzoku Kogyo Kk | Method for recovering noble metal |
| WO2004076697A1 (en) * | 2003-02-24 | 2004-09-10 | Lynntech, Inc. | Extraction of metals with diquaternary amines |
| US7175818B2 (en) | 2002-02-07 | 2007-02-13 | Lynntech, Inc. | Extraction of metals with diquaternary ammonium salts |
-
1982
- 1982-04-05 JP JP57056462A patent/JPS58174532A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01180923A (en) * | 1988-01-12 | 1989-07-18 | Tanaka Kikinzoku Kogyo Kk | Recovering method for noble metal |
| JPH01180922A (en) * | 1988-01-12 | 1989-07-18 | Tanaka Kikinzoku Kogyo Kk | Recovering method for noble metal |
| JPH01184238A (en) * | 1988-01-14 | 1989-07-21 | Tanaka Kikinzoku Kogyo Kk | Method for recovering noble metal |
| JPH01242730A (en) * | 1988-03-23 | 1989-09-27 | Tanaka Kikinzoku Kogyo Kk | Method for recovering noble metal |
| US7175818B2 (en) | 2002-02-07 | 2007-02-13 | Lynntech, Inc. | Extraction of metals with diquaternary ammonium salts |
| WO2004076697A1 (en) * | 2003-02-24 | 2004-09-10 | Lynntech, Inc. | Extraction of metals with diquaternary amines |
| GB2415190A (en) * | 2003-02-24 | 2005-12-21 | Lynntech Inc | Extraction of metals with diquaternary amines |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0122330B2 (en) | 1989-04-26 |
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