JPH0122330B2 - - Google Patents
Info
- Publication number
- JPH0122330B2 JPH0122330B2 JP5646282A JP5646282A JPH0122330B2 JP H0122330 B2 JPH0122330 B2 JP H0122330B2 JP 5646282 A JP5646282 A JP 5646282A JP 5646282 A JP5646282 A JP 5646282A JP H0122330 B2 JPH0122330 B2 JP H0122330B2
- Authority
- JP
- Japan
- Prior art keywords
- palladium
- solution
- dissolved
- iodide
- alloy
- 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.)
- Expired
Links
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 76
- 229910052763 palladium Inorganic materials 0.000 claims description 38
- 239000000243 solution Substances 0.000 claims description 18
- 229910001252 Pd alloy Inorganic materials 0.000 claims description 15
- 239000011259 mixed solution Substances 0.000 claims description 12
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 229910052740 iodine Inorganic materials 0.000 claims description 9
- 239000011630 iodine Substances 0.000 claims description 9
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000010970 precious metal Substances 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 6
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- 239000007800 oxidant agent Substances 0.000 description 4
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 3
- 235000019441 ethanol Nutrition 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- -1 copper alloys Chemical class 0.000 description 2
- LIAWOTKNAVAKCX-UHFFFAOYSA-N hydrazine;dihydrochloride Chemical compound Cl.Cl.NN LIAWOTKNAVAKCX-UHFFFAOYSA-N 0.000 description 2
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 2
- SWELZOZIOHGSPA-UHFFFAOYSA-N palladium silver Chemical compound [Pd].[Ag] SWELZOZIOHGSPA-UHFFFAOYSA-N 0.000 description 2
- 229910000033 sodium borohydride Inorganic materials 0.000 description 2
- 235000009518 sodium iodide Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical group C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- CMMUKUYEPRGBFB-UHFFFAOYSA-L dichromic acid Chemical compound O[Cr](=O)(=O)O[Cr](O)(=O)=O CMMUKUYEPRGBFB-UHFFFAOYSA-L 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- BBKFSSMUWOMYPI-UHFFFAOYSA-N gold palladium Chemical compound [Pd].[Au] BBKFSSMUWOMYPI-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- 150000002496 iodine Chemical class 0.000 description 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000012279 sodium borohydride Substances 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 235000010269 sulphur dioxide Nutrition 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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
Landscapes
- Manufacture And Refinement Of Metals (AREA)
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
ラジウム合金がメツキ、クラツド、焼付け等によ
り銅合金等の金属、プリント基板、セラミツクス
などの材料に被覆されている場合には適当でな
い。たとえば、硝酸や王水などの強酸でこの材料
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ガスを発生させたり、
パラジウムを回収する際に妨害因子として働き著
しく回収効率を低下させたりする。また、シアン
化アルカリ溶液で溶解した場合には、同様に台材
金属まで溶解することがあり還元が困難で、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。 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. For example, if you try to dissolve this material with a strong acid such as nitric acid or aqua regia, it is highly corrosive and will dissolve the base metal, producing NOx gas.
When recovering palladium, it acts as an interfering factor and significantly reduces recovery efficiency. Further, when dissolved in an alkaline cyanide solution, the base metal may also be dissolved, making reduction difficult, and wastewater treatment of the used alkaline cyanide solution is 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
こ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 purpose 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た後、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
後の溶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ある。 The present invention involves dipping a material coated with palladium or palladium alloy into a mixed solution containing a water-soluble iodine solution and an iodide aqueous solution to dissolve the coated palladium or palladium alloy, and then reducing the coated material to the dissolved solution. A method for recovering palladium or the precious metals contained in palladium, which is characterized by adding an oxidizing agent to precipitate palladium or the precious metals contained in palladium, and adding an oxidizing agent to the dissolved solution after precipitating the mixed solution. This is a method for recovering palladium, which can also be recycled, or for recovering precious metals contained in palladium.
本発明において、よう化物水溶液と水溶性のよ
う素溶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
ないしは酸化膜が形成され著しく回収効率が低下
するのでこのよう化膜ないしは酸化膜の形成を防
止するためである。したがつて、パラジウム又は
パラジウム合金の被覆層の厚さが0.1mm以上でも
溶解できる。ここで、よう化物水溶液とは水溶液
中でよう素イオンを遊離するよう化物からなる水
溶液をいい、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要でありよう化物水
溶液に溶けて混合溶液となる。 In the present invention, a mixed solution containing an iodide aqueous solution and a water-soluble iodine solution is used because if the iodide aqueous solution is used alone, a palladium iodide film or oxide film is formed during the reaction, which significantly reduces the recovery efficiency. This is to prevent the formation of such a chemical film or oxide film. Therefore, even if the thickness of the coating layer of palladium or palladium alloy is 0.1 mm or more, it can be dissolved. Here, the iodide aqueous solution refers to an aqueous solution consisting of a compound that liberates iodine ions in an aqueous solution, and includes 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, together with the aqueous iodide solution, plays a role in preventing the formation of an iodide film or an oxide film of palladium, so it needs to be water-soluble and dissolves in the aqueous iodide solution to form a mixed solution.
この混合溶液中にパラジウムや銀―パラジウム
合金、金―パラジウム合金、銀―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。混合溶液中のよう化物とよう素の濃
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。反応を速進させるときは撹拌や加熱
などすればよい。 When a material coated with palladium or a palladium alloy such as a silver-palladium alloy, a gold-palladium alloy, or a silver-palladium-copper alloy is immersed in this mixed solution, the palladium or palladium alloy is selectively dissolved. The concentration of iodide and iodine in the mixed solution is determined by the amount of palladium etc. to be dissolved, and the reaction takes place at room temperature. To speed up 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
PH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, add an oxidizing agent.
If the pH is made 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、過酸化マンガン、重クロム酸、過酸化ナトリ
ウム、塩素、臭素などがある。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、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
ロサルフアイト、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。 Examples of oxidizing agents include hydrogen peroxide, ozone, manganese peroxide, dichromic acid, sodium peroxide, chlorine, and bromine. When salt is generated, it can be recovered by crystallizing it. Reducing agents for precipitating palladium or palladium alloys include, for example, hydrazine, hydrazine dichloride, hydroxylamine, sulfur dioxide, sodium bisulfite, sodium thiosulfate, hydrosulfite, sodium hypophosphite, and borohydride. There is sodium, etc.
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、ヨウ化カリウム９部、水22部、エ
チルアルコール４部の混合溶液に真ちゆうにパラ
ジウムを２ミクロンメツ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 When a material plated with 2 microns of palladium was immersed in a mixed solution of 2 parts of iodine, 9 parts of potassium iodide, 22 parts of water, and 4 parts of ethyl alcohol, the 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銀・パラジウムペ
ーストを焼付けたセラミツクス材料を浸漬したと
ころ60分で銀とパラジウムともに溶解できた。こ
の溶液を二塩化ヒドラジンで還元したところ、パ
ラジウムが還元した後銀が還元され各々回収でき
た。Example 2 When a ceramic material with baked silver/palladium paste was immersed in the same mixed solution as in Example 1, both silver and palladium were dissolved in 60 minutes. When this solution was reduced with hydrazine dichloride, palladium was reduced, and then silver was 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部の混合溶液に銀―パラジウ
ム合金を20ミクロンクラツドした鉄―ニツケル合
金テープ材料を浸漬したところ、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 1 part of iodine, 1 part of sodium iodide, 5 parts of water,
When an iron-nickel alloy tape material coated with 20 microns of silver-palladium alloy was immersed in a mixed solution of 5 parts of methyl alcohol, the palladium was selectively dissolved in 120 minutes. When this solution was reduced with sodium borohydride, palladium was precipitated and recovered.
比較例
ヨウ素２部を除いた以外は実施例１と同様にし
て浸漬したところ0.3ミクロンほどパラジウムが
溶解した後反応がとまつてしまつた。Comparative Example When immersion was carried out in the same manner as in Example 1 except that 2 parts of iodine was removed, the reaction stopped after approximately 0.3 microns of palladium had been dissolved.
以上詳述したように本発明によるパラジウムの
回収方法によれば台材を溶かすことなくパラジウ
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、また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
応を阻害し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 palladium or palladium alloy without melting the base material, and also has the advantage of being able to be used repeatedly if recycled. Note that, if necessary, a buffer or the like may be added within a range that does not inhibit the reaction of the present invention.
Claims (1)
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た後、この溶解溶液に
還元剤を添加してパラジウムを沈澱させることを
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。1. After dissolving the coated palladium or palladium alloy by immersing the material coated with palladium or palladium alloy in a mixed solution containing a water-soluble iodine solution and an iodide aqueous solution, a reducing agent is added to this dissolved solution. A method for recovering palladium or a precious metal contained in palladium, the method comprising precipitating palladium.
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 JPS58174532A (en) | 1983-10-13 |
| JPH0122330B2 true 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) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2619893B2 (en) * | 1988-01-12 | 1997-06-11 | 田中貴金属工業株式会社 | Precious metal recovery method |
| JP2619892B2 (en) * | 1988-01-12 | 1997-06-11 | 田中貴金属工業株式会社 | Precious metal recovery method |
| JP2571591B2 (en) * | 1988-01-14 | 1997-01-16 | 田中貴金属工業株式会社 | Precious metal recovery method |
| 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 |
| AU2003224621A1 (en) * | 2003-02-24 | 2004-09-17 | Lynntech, Inc. | Extraction of metals with diquaternary amines |
-
1982
- 1982-04-05 JP JP57056462A patent/JPS58174532A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58174532A (en) | 1983-10-13 |
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