JPS6324090A - Gold electrolytic solution - Google Patents
Gold electrolytic solutionInfo
- Publication number
- JPS6324090A JPS6324090A JP61167616A JP16761686A JPS6324090A JP S6324090 A JPS6324090 A JP S6324090A JP 61167616 A JP61167616 A JP 61167616A JP 16761686 A JP16761686 A JP 16761686A JP S6324090 A JPS6324090 A JP S6324090A
- Authority
- JP
- Japan
- Prior art keywords
- gold
- alkali metal
- sodium
- iodate
- iodide
- 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
- 239000010931 gold Substances 0.000 title claims abstract description 25
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 23
- 239000008151 electrolyte solution Substances 0.000 title description 7
- 229910052783 alkali metal Inorganic materials 0.000 claims abstract description 7
- -1 alkali metal iodate Chemical class 0.000 claims abstract description 7
- 229910001516 alkali metal iodide Inorganic materials 0.000 claims abstract description 7
- 239000003792 electrolyte Substances 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 6
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 abstract description 6
- NALMPLUMOWIVJC-UHFFFAOYSA-N n,n,4-trimethylbenzeneamine oxide Chemical compound CC1=CC=C([N+](C)(C)[O-])C=C1 NALMPLUMOWIVJC-UHFFFAOYSA-N 0.000 abstract description 5
- 239000011697 sodium iodate Substances 0.000 abstract description 5
- 235000015281 sodium iodate Nutrition 0.000 abstract description 5
- 229940032753 sodium iodate Drugs 0.000 abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004090 dissolution Methods 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 239000003513 alkali Substances 0.000 abstract description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 2
- BHZOKUMUHVTPBX-UHFFFAOYSA-M sodium acetic acid acetate Chemical compound [Na+].CC(O)=O.CC([O-])=O BHZOKUMUHVTPBX-UHFFFAOYSA-M 0.000 abstract description 2
- 235000009518 sodium iodide Nutrition 0.000 abstract description 2
- 238000010979 pH adjustment Methods 0.000 abstract 1
- 239000006174 pH buffer Substances 0.000 abstract 1
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229940021013 electrolyte solution Drugs 0.000 description 2
- ICIWUVCWSCSTAQ-UHFFFAOYSA-M iodate Chemical compound [O-]I(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-M 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- JLKDVMWYMMLWTI-UHFFFAOYSA-M potassium iodate Chemical compound [K+].[O-]I(=O)=O JLKDVMWYMMLWTI-UHFFFAOYSA-M 0.000 description 2
- 239000001230 potassium iodate Substances 0.000 description 2
- 235000006666 potassium iodate Nutrition 0.000 description 2
- 229940093930 potassium iodate Drugs 0.000 description 2
- DFIWJEVKLWMZBI-UHFFFAOYSA-M sodium;dihydrogen phosphate;phosphoric acid Chemical compound [Na+].OP(O)(O)=O.OP(O)([O-])=O DFIWJEVKLWMZBI-UHFFFAOYSA-M 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- RAYRTBVWFWIWBE-UHFFFAOYSA-L dipotassium;iodate;iodide Chemical compound [K+].[K+].[I-].[O-]I(=O)=O RAYRTBVWFWIWBE-UHFFFAOYSA-L 0.000 description 1
- XONPVBSHTLRNAQ-UHFFFAOYSA-L disodium carbonic acid carbonate Chemical compound [Na+].[Na+].OC(O)=O.OC(O)=O.[O-]C([O-])=O XONPVBSHTLRNAQ-UHFFFAOYSA-L 0.000 description 1
- SDIXRDNYIMOKSG-UHFFFAOYSA-L disodium methyl arsenate Chemical compound [Na+].[Na+].C[As]([O-])([O-])=O SDIXRDNYIMOKSG-UHFFFAOYSA-L 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 229940071870 hydroiodic acid Drugs 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、金の電解液の改良に関するものである。[Detailed description of the invention] (Industrial application field) The present invention relates to improvements in gold electrolytes.
（従来技術とその問題点）
従来、金を電気溶解する際の電解液としては、塩酸酸性
電解液が知られている。(Prior art and its problems) Hydrochloric acid acidic electrolyte is conventionally known as an electrolyte for electrolyzing gold.
Ａｕ＋４ＨＣＮ−＋ （ＡｕＣｊ！４）＋４Ｈ”＋３８
しかし、塩酸酸性電解液は、強酸性である為、常に有害
な塩化水素ガスの発生が伴い、また陽極上での副反応に
より有毒な塩素ガスの発生も伴う。Au+4HCN-+ (AuCj!4)+4H”+38
However, since the hydrochloric acid acidic electrolyte is strongly acidic, it always generates harmful hydrogen chloride gas, and also generates toxic chlorine gas due to side reactions on the anode.
２ＨＣ１−Ｉ Ｃ！！、＋２Ｈ”＋２ｅさらに、高電流
密度領域における電解では、塩素ガス発生による分極が
おこる為に、金の溶解が阻害され、金の溶解効率が低下
してしまう。2HC1-IC! ! , +2H''+2eFurthermore, in electrolysis in a high current density region, polarization occurs due to chlorine gas generation, which inhibits gold dissolution and reduces gold dissolution efficiency.
そのためにヨウ素アルカリ金属塩を含む金の電解液が用
いられているが、電流効率においてまだ十分満足のいく
ものではない。For this purpose, a gold electrolyte containing an alkali metal iodine salt has been used, but the current efficiency is still not fully satisfactory.
本発明は、斯かる問題を解決すべくなされたもので、電
流効率の高い金の電解液を提供せんとするものである。The present invention was made to solve this problem, and aims to provide a gold electrolyte with high current efficiency.
（問題点を解決するための手段）
本発明の金の電解液は、１ｌ中にヨウ化アルカリ金属塩
０．１〜５モルとヨウ素酸アルカリ金属塩０．０１〜１
モルを含み、ｐＨが２〜１３．５に調整された水溶液か
ら成ることを特徴とするものである。(Means for Solving the Problems) The gold electrolyte of the present invention contains 0.1 to 5 moles of alkali metal iodide and 0.01 to 1 mole of alkali metal iodate in 1 liter.
It is characterized in that it consists of an aqueous solution containing mol and having a pH adjusted to 2 to 13.5.
本発明による金の電解液は、１ｌ中にヨウ化アルカリ金
属塩（ヨウ化ナトリウム、ヨウ化カリウム）を０．１〜
５Ｍ含んでいる。The gold electrolyte according to the present invention contains 0.1 to 1 liter of alkali metal iodide (sodium iodide, potassium iodide).
Contains 5M.
これは０．ＬＭ／／！以下では金を理論上ｌす、トル当
り５ｇＬか溶かし込む事ができない事、５Ｍ／β以上で
はヨウ化アルカリ金属塩が晶析してしまうなど取扱い上
の問題があげられる。This is 0. LM//! In the following, there are handling problems such as the inability to dissolve gold at a theoretical level of 5 gL per torr, and the alkali metal iodide salt crystallizing at 5 M/β or more.
また、ヨウ素酸アルカリ金属塩を添加すると電流効率が
上昇する理由として、電極表面での反応が下記の（１）
、（２）、（３）弐の合成でおこっているからと考えら
れる。In addition, the reason why the current efficiency increases when an alkali metal iodate is added is that the reaction on the electrode surface is caused by the following (1).
, (2) and (3) This is thought to be due to the synthesis of 2.
Ａｕ＋ ４１−− （Ａｕ １４） −＋ ３ ｅ
−−−−−（１ｌ電解液中にヨウ素酸アルカリが存在す
ると、陽極の金は、電気分解（１）弐と異なる（２）、
（３）式により？電解される。Au+ 41−− (Au 14) −+ 3 e
-------(If there is alkali iodate in the 1L electrolyte, the gold at the anode will be different from electrolysis (1) and (2),
By formula (3)? electrolyzed.
また陽極は正に帯電している為に、負のイオン１０、−
による酸化をうけやすい事があげられる。Also, since the anode is positively charged, negative ions 10, -
The reason for this is that it is easily oxidized by
ヨウ素酸アルカリ金属塩の濃度を０．０１〜ＩＭ／ｌと
した理由として、０．ＯＩＭ／７！以下では通常のヨウ
化アルカリ金属電解浴と比べて効果が小さい事、ＩＭ／
ｊｌ！以上では、ヨウ素酸塩が析出（晶析）し易くなる
為である。The reason why the concentration of alkali metal iodate was set to 0.01 to IM/l was 0.01 to IM/l. OIM/7! The following shows that the effect is smaller than that of a normal alkali metal iodide electrolytic bath, and that IM/
jl! This is because the iodate is more likely to precipitate (crystallize).
ｐ）（の調整は酸（硫酸、塩酸、鎖酸、ヨウ化水素酸、
リン酸、酢酸等）、アルカリ （水酸化ナトリウム、水
酸化カリウム等）によって行うが、特にｐ Ｈの調整を
行わなくても良い。またｐＨの変動をおさえ抑える為に
、ｐ Ｈの緩衝作用を有する塩や酸、アルカリとの組合
せ例えば酢酸−酢酸ナトリウム、リン酸−リン酸２水素
ナトリウム、リン酸２水素ナトリウム−リン酸水素２ナ
トリウム炭酸水素ナトリウム−炭酸、炭酸ナトリウム−
水酸化ナトリウム等によりｐＨ調整しても良い。p) (Preparation of (sulfuric acid, hydrochloric acid, chain acid, hydroiodic acid,
(phosphoric acid, acetic acid, etc.) or alkali (sodium hydroxide, potassium hydroxide, etc.), but there is no need to particularly adjust the pH. In addition, in order to suppress pH fluctuations, combinations with salts, acids, or alkalis that have a pH buffering effect, such as acetic acid-sodium acetate, phosphoric acid-sodium dihydrogen phosphate, sodium dihydrogen phosphate-dihydrogen phosphate, etc. Sodium Sodium Bicarbonate - Carbonic acid, Sodium Carbonate -
The pH may be adjusted using sodium hydroxide or the like.
次に本発明の効果を明瞭にならしめるために、第１図に
示す如く陽イオン交換Ｊｌ！Ｊ １を設けた電解槽２に
おいて陽極３に金板を陰極４に炭素板を用いて陽極３の
合板を溶解し、陽極４の減量を求め、それにより電流効
率を求めた。Next, in order to clearly show the effects of the present invention, as shown in FIG. 1, cation exchange Jl! In the electrolytic cell 2 equipped with J 1, a gold plate was used as the anode 3 and a carbon plate was used as the cathode 4, and the plywood of the anode 3 was melted to determine the weight loss of the anode 4, thereby determining the current efficiency.
（実施例１）
１１当たりヨウ化カリウムＩＭ、当つ素酸カリウム０．
２Ｍを含む溶液に硫酸及び水酸化ナトリウムを加えｐＨ
を、各々２．７．１０．１３及び比較例として１４に調
整した電解液を５０゛Ｃで０．５ｄｍ２の金板にＩＯＡ
で３０分通電したところ、第２図のような結果を得た。(Example 1) Potassium iodide IM per 11, potassium dinate 0.
Add sulfuric acid and sodium hydroxide to a solution containing 2M and adjust the pH.
The electrolyte solution adjusted to 2.7.10.13 and 14 as a comparative example was applied to a 0.5 dm2 gold plate at 50°C using IOA.
When electricity was applied for 30 minutes, the results shown in Figure 2 were obtained.
（従来例１）
ヨウ素酸カリウムのを加えない−ＬＭ／７！ヨウ化カリ
ウム溶液に実施例１と同条件で通電したところ、第２図
のような結果が得られた。(Conventional Example 1) No addition of potassium iodate - LM/7! When electricity was applied to the potassium iodide solution under the same conditions as in Example 1, the results shown in FIG. 2 were obtained.
実施例による電解液の電流効率は従来例のそれよりｐＨ
２〜１３において５〜２２％高い値を示した。The current efficiency of the electrolyte according to the example is higher than that of the conventional example.
2 to 13 showed 5 to 22% higher values.
（実施例２）
１１当りヨウ化カリウム３Ｍとヨウ素酸ナトリウム０．
５Ｍを含みｐＨ１０に調整した電解液を用い、液温６５
゛Ｃで０．５ｄｍ”の金仮に、ＩＯＡ （２ＯＡ ／ｄ
ｍ２）２ＯＡ （４０Ａ／ｄｍ２） 、４ＱＡ （８０
Ａ／ｄｍ”）の３条件で各々３０分通電したところ、第
３図のような結果が得られた。(Example 2) Potassium iodide 3M and sodium iodate 0.11.
Using an electrolytic solution containing 5M and adjusted to pH 10, the solution temperature was 65%.
If gold is 0.5dm at C, IOA (2OA/d
m2) 2OA (40A/dm2), 4QA (80
When electricity was applied for 30 minutes under each of three conditions (A/dm"), the results shown in FIG. 3 were obtained.
（従来例２）
ヨウ素酸ナトリウムを含まないヨウ化カリウム３ Ｍ
／ Ｉ！電解液を用い実施例２と同条件で通電したとこ
ろ、第３図のような結果が得られた。(Conventional example 2) Potassium iodide 3M without sodium iodate
/ I! When electricity was applied using an electrolytic solution under the same conditions as in Example 2, the results shown in FIG. 3 were obtained.
（実施例３及び従来例３）
下記の表−１の左欄に示す実施例及び従来例の電解液を
調整しｐＨ＝１０としたものを５０’Ｃ２２０Ａ／ｄＩ
Ｉ２で３０分ｉｌ電したところ表の右欄のようになった
。ＫＩＯ，が多い方が電流効率が高いことがわかる。(Example 3 and Conventional Example 3) The electrolyte solutions of the example and conventional example shown in the left column of Table 1 below were adjusted to pH = 10 and were 50'C220A/dI.
When I powered up I2 for 30 minutes, the result was as shown in the right column of the table. It can be seen that the more KIO, the higher the current efficiency.
表−１
（実施例４）
ヨウ化カリウム３Ｍ＃２ヨウ素酸ナトリウム０．５Ｍ／
１ （ｐＨ−１０）を電解液として、５０℃で０．５
ｄＩＩｌｉのＡｕ板に１０Ａｉｆｆｉ電し、Ａ１ｌ板の
減量を測定した。Table-1 (Example 4) Potassium iodide 3M #2 Sodium iodate 0.5M/
1 (pH-10) as the electrolyte, 0.5 at 50℃
The Au plate of dIIli was charged with 10Aiffi, and the weight loss of the Al plate was measured.
参考例として０ 、５ｄｍ ”の合板を５０℃で上記の
電解凍にひたしそのｉＦ！２４ｆｔを求めた。As a reference example, plywood of 0.5 dm'' was immersed in the above electrolytic freezing at 50°C, and its iF!24ft was determined.
（従来例４）
ヨウ素酸ナトリウムを加えないヨウ化カリウム３Ｍ／β
の電解液で実施例４と同条件で通電し減量を測定した。(Conventional example 4) Potassium iodide 3M/β without adding sodium iodate
Electricity was applied to the electrolytic solution under the same conditions as in Example 4, and the weight loss was measured.
以上の結果を下記の表−２に示す。The above results are shown in Table 2 below.
上記の表−２より判るようにヨウ化カリウム−ヨウ素酸
カリウム液自身による金の熔解はわずかであり、電解に
よりヨウ素酸カリウムが効果的に働いている事がわかる
。As can be seen from Table 2 above, the potassium iodide-potassium iodate solution itself melts only a small amount of gold, indicating that potassium iodate is working effectively through electrolysis.
（発明の効果）
以上の説明から判るように本発明による金の電解液は、
高電流密度領域においても金の溶解効率が高い為、本電
解液を使用し電気溶解条件の高電流密度化することによ
り、金の電気溶解装置を小型化することができるという
優れた効果が得られる。(Effect of the invention) As can be seen from the above explanation, the gold electrolyte according to the present invention has
Since the dissolution efficiency of gold is high even in the high current density region, by using this electrolyte and increasing the current density of the electrolytic melting conditions, an excellent effect can be obtained in that the gold electrolytic melting equipment can be made smaller. It will be done.
第１図は電解槽の概略図、第２図は電解液のｐＨと電流
効率の関係を示すグラフ、第３図は電解電流と電流効率
の関係を示すグラフである。
出願人 田中貴金属工業株式会社
第１図
ゝ１
第２図
（ＰＨ）
第３図
（Ａ）FIG. 1 is a schematic diagram of an electrolytic cell, FIG. 2 is a graph showing the relationship between the pH of the electrolytic solution and current efficiency, and FIG. 3 is a graph showing the relationship between electrolysis current and current efficiency. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1 1 Figure 2 (PH) Figure 3 (A)
Claims (1)
酸アルカリ金属塩０．０１〜１モルを含みｐＨが２〜１
３．５に調整された水溶液からなる金の電解液。Contains 0.1 to 5 moles of alkali metal iodide and 0.01 to 1 mole of alkali metal iodate in 1 liter and has a pH of 2 to 1.
Gold electrolyte consisting of an aqueous solution adjusted to 3.5.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61167616A JPS6324090A (en) | 1986-07-16 | 1986-07-16 | Gold electrolytic solution |
| US07/073,509 US4859293A (en) | 1986-07-16 | 1987-07-15 | Process for refining gold and apparatus employed therefor |
| AU75670/87A AU607921B2 (en) | 1986-07-16 | 1987-07-15 | Process for refining gold and apparatus employed therefor |
| DE8787830273T DE3775645D1 (en) | 1986-07-16 | 1987-07-15 | METHOD AND DEVICE FOR CLEANING GOLD. |
| EP87830273A EP0253783B1 (en) | 1986-07-16 | 1987-07-15 | Process for refining gold and apparatus employed therefor |
| CA000542230A CA1322855C (en) | 1986-07-16 | 1987-07-15 | Process for refining gold and apparatus employed therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61167616A JPS6324090A (en) | 1986-07-16 | 1986-07-16 | Gold electrolytic solution |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6324090A true JPS6324090A (en) | 1988-02-01 |
| JPH0573836B2 JPH0573836B2 (en) | 1993-10-15 |
Family
ID=15853086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61167616A Granted JPS6324090A (en) | 1986-07-16 | 1986-07-16 | Gold electrolytic solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6324090A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5025815B1 (en) * | 2011-08-10 | 2012-09-12 | 小島化学薬品株式会社 | Hard gold plating solution |
| WO2019150198A1 (en) * | 2018-02-01 | 2019-08-08 | Enviroleach Technologies Inc. | Methods, materials and techniques for precious metal recovery |
| US10563283B2 (en) | 2016-06-24 | 2020-02-18 | Enviroleach Technologies Inc. | Methods, materials and techniques for precious metal recovery |
| EP3655557A4 (en) * | 2017-07-17 | 2021-01-13 | Enviroleach Technologies Inc. | Methods, materials and techniques for precious metal recovery |
-
1986
- 1986-07-16 JP JP61167616A patent/JPS6324090A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5025815B1 (en) * | 2011-08-10 | 2012-09-12 | 小島化学薬品株式会社 | Hard gold plating solution |
| US10563283B2 (en) | 2016-06-24 | 2020-02-18 | Enviroleach Technologies Inc. | Methods, materials and techniques for precious metal recovery |
| EP3655557A4 (en) * | 2017-07-17 | 2021-01-13 | Enviroleach Technologies Inc. | Methods, materials and techniques for precious metal recovery |
| WO2019150198A1 (en) * | 2018-02-01 | 2019-08-08 | Enviroleach Technologies Inc. | Methods, materials and techniques for precious metal recovery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0573836B2 (en) | 1993-10-15 |
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