JPH0573836B2 - - Google Patents
Info
- Publication number
- JPH0573836B2 JPH0573836B2 JP61167616A JP16761686A JPH0573836B2 JP H0573836 B2 JPH0573836 B2 JP H0573836B2 JP 61167616 A JP61167616 A JP 61167616A JP 16761686 A JP16761686 A JP 16761686A JP H0573836 B2 JPH0573836 B2 JP H0573836B2
- Authority
- JP
- Japan
- Prior art keywords
- gold
- iodate
- electrolyte
- alkali metal
- sodium
- 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 - Lifetime
Links
- 239000010931 gold Substances 0.000 claims description 23
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 20
- 229910052737 gold Inorganic materials 0.000 claims description 20
- 239000003792 electrolyte Substances 0.000 claims description 15
- 229910052783 alkali metal Inorganic materials 0.000 claims description 5
- -1 alkali metal iodate Chemical class 0.000 claims description 5
- 229910001516 alkali metal iodide Inorganic materials 0.000 claims description 5
- 239000007864 aqueous solution Substances 0.000 claims description 2
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000008151 electrolyte solution Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- NALMPLUMOWIVJC-UHFFFAOYSA-N n,n,4-trimethylbenzeneamine oxide Chemical compound CC1=CC=C([N+](C)(C)[O-])C=C1 NALMPLUMOWIVJC-UHFFFAOYSA-N 0.000 description 4
- JLKDVMWYMMLWTI-UHFFFAOYSA-M potassium iodate Chemical compound [K+].[O-]I(=O)=O JLKDVMWYMMLWTI-UHFFFAOYSA-M 0.000 description 4
- 239000001230 potassium iodate Substances 0.000 description 4
- 235000006666 potassium iodate Nutrition 0.000 description 4
- 229940093930 potassium iodate Drugs 0.000 description 4
- 239000011697 sodium iodate Substances 0.000 description 4
- 235000015281 sodium iodate Nutrition 0.000 description 4
- 229940032753 sodium iodate Drugs 0.000 description 4
- 230000004580 weight loss Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- ICIWUVCWSCSTAQ-UHFFFAOYSA-M iodate Chemical compound [O-]I(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-M 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910003771 Gold(I) chloride Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound 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
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 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
- 239000000460 chlorine Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-N diphosphoric acid Chemical compound OP(O)(=O)OP(O)(O)=O XPPKVPWEQAFLFU-UHFFFAOYSA-N 0.000 description 1
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 1
- 229940021013 electrolyte solution Drugs 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- FDWREHZXQUYJFJ-UHFFFAOYSA-M gold monochloride Chemical compound [Cl-].[Au+] FDWREHZXQUYJFJ-UHFFFAOYSA-M 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
- 239000007788 liquid Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- BHZOKUMUHVTPBX-UHFFFAOYSA-M sodium acetic acid acetate Chemical compound [Na+].CC(O)=O.CC([O-])=O BHZOKUMUHVTPBX-UHFFFAOYSA-M 0.000 description 1
- 235000009518 sodium iodide Nutrition 0.000 description 1
- POECFFCNUXZPJT-UHFFFAOYSA-M sodium;carbonic acid;hydrogen carbonate Chemical compound [Na+].OC(O)=O.OC([O-])=O POECFFCNUXZPJT-UHFFFAOYSA-M 0.000 description 1
- 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 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)
Description
（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。
（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。
Au＋4HCl→〔AuCl4〕＋4H+＋3e
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。
2HCl→Cl2＋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。
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。
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。
（問題点を解決するための手段）
本発明の金の電解液は、１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。
本発明による金の電解液は、１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。
これは0.1M／以下では金を理論上１リツト
ル当り５ｇしか溶かし込む事ができない事、
5M／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。
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)式の合成でおこつているから
と考えられる。
Au＋4I-→〔AuI4〕-＋3e ……(1)
I-＋3OH-→IO3 -＋3H+＋6e
2Au＋IO3 -＋7I-＋3H2O→２〔AuI4〕-6OH- ……(2)
……(3)
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)式と異なる(2)、(3)式により
溶解される。
また陽極は正に帯電している為に、負のイオン
IO3 -による酸化をうけやすい事があげられる。
ヨウ素酸アルカリ金属塩の濃度を0.01〜1M／
とした理由として、0.01M／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、1M／以上では、ヨウ素酸塩が析出（晶析）
し易くなる為である。
PHの調整は酸（硫酸、塩酸、硝酸、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）によつて行うが、特に
PH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、PH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。
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膜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の金板を溶解し、陽極４の減量を求
め、それにより電流効率を求めた。
実施例 １
１当たりヨウ化カリウム1M、ヨウ素酸カリ
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℃で0.5dm2の金板に
10Aで30分通電したところ、第２図のような結果
を得た。
従来例 １
ヨウ素酸カリウムのを加えない1M／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。
実施例による電解液の電流効率は従来例のそれ
よりPH２〜13において５〜22％高い値を示した。
実施例 ２
１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℃で0.5dm2の金板に、10A（20A／ｄm2）
20A（40A／ｄm2）、40A（80A／ｄm2）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。
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
3M／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。
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℃、20A／
ｄm2で30分通電したところ表の右欄のようになつ
た。KIO3が多い方が電流効率が高いことがわか
る。
(Industrial Application Field) The present invention relates to improvement of gold electrolyte. (Prior art and its problems) Conventionally, as an electrolyte when electrolyzing gold,
Hydrochloric acid acidic electrolytes are known. Au + 4HCl → [AuCl 4 ] + 4H + + 3e However, since the hydrochloric acid acidic electrolyte is strongly acidic,
The generation of harmful hydrogen chloride gas is always accompanied by the generation of toxic chlorine gas due to side reactions on the anode. 2HCl→Cl 2 +2H + +2e Furthermore, in electrolysis in a high current density region, polarization occurs due to chlorine gas generation, which inhibits gold dissolution and reduces gold dissolution efficiency. For this purpose, a gold electrolyte containing an alkali metal iodine salt has been used, but the current efficiency is still not fully satisfactory. The present invention was made to solve this problem, and aims to provide a gold electrolyte with high current efficiency. (Means for Solving the Problems) The gold electrolyte of the present invention contains 0.1 to 5 moles of alkali metal iodide and alkali metal iodate in one part.
It is characterized by comprising an aqueous solution containing 0.01 to 1 mol and having a pH adjusted to 2 to 13.5. The gold electrolyte according to the present invention contains 0.1 to 5M of alkali metal iodide (sodium iodide, potassium iodide). This means that below 0.1M/liter, only 5g of gold can be dissolved per liter in theory.
If the concentration exceeds 5M, there may be problems in handling such as crystallization of the alkali metal iodide salt. Furthermore, the reason why the current efficiency increases when an alkali metal iodate salt is added is thought to be that reactions on the electrode surface occur in the synthesis of formulas (1), (2), and (3) below. Au＋4I - → [AuI 4 ] - +3e ...(1) I - +3OH - →IO 3 - +3H + +6e 2Au+IO 3 - +7I - +3H 2 O→2[AuI 4 ] - 6OH - ...(2) ...( 3) When alkali iodate is present in the electrolytic solution, gold in the anode is dissolved according to equations (2) and (3), which are different from electrolysis equation (1). Also, since the anode is positively charged, negative ions
One example is that it is susceptible to oxidation by IO 3 - . Adjust the concentration of alkali metal iodate to 0.01-1M/
The reason for this is that below 0.01M, the effect is smaller compared to normal alkali metal iodide electrolytic baths, and above 1M, iodate will precipitate (crystallize).
This is because it is easier to do. PH is adjusted using acids (sulfuric acid, hydrochloric acid, nitric acid, hydroiodic acid, phosphoric acid, acetic acid, etc.) and alkalis (sodium hydroxide, potassium hydroxide, etc.), but especially
There is no need to adjust the PH. In addition, in order to suppress PH fluctuations, salts and acids that have a PH buffering effect,
Combinations with alkalis, such as acetic acid-sodium acetate, phosphoric acid-sodium dihydrogen phosphate, diphosphoric acid
PH may be adjusted using sodium hydrogen-disodium hydrogen phosphate, sodium hydrogen carbonate-carbonate, sodium carbonate-sodium hydroxide, etc. Next, in order to clearly demonstrate the effects of the present invention,
As shown in FIG. 1, in an electrolytic cell 2 equipped with a cation exchange membrane 1, a gold plate is used as an anode 3 and a carbon plate is used as a cathode 4, and the gold plate of the anode 3 is melted to determine the weight loss of the anode 4. The current efficiency was determined. Example 1 Sulfuric acid and sodium hydroxide were added to a solution containing 1 M of potassium iodide and 0.2 M of potassium iodate per unit to adjust the pH to 2, 7, 10, 13, respectively, and 14 as a comparative example. Electrolyte solutions were heated at 50°C. on a 0.5dm 2 gold plate
When the current was applied at 10A for 30 minutes, the results shown in Figure 2 were obtained. Conventional Example 1 When a 1M potassium iodide solution without the addition of potassium iodate was energized under the same conditions as in Example 1, the results shown in FIG. 2 were obtained. The current efficiency of the electrolytic solution according to the example was 5 to 22% higher than that of the conventional example at pH 2 to 13. Example 2 Using an electrolytic solution containing 3M of potassium iodide and 0.5M of sodium iodate per unit and adjusted to PH10,
10A (20A/ dm2 ) on a 0.5dm2 gold plate at a liquid temperature of 65℃
When electricity was applied for 30 minutes under three conditions: 20A (40A/dm 2 ) and 40A (80A/dm 2 ), the results shown in FIG. 3 were obtained. Conventional example 2 Potassium iodide without sodium iodate
When electricity was applied using 3M/electrolyte under the same conditions as in Example 2, the results shown in FIG. 3 were obtained. Example 3 and Conventional Example 3 The electrolytes of the Example and Conventional Example shown in the left column of Table 1 below were adjusted to PH=10 and heated at 50°C and 20A/
When I turned on the DM2 for 30 minutes, the result was as shown in the right column of the table. It can be seen that the more KIO 3 there is, the higher the current efficiency is.
【表】
実施例 ４
ヨウ化カリウム3M／ヨウ素酸ナトリウム
0.5M／（PH＝10）を電解液として、50℃で
0.5dm2のAu板に10A通電し、Au板の減量を測定
した。
参考例として0.5dm2の金板を50℃で上記の電解
液にひたしその減量を求めた。
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／の電解液で実施例４と同条件で通電し減
量を測定した。
以上の結果を下記の表−２に示す。[Table] Example 4 Potassium iodide 3M/sodium iodate
0.5M/(PH=10) as electrolyte at 50℃
A current of 10 A was applied to a 0.5 dm 2 Au plate, and the weight loss of the Au plate was measured. As a reference example, a 0.5 dm 2 gold plate was immersed in the above electrolyte at 50°C and its weight loss was determined. Conventional example 4 Potassium iodide without adding sodium iodate
Electricity was applied using a 3M electrolytic solution under the same conditions as in Example 4, and the weight loss was measured. The above results are shown in Table 2 below.
【表】
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溶解はわずか
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。
（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。[Table] As seen from Table 2 above, potassium iodide
The dissolution of gold by the potassium iodate solution itself is minimal, indicating that potassium iodate is working effectively through electrolysis. (Effects of the Invention) As can be seen from the above explanation, the gold electrolyte according to the present invention has high gold dissolution efficiency even in a high current density region. As a result, an excellent effect can be obtained in that the gold electrolytic melting apparatus can be downsized.
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。
Figure 1 is a schematic diagram of the electrolytic cell, Figure 2 is the pH of the electrolyte
FIG. 3 is a graph showing the relationship between electrolytic current and current efficiency.
Claims (1)
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なる金の電解
液。1 Contains 0.1 to 5 moles of alkali metal iodide and 0.01 to 1 mole of alkali metal iodate; PH
A gold electrolyte consisting of an aqueous solution with a pH of 2 to 13.5.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61167616A JPS6324090A (en) | 1986-07-16 | 1986-07-16 | Gold electrolytic solution |
| DE8787830273T DE3775645D1 (en) | 1986-07-16 | 1987-07-15 | METHOD AND DEVICE FOR CLEANING GOLD. |
| US07/073,509 US4859293A (en) | 1986-07-16 | 1987-07-15 | Process for refining gold and apparatus employed therefor |
| 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 |
| AU75670/87A AU607921B2 (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 JPS6324090A (en) | 1988-02-01 |
| JPH0573836B2 true 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) |
Families Citing this family (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 |
| CA3028584C (en) | 2016-06-24 | 2024-11-19 | Enviroleach Technologies Inc. | Methods, materials and techniques for precious metal recovery |
| US10526682B2 (en) * | 2017-07-17 | 2020-01-07 | 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 |
-
1986
- 1986-07-16 JP JP61167616A patent/JPS6324090A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6324090A (en) | 1988-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4917781A (en) | Process for preparing quaternary ammonium hydroxides | |
| US4071415A (en) | Method of electroplating aluminum and its alloys | |
| NO164064B (en) | IMAGE PROJECTOR. | |
| EP0035667B1 (en) | Trivalent chromium electroplating solution and bath | |
| US4053374A (en) | Chromium electroplating baths | |
| JPH0573836B2 (en) | ||
| JPS6229514B2 (en) | ||
| US4707226A (en) | Process for the dehalogenation of chloroacetic and bromoacetic acid | |
| JP4515804B2 (en) | Method for recovering metallic indium by electrowinning | |
| Pavlović et al. | Formation of bromates at a RuO2TiO2 titanium anode | |
| JPH08100282A (en) | Method for producing nickel hypophosphite | |
| JPS6324089A (en) | Gold electrolytic solution | |
| Willard et al. | The electrolytic oxidation of iodine and of iodic acid | |
| JP2982658B2 (en) | Method of lowering metal concentration in electroplating solution | |
| JP3781694B2 (en) | Method for producing trivalent ruthenium chloride | |
| US6103088A (en) | Process for preparing bismuth compounds | |
| JPS60114585A (en) | Manufacture of glycol | |
| JP2585325B2 (en) | Gold dissolution method | |
| CA1062195A (en) | Method and apparatus for electrolytic production of persulfates | |
| JPH01184293A (en) | Production of iodine and iodate | |
| US4582584A (en) | Metal electrolysis using a semiconductive metal oxide composite anode | |
| JPH11343591A (en) | Silver plating bath, silver/tin alloy plating bath and plating method using the baths | |
| CN115305504A (en) | A kind of method for preparing metal beryllium by molten salt electrolysis | |
| US4115220A (en) | Process for the preparation of high purity antimony | |
| JPH04246187A (en) | Method for recovering iridium |