JPH03153830A - Solvent extraction method of iridium - Google Patents
Solvent extraction method of iridiumInfo
- Publication number
- JPH03153830A JPH03153830A JP29284689A JP29284689A JPH03153830A JP H03153830 A JPH03153830 A JP H03153830A JP 29284689 A JP29284689 A JP 29284689A JP 29284689 A JP29284689 A JP 29284689A JP H03153830 A JPH03153830 A JP H03153830A
- Authority
- JP
- Japan
- Prior art keywords
- iridium
- hydrochloric acid
- soln
- solvent
- oxidizing agent
- 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
- 229910052741 iridium Inorganic materials 0.000 title claims abstract description 57
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims description 15
- 238000000638 solvent extraction Methods 0.000 title claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 74
- 239000000460 chlorine Substances 0.000 claims abstract description 18
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 18
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007800 oxidant agent Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 230000003647 oxidation Effects 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 5
- 239000003960 organic solvent Substances 0.000 claims description 10
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 15
- -1 iridium ions Chemical class 0.000 abstract description 4
- 239000002904 solvent Substances 0.000 abstract 5
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 26
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- MILUBEOXRNEUHS-UHFFFAOYSA-N iridium(3+) Chemical compound [Ir+3] MILUBEOXRNEUHS-UHFFFAOYSA-N 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- XTAZYLNFDRKIHJ-UHFFFAOYSA-N n,n-dioctyloctan-1-amine Chemical compound CCCCCCCCN(CCCCCCCC)CCCCCCCC XTAZYLNFDRKIHJ-UHFFFAOYSA-N 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- DANYXEHCMQHDNX-UHFFFAOYSA-K trichloroiridium Chemical compound Cl[Ir](Cl)Cl DANYXEHCMQHDNX-UHFFFAOYSA-K 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
- 238000002211 ultraviolet spectrum Methods 0.000 description 1
Landscapes
- Extraction Or Liquid Replacement (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、イリジウム含有溶液からイリジウムを溶媒抽
出する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for solvent extraction of iridium from an iridium-containing solution.
（従来技術とその問題点）
従来、イリジウムのように用途の限られた金属について
の抽出分離に関する研究は少ない。(Prior art and its problems) Until now, there has been little research on the extraction and separation of metals such as iridium, which have limited uses.
イリジウムは塩化物水溶液中でクロロ錯陰イオンあるい
はクロロ−アクアク複合錯体として溶存していることか
ら溶媒抽出法としては塩素水で酸化してＴＢＰで抽出し
、水で逆抽出後塩化アンモニウム溶液でアンミン錯化合
物として分離回収する方法やａｌａｍｉｎｅ３３６と３
１０の混合第３級アミン２５％と５ｏｌｖｅｓｓｏ１５
０とケロシンの混合物７５％の抽出剤で塩素ガスを通過
させたイリジウム溶液よりイリジウムを抽出し亜硝酸塩
、ヒドラジン、蓚酸塩等のような還元剤溶液で逆抽出す
る方法がある。Since iridium is dissolved as a chloro complex anion or a chloro-aqueous complex in an aqueous chloride solution, the solvent extraction method is to oxidize it with chlorine water, extract it with TBP, back-extract it with water, and then use ammonium chloride solution to remove the amine. A method of separating and recovering as a complex compound and alamine 336 and 3
10 mixed tertiary amines 25% and 5olvesso15
There is a method of extracting iridium from an iridium solution through which chlorine gas is passed using an extractant containing a mixture of 0 and kerosene at 75%, and then back-extracting it with a solution of a reducing agent such as nitrite, hydrazine, oxalate, etc.
他にＡｌ１ｑｕａｔ３３６を抽出剤とし適当な有機溶媒
で希釈して抽出する方法も提案されている。In addition, a method of extraction using Al1quat336 as an extractant and diluting it with a suitable organic solvent has also been proposed.
しかし、それぞれイリジウムの抽出率が低い等の欠点が
あった。However, each had drawbacks such as a low extraction rate of iridium.
（発明の目的）
本発明は、従来法の欠点を解決するために成されたもの
で、イリジウムを有機溶媒に抽出する際の抽出率を約１
００％とする方法を提供することを目的とする。(Objective of the Invention) The present invention was made to solve the drawbacks of the conventional method, and the extraction rate when extracting iridium into an organic solvent is reduced to about 1.
00%.
（問題点を解決するための手段）
本発明は、イリジウムを含有する塩酸溶液より抽出剤と
して有機溶媒を用いてイリジウムを抽出する方法に於い
て、イリジウムを有機溶媒で抽出する前に該イリジウム
を含有する塩酸溶液の塩酸濃度を調節し、該溶液を加熱
しながら酸化剤を加えて酸化することを特徴とするイリ
ジウムの溶媒抽出法で、前記イリジウムを含有する塩酸
溶液の塩酸濃度がＯ，１〜５規定に調節するイリジウム
の溶媒抽出法であり、前記加熱温度が５０℃以上で、酸
化剤が塩素水で、溶液中の有効塩素が０．０１％以上で
あるイリジウムの溶媒抽出法である。(Means for Solving the Problems) The present invention provides a method for extracting iridium from a hydrochloric acid solution containing iridium using an organic solvent as an extractant. A solvent extraction method for iridium characterized in that the hydrochloric acid concentration of the hydrochloric acid solution containing iridium is adjusted and the solution is oxidized by adding an oxidizing agent while heating the solution, and the hydrochloric acid concentration of the hydrochloric acid solution containing iridium is O. This is a solvent extraction method for iridium in which the heating temperature is adjusted to 50° C. or higher, the oxidizing agent is chlorine water, and the available chlorine in the solution is 0.01% or more. .
イリジウムを有機溶媒に抽出する前に、該イリジウムを
含有する塩酸溶液の塩酸濃度を０． １〜５規定に調節
するのは、０． １規定以下ではイリジウム錯体が安定
性に欠けるためであり、５規定以上ではイリジウムを■
価に酸化しても抽出率が低下するからである。Before extracting iridium into an organic solvent, the hydrochloric acid concentration of the iridium-containing hydrochloric acid solution is adjusted to 0. Adjustment to 1 to 5 regulations is 0. This is because the iridium complex lacks stability when it is less than 1N, and when it is more than 5N, the iridium is
This is because the extraction rate decreases even if oxidized to oxidation.
また、イリジウムの■価を■価に酸化させる反応温度を
５０℃以上に加熱しながら酸化するのは、該イリジウム
が塩酸溶液中で■価に安定させるためで、好ましくは８
０〜９５℃である。In addition, the reason why the reaction temperature for oxidizing iridium to 50° C. or higher is to stabilize the iridium at 50° C. in a hydrochloric acid solution, preferably 8
The temperature is 0 to 95°C.
前記加熱温度が５０℃以下では不安定で■価のイリジウ
ムイオンが■価に還元される恐れがあるからで、■価の
イリジウムイオンは極めて有機溶媒に抽出するのに時間
を要するためであり、加熱温度を１００℃以下とするの
は酸化剤として加える塩素が揮発して十分に酸化させる
ことができなくなるからと上記の塩酸濃度が不安定とな
るからである。This is because if the heating temperature is below 50°C, it is unstable and the iridium ions with a valence of 2 may be reduced to the valence of 2, and the iridium ions with a valence of 2 take a very long time to be extracted into an organic solvent. The reason why the heating temperature is set to 100° C. or lower is that the chlorine added as an oxidizing agent volatilizes, making it impossible to oxidize sufficiently and making the above-mentioned hydrochloric acid concentration unstable.
また、酸化剤として塩素水を加えているのは酸化条件を
定め易く、しかも取り扱いが容易であるからで、イリジ
ウムの■価を■価に酸化させるための有効塩素濃度を０
．０１％以上としているのは加熱温度、イリジウムの■
価イオンの量等の変化に影響されず、完全に■価に酸化
させることができるからである。In addition, chlorine water is added as an oxidizing agent because it is easy to set oxidation conditions and easy to handle.
．． 01% or more is the heating temperature, iridium ■
This is because it is not affected by changes in the amount of valence ions, etc., and can be completely oxidized to valence ions.
以下、本発明に係わる実施例を記載するが、該実施例は
本発明を限定するものではない。Examples related to the present invention will be described below, but the examples are not intended to limit the present invention.
（実施例１）
３価あるいは４価で溶存するｌｒを塩化物水溶液から抽
出剤として０． ｌ Ｋｍｏ ｌ／ｍ’ Ａ Ｉ １
ｑｕａ ｔ ３３６の１．２ジクロロエタン希釈液をも
ちいて抽出した場合の結果を第１図に示す。(Example 1) Trivalent or tetravalent dissolved lr was extracted from an aqueous chloride solution using 0.0. l Kmol l/m' A I 1
The results of extraction using a 1.2 dichloroethane solution of qua t 336 are shown in FIG.
Ｉｒの抽出特性は金属の価数により異なり、Ｉｒ（ＩＶ
）の抽出は広い塩酸濃度範囲で高く、一方Ｉｒ（ＩＩＩ
）の抽出は比較的低く、塩酸濃度の増加と共に著しく低
下する。The extraction characteristics of Ir differ depending on the valence of the metal, and Ir(IV
) extraction is high over a wide hydrochloric acid concentration range, while Ir(III
) extraction is relatively low and decreases significantly with increasing hydrochloric acid concentration.
以上の結果から、効率良＜Ｉｒを抽出するためには、溶
液中のＩｒをＩ ｒ （ＩＶ）として溶存させることが
重要で、酸化剤として塩素水を用い、塩酸溶液中のＩｒ
（Ｉ［）を酸化し、抽出されやすいＩｒ（ＩＶ）の錯体
に変化させた。From the above results, in order to efficiently extract Ir, it is important to dissolve Ir in the solution as Ir (IV), and by using chlorine water as the oxidizing agent, Ir in the hydrochloric acid solution
(I[) was oxidized and converted into a complex of Ir(IV) that is easily extracted.
塩−素水添加後のＩｒの溶存状態の変化をＵＶスペクト
ルで観察した。Changes in the dissolved state of Ir after addition of salt-hydrogen water were observed using UV spectroscopy.
反応温度３６３Ｋ、塩酸濃度３ Ｋ ｍ ｏ Ｉ ／
ｍ ’の条件で酸化を行い、得られた結果を第３図に示
す。Ｉｒ（ＩＶ）の錯体に対応する吸光ピーク位置（３
０５，４２０，４４０，４９０ｎｍ付近）での吸光度の
増大が観察され、Ｉｒ（ＩＩＩ）が塩素により酸化され
ることがわかる。Reaction temperature 363K, hydrochloric acid concentration 3K m o I /
The oxidation was carried out under the conditions of m', and the results obtained are shown in FIG. The absorption peak position (3
05, 420, 440, and 490 nm), indicating that Ir(III) is oxidized by chlorine.
塩素水の添加によるＩｒの溶存状態の変化傾向は塩酸濃
度、反応温度により異なる。The tendency of the dissolved state of Ir to change due to the addition of chlorine water differs depending on the concentration of hydrochloric acid and the reaction temperature.
次いで、抽出剤濃度を１０ ’Ｋｍｏ ｌ／ｍ’ −
定の下で、金属濃度を変化させてＩｒ（ＩＶ）の抽出を
行い、得られた結果を抽出剤と有機相中の抽出された金
属濃度とのモル比として第２図に示す。Then, the extractant concentration was adjusted to 10'Kmol/m'-
Extraction of Ir(IV) was carried out under constant conditions with varying metal concentrations, and the results obtained are shown in FIG. 2 as the molar ratio of the extractant to the extracted metal concentration in the organic phase.
モル比は金属濃度の増加と共に減少し、その値は２に漸
近する。The molar ratio decreases with increasing metal concentration and its value asymptotically approaches 2.
この結果は抽出剤濃度範囲１０−’から４×ｌＯＫｍｏ
ｌ／ｍ３でスロープ解析した結果と一致する。This result shows that the extractant concentration ranges from 10-' to 4 x l OKmo.
This agrees with the results of slope analysis in l/m3.
（実施例２）
イリジウム１００ｍｇ／ｆを含む塩酸溶液の塩酸濃度を
２規定に調節したのち、塩素水を加えて有効塩素濃度を
０．０１％とし、９０℃で６０分間加熱して反応させた
のち、抽出剤として０゜■ｍｏ１／ＩｌのＡ１１ｑｕａ
ｔ３３６／ｌ、２ジクロロエタン１００−と該イリジウ
ム溶液１００ｍ／を分液漏斗に入れ混合して３０分間攪
拌し静置して塩酸溶液相とイリジウムを抽出した有機溶
媒相を分離し、塩酸溶液相中のイリジウムをＩＣＰで分
析したところ検出できなかった。(Example 2) After adjusting the hydrochloric acid concentration of a hydrochloric acid solution containing 100 mg/f of iridium to 2N, chlorine water was added to make the effective chlorine concentration 0.01%, and the mixture was heated at 90°C for 60 minutes to react. Later, A11qua of 0゜■mo1/Il was used as an extractant.
t336/l, 100-2 dichloroethane and 100 m/l of the iridium solution were mixed in a separatory funnel, stirred for 30 minutes, and allowed to stand to separate the hydrochloric acid solution phase and the organic solvent phase from which iridium was extracted. Iridium could not be detected when analyzed by ICP.
（実施例３）
イリジウム１（１’Ｏｍｇ／ｉ’を含む塩酸溶液の塩酸
濃度を５規定に調節したのち、塩素水を加えて有効塩素
濃度を０．０１％とし、５５℃で６０分間加熱して反応
させたのち、抽出剤として０． １ｍｏ１／ｌのＡ１１
ｑｕａｔ３３６／Ｉ、２ジクロロエタン１００−と該イ
リジウム溶液１０〇−を分液漏斗に入れ混合して３０分
間攪拌し静置して塩酸溶液相とイリジウムを抽出した有
機溶媒相を分離し、塩酸溶液相中のイリジウムをＩＣＰ
で分析したところｏ、０８ｒｎｇ検出され、イリジウム
の抽出率は９９．２％であった。(Example 3) After adjusting the hydrochloric acid concentration of a hydrochloric acid solution containing iridium 1 (1'Omg/i') to 5N, add chlorine water to make the effective chlorine concentration 0.01%, and heat at 55°C for 60 minutes. After reaction, 0.1mol/l of A11 was added as an extractant.
quat336/I, 2 dichloroethane 100- and the iridium solution 10- ICP the iridium inside
When analyzed, 0.08 rng was detected, and the iridium extraction rate was 99.2%.
（比較例）
イリジウム１００ｍｇ／Ｉ！を含む塩酸溶液の塩酸濃度
を２規定に調節したのち、塩素水を加えて有効塩素濃度
を０．０１％とし、２０℃で６０分間反応させたのち、
抽出剤として０゜１ｍｏｌ／ｌのＡ１１ｑｕａｔ３３６
／１，２ジクｏロエタン１００−と該イリジウム溶液１
００−を分液漏斗に入れ混合して３０分間攪拌し静置し
て塩酸溶液相とイリジウムを抽出した有機溶媒相を分離
し、塩酸溶液相中のイリジウムをＩＣＰで分析したとこ
ろ０．１６ｍｇ検出され、イリジウムの抽出率は９８．
４％であった。(Comparative example) Iridium 100mg/I! After adjusting the hydrochloric acid concentration of the hydrochloric acid solution containing 2N to 2N, chlorine water was added to make the effective chlorine concentration 0.01%, and after reacting at 20°C for 60 minutes,
0°1 mol/l A11quat336 as extractant
/1,2 dichloroethane 100- and the iridium solution 1
00- was mixed in a separatory funnel, stirred for 30 minutes, left to stand, and the hydrochloric acid solution phase and the organic solvent phase from which iridium was extracted were separated. When the iridium in the hydrochloric acid solution phase was analyzed by ICP, 0.16 mg was detected. The extraction rate of iridium was 98.
It was 4%.
（発明の効果）
以上説明したように、従来イリジウムを■価から■価に
酸化するのに室温で反応させて有機溶媒に抽出していた
がイリジウムの抽出率が十分でなく、本発明の方法によ
ればイリジウムを１００％抽出することが容易となりイ
リジウムという極めて稀少価値の高く、しかも高価な金
属の回収精製に関しての技術の発展に大いに寄与するも
と言えるものである。(Effects of the Invention) As explained above, conventionally, iridium was oxidized from ■ valence to ■ valence by reacting it at room temperature and extracting it into an organic solvent, but the extraction rate of iridium was insufficient, and the method of the present invention According to this method, it is easy to extract 100% of iridium, and it can be said that this method will greatly contribute to the development of technology related to the recovery and purification of iridium, an extremely rare and expensive metal.
第１図は３価および４価のイリジウム塩化物水溶液の各
種塩酸濃度に於いて、抽出剤として０．１ｍｏｌ／Ｉ！
のＡｌ １ｑｕａ ｔ ３３６／ｌ、 ２ジクロロエ
タンを用いて、イリジウムを抽出した場合の結果を示す
図、第２図は抽出剤と有機相中の抽出された金属濃度と
のモル比を示す図、第３図はイリジウムの溶存状態の変
化をＵＶスペクトルで観察した結果を示す図である。Figure 1 shows trivalent and tetravalent iridium chloride aqueous solutions at various hydrochloric acid concentrations of 0.1 mol/I! as an extractant.
Figure 2 shows the results of extracting iridium using Al 1quat 336/l, 2 dichloroethane. Figure 3 is a diagram showing the results of observing changes in the dissolved state of iridium using a UV spectrum.
Claims (3)
有機溶媒を用いてイリジウムを抽出する方法に於いて、
イリジウムを有機溶媒で抽出する前に該イリジウムを含
有する塩酸溶液の塩酸濃度を調節し、該溶液を加熱しな
がら酸化剤を加えて酸化することを特徴とするイリジウ
ムの溶媒抽出法。(1) In a method of extracting iridium from a hydrochloric acid solution containing iridium using an organic solvent as an extractant,
1. A method for solvent extraction of iridium, which comprises adjusting the hydrochloric acid concentration of a hydrochloric acid solution containing iridium before extracting iridium with an organic solvent, and adding an oxidizing agent to the solution while heating it for oxidation.
０．１〜５規定に調節する請求項１に記載のイリジウム
の溶媒抽出法。(2) The method for solvent extraction of iridium according to claim 1, wherein the hydrochloric acid concentration of the iridium-containing hydrochloric acid solution is adjusted to 0.1 to 5 normal.
、溶液中の有効塩素が０．０１％以上である請求項１お
よび２に記載のイリジウムの溶媒抽出法。(3) The method for solvent extraction of iridium according to Claims 1 and 2, wherein the heating temperature is 50° C. or higher, the oxidizing agent is chlorine water, and the available chlorine in the solution is 0.01% or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1292846A JP2805689B2 (en) | 1989-11-10 | 1989-11-10 | Solvent extraction method for iridium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1292846A JP2805689B2 (en) | 1989-11-10 | 1989-11-10 | Solvent extraction method for iridium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03153830A true JPH03153830A (en) | 1991-07-01 |
| JP2805689B2 JP2805689B2 (en) | 1998-09-30 |
Family
ID=17787123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1292846A Expired - Lifetime JP2805689B2 (en) | 1989-11-10 | 1989-11-10 | Solvent extraction method for iridium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2805689B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139876A (en) * | 2005-11-15 | 2007-06-07 | Cosmo Japan:Kk | Supporter for stringed instrument |
| JP2008144269A (en) * | 2006-11-15 | 2008-06-26 | Semiconductor Energy Lab Co Ltd | Method for collecting metal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5183801A (en) * | 1974-12-12 | 1976-07-22 | Rhone Poulenc Ind | Aruminakeitantai hatsukin oyobi irijiumuyorinaru shokubaiseibun no kaishuhoho |
| JPS5316316A (en) * | 1976-06-21 | 1978-02-15 | Nat I Fuoa Metaraajii | Recovering and refining method of iridium |
-
1989
- 1989-11-10 JP JP1292846A patent/JP2805689B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5183801A (en) * | 1974-12-12 | 1976-07-22 | Rhone Poulenc Ind | Aruminakeitantai hatsukin oyobi irijiumuyorinaru shokubaiseibun no kaishuhoho |
| JPS5316316A (en) * | 1976-06-21 | 1978-02-15 | Nat I Fuoa Metaraajii | Recovering and refining method of iridium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007139876A (en) * | 2005-11-15 | 2007-06-07 | Cosmo Japan:Kk | Supporter for stringed instrument |
| JP2008144269A (en) * | 2006-11-15 | 2008-06-26 | Semiconductor Energy Lab Co Ltd | Method for collecting metal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2805689B2 (en) | 1998-09-30 |
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