JPS58741B2 - How to collect money - Google Patents
How to collect moneyInfo
- Publication number
- JPS58741B2 JPS58741B2 JP54056359A JP5635979A JPS58741B2 JP S58741 B2 JPS58741 B2 JP S58741B2 JP 54056359 A JP54056359 A JP 54056359A JP 5635979 A JP5635979 A JP 5635979A JP S58741 B2 JPS58741 B2 JP S58741B2
- Authority
- JP
- Japan
- Prior art keywords
- gold
- polymeric material
- plating
- adsorbed
- adsorption
- 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
Landscapes
- Water Treatment By Sorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Manufacture And Refinement Of Metals (AREA)
Description
【発明の詳細な説明】
本発明は金めつき洗浄排水などに含まれる金をナイロン
などの高分子物質に吸着させて効率よく回収する方法に
関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for efficiently recovering gold contained in gold plating cleaning wastewater by adsorbing it onto a polymeric substance such as nylon.
金めつき工業においては、金めつき洗浄排水中の金は、
濃厚溶液については処理業者に委託して回収しているが
、その濃度が5ppm以下のような希薄溶液が多量に出
る場合には、通常、イオン交換樹脂を用いてその回収を
行っている。In the gold plating industry, gold in gold plating cleaning wastewater is
Concentrated solutions are recovered by entrusting them to a processing company, but when a large amount of dilute solutions with a concentration of 5 ppm or less are produced, ion exchange resins are usually used to recover them.
しかし一般に強塩基性のイオン交換樹脂を用い、これに
金をシアンの錯化合物として吸着させるので、吸着力が
強く、それを脱着させるのに適当な溶離剤はいまだ見出
されておらず、再生脱着が困難であった。However, generally a strongly basic ion exchange resin is used to adsorb gold as a complex compound of cyanide, which has a strong adsorption force, and no eluent suitable for desorbing it has yet been found, and the regeneration process is difficult. It was difficult to put on and take off.
そこで金を吸着したイオン交換樹脂を電気炉、高周波炉
などで焼却して金を回収しているのが現状であった。Currently, gold is recovered by incinerating the ion exchange resin that has adsorbed gold in an electric furnace, high-frequency furnace, etc.
また弱塩基性のイオン交換樹脂を用いて金を吸着させ、
それを溶離させようとする試みもあるが、この場合は、
溶離に水酸化ナトリウム及びシアン化カリウムを含む濃
厚溶液を用いなければならないので、金脱着後の溶液の
処理が難点となった。In addition, gold is adsorbed using a weakly basic ion exchange resin,
Some attempts have been made to elute it, but in this case,
Since a concentrated solution containing sodium hydroxide and potassium cyanide had to be used for elution, processing of the solution after gold desorption became a challenge.
本発明者らは、これらの従来法の難点などを克服するた
め鋭意研究を重ねた結果、酸アミド結合を有する高分子
物質を吸着剤として用いることにより、希薄溶液であっ
ても効率よく金を吸着させることができ、つづいて、容
易に脱着させて金の景縮回収が達成できることを見出し
、この知見に基づいて本発明をなすに至った。As a result of intensive research to overcome the difficulties of these conventional methods, the inventors of the present invention have succeeded in efficiently removing gold even from a dilute solution by using a polymeric material with acid amide bonds as an adsorbent. It has been discovered that gold can be adsorbed and then easily desorbed to achieve reduced gold recovery, and based on this knowledge, the present invention has been accomplished.
酸アミド結合をその少なくとも一部の構成単位として有
する高分子物質に、金をAu(CN)2として含むめっ
き洗浄排水を酸性条件下で接触させて、該排水中に含ま
れる金を該高分子物質に吸着させた後、鍍金を吸着した
高分子物質にアルカリ性水溶液を接触させて、該高分子
物質に吸着された金を脱離させることを特徴とする金め
つき洗浄排水中の金の回収方法を提供するものである。Plating cleaning wastewater containing gold as Au(CN)2 is brought into contact with a polymeric material having acid amide bonds as at least a part of its constituent units under acidic conditions, and the gold contained in the wastewater is transferred to the polymeric material. Recovery of gold from gold plating washing wastewater, which is characterized by adsorbing gold onto a substance and then contacting the polymeric substance adsorbed with plating with an alkaline aqueous solution to desorb the gold adsorbed to the polymeric substance. The present invention provides a method.
本発明に用いられる酸アミド結合をその少なくとも一部
に構成単位として有する高分子物質としては、ナイロン
が好ましい。Nylon is preferable as the polymeric substance having an acid amide bond as a structural unit in at least a portion thereof used in the present invention.
この高分子物質の形態は特に制限はなく、繊維状、ペレ
ット状、膜状なと任意の形態で用いられるが、吸着量の
点からは繊維状が最も好ましい。The form of this polymer substance is not particularly limited and may be used in any form such as fibrous, pellet, or membrane, but fibrous is most preferred from the viewpoint of adsorption amount.
次表に各種の高分子物質を吸着剤として用いた吸着試験
の結果を示す。The following table shows the results of adsorption tests using various polymeric substances as adsorbents.
この試験は、ジシアノ金酸(1−)カリウムとして金を
1100pp含自するpH3の水溶液を用い、吸着剤1
ノを使用し、温度25℃で行った。In this test, an aqueous solution of pH 3 containing 1100 pp of gold as (1-)potassium dicyanoaurate was used, and the adsorbent 1
The test was carried out at a temperature of 25°C.
本発明方法において、排水中の金の吸着は酸性条件下で
行われる。In the method of the invention, adsorption of gold in waste water is carried out under acidic conditions.
ナイロン繊維を1−1用いると水溶液中の全濃度が50
ppm程度であれば、100m1中に含まれる金をほぼ
全量吸着することができる。When using 1-1 nylon fiber, the total concentration in the aqueous solution is 50
If the amount is around ppm, almost all of the gold contained in 100ml can be adsorbed.
通常金めつき洗浄排水中の金は金シアン錯体Au(CN
)2の形で存在しかなり安定性であり、希薄な酸水溶液
中ではシアンガスを発生するおそれはないが、排水のp
Hがあまり低くなりすぎると金シアン錯体が分解するお
それがある31〜カ壮2金の高分子物質への吸着量から
いえばpHは低いほどよい。Gold in gold plating cleaning wastewater is usually gold cyanide complex Au (CN
)2 and is quite stable, and there is no risk of generating cyan gas in a dilute acid aqueous solution, but the p
If H becomes too low, the gold-cyanide complex may be decomposed.In terms of the adsorption amount of 31 to 2 gold to the polymeric substance, the lower the pH, the better.
、したがって酸アミド結合を有する高分子物質に金を吸
着させる際のpHは3程度にとどめるのがよく、好まし
いのはpH3〜5の範囲である。Therefore, when gold is adsorbed onto a polymeric substance having an acid amide bond, the pH is preferably kept at about 3, preferably within the range of pH 3 to 5.
本発明において、金の吸着速度は温度とともに上昇し、
50℃での吸着速度は、25℃での吸着速度の約2倍と
なるが、最終的な吸着量はあまり変わらない。In the present invention, the adsorption rate of gold increases with temperature;
Although the adsorption rate at 50°C is approximately twice that at 25°C, the final amount of adsorption does not change much.
本発明においCは、この。In the present invention, C is this.
Lうに金を吸着させた、酸アミド結合なその少なくとも
一部に構成単位として有する高分子物質を常法に従って
溶離させろことによって金を濃縮して溶出きせることが
できる。The gold can be concentrated and eluted by eluting the polymer substance having at least a part of the acid amide bond as a structural unit, on which gold has been adsorbed, according to a conventional method.
通常、溶離液としては、アノL−hI)外水溶液、好ま
1〜(はpH1O〜14のアルカリ性水溶液を用いろ。Usually, as the eluent, use an aqueous solution of ANO-L-hI, preferably an alkaline aqueous solution with a pH of 1 to 14.
との溶離液中には数白′ないし数カppm程度のシア〕
/イオンが共存すると脱着率が高くなる。The eluent contains several whites to several ppm of shea]
/ When ions coexist, the desorption rate increases.
脱着の際の調度の影響は、吸着の際と同様で、操作温度
なトげろと脱着速度が犬ぎくなる。The influence of the preparation during desorption is similar to that during adsorption; the desorption speed becomes more difficult as the operating temperature rises.
本発明方法は回分式で行うこともできろがカシム式によ
り連続的に行うのがより効率的である。Although the method of the present invention can be carried out batchwise, it is more efficient to carry it out continuously using the Kasim method.
本発明方法によれば比較的金含有量の低い金めつき洗浄
排水から効率よく金を回収することができる。According to the method of the present invention, gold can be efficiently recovered from gold plating washing waste water having a relatively low gold content.
そI〜て吸着剤として用いたナイ[lンなどの高分子4
i質は再生脱着が容易で繰り返して使用できる。The polymer 4, such as nylon, used as an adsorbent.
The i-quality material is easy to regenerate and remove, and can be used repeatedly.
また、−イオン交換樹脂に対して、本発明の吸着剤は安
価なので、吸着処理後にぞれを曽弘旧〜て金を回収する
ように1〜でも十分採算がとれる。Moreover, since the adsorbent of the present invention is cheaper than the ion exchange resin, it is sufficiently profitable to use one or more adsorbents to recover gold after adsorption treatment.
次に本発明を実施例に基づききらに耳組に説明する3、
実施例
直径40μmのナイロン繊維(東し社製、CM1021
)IOPを約3mmの長さに切り、直径2ぼのカラム(
保温用ジャケット付)に充てん1〜た。Next, the present invention will be explained to Kiraniminamigumi based on Examples 3.
) Cut the IOP to a length of about 3 mm, and cut the IOP into a 2-diameter column (
(with thermal jacket).
このカラムに、5ppmの金を含むpH3の金めつき洗
浄排水を温度50℃で、速度30m1/yninで流す
と、溶液が7゜51流出するまで、金は溶液中に検出さ
れなかった。When gold plating wash waste water of pH 3 containing 5 ppm gold was passed through this column at a temperature of 50° C. and a rate of 30 ml/ynin, no gold was detected in the solution until 7°51 of the solution had flowed out.
続いて、このように1.て金を完全に吸着させたカラム
に、pH10で、シアン(KCNとして)1000pp
mを含むシアン水溶液を温度50℃で、流速30m1/
vtinで流すと、300m1流出させるまでに金はす
べて溶出し、その溶出液中の金の平・均濃度は260p
pmであった。Next, like this 1. 1000 ppp of cyanide (as KCN) at pH 10 was added to a column that had completely adsorbed gold.
m at a temperature of 50°C and a flow rate of 30 m1/
When flowing at vtin, all the gold is eluted by the time 300ml flows out, and the average concentration of gold in the eluate is 260p.
It was pm.
Claims (1)
する高分子物質に、金をAu(CN)2−として含むめ
っき洗浄排水を酸性条件下で接触させて該排水中に含ま
れる金を該高分子物質に吸着させた後、鍍金を吸着した
高分子物質にアルカリ性水溶液を接触させて、該高分子
物質に吸着された金を脱離させることを特徴とする金め
つき洗浄排水中の金の回収方法。Plating cleaning wastewater containing gold as Au(CN)2- is brought into contact with a polymeric material having a monoacid amide bond as a part of its constituent units under acidic conditions to remove the gold contained in the wastewater. After adsorbing the plating onto the polymeric material, the polymeric material adsorbed with the plating is brought into contact with an alkaline aqueous solution to desorb the gold adsorbed onto the polymeric material. How to collect money.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54056359A JPS58741B2 (en) | 1979-05-10 | 1979-05-10 | How to collect money |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54056359A JPS58741B2 (en) | 1979-05-10 | 1979-05-10 | How to collect money |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55148732A JPS55148732A (en) | 1980-11-19 |
JPS58741B2 true JPS58741B2 (en) | 1983-01-07 |
Family
ID=13025040
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54056359A Expired JPS58741B2 (en) | 1979-05-10 | 1979-05-10 | How to collect money |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58741B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR200203156Y1 (en) * | 2000-05-04 | 2000-11-15 | 최원석 | The collecting for industrial gold |
KR100723988B1 (en) | 2005-10-31 | 2007-06-04 | (주)이십일세기금속 | The Method of withdrawing Indus trial Gold and Its Device |
WO2019008232A1 (en) * | 2017-07-05 | 2019-01-10 | Weeefiner Oy | A porous body, method for manufacturing it and its use for collecting substance from source material |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3565608A (en) * | 1968-11-12 | 1971-02-23 | Gulf Research Development Co | Recovery of gold from solutions |
US3817745A (en) * | 1971-12-15 | 1974-06-18 | Gaf Corp | Use of polymeric complex for recovering metals |
-
1979
- 1979-05-10 JP JP54056359A patent/JPS58741B2/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3565608A (en) * | 1968-11-12 | 1971-02-23 | Gulf Research Development Co | Recovery of gold from solutions |
US3817745A (en) * | 1971-12-15 | 1974-06-18 | Gaf Corp | Use of polymeric complex for recovering metals |
Also Published As
Publication number | Publication date |
---|---|
JPS55148732A (en) | 1980-11-19 |
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