WO2002020857A1 - Procede de production d'argent de grande purete - Google Patents

Procede de production d'argent de grande purete Download PDF

Info

Publication number
WO2002020857A1
WO2002020857A1 PCT/JP2001/004296 JP0104296W WO0220857A1 WO 2002020857 A1 WO2002020857 A1 WO 2002020857A1 JP 0104296 W JP0104296 W JP 0104296W WO 0220857 A1 WO0220857 A1 WO 0220857A1
Authority
WO
WIPO (PCT)
Prior art keywords
silver
purity
raw material
producing high
high purity
Prior art date
Application number
PCT/JP2001/004296
Other languages
English (en)
Japanese (ja)
Inventor
Yuichiro Shindo
Original Assignee
Nikko Materials Company, Limited
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nikko Materials Company, Limited filed Critical Nikko Materials Company, Limited
Publication of WO2002020857A1 publication Critical patent/WO2002020857A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
    • C22B3/46—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes by substitution, e.g. by cementation
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/04—Obtaining noble metals by wet processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
    • C22B3/065—Nitric acids or salts thereof
    • 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

Definitions

  • the present invention relates to a method for producing high-purity silver, and more particularly, to a method for producing high-purity silver having a purity of 99.999% or more from low-grade silver-containing raw materials at a low light value.
  • high-purity silver is produced from a crude silver raw material by an electrolytic refining method.
  • a lead electrolytic anode slime is used as a starting material
  • a low-grade coarse silver plate obtained by concentrating silver contained in the anode slime is used as an anode
  • a silver nitrate solution containing nitric acid is used as an electrolytic solution
  • the cathode is electrolyzed. It is manufactured by depositing silver on a plate.
  • This coarse silver plate contains about 98 to 99% of silver and other trace impurities such as gold, platinum, palladium, bismuth, copper, iron, and tellurium.
  • the present invention provides a method for solving the above-mentioned problems without using the electrolytic purification method described above. /.
  • An object of the present invention is to provide a method capable of producing the high-purity silver in a simple process and at low cost.
  • the present invention has found that high purity of silver can be achieved by two acid treatments, and provides the following method.
  • a method for producing high-purity silver from a low-grade silver-containing raw material in which the raw material is dissolved with nitric acid, and then hydrochloric acid is added to obtain a salt crystal.
  • For producing high-purity silver characterized by reducing
  • FIG. 1 is an explanatory view of a purification step of high purity silver of the present invention.
  • nitric acid 1.2 equivalents or more of nitric acid is added to a low-grade silver-containing raw material having a grade of 99.9% or less, and the silver-containing raw material is dissolved with nitric acid.
  • the amount of nitric acid to be added is less than 1.2 equivalents, sufficient dissolution cannot be obtained, so that at least 1.2 equivalents is required. At this time, most of the impurities contained in the silver and the raw materials are dissolved.
  • silver chloride crystals 1.2 equivalents or more of hydrochloric acid is added to obtain silver chloride crystals.
  • silver is selectively converted into silver chloride crystals, and the chloride of impurities in the raw material is dissolved in the aqueous solution, and only silver chloride has no solubility and can be separated efficiently.
  • the obtained silver chloride crystal is reduced with hydrogen at 200 ° C. or more to obtain high-purity silver having a purity of 99.999% or more.
  • the temperature is lower than 200 ° C., the reduction efficiency is reduced. Therefore, it is desirable to reduce hydrogen at 200 ° C. or higher.
  • the impurities separated in the steps of dissolving with nitric acid and obtaining silver chloride crystals contain trace amounts of noble metals, but they are usually discarded because their amounts are extremely small. However, it can be concentrated and collected.
  • the hydrochloric acid generated by the reduction step can be reused in the above-mentioned step of silver chloride using hydrochloric acid.
  • the obtained silver chloride crystals were hydrogen reduced at 400 ° C.
  • the yield was 97.8%.
  • High purity silver (after purification) with the impurity content shown in Table 1 was obtained.
  • the hydrochloric acid generated by the reduction step was reused in the above-mentioned step of salting silver with hydrochloric acid.
  • the noble metal in the impurities separated in the steps of dissolving with nitric acid and obtaining silver chloride crystals is usually discarded because it is a very small amount.However, it is concentrated and converted to ammonium chloroplatinate by, for example, an ammonium chloride reaction. It can be recovered by adsorption to graphite.
  • the impurities contained in the high-purity silver obtained in this example were palladium 0.02 ppm, selenium 0.01 ppm, antimony 0.03 ppm ⁇ copper 0.01 ppm , Iron 0.05 ppm, Titanium 0.01 ppm, Platinum 0.0 lp pm, Rhodium 0.01! 11.
  • the sulfur content was 0.03 ppm.
  • the present invention has an excellent effect that high-purity silver of 99.999% or more can be purified in two acid treatment steps without using an electrolytic refining method, and can be manufactured stably and at low cost.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

L'invention concerne un procédé de production d'argent de grande pureté à partir d'une matière première à faible teneur, ledit procédé étant caractérisé en ce qu'il consiste à dissoudre la matière première avec une solution d'acide nitrique, ajouter l'acide chlorhydrique au mélange résultant pour produire des cristaux de chlorure d'argent, et réduire lesdits cristaux. Le procédé permet la production d'argent de grande pureté qui s'élève au moins à 99,999 % sans utiliser le procédé de purification par électrolyse au moyen d'un processus simple et peu coûteux.
PCT/JP2001/004296 2000-09-07 2001-05-23 Procede de production d'argent de grande purete WO2002020857A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-270971 2000-09-07
JP2000270971A JP4842426B2 (ja) 2000-09-07 2000-09-07 高純度銀の製造方法

Publications (1)

Publication Number Publication Date
WO2002020857A1 true WO2002020857A1 (fr) 2002-03-14

Family

ID=18757324

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/004296 WO2002020857A1 (fr) 2000-09-07 2001-05-23 Procede de production d'argent de grande purete

Country Status (2)

Country Link
JP (1) JP4842426B2 (fr)
WO (1) WO2002020857A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106191971A (zh) * 2016-08-19 2016-12-07 南通皋鑫电子股份有限公司 回收高压二极管引脚镀银挂具的方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100610816B1 (ko) 2004-08-02 2006-08-10 한국지질자원연구원 은(銀)분말 제조방법
JP4882125B2 (ja) * 2005-06-20 2012-02-22 Ｄｏｗａエコシステム株式会社 銀回収方法
KR102289961B1 (ko) * 2019-10-14 2021-08-12 단국대학교 천안캠퍼스 산학협력단 염기성 용액 분사 공정을 통해 전도성이 향상된 투명 전도성 전극 필름의 제조 방법
JP7453002B2 (ja) 2020-01-22 2024-03-19 大口電子株式会社 銀の回収方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6345330A (ja) * 1986-08-12 1988-02-26 Nobuaki Terai 金属ハロゲン化物の水素による還元法
JPH10265863A (ja) * 1997-03-27 1998-10-06 Mitsubishi Materials Corp 製錬残渣からの貴金属回収方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS563630A (en) * 1979-06-15 1981-01-14 Inst Obu Niyuukuria Enaajii Re Recovery of metals
JPH10280059A (ja) * 1997-04-10 1998-10-20 Sumitomo Metal Mining Co Ltd 貴金属合金からの金と銀の分離方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6345330A (ja) * 1986-08-12 1988-02-26 Nobuaki Terai 金属ハロゲン化物の水素による還元法
JPH10265863A (ja) * 1997-03-27 1998-10-06 Mitsubishi Materials Corp 製錬残渣からの貴金属回収方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106191971A (zh) * 2016-08-19 2016-12-07 南通皋鑫电子股份有限公司 回收高压二极管引脚镀银挂具的方法

Also Published As

Publication number Publication date
JP4842426B2 (ja) 2011-12-21
JP2002080919A (ja) 2002-03-22

Similar Documents

Publication Publication Date Title
JP3203587B2 (ja) インジウムの回収方法
TWI428451B (zh) 由無鉛廢焊料回收貴重金屬的方法
JPH0382720A (ja) インジウムを回収する方法
JP2002069684A (ja) インジウムの回収方法
WO2002020857A1 (fr) Procede de production d'argent de grande purete
JP4016680B2 (ja) セレン白金族元素含有物の溶解処理方法
JP5327420B2 (ja) 白金の回収方法
JP5676348B2 (ja) ブラスト粉からの白金回収方法
CN110684902B (zh) 一种高铝石油催化剂银捕集提取贵金属的工艺
KR20090106067A (ko) 치기공소 폐금에서 귀금속을 회수하는 방법
JP2009209421A (ja) 高純度銀の製造方法
JP2001348632A (ja) インジウムの回収方法
JP5447824B2 (ja) 亜硝酸ロジウム錯イオン溶液の精製方法と、そのアンモニウム塩の製造方法。
JP2009097024A (ja) ロジウムの精製方法
JP2005054249A (ja) 銅電解アノードスライムの脱銅方法
JP4821486B2 (ja) スズを含有する白金原料の精製方法
JPS6179736A (ja) 白金族金属を回収する方法
JPH02294495A (ja) 超高純度銅を得るための浄液および電解法
CN113584539A (zh) 一种制备金盐溶液及回收金的方法、无氰电镀金的电镀液
JP4087196B2 (ja) ルテニウム及び／又はイリジウムの回収方法
JP2004190133A (ja) セレンテルル白金族含有物の処理方法
JP3666337B2 (ja) パラジウムの回収方法
JPS63183138A (ja) 金属ガリウムの精製方法
JPH11229053A (ja) 高純度金の製造方法
JP2008208438A (ja) インジウムとスズの分離方法

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase