BR8105636A - Processo para separer em sequencia e seletivamente teores de ouro; e metais do grupo da platina;ouro e metais do grupo da platina - Google Patents

Processo para separer em sequencia e seletivamente teores de ouro; e metais do grupo da platina;ouro e metais do grupo da platina

Info

Publication number
BR8105636A
BR8105636A BR8105636A BR8105636A BR8105636A BR 8105636 A BR8105636 A BR 8105636A BR 8105636 A BR8105636 A BR 8105636A BR 8105636 A BR8105636 A BR 8105636A BR 8105636 A BR8105636 A BR 8105636A
Authority
BR
Brazil
Prior art keywords
platinum group
group metals
gold
separer
sequence
Prior art date
Application number
BR8105636A
Other languages
English (en)
Inventor
D Colton
R Lea
J Edwards
Original Assignee
Inco Ltd
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 Inco Ltd filed Critical Inco Ltd
Publication of BR8105636A publication Critical patent/BR8105636A/pt

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G7/00—Compounds of gold
    • C01G7/003—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G55/00—Compounds of ruthenium, rhodium, palladium, osmium, iridium, or platinum
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G55/00—Compounds of ruthenium, rhodium, palladium, osmium, iridium, or platinum
    • C01G55/001—Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange
    • 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
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/262—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds using alcohols or phenols
    • 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
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/302—Ethers or epoxides
    • 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
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/306—Ketones or aldehydes
    • 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
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/32—Carboxylic acids
    • 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
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/34—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing sulfur, e.g. sulfonium
    • 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
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/38—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
    • C22B3/384—Pentavalent phosphorus oxyacids, esters thereof
    • C22B3/3846—Phosphoric acid, e.g. (O)P(OH)3
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
BR8105636A 1980-09-05 1981-09-03 Processo para separer em sequencia e seletivamente teores de ouro; e metais do grupo da platina;ouro e metais do grupo da platina BR8105636A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8028662 1980-09-05

Publications (1)

Publication Number Publication Date
BR8105636A true BR8105636A (pt) 1982-05-18

Family

ID=10515869

Family Applications (2)

Application Number Title Priority Date Filing Date
BR8105636A BR8105636A (pt) 1980-09-05 1981-09-03 Processo para separer em sequencia e seletivamente teores de ouro; e metais do grupo da platina;ouro e metais do grupo da platina
BR8105637A BR8105637A (pt) 1980-09-05 1981-09-03 Processo para lixiviacao de um concentrado que contem metais preciosos; solucao que contem teores de ouro e metais do gurpo de platina;ouro e metais do grupo da platina

Family Applications After (1)

Application Number Title Priority Date Filing Date
BR8105637A BR8105637A (pt) 1980-09-05 1981-09-03 Processo para lixiviacao de um concentrado que contem metais preciosos; solucao que contem teores de ouro e metais do gurpo de platina;ouro e metais do grupo da platina

Country Status (10)

Country Link
US (2) US4397689A (pt)
EP (2) EP0049567B1 (pt)
JP (2) JPS5779135A (pt)
AU (2) AU542195B2 (pt)
BR (2) BR8105636A (pt)
CA (2) CA1177254A (pt)
DE (2) DE3164884D1 (pt)
FI (2) FI71340C (pt)
NO (2) NO156655C (pt)
ZA (2) ZA815733B (pt)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6065730A (ja) * 1983-09-19 1985-04-15 Agency Of Ind Science & Technol 廃触媒からルテニウムを回収する方法
CA1223125A (en) * 1984-06-07 1987-06-23 George P. Demopoulos Direct recovery of precious metals by solvent extraction and selective removal
US4722831A (en) * 1985-08-26 1988-02-02 Asarco Incorporated Process for purifying silver refinery slimes
US4723998A (en) * 1985-11-29 1988-02-09 Freeport Minerals Co Recovery of gold from carbonaceous ores by simultaneous chlorine leach and ion exchange resin adsorption process
ES2008044B3 (es) * 1986-10-13 1990-04-16 Austria Metall Procedimiento hidrometalúrgico para la separación y la concentración de oro, platino y paladio, así como la extracción de selenio a partir del lodo anódico de la electrolísis de cobre y a partir de materias no metálicas similares.
JP2685758B2 (ja) * 1987-08-28 1997-12-03 田中貴金属工業株式会社 ルテニウム中に含有されるオスミウムの除去方法
JPH02254126A (ja) * 1989-03-28 1990-10-12 Tanaka Kikinzoku Kogyo Kk ルテニウムの回収方法
JPH02281697A (ja) * 1989-04-21 1990-11-19 Matsushita Electric Ind Co Ltd 電子機器の筐体
USRE36990E (en) * 1992-02-25 2000-12-19 Zeneca Limited Chemical process for the recovery of metal from an organic complex
GB9303017D0 (en) * 1992-02-25 1993-03-31 Zeneca Ltd Chemical process
US5364452A (en) * 1992-02-25 1994-11-15 Cupertino Domenico C Chemical process for the recovery of metal from an organic complex
JPH0649555A (ja) * 1992-08-04 1994-02-22 N E Chemcat Corp ロジウムの回収方法
JPH06180392A (ja) * 1992-12-15 1994-06-28 Power Reactor & Nuclear Fuel Dev Corp 高レベル放射性廃液からルテニウムを分離回収する方法
JPH0653224U (ja) * 1992-12-31 1994-07-19 川崎重工業株式会社 建設機械用のピラーレスキャビン
JP2887036B2 (ja) * 1993-01-19 1999-04-26 住友金属鉱山株式会社 核分裂生成貴金属の分離・精製方法
FR2705102B1 (fr) * 1993-05-12 1995-08-11 Rhone Poulenc Chimie Procede de traitement de compositions contenant des metaux precieux et autres elements de valeur en vue de leur recuperation.
CN1095164C (zh) * 1994-06-07 2002-11-27 株式会社日立制作所 对多种运作模式进行选择后进行记录/再生的信息存储装置及其控制方法
US5491247A (en) * 1994-11-14 1996-02-13 Elf Atochem North America, Inc. Preparation of a precious metal salt of a nonoxidizing acid by direct reaction
JP3079034B2 (ja) * 1996-05-27 2000-08-21 日鉱金属株式会社 白金の回収方法
JP3079035B2 (ja) * 1996-05-27 2000-08-21 日鉱金属株式会社 金の回収方法
AT405841B (de) * 1997-09-11 1999-11-25 Prior Eng Ag Verfahren zum aufarbeiten von edelmetallhaltigen materialien
GB9918437D0 (en) * 1999-08-05 1999-10-06 Anglo American Platinum Corp Separation of platinium group metals
DE10000274C1 (de) * 2000-01-05 2001-05-03 Heraeus Gmbh W C Verfahren zur Gewinnung von Osmium und Ruthenium aus Edelmetallkonzentraten
DE10000275C1 (de) * 2000-01-05 2001-05-03 Heraeus Gmbh W C Verfahren zur Abtrennung von Ruthenium aus Edelmetall-Lösungen
DE10392375T5 (de) * 2002-03-15 2005-06-30 Mitsubishi Materials Corp. Abtrennverfahren für Elemente der Platingruppe
US6827837B2 (en) * 2002-11-22 2004-12-07 Robert W. Halliday Method for recovering trace elements from coal
JP3741117B2 (ja) * 2003-09-26 2006-02-01 住友金属鉱山株式会社 白金族元素の相互分離方法
WO2005083131A1 (ja) * 2004-02-27 2005-09-09 National Institute Of Advanced Industrial Science And Technology パラジウムの抽出剤及びパラジウムの分離回収方法
JP4188365B2 (ja) * 2005-12-05 2008-11-26 日鉱金属株式会社 ロジウムの回収方法
WO2007080648A1 (ja) * 2006-01-13 2007-07-19 Asaka Riken Co., Ltd. 貴金属の分離回収方法
JP4268646B2 (ja) 2007-03-30 2009-05-27 日鉱金属株式会社 ロジウムの回収方法
JP5007983B2 (ja) * 2007-06-26 2012-08-22 独立行政法人産業技術総合研究所 白金族金属の分離試薬及びそれを用いた白金族金属の分離回収方法
DE102008006796A1 (de) 2008-01-30 2009-08-27 W.C. Heraeus Gmbh Verfahren zum Gewinnen von Ruthenium aus Ruthenium oder Rutheniumoxide enthaltenden Materialien oder rutheniumhaltigen Edelmetall-Erzkonzentraten
US20110083531A1 (en) * 2008-02-29 2011-04-14 Australian Nuclear Science And Technology Organisation Selective gold extraction from copper anode slime with an alcohol
KR100876682B1 (ko) * 2008-06-24 2009-01-07 한국지질자원연구원 귀금속 용해장치
JP5004103B2 (ja) * 2009-01-29 2012-08-22 Ｊｘ日鉱日石金属株式会社 Ｔｂｐ中のイリジウムを逆抽出する方法。
US7935173B1 (en) 2010-07-23 2011-05-03 Metals Recovery Technology Inc. Process for recovery of precious metals
AU2012201510B2 (en) * 2011-03-18 2013-03-28 Jx Nippon Mining & Metals Corporation Method of recovering gold from dilute gold solution
JP5767951B2 (ja) * 2011-11-29 2015-08-26 Jx日鉱日石金属株式会社 イリジウムの回収方法
CA2857687C (en) 2011-12-02 2019-07-09 Stillwater Mining Company Quantitative precious metals recovery in the presence of interfering metals, salts, and ions
WO2014062289A1 (en) 2012-10-19 2014-04-24 Kennecott Utah Copper Llc Process for the recovery of gold form anode slimes
WO2014144805A1 (en) * 2013-03-15 2014-09-18 Anderson, Brian R. Platinum group metal refining
JP6320026B2 (ja) * 2013-08-05 2018-05-09 三菱ケミカル株式会社 金属回収方法
RU2542181C1 (ru) * 2013-08-06 2015-02-20 Федеральное государственное бюджетное учреждение науки Институт химии и технологии редких элементов и минерального сырья им. И.В. Тананаева Кольского научного центра Российской академии наук (ИХТРЭМС КНЦ РАН) Способ извлечения золота из солянокислого раствора
KR101768694B1 (ko) * 2015-09-23 2017-08-16 롯데케미칼 주식회사 폐유기용매의 정제 방법
CN106244820A (zh) * 2016-08-29 2016-12-21 金川集团股份有限公司 一种氯压快速溶解复杂稀贵金属精矿的方法
US10648062B1 (en) 2017-03-23 2020-05-12 George Meyer Strategic metal and mineral element ore processing using mixing and oxidant treatment
RU2674371C1 (ru) * 2017-11-03 2018-12-07 Общество с ограниченной ответственностью "Сольвекс" Экстрагент на основе частично фторированного триалкиламина и способ извлечения металлов и кислот из водно-солевых растворов
CN109055774B (zh) * 2018-09-13 2020-08-18 陈永福 一种从含有铂族金属离子的溶液中分离铂、钌和其它铂族金属氢氧化物的方法
CN110694300B (zh) * 2019-10-23 2021-08-27 金川集团股份有限公司 一种铂钯高效萃取分离系统及其萃取分离的方法
US11319613B2 (en) 2020-08-18 2022-05-03 Enviro Metals, LLC Metal refinement

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB260451A (en) * 1926-01-11 1926-11-04 Arthur Gordon Improvements in the recovery and refining of precious metals
US2049488A (en) * 1933-12-23 1936-08-04 Standard Brands Inc Extraction of osmium from ores and minerals
US2945757A (en) * 1956-11-02 1960-07-19 Universal Oil Prod Co Recovery of noble metals from catalytic composites
DE1149912B (de) * 1960-12-27 1963-06-06 Licentia Gmbh Verfahren zur Herstellung von Gold mit einem Reinheitsgrad von mindestens 99,9999%
GB1090294A (en) * 1963-09-19 1967-11-08 Laporte Chemical Recovery of palladium, platinum and gold
US3238038A (en) * 1964-08-07 1966-03-01 Zareba Corp Ltd Precious metal recovery
FR1518305A (fr) * 1966-04-14 1968-03-22 Ajinomoto Kk Procédé de récupération du rhodium à partir d'un mélange provenant d'une réaction catalysée par le rhodium
ZA725490B (en) * 1972-08-10 1973-09-26 Swarsab Mining Improvements in or relating to the separation and purification of platinum group metals and gold
US3920789A (en) * 1972-08-10 1975-11-18 Swarsab Mining Separation of pgm's from each other and from gold
US3856912A (en) * 1973-05-03 1974-12-24 Universal Oil Prod Co Recovery of platinum from deactivated catalysts
GB1495931A (en) 1973-12-07 1977-12-21 Matthey Rustenburg Refines Refining of metals
GB1497535A (en) 1973-12-13 1978-01-12 Matthey Rustenburg Refines Separation of palladium
GB1497534A (en) * 1973-12-13 1978-01-12 Matthey Rustenburg Refines Refining of metals
GB1517270A (en) 1974-06-12 1978-07-12 Johnson Matthey Co Ltd Recovery of precious metals from exhaust catalysts
ZA745109B (en) 1974-08-09 1976-03-31 Nat Inst Metallurg The separation of platinum group metals and gold
US4002470A (en) 1974-12-10 1977-01-11 The Japan Carlit Co., Ltd. Process for recovering ruthenium
US4188362A (en) * 1975-01-29 1980-02-12 National Institute For Metallurgy Process for the treatment of platinum group metals and gold
US3935006A (en) * 1975-03-19 1976-01-27 The United States Of America As Represented By The Secretary Of The Interior Process for eluting adsorbed gold and/or silver values from activated carbon
ZA752093B (en) 1975-04-03 1976-03-31 Swarsab Mining The separation and/or purification of precious metals
ZA775358B (en) * 1977-09-06 1979-04-25 Nat Inst Metallurg The recovery and purification of rhodium
GB2013644B (en) 1978-01-17 1982-09-22 Matthey Rustenburg Refines Solvent extraction
GB2065092B (en) 1979-12-17 1983-12-14 Matthey Rustenburg Refines Solvent extraction of platinum group metals

Also Published As

Publication number Publication date
NO156655B (no) 1987-07-20
EP0048103A1 (en) 1982-03-24
JPS5779135A (en) 1982-05-18
NO156655C (no) 1987-10-28
EP0048103B1 (en) 1984-07-18
NO157382C (no) 1988-03-09
AU542195B2 (en) 1985-02-14
CA1177254A (en) 1984-11-06
US4390366A (en) 1983-06-28
EP0049567A1 (en) 1982-04-14
FI812734L (fi) 1982-03-06
FI71341C (fi) 1986-12-19
NO813018L (no) 1982-03-08
AU538364B2 (en) 1984-08-09
AU7434281A (en) 1982-03-11
JPS5782125A (en) 1982-05-22
FI71340C (fi) 1986-12-19
ZA815735B (en) 1982-08-25
ZA815733B (en) 1982-08-25
US4397689A (en) 1983-08-09
FI812733L (fi) 1982-03-06
EP0049567B1 (en) 1984-05-30
NO157382B (no) 1987-11-30
FI71341B (fi) 1986-09-09
DE3164884D1 (en) 1984-08-23
FI71340B (fi) 1986-09-09
NO813017L (no) 1982-03-08
DE3163890D1 (en) 1984-07-05
BR8105637A (pt) 1982-05-18
AU7473381A (en) 1982-03-11
CA1178063A (en) 1984-11-20
JPH0130896B2 (pt) 1989-06-22
JPH0240614B2 (pt) 1990-09-12

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