EP0097842B1 - Verfahren zur Gewinnung von Edelmetallen aus Lösungen - Google Patents

Verfahren zur Gewinnung von Edelmetallen aus Lösungen Download PDF

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Publication number
EP0097842B1
EP0097842B1 EP83105497A EP83105497A EP0097842B1 EP 0097842 B1 EP0097842 B1 EP 0097842B1 EP 83105497 A EP83105497 A EP 83105497A EP 83105497 A EP83105497 A EP 83105497A EP 0097842 B1 EP0097842 B1 EP 0097842B1
Authority
EP
European Patent Office
Prior art keywords
tellurium
solutions
noble metals
rhodium
metals
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
Application number
EP83105497A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0097842A2 (de
EP0097842A3 (en
Inventor
Hermann Dr. Dipl.-Chem. Renner
Karlheinz Kleiss
Rainer Dr. Dipl.-Chem. Schlodder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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 Degussa GmbH filed Critical Degussa GmbH
Priority to AT83105497T priority Critical patent/ATE21706T1/de
Publication of EP0097842A2 publication Critical patent/EP0097842A2/de
Publication of EP0097842A3 publication Critical patent/EP0097842A3/de
Application granted granted Critical
Publication of EP0097842B1 publication Critical patent/EP0097842B1/de
Expired legal-status Critical Current

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
    • C22B11/00—Obtaining noble metals
    • C22B11/04—Obtaining noble metals by wet processes

Definitions

  • the invention relates to a process for the extraction of precious metals from dilute aqueous or non-aqueous solutions which contain salts of base metals and / or other low-volatility inorganic or organic compounds.
  • the precious metals that can be extracted include silver, gold and the platinum metals.
  • aqueous and non-aqueous solutions occur in many areas, the precious metal content of which has to be obtained with the greatest possible separation of additional fiber present, such as base metal salts, neutral salts or low-volatile organic compounds.
  • the dissolved precious metals can be precipitated from aqueous or water-miscible solutions by reduction to the elemental state and can be sent to the further processing known per se.
  • This reduction and thus the extraction of the noble metal concentrates can be carried out by means of electric current, by means of base metals such as zinc, iron or aluminum, or by means of reducing compounds such as hydrazine or sodium boranate.
  • this reduction method has shortcomings, such as the often incomplete precipitation, the introduction of additional metals which pollute wastewater and the reduction of the copper, which is usually present in considerable quantities, the precipitation of base metal hydroxides, and the formation of inflammable hydrogen gas.
  • the reduction reactions cannot usually be carried out in organic solutions. For organic solutions, especially for liquid waste from homogeneous catalytic processes in oxo synthesis, combustion and pyrolysis processes have been proposed for converting the partly highly diluted precious metals contained therein into concentrates.
  • the noble metals are precipitated by adding elemental tellurium or reducible tellurium compounds to the solution at temperatures of 100 to 250 ° C. and the precipitate is worked up in a known manner.
  • the addition of the elemental tellurium or the reducible tellurium compounds is advantageously carried out at temperatures from 120 to 200 ° C., in the case of solutions with low boiling points of the organic solvents and in aqueous solutions preferably in closed pressure containers.
  • the low-boiling solvent e.g. to be replaced on the distillation route by a higher-boiling one.
  • elemental tellurium or reducible tellurium compounds in Ge Contrary to the known methods and in contrast to the known sulfur and selenium are precipitants for precious metals from dilute solutions, which are highly effective in terms of precious metal yields, by the general applicability in both aqueous and organic solutions, and by the excellent selectivity between Precious metals and base elements, which include copper, stand out.
  • the resulting precipitates which contain the noble metals elementally or in the form of tellurides, can be known in a known manner, e.g. can be worked up by roasting processes or by wet chemistry.
  • the recovered tellurium or the tellurium-containing fraction can always be added to the precipitation process again, so that the tellurium consumption is very low, apart from the low drag-out losses.
  • the tellurium thus represents a regenerable cementing agent.
  • Tellurium has the further advantage that it is practically not absorbed by the organic waste solutions, for example oxo synthesis, so that the organic solvents freed from noble metal can possibly be burned without hesitation.
  • the process according to the invention can be used both for aqueous noble metal solutions which may also contain further cations and anions, such as halides, cyanides, sulfates, thiosulfates or phosphates, and for organic solvents, for example alcohols, aldehydes, chlorinated hydrocarbons or organophosphorus compounds can contain.
  • aqueous noble metal solutions which may also contain further cations and anions, such as halides, cyanides, sulfates, thiosulfates or phosphates
  • organic solvents for example alcohols, aldehydes, chlorinated hydrocarbons or organophosphorus compounds can contain.
  • the amount of tellurium added depends primarily on the precious metal content of the solutions. It can be determined by simple experiments.
  • the filtrate contains only 1 ppm rhodium.
  • the yield of rhodium is more than 99% by weight.
  • the tellurium content in the filtrate is 35 ppm.
  • the filtrate still contains 2 ppm rhodium.
  • the yield of rhodium is more than 98% by weight.
  • the filtrate still contains 2 ppm rhodium.
  • the yield of rhodium is thus 98% by weight.
  • the filtrate still contains 3 ppm rhodium.
  • the yield of rhodium is more than 99% by weight.
  • the metal contents (mg / I) before and after the treatment were:
  • the silver content in the filtrate is 1 mg / I.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
EP83105497A 1982-06-24 1983-06-03 Verfahren zur Gewinnung von Edelmetallen aus Lösungen Expired EP0097842B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105497T ATE21706T1 (de) 1982-06-24 1983-06-03 Verfahren zur gewinnung von edelmetallen aus loesungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3223501 1982-06-24
DE3223501A DE3223501C1 (de) 1982-06-24 1982-06-24 Verfahren zur Gewinnung von Edelmetallen aus Loesungen

Publications (3)

Publication Number Publication Date
EP0097842A2 EP0097842A2 (de) 1984-01-11
EP0097842A3 EP0097842A3 (en) 1984-12-05
EP0097842B1 true EP0097842B1 (de) 1986-08-27

Family

ID=6166679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83105497A Expired EP0097842B1 (de) 1982-06-24 1983-06-03 Verfahren zur Gewinnung von Edelmetallen aus Lösungen

Country Status (11)

Country Link
US (1) US4687514A (enrdf_load_stackoverflow)
EP (1) EP0097842B1 (enrdf_load_stackoverflow)
JP (1) JPS5916938A (enrdf_load_stackoverflow)
AR (1) AR229963A1 (enrdf_load_stackoverflow)
AT (1) ATE21706T1 (enrdf_load_stackoverflow)
BR (1) BR8303257A (enrdf_load_stackoverflow)
CA (1) CA1204597A (enrdf_load_stackoverflow)
DE (2) DE3223501C1 (enrdf_load_stackoverflow)
ES (1) ES8403974A1 (enrdf_load_stackoverflow)
PT (1) PT76914B (enrdf_load_stackoverflow)
ZA (1) ZA834535B (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0565800A2 (en) * 1991-12-31 1993-10-20 Plurichemie Anstalt Process for the recovery of noble metals and tertiary phosphines
DE4200844C1 (enrdf_load_stackoverflow) * 1992-01-15 1993-03-11 Degussa Ag, 6000 Frankfurt, De
JPH0649555A (ja) * 1992-08-04 1994-02-22 N E Chemcat Corp ロジウムの回収方法
GB0025502D0 (en) * 2000-10-18 2000-11-29 Johnson Matthey Plc Metal scavenging
ES2347910T3 (es) 2005-09-27 2010-11-25 W.C. Heraeus Gmbh Procedimiento y dispositivo para el tratamiento de materiales que contienen metales nobles.
DE102009001230A1 (de) 2009-02-27 2010-09-02 Evonik Oxeno Gmbh Verfahren zur Abtrennung und teilweiser Rückführung von Übergangsmetallen bzw. deren katalytisch wirksamen Komplexverbindungen aus Prozessströmen
KR101637622B1 (ko) * 2009-05-14 2016-07-07 유미코르 폐기 균일촉매로부터 귀금속의 회수 방법
DE102011016860A1 (de) 2011-04-13 2012-10-18 Umicore Ag & Co. Kg Verfahren zur Bereitstellung edelmetallhaltiger Stoffgemische für die Rückgewinnung von Edelmetallen
CN104561576B (zh) 2013-10-11 2017-10-27 贺利氏贵金属有限责任两合公司 从长链烃类、焦油、油类中回收贵金属的方法
JP2021031728A (ja) * 2019-08-23 2021-03-01 国立大学法人東京工業大学 貴金属の回収方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA620782A (en) * 1961-05-23 M. Kulifay Stanley Method for the preparation of inorganic compounds
US1617353A (en) * 1925-02-12 1927-02-15 Walter O Snelling Extraction of gold from dilute solutions
US3026175A (en) * 1958-09-22 1962-03-20 Monsanto Chemicals Method for the preparation of tellurides and selenides
FI55684C (fi) * 1975-04-03 1979-09-10 Outokumpu Oy Hydrometallurgiskt foerfarande foer aotervinning av vaerdeaemnen ur anodslam fraon elektrolytisk raffinering av koppar
CA1137275A (en) * 1977-05-16 1982-12-14 Martin B. Dines Chalcogenides of groups viii and viib
DE2911193C2 (de) * 1979-03-22 1981-12-17 W.C. Heraeus Gmbh, 6450 Hanau Verfahren zur Wiedergewinnung von Rhodium

Also Published As

Publication number Publication date
DE3365627D1 (en) 1986-10-02
DE3223501C1 (de) 1985-12-12
EP0097842A2 (de) 1984-01-11
BR8303257A (pt) 1984-02-07
ES523500A0 (es) 1984-04-01
ES8403974A1 (es) 1984-04-01
PT76914A (de) 1983-07-01
JPS5916938A (ja) 1984-01-28
PT76914B (de) 1986-01-24
AR229963A1 (es) 1984-01-31
EP0097842A3 (en) 1984-12-05
US4687514A (en) 1987-08-18
ATE21706T1 (de) 1986-09-15
ZA834535B (en) 1984-03-28
JPH0233778B2 (enrdf_load_stackoverflow) 1990-07-30
CA1204597A (en) 1986-05-20

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