EP0609507B1 - Elektrolytisches Verfahren zur Gewinnung von Platin hoher Reinheit aus verunreinigtem Platin - Google Patents

Elektrolytisches Verfahren zur Gewinnung von Platin hoher Reinheit aus verunreinigtem Platin Download PDF

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Publication number
EP0609507B1
EP0609507B1 EP93118981A EP93118981A EP0609507B1 EP 0609507 B1 EP0609507 B1 EP 0609507B1 EP 93118981 A EP93118981 A EP 93118981A EP 93118981 A EP93118981 A EP 93118981A EP 0609507 B1 EP0609507 B1 EP 0609507B1
Authority
EP
European Patent Office
Prior art keywords
platinum
process according
hydrochloric acid
utilised
cathode
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 - Lifetime
Application number
EP93118981A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0609507A1 (de
Inventor
Sigrid Dr. Herrmann
Uwe Dr.-Ing. Landau
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.)
Schott AG
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
Schott Glaswerke AG
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 Carl Zeiss AG, Schott Glaswerke AG filed Critical Carl Zeiss AG
Publication of EP0609507A1 publication Critical patent/EP0609507A1/de
Application granted granted Critical
Publication of EP0609507B1 publication Critical patent/EP0609507B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/20—Electrolytic production, recovery or refining of metals by electrolysis of solutions of noble metals

Definitions

  • the present invention relates to an electrolytic process for obtaining high purity platinum from concentrated hydrochloric acid solutions from the contaminated platinum.
  • these platinum scrap must now be refined, for example to provide purities of 99.95% platinum for device platinum or 99.99% platinum for thermocouples, as required.
  • certain orders of magnitude of certain contaminants must be observed.
  • Refined platinum can be refined by multiple precipitation of the platinum as ammonium platinum chloride. Pt ⁇ H2 [PtCl6] ⁇ (NH4) 2 [PtCl6] ⁇ Pt
  • the invention was therefore based on the object of providing a process for the production of platinum of high purity, in which the precious and base metals are separated from contaminated platinum in a short time with minimal losses and with little labor using small apparatus.
  • the platinum metal solutions have a content of 50 to 700 g / l and total impurities of ⁇ 5000 ppm.
  • Hydrochloric acid platinum metal solutions preferably hexachloroplatinic acid
  • 6 to 8 N hydrochloric acid preferably 6 N hydrochloric acid
  • the method according to the invention can thus be carried out in several stages depending on the purity of the platinum required.
  • the complex bound ions dissociate, migrate through the cation exchange membrane and are deposited on the cathode.
  • the deposited precipitate also contains small amounts of Pt. This precipitate is mechanically removed from the cathode and processed separately.
  • the inventive method can be refined 1 kg of platinum within 48 h.
  • a hydrochloric acid platinum solution with the following impurities (concentration information based on platinum) Ir 1020 ppm Rh 630 ppm Pd 440 ppm Au 120 ppm Cu 250 ppm Fe 280 ppm Ni 230 ppm Sb 100 ppm Pb 80 ppm Al 80 ppm and a platinum content of 250 g / l (pH ⁇ 1) is electrolyzed in an electrolysis cell, the cathode and anode space are divided by a cation exchange membrane, at a voltage of 4.5 V and a current density of 9 A / dm.
  • the base metals are depleted to ⁇ 20 ppm, the iridium, rhodium and gold content is reduced by 50%, the palladium content by 20%.
  • the platinum solution which was refined according to Example 1, is left in the electrolysis cell, the cathode liquid is replaced by freshly prepared 6 N hydrochloric acid.
  • the anode liquid is diluted to a platinum content of 120 g / l
EP93118981A 1992-12-18 1993-11-25 Elektrolytisches Verfahren zur Gewinnung von Platin hoher Reinheit aus verunreinigtem Platin Expired - Lifetime EP0609507B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4243699A DE4243699C1 (de) 1992-12-18 1992-12-18 Elektrolytisches Verfahren zur Gewinnung von Platin hoher Reinheit aus verunreinigtem Platin
DE4243699 1992-12-18

Publications (2)

Publication Number Publication Date
EP0609507A1 EP0609507A1 (de) 1994-08-10
EP0609507B1 true EP0609507B1 (de) 1996-03-27

Family

ID=6476277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93118981A Expired - Lifetime EP0609507B1 (de) 1992-12-18 1993-11-25 Elektrolytisches Verfahren zur Gewinnung von Platin hoher Reinheit aus verunreinigtem Platin

Country Status (9)

Country Link
US (1) US5393389A (fi)
EP (1) EP0609507B1 (fi)
JP (1) JP3286823B2 (fi)
AT (1) ATE136066T1 (fi)
CA (1) CA2111793C (fi)
DE (2) DE4243699C1 (fi)
FI (1) FI100607B (fi)
RU (1) RU2093607C1 (fi)
ZA (1) ZA938994B (fi)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19829274C2 (de) * 1998-07-01 2002-06-20 Otb Oberflaechentechnik Berlin Verfahren zur Rückgewinnung von Edelmetallen
JP4607303B2 (ja) * 2000-09-13 2011-01-05 株式会社フルヤ金属 金属電極から白金族金属を回収する方法
US7255798B2 (en) * 2004-03-26 2007-08-14 Ion Power, Inc. Recycling of used perfluorosulfonic acid membranes
DE102006056017B4 (de) * 2006-11-23 2016-02-18 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Rückgewinnung von Edelmetallen

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB157785A (en) * 1919-12-19 1922-04-10 Eulampiu Slatineanu Electrolytic process and apparatus for the separation of platinum from other metals contained in platiniferous materials
DE594408C (de) * 1928-10-13 1934-03-16 Degussa Verfahren zum Raffinieren von Platin
US3891741A (en) * 1972-11-24 1975-06-24 Ppg Industries Inc Recovery of fission products from acidic waste solutions thereof
US4382845A (en) * 1981-08-10 1983-05-10 Chevron Research Company Selective electrowinning of palladium
EG19633A (en) * 1983-12-22 1995-08-30 Dynamit Nobel Ag Process for chronologically staggered release of electronic explosive detonating device
AU600666B2 (en) * 1985-04-25 1990-08-23 Chlorine Engineers Corp. Ltd. Electrolytic dissolution and recovery of noble metals
CA1322855C (en) * 1986-07-16 1993-10-12 Mamoru Hirako Process for refining gold and apparatus employed therefor
JPH0238536A (ja) * 1988-07-29 1990-02-07 Tanaka Kikinzoku Kogyo Kk イリジウム酸性溶液中の貴金属分離法

Also Published As

Publication number Publication date
JP3286823B2 (ja) 2002-05-27
CA2111793C (en) 2003-05-13
US5393389A (en) 1995-02-28
FI935661A (fi) 1994-06-19
DE4243699C1 (de) 1994-02-10
ATE136066T1 (de) 1996-04-15
FI100607B (fi) 1998-01-15
EP0609507A1 (de) 1994-08-10
DE59302052D1 (de) 1996-05-02
RU2093607C1 (ru) 1997-10-20
FI935661A0 (fi) 1993-12-16
CA2111793A1 (en) 1994-06-19
JPH06280074A (ja) 1994-10-04
ZA938994B (en) 1994-08-03

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