GB993192A - Electrolytic refining of silicon and germanium - Google Patents

Electrolytic refining of silicon and germanium

Info

Publication number
GB993192A
GB993192A GB9363/63A GB936363A GB993192A GB 993192 A GB993192 A GB 993192A GB 9363/63 A GB9363/63 A GB 9363/63A GB 936363 A GB936363 A GB 936363A GB 993192 A GB993192 A GB 993192A
Authority
GB
United Kingdom
Prior art keywords
metal
alloy
germanium
silicon
alkali
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
GB9363/63A
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.)
General Trustee Co Inc
Original Assignee
General Trustee Co Inc
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 General Trustee Co Inc filed Critical General Trustee Co Inc
Publication of GB993192A publication Critical patent/GB993192A/en
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
    • C22B41/00—Obtaining germanium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/02—Silicon
    • C01B33/037—Purification
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/33—Silicon
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
    • C25C3/34—Electrolytic production, recovery or refining of metals by electrolysis of melts of metals not provided for in groups C25C3/02 - C25C3/32
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/005—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells of cells for the electrolysis of melts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Silicon Compounds (AREA)

Abstract

Silicon or germanium is purified by passing D.C. between an anode in contact with a fused salt bath containing an oxide of the metal to be purified and a fluoride and a cathode in contact with another fused salt bath containing a fluoride, the baths being separated by a molten alloy of the metal being purified and a nobler metal, whereby the oxide is reduced to metal and deposited in the alloy and metal from the alloy is deposited in a purified state on the cathode. The catholyte may be (1) an alkali metal cryolite or a mixture of such cryolites with or without an alkali metal or an alkaline earth metal fluoride or a mixture of such fluorides; (2) one or more alkali or alkaline earth metal fluorides; (3) one or more alkali or alkaline earth metal chlorides with one or more alkali or alkaline earth metal fluorides or fluosilicates; while the anolyte may be as in (1) and (2) above together with an oxide of the metal being refined. For silicon refining at a bath temperature of 1000 DEG C. the catholyte also may contain silica and the molten alloy intermediate electrode is a copper-silicon alloy containing 16% silicon by weight. For germanium refining at a bath temperature of 930 DEG C. the alloy used is a silver-germanium or copper-germanium alloy containing up to 50% germanium by weight. The cell used is divided by a wall which dips into the molten alloy intermediate electrode and rotatably supports a stirrer which rotates in the alloy about an axis arranged vertically within the wall. Specification 989,452 is referred to.
GB9363/63A 1962-03-14 1963-03-08 Electrolytic refining of silicon and germanium Expired GB993192A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US179726A US3219561A (en) 1962-03-14 1962-03-14 Dual cell refining of silicon and germanium
US179725A US3254010A (en) 1962-03-14 1962-03-14 Refining of silicon and germanium

Publications (1)

Publication Number Publication Date
GB993192A true GB993192A (en) 1965-05-26

Family

ID=26875592

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9363/63A Expired GB993192A (en) 1962-03-14 1963-03-08 Electrolytic refining of silicon and germanium
GB9362/63A Expired GB989452A (en) 1962-03-14 1963-03-08 Electrolytic refining of silicon and germanium

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB9362/63A Expired GB989452A (en) 1962-03-14 1963-03-08 Electrolytic refining of silicon and germanium

Country Status (5)

Country Link
US (2) US3219561A (en)
CH (2) CH410441A (en)
DE (2) DE1217077B (en)
GB (2) GB993192A (en)
NL (2) NL290208A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH426279A (en) * 1965-06-15 1966-12-15 Fiduciaire Generale S A Electrolytic cell for the manufacture of silicon
US3983012A (en) * 1975-10-08 1976-09-28 The Board Of Trustees Of Leland Stanford Junior University Epitaxial growth of silicon or germanium by electrodeposition from molten salts
US4142947A (en) * 1977-05-12 1979-03-06 Uri Cohen Electrodeposition of polycrystalline silicon from a molten fluoride bath and product
FR2480796A1 (en) * 1980-04-21 1981-10-23 Extramet Sarl High purity silicon deposit formation - by electrolytic deposition from alkali (ne earth) metal halide melt contg. dissolved silicon
US4448651A (en) * 1982-06-10 1984-05-15 The United States Of America As Represented By The United States Department Of Energy Process for producing silicon
NO156172C (en) * 1984-02-13 1987-08-12 Ila Lilleby Smelteverker PROCEDURE FOR THE PREPARATION OF PURIFIED SILICONE BY ELECTROLYTIC REFINING.
NO20063072L (en) * 2006-03-10 2007-09-11 Elkem As Method for electrolytic refining of metals
EP1999286B1 (en) * 2006-03-10 2017-04-19 Elkem AS Method for electrolytic production and refining of silicon
US7901561B2 (en) * 2006-03-10 2011-03-08 Elkem As Method for electrolytic production and refining of metals
WO2008156372A2 (en) 2007-06-18 2008-12-24 Rec Scanwafer As Method for recovering elemental silicon from cutting remains
US8460535B2 (en) * 2009-04-30 2013-06-11 Infinium, Inc. Primary production of elements
CA2762941A1 (en) 2009-05-26 2010-12-02 Sumitomo Chemical Company, Limited Process for producing refined metal or metalloid
WO2012083480A1 (en) * 2010-12-20 2012-06-28 Epro Development Limited Method and apparatus for producing pure silicon
CN103243385B (en) * 2013-05-13 2016-04-27 北京科技大学 Electrorefining-liquid cathode in-situ directional solidification prepares the method for high purity single crystal silicon
CN110482556B (en) * 2019-09-10 2020-12-08 中国科学院合肥物质科学研究院 Slagging agent for removing boron in low-temperature refining of silicon material and use method thereof
CN112708764A (en) * 2020-12-15 2021-04-27 湖南腾驰环保科技有限公司 Method for comprehensively recovering germanium dioxide and copper from copper-germanium alloy material
CN115305507A (en) * 2021-05-08 2022-11-08 中南大学 Method for producing metal aluminum by electrolyzing aluminum oxide through molten salt
CN115305568A (en) * 2021-05-08 2022-11-08 中南大学 Smelting method of polycrystalline silicon

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE533780A (en) *
US800984A (en) * 1905-06-02 1905-10-03 Henry M Chance Process of purifying metals.
US2755240A (en) * 1953-11-02 1956-07-17 Shawinigan Water And Power Com Electrolysis of titanium tetrachloride to produce titanium
US3009870A (en) * 1954-05-25 1961-11-21 Ver Aluminum Werke Electrolytic cell
GB833767A (en) * 1956-10-19 1960-04-27 Timax Corp Continuous electrolytic production of titanium
US2952605A (en) * 1956-12-29 1960-09-13 Montedison Spa Refractories resistant to aggressive melts and treatment for obtaining them
US2892763A (en) * 1957-04-12 1959-06-30 American Potash & Chem Corp Production of pure elemental silicon
US2940911A (en) * 1959-01-02 1960-06-14 American Potash & Chem Corp Electrorefining of elemental boron
US3030284A (en) * 1960-11-03 1962-04-17 American Potash & Chem Corp Electrolytic production of elemental boron

Also Published As

Publication number Publication date
DE1213627B (en) 1966-03-31
DE1217077B (en) 1966-05-18
CH409416A (en) 1966-03-15
NL290208A (en)
US3219561A (en) 1965-11-23
US3254010A (en) 1966-05-31
GB989452A (en) 1965-04-22
NL290209A (en)
CH410441A (en) 1966-03-31

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