GB787043A - Method for production of silicon - Google Patents

Method for production of silicon

Info

Publication number
GB787043A
GB787043A GB2635255A GB2635255A GB787043A GB 787043 A GB787043 A GB 787043A GB 2635255 A GB2635255 A GB 2635255A GB 2635255 A GB2635255 A GB 2635255A GB 787043 A GB787043 A GB 787043A
Authority
GB
United Kingdom
Prior art keywords
silicon
hydrogen
passed
tetraiodide
chamber
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
GB2635255A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products 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
Priority to US787043XA priority Critical
Application filed by Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB787043A publication Critical patent/GB787043A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00Silicon; Compounds thereof
    • C01B33/02Silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00General methods of reducing to metals
    • C22B5/02Dry methods smelting of sulfides or formation of mattes
    • C22B5/16Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

Silicon together with hydrogen iodide is produced by interacting silicon tetraiodide vapour and hydrogen at a temperature of preferably 900-1000 DEG C., more preferably 900-950 DEG C. Hydrogen, purified by passing through finely divided copper at elevated temperature in order to remove oxygen and through calcium chloride to remove moisture, may be passed continuously over molten silicon tetraiodide and the resulting gaseous mixture of hydrogen and silicon tetraiodide passed into a reaction chamber of graphite or quartz surrounded by an induction heating coil. Silicon collects in the chamber and is periodically removed. Hydrogen iodide may be frozen out from the residual gases by passing through a cold trap containing liquid nitrogen. In a cyclic process, iodine may be passed over silicon of 97 per cent purity at a temperature of 750 DEG C., and the resulting silicon tetraiodide passed into a chamber containing pure graphite plates, which may be removed and replaced without stopping the process, for the deposition of the silicon. The hydrogen iodide produced is collected, converted into iodine in known manner and recycled to the process.
GB2635255A 1954-09-15 1955-09-14 Method for production of silicon Expired GB787043A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US787043XA true 1954-09-15 1954-09-15

Publications (1)

Publication Number Publication Date
GB787043A true GB787043A (en) 1957-11-27

Family

ID=22145716

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2635255A Expired GB787043A (en) 1954-09-15 1955-09-14 Method for production of silicon

Country Status (2)

Country Link
FR (1) FR1136020A (en)
GB (1) GB787043A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012861A (en) * 1960-01-15 1961-12-12 Du Pont Production of silicon
US3020129A (en) * 1958-07-25 1962-02-06 Gen Electric Production of silicon of improved purity
US3057690A (en) * 1958-12-09 1962-10-09 Siemens Schuckerwerke Ag Method for producing hyperpure silicon

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3020129A (en) * 1958-07-25 1962-02-06 Gen Electric Production of silicon of improved purity
US3057690A (en) * 1958-12-09 1962-10-09 Siemens Schuckerwerke Ag Method for producing hyperpure silicon
US3012861A (en) * 1960-01-15 1961-12-12 Du Pont Production of silicon

Also Published As

Publication number Publication date
FR1136020A (en) 1957-05-07

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