GB840729A - Improvements in or relating to processes for purifying silicon and/or germanium or alloys or compounds of silicon and/or germanium - Google Patents

Improvements in or relating to processes for purifying silicon and/or germanium or alloys or compounds of silicon and/or germanium

Info

Publication number
GB840729A
GB840729A GB2527856A GB2527856A GB840729A GB 840729 A GB840729 A GB 840729A GB 2527856 A GB2527856 A GB 2527856A GB 2527856 A GB2527856 A GB 2527856A GB 840729 A GB840729 A GB 840729A
Authority
GB
United Kingdom
Prior art keywords
nitride
germanium
silicon
halide
nitrogen
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
GB2527856A
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens 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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Publication of GB840729A publication Critical patent/GB840729A/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
    • C01B33/021—Preparation
    • C01B33/027—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material
    • C01B33/03—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material by decomposition of silicon halides or halosilanes or reduction thereof with hydrogen as the only reducing agent
    • 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
    • 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)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Silicon Compounds (AREA)

Abstract

Silicon and/or germanium, or an alloy or compound of silicon and/or germanium, is purified by mixing it with gaseous or liquid phase with silica nitride, and/or germanium nitride, and then separating it from said nitride. The nitride may be formed in situ, for example by introducing nitrogen. In one embodiment, silicon or germanium is prepared by thermal decomposition and/or reduction of a halide in the presence of nitrogen, and the nitride containing crystals of silicon or germanium obtained are treated with a halogen and/or a halogen acid, especially chlorine or hydrochloric acid, to form a volatile halide, thereby separating it from the nitride, which is not attacked. In another embodiment the halide is mixed with nitrogen and maintained at a temperature above the vaporization point of the halide but below the decomposition temperature of the nitride formed. The substance to be purified may be melted and mixed with the nitride in a crucible, any auxiliary apparatus, e.g. stirrers, being made of, or coated with, the nitride. In an example silicon is freed from copper by melting it, mixing it with silicon nitride and/or nitrogen, and then separating the molten silicon from the solid nitride residue, which retains the impurities.ALSO:Germanium, or an alloy thereof is purified by mixing it in the gaseous or liquid phase with silicon nitride and/or germanium nitride, and then separating the said germanium or alloy from the said nitride. The nitride may be formed in situ, for example by introducing nitrogen. In one embodiment germanium is prepared by thermal decomposition and/or reduction of a halide in the presence of nitrogen, and the nitride-containing crystals of germanium are treated with halogen and/or a halogen acid, especially hydrochloric acid or chlorine, to form the volatile halide, thereby separating it from the nitride, which is not attacked. In another embodiment the halide is mixed with nitrogen and maintained at a temperature above the vaporization point of the halide but below the decomposition temperature of the nitride formed. The substance to be purified may be melted and mixed with the nitride in a crucible, any auxiliary apparatus, e.g. stirrers, being made of, or coated with, the nitride.
GB2527856A 1955-08-18 1956-08-17 Improvements in or relating to processes for purifying silicon and/or germanium or alloys or compounds of silicon and/or germanium Expired GB840729A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE840729X 1955-08-18

Publications (1)

Publication Number Publication Date
GB840729A true GB840729A (en) 1960-07-06

Family

ID=6764546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2527856A Expired GB840729A (en) 1955-08-18 1956-08-17 Improvements in or relating to processes for purifying silicon and/or germanium or alloys or compounds of silicon and/or germanium

Country Status (1)

Country Link
GB (1) GB840729A (en)

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