GB897730A - Improvements in and relating to methods of purifying substances - Google Patents

Improvements in and relating to methods of purifying substances

Info

Publication number
GB897730A
GB897730A GB2989458A GB2989458A GB897730A GB 897730 A GB897730 A GB 897730A GB 2989458 A GB2989458 A GB 2989458A GB 2989458 A GB2989458 A GB 2989458A GB 897730 A GB897730 A GB 897730A
Authority
GB
United Kingdom
Prior art keywords
rod
relating
methods
lowered
silicon
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
GB2989458A
Inventor
Peter Thomas Harris
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 NL243412D priority Critical patent/NL243412A/xx
Application filed by Mullard Ltd filed Critical Mullard Ltd
Priority to GB2989458A priority patent/GB897730A/en
Priority to FR805292A priority patent/FR1236242A/en
Publication of GB897730A publication Critical patent/GB897730A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
    • B01J6/005—Fusing
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Silicon Compounds (AREA)

Abstract

Silicon is purified by allowing drops thereof to fall through a vacuum or a purifying atmosphere. As shown, the lower end of a rod of silicon 13 is heated in a silica tube 1 by means of an induction coil 11 so as to form a drop 14 which falls into a silica crucible 9, the rod being lowered as melting proceeds. Hydrogen-containing water vapour may be passed through the tube via inlet 2 and outlet 3 at a rate of 21/min. The rod may have a diameter of 10 cm. and may be lowered at a <PICT:0897730/III/1> rate of 1 to 10 cm./hr., e.g. 5 cm./hr. The drops may fall 25 to 50 cm.
GB2989458A 1958-09-18 1958-09-18 Improvements in and relating to methods of purifying substances Expired GB897730A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL243412D NL243412A (en) 1958-09-18
GB2989458A GB897730A (en) 1958-09-18 1958-09-18 Improvements in and relating to methods of purifying substances
FR805292A FR1236242A (en) 1958-09-18 1959-09-16 Process for the purification of solid substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2989458A GB897730A (en) 1958-09-18 1958-09-18 Improvements in and relating to methods of purifying substances

Publications (1)

Publication Number Publication Date
GB897730A true GB897730A (en) 1962-05-30

Family

ID=10298908

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2989458A Expired GB897730A (en) 1958-09-18 1958-09-18 Improvements in and relating to methods of purifying substances

Country Status (3)

Country Link
FR (1) FR1236242A (en)
GB (1) GB897730A (en)
NL (1) NL243412A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3508167B2 (en) 1993-07-27 2004-03-22 Ｊｆｅスチール株式会社 Silicon purification method and silicon pretreatment device
WO2005061383A1 (en) * 2003-12-04 2005-07-07 Dow Corning Corporation Method of removing impurities from metallurgical grade silicon to produce solar grade silicon

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3508167B2 (en) 1993-07-27 2004-03-22 Ｊｆｅスチール株式会社 Silicon purification method and silicon pretreatment device
WO2005061383A1 (en) * 2003-12-04 2005-07-07 Dow Corning Corporation Method of removing impurities from metallurgical grade silicon to produce solar grade silicon

Also Published As

Publication number Publication date
FR1236242A (en) 1960-07-15
NL243412A (en)

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