ES8405728A1 - Process and apparatus for obtaining silicon from fluosilicic acid. - Google Patents

Process and apparatus for obtaining silicon from fluosilicic acid.

Info

Publication number
ES8405728A1
ES8405728A1 ES518813A ES518813A ES8405728A1 ES 8405728 A1 ES8405728 A1 ES 8405728A1 ES 518813 A ES518813 A ES 518813A ES 518813 A ES518813 A ES 518813A ES 8405728 A1 ES8405728 A1 ES 8405728A1
Authority
ES
Spain
Prior art keywords
powder
container
silicon
reaction products
reaction
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
ES518813A
Other languages
Spanish (es)
Other versions
ES518813A0 (en
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.)
SRI International Inc
Original Assignee
SRI International Inc
Stanford Research Institute
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 SRI International Inc, Stanford Research Institute filed Critical SRI International Inc
Publication of ES518813A0 publication Critical patent/ES518813A0/en
Publication of ES8405728A1 publication Critical patent/ES8405728A1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0073—Sealings
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0066—Stirrers
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
    • 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
    • C01B33/033—Preparation by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material by reduction of silicon halides or halosilanes with a metal or a metallic alloy as the only reducing agents
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/0204—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components
    • 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
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/141—Feedstock

Abstract

Process for producing high puritysolar grade silicon be reaction (12) of silicon tetrafluoride with sodium which is carried out inside a powder lined reaction container (76) enclosed within a reactor (42). The powder is selected from at least one fluoride or silicate of alkali or alkaline earth metals or an oxide of silicon or a powder of reaction products (78) the powder liner (76) forming the container being capable of withstanding heating below themelting point of sodium fluoride without sintering or melting. The powder liner (76) forming the container is made sufficiently thick to provide a thermal barrier, prevent bonding or adhesion of the reaction products to the support substrate thereby providing easy release of the reaction products (78).
ES518813A 1982-01-05 1983-01-05 Process and apparatus for obtaining silicon from fluosilicic acid. Expired ES8405728A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US33713682A 1982-01-05 1982-01-05

Publications (2)

Publication Number Publication Date
ES518813A0 ES518813A0 (en) 1984-06-16
ES8405728A1 true ES8405728A1 (en) 1984-06-16

Family

ID=23319268

Family Applications (1)

Application Number Title Priority Date Filing Date
ES518813A Expired ES8405728A1 (en) 1982-01-05 1983-01-05 Process and apparatus for obtaining silicon from fluosilicic acid.

Country Status (7)

Country Link
EP (1) EP0098297A1 (en)
ES (1) ES8405728A1 (en)
GR (1) GR78318B (en)
IT (1) IT1164855B (en)
MA (1) MA19674A1 (en)
PT (1) PT76066B (en)
WO (1) WO1983002443A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1620404A (en) * 2002-01-18 2005-05-25 瓦克化学有限公司 Method for producing amorphous silicon and/or organohalosilanes produced therefrom
EP1710207A1 (en) * 2002-01-18 2006-10-11 Wacker Chemie AG Process for making amorphous silicon
DE102010045260A1 (en) 2010-09-14 2012-03-15 Spawnt Private S.À.R.L. Process for the preparation of fluorinated polysilanes
WO2017075108A1 (en) * 2015-10-26 2017-05-04 Sri International Method and apparatus for solar grade silicon production

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2172969A (en) * 1936-09-28 1939-09-12 Eringer Josef Process for obtaining silicon from its compounds
US3041145A (en) * 1957-07-15 1962-06-26 Robert S Aries Production of pure silicon
US2941867A (en) * 1957-10-14 1960-06-21 Du Pont Reduction of metal halides
US2999736A (en) * 1959-01-07 1961-09-12 Houdry Process Corp High purity silicon
LU38582A1 (en) * 1959-05-13
US3793436A (en) * 1970-08-03 1974-02-19 R Hartig Closed pond system for wet process phosphate plants
US3963838A (en) * 1974-05-24 1976-06-15 Texas Instruments Incorporated Method of operating a quartz fluidized bed reactor for the production of silicon
US4169129A (en) * 1978-02-24 1979-09-25 Nasa Sodium storage and injection system
US4188368A (en) * 1978-03-29 1980-02-12 Nasa Method of producing silicon
US4298586A (en) * 1978-10-23 1981-11-03 Occidental Research Corp. Recovery of hydrofluoric acid from fluosilicic acid

Also Published As

Publication number Publication date
MA19674A1 (en) 1983-07-01
PT76066B (en) 1985-10-04
IT1164855B (en) 1987-04-15
GR78318B (en) 1984-09-26
EP0098297A1 (en) 1984-01-18
ES518813A0 (en) 1984-06-16
WO1983002443A1 (en) 1983-07-21
PT76066A (en) 1983-02-01
IT8347505A0 (en) 1983-01-04

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