EP 2331462 A2 20110615 - PRODUCTION OF SOLAR-GRADE SILICON FROM SILICON DIOXIDE
Title (en)
PRODUCTION OF SOLAR-GRADE SILICON FROM SILICON DIOXIDE
Title (de)
HERSTELLUNG VON SOLAR-SILICIUM AUS SILICIUMDIOXID
Title (fr)
PRODUCTION DE SILICIUM SOLAIRE À PARTIR D'OXYDE DE SILICIUM
Publication
Application
Priority
- EP 2009062515 W 20090928
- DE 102008042506 A 20080930
- US 11082808 P 20081103
Abstract (en)
[origin: WO2010037709A2] The invention relates to a complete method for producing pure silicon that is suitable for use as solar-grade silicon, comprising the reduction of a purified silicon oxide using one or more pure carbon sources, the purified silicon oxide, which was purified as silicon oxide dissolved in an aqueous phase, having a content of other polyvalent metals or metal oxides, in relation to the silicon oxide, of less than or equal to 300 ppm, preferably less than 100 ppm, especially preferably less than 50 ppm and according to the invention less than 10 ppm of the other metals and being obtained advantageously by gel formation in alkaline conditions. The invention also relates to a formulation containing an activator and to the use of purified silicon oxide together with an activator for producing silicon.
IPC 8 full level
C01B 33/025 (2006.01); C01B 31/02 (2006.01)
CPC (source: EP KR US)
C01B 32/05 (2017.07 - EP US); C01B 33/025 (2013.01 - EP KR US); C01B 33/037 (2013.01 - KR); C01B 33/148 (2013.01 - EP US)
Citation (search report)
See references of WO 2010037709A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
WO 2010037709 A2 20100408; WO 2010037709 A3 20100722; AU 2009299921 A1 20100408; CA 2739052 A1 20100408; CN 102171142 A 20110831; EA 201100571 A1 20111031; EP 2331462 A2 20110615; JP 2012504103 A 20120216; KR 20110081168 A 20110713; NZ 591284 A 20130222; US 2011262339 A1 20111027; ZA 201102327 B 20120125
DOCDB simple family (application)
EP 2009062515 W 20090928; AU 2009299921 A 20090928; CA 2739052 A 20090928; CN 200980138734 A 20090928; EA 201100571 A 20090928; EP 09783474 A 20090928; JP 2011529520 A 20090928; KR 20117007276 A 20090928; NZ 59128409 A 20090928; US 200913121759 A 20090928; ZA 201102327 A 20110329