EP 2086880 A1 20090812 - PYROGENIC SILICA PRODUCED IN A PRODUCTION FACILITY WITH HIGH CAPACITY
Title (en)
PYROGENIC SILICA PRODUCED IN A PRODUCTION FACILITY WITH HIGH CAPACITY
Title (de)
PYROGENE KIESELSÄURE HERGESTELLT IN EINER PRODUKTIONS-ANLAGE MIT GROßER KAPAZITÄT
Title (fr)
ACIDE SILICIQUE PYROGÈNE PRODUIT DANS UNE INSTALLATION DE PRODUCTION DE GRANDE CAPACITÉ
Publication
Application
Priority
- EP 2007062065 W 20071108
- DE 102006054156 A 20061116
Abstract (en)
[origin: WO2008058894A1] The invention relates to a method for the production of pyrogenic silica having a specific surface area of 30 to 500 m?/g and an average aggregate particle size of 100 to 500 nm and a relative thickening effect of greater than 2.0 relative to an amount of 2% by weight silica in a silicon oil with optimum dispersion, and a fraction of less than 0.03% by weight relative to the pyrogenic silica and less than 100,000 coarse particles per 1 millimeter relative to a 10% by weight aqueous dispersion of the silica. The pyrogenic silica is produced in a flame in a reactor, wherein the reaction gases in an amount of 100kg/h of at least one or more silicon compounds, fuel gas at 100Nm~/h, and air with more than 20% by volume oxygen at 300Nm~/h are brought to reaction in a flame, wherein the nozzle ejection velocity of the inset gases from the reactor nozzle is between 10 and 200 m/s, and the gas velocity and the temperature at the nozzle and in the reactor is radially homogeneously distributed.
IPC 8 full level
C01B 33/18 (2006.01); C09D 7/43 (2018.01); C09G 1/02 (2006.01)
CPC (source: EP KR US)
C01B 33/18 (2013.01 - KR); C01B 33/183 (2013.01 - EP US); C03C 19/00 (2013.01 - EP US); C09D 7/43 (2017.12 - EP US); C09D 7/68 (2017.12 - EP US); C09G 1/02 (2013.01 - EP KR US); C09K 3/1409 (2013.01 - EP US); C08K 3/36 (2013.01 - EP US)
Citation (search report)
See references of WO 2008058894A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102006054156 A1 20080521; CN 101528600 A 20090909; EP 2086880 A1 20090812; JP 2010510151 A 20100402; JP 5538895 B2 20140702; KR 101153258 B1 20120702; KR 20090069194 A 20090629; US 2010025373 A1 20100204; US 8142753 B2 20120327; WO 2008058894 A1 20080522
DOCDB simple family (application)
DE 102006054156 A 20061116; CN 200780039275 A 20071108; EP 07822369 A 20071108; EP 2007062065 W 20071108; JP 2009536706 A 20071108; KR 20097010171 A 20071108; US 51474907 A 20071108