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1. (WO2012113650) PROCESS FOR PREPARING AQUEOUS COLLOIDAL SILICA SOLS OF HIGH PURITY FROM ALKALI METAL SILICATE SOLUTIONS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2012/113650    International Application No.:    PCT/EP2012/052199
Publication Date: 30.08.2012 International Filing Date: 09.02.2012
IPC:
C09K 3/14 (2006.01), C01B 33/141 (2006.01), C01B 33/143 (2006.01), C01B 33/148 (2006.01), C01B 33/18 (2006.01)
Applicants: EVONIK DEGUSSA GMBH [DE/DE]; Rellinghauser Strasse 1-11 45128 Essen (DE) (For All Designated States Except US).
FUHRMANN, Claudia [DE/DE]; (DE) (For US Only).
OEHM, Dieter [DE/DE]; (DE) (For US Only).
PANZ, Christian [DE/DE]; (DE) (For US Only).
PAULAT, Florian [DE/DE]; (DE) (For US Only).
SCHÜTTE, Rüdiger [DE/DE]; (DE) (For US Only).
RAULEDER, Hartwig [DE/DE]; (DE) (For US Only).
MARKOWZ, Georg [DE/DE]; (DE) (For US Only).
LANG, Jürgen Erwin [DE/DE]; (DE) (For US Only).
FRINGS, Bodo [DE/DE]; (DE) (For US Only)
Inventors: FUHRMANN, Claudia; (DE).
OEHM, Dieter; (DE).
PANZ, Christian; (DE).
PAULAT, Florian; (DE).
SCHÜTTE, Rüdiger; (DE).
RAULEDER, Hartwig; (DE).
MARKOWZ, Georg; (DE).
LANG, Jürgen Erwin; (DE).
FRINGS, Bodo; (DE)
Priority Data:
10 2011 004 534.1 22.02.2011 DE
10 2011 017 783.3 29.04.2011 DE
Title (DE) VERFAHREN ZUR HERSTELLUNG WÄSSRIGER KOLLOIDALER SILIKASOLE HOHER REINHEIT AUS ALKALIMETALLSILIKATLÖSUNGEN
(EN) PROCESS FOR PREPARING AQUEOUS COLLOIDAL SILICA SOLS OF HIGH PURITY FROM ALKALI METAL SILICATE SOLUTIONS
(FR) PROCÉDÉ DE PRODUCTION DE SOLS SILICEUX COLLOÏDAUX AQUEUX TRÈS PURS À PARTIR DE SOLUTIONS DE SILICATES DE MÉTAUX ALCALINS
Abstract: front page image
(DE)Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung wässriger kolloidaler Silikasole hoher Reinheit aus Silikatlösungen, wässrige kolloidale Silikasole mit speziellem Verunreinigungsprofil sowie deren Verwendung. Ferner umfasst die Erfindung im Rahmen des Aufreinigungsprozesses als Zwischenprodukt anfallende hochreine wässrige Kieselsäure, durch Entwässerung erhältliches Siliziumdioxid hoher Reinheit und dessen Verwendung.
(EN)The present invention relates to a process for preparing aqueous colloidal silica sols of high purity from silicate solutions, to aqueous colloidal silica sols with a specific profile of impurities, and to the use thereof. The invention further encompasses high-purity aqueous silica obtained as an intermediate in the course of the purification process, high-purity silicon dioxide obtainable by dewatering, and the use thereof.
(FR)L'invention concerne un procédé de production de sols siliceux colloïdaux aqueux très purs à partir de solutions à base de silicates, ainsi que des sols siliceux colloïdaux aqueux à profil d'impureté spécial et leur utilisation. L'invention concerne par ailleurs de l'acide silicique aqueux très pur précipité comme produit intermédiaire lors du processus de purification et du dioxyde de silicium très pur obtenu par déshydratation dudit acide silicique aqueux et utilisation de ce dernier.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: German (DE)
Filing Language: German (DE)