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1. (WO2007006614) ALUMINIUM OXIDE DISPERSION
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/006614 International Application No.: PCT/EP2006/063047
Publication Date: 18.01.2007 International Filing Date: 09.06.2006
IPC:
C01F 7/02 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
7
Compounds of aluminium
02
Aluminium oxide; Aluminium hydroxide; Aluminates
Applicants:
EVONIK DEGUSSA GMBH [DE/DE]; Rellinghauser Strasse 1-11 45128 Essen, DE (AllExceptUS)
LORTZ, Wolfgang [DE/DE]; DE (UsOnly)
BATZ-SOHN, Christoph [DE/DE]; DE (UsOnly)
PERLET, Gabriele [DE/DE]; DE (UsOnly)
LACH, Heinz [DE/DE]; DE (UsOnly)
WILL, Werner [DE/DE]; DE (UsOnly)
Inventors:
LORTZ, Wolfgang; DE
BATZ-SOHN, Christoph; DE
PERLET, Gabriele; DE
LACH, Heinz; DE
WILL, Werner; DE
Common
Representative:
EVONIK DEGUSSA GMBH; S-IPM-PAT Postcode 84/339 Rodenbacher Chaussee 4 63457 Hanau, DE
Priority Data:
10 2005 032 427.412.07.2005DE
Title (EN) ALUMINIUM OXIDE DISPERSION
(FR) DISPERSION A BASE D'OXYDE D'ALUMINIUM
Abstract:
(EN) Aluminium oxide dispersion, which is stable in a pH range 5 from 5 to 9 and has an aluminium oxide content of at least 40 wt.%, obtainable by dispersing pyrogenically produced aluminium oxide particles in an aqueous phase, wherein one or several at least dibasic hydroxycarboxylic acids present dissolved in the dispersion and at least one salt of a 10 dialkali metal hydrogen phosphate and/or alkali metal dihydrogen phosphate are added to the aqueous phase each mutually independently in a quantity of 0.3 - 3 x 10-6 mol/m2 of aluminium oxide specific surface area.
(FR) L'invention concerne une dispersion à base d'oxyde d'aluminium, stable dans un intervalle de pH compris entre 5 et 9, renfermant au moins 40 % en masse d'oxyde d'aluminium, obtenue selon un procédé consistant à disperser des particules d'oxyde d'aluminium produites par pyrogénation dans une phase aqueuse, un ou plusieurs acides hydroxycarboxyliques au moins dibasiques, présents dissous dans la dispersion, et au moins un sel d'un phosphate d'hydrogène de métal dialcalin et/ou de phosphate de dihydrogène de métal alcalin étant ajoutés à la phase aqueuse, indépendamment, selon une quantité correspondant à 0,3 à 3 x 10-6 mol/m2 sur la base de la surface spécifique de l'oxyde d'aluminium.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1020080023255EP1901996JP2009500288RU02386587ES2363793US20080264299
CN101223106IN111/KOLNP/2008