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1. (WO2010083865) PROCESS AND PLANT FOR PRODUCING METAL OXIDE FROM METAL SALTS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/083865 International Application No.: PCT/EP2009/009115
Publication Date: 29.07.2010 International Filing Date: 18.12.2009
Chapter 2 Demand Filed: 03.11.2010
IPC:
C01B 13/18 (2006.01) ,C01F 7/44 (2006.01) ,B01J 6/00 (2006.01) ,B01J 8/00 (2006.01) ,B01J 8/26 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
13
Oxygen; Ozone; Oxides or hydroxides in general
14
Methods for preparing oxides or hydroxides in general
18
by thermal decomposition of compounds, e.g. of salts or hydroxides
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
44
Dehydration of aluminium hydroxide
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
6
Calcining; Fusing
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
8
Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
J
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
8
Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
18
with fluidised particles
24
according to "fluidised-bed" technique
26
with two or more fluidised beds, e.g. reactor and regeneration installations
Applicants:
OUTOTEC OYJ [FI/FI]; Riihitontuntie 7 FIN-02200 Espoo, FI (AllExceptUS)
MISSALLA, Michael [DE/DE]; DE (UsOnly)
HILTUNEN, Pekka [DE/DE]; DE (UsOnly)
BLIGH, Roger [AU/AU]; AU (UsOnly)
SCHMIDBAUER, Erwin [DE/DE]; DE (UsOnly)
KLETT, Cornelis [DE/DE]; DE (UsOnly)
SCHNEIDER, Günter [DE/DE]; DE (UsOnly)
Inventors:
MISSALLA, Michael; DE
HILTUNEN, Pekka; DE
BLIGH, Roger; AU
SCHMIDBAUER, Erwin; DE
KLETT, Cornelis; DE
SCHNEIDER, Günter; DE
Agent:
KEIL & SCHAAFHAUSEN; Cronstettenstrasse 66 60322 Frankfurt am Main, DE
Priority Data:
10 2009 006 095.226.01.2009DE
Title (EN) PROCESS AND PLANT FOR PRODUCING METAL OXIDE FROM METAL SALTS
(FR) PROCÉDÉ ET INSTALLATION DE PRODUCTION D'OXYDE MÉTALLIQUE À PARTIR DE SELS MÉTALLIQUES
Abstract:
(EN) The present invention relates to the production of metal oxide from metal salts, in particular from aluminum hydroxide, wherein the metal salt is preheated in a first preheating stage, precalcined in a second preheating stage and calcined to metal oxide in a fluidized-bed reactor, and wherein the product obtained then is cooled in at least one suspension heat exchanger and subsequently in a multi- stage indirect cooler. To reduce the energy demand of a calcining plant, fluidizing air is supplied to the reactor with a temperature of up to 150 °C, and before entering the first preheating stage the metal salt is at least partly supplied to a hydrate drier in which it is indirectly heated with heat transfer medium from the first stage of the indirect cooler and dried.
(FR) La présente invention concerne la production d'oxyde métallique à partir de sels métalliques, en particulier à partir d'hydroxyde d'aluminium. Le sel métallique est préchauffé dans un premier étage de préchauffage, puis précalciné dans un second étage de préchauffage et calciné dans un réacteur à lit fluidisé en vu d'obtenir un oxyde métallique. Le produit alors obtenu est refroidi dans au moins un échangeur de chaleur par suspension, puis dans un refroidisseur indirect à plusieurs étages. Pour réduire la demande en énergie de l'installation de calcination, de l'air de fluidification à une température allant jusqu'à 150 °C est introduit dans le réacteur, et avant d'atteindre le premier étage de préchauffage, le sel métallique est au moins partiellement introduit dans un dispositif de déshydratation dans lequel il est indirectement chauffé par un milieu de transfert de chaleur provenant du premier étage du refroidisseur indirect et séché.
front page image
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, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, 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, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, 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: English (EN)
Filing Language: English (EN)
Also published as:
FI20110259US20120052000CN102317202CA2745572EA201190030BRPI0924110
AU2009337948IN1081/MUMNP/2011