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1. (EP0981498) LOW TEMPERATURE PRODUCTION OF METAL OXIDES

Office : European Patent Office
Application Number: 98920678 Application Date: 11.05.1998
Publication Number: 0981498 Publication Date: 01.03.2000
Publication Kind : B1
Designated States: AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LI, LU, MC, NL, PT, SE
Prior PCT appl.: Application Number:GB1998001355 ; Publication Number: Click to see the data
IPC:
B01J 21/06
B01J 21/10
B01J 23/10
B01J 23/755
B01J 37/03
C01B 13/32
C01F 7/16
C01F 17/00
C01G 25/00
C01G 53/00
H01B 1/08
H01M 4/90
H01M 8/02
H01M 8/12
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
21
Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
06
Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
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
21
Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
10
Magnesium; Oxides or hydroxides thereof
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
23
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/113
10
of rare earths
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
23
Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/113
70
of the iron group metals or copper
74
Iron group metals
755
Nickel
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
37
Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
02
Impregnation, coating or precipitation
03
Precipitation; Co-precipitation
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
32
by oxidation or hydrolysis of elements or compounds in the liquid or solid state
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
16
Preparation of alkaline earth metal aluminates; Aluminium oxide or hydroxide therefrom
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
17
Compounds of the rare-earth metals, i.e. scandium, yttrium, lanthanum, or the group of the lanthanides
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
G
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F94
25
Compounds of zirconium
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
G
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F94
53
Compounds of nickel
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
B
CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
1
Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
06
mainly consisting of other non-metallic substances
08
oxides
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4
Electrodes
86
Inert electrodes with catalytic activity, e.g. for fuel cells
90
Selection of catalytic material
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8
Fuel cells; Manufacture thereof
02
Details
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8
Fuel cells; Manufacture thereof
10
Fuel cells with solid electrolytes
12
operating at high temperature, e.g. with stabilised ZrO2 electrolyte
CPC:
B82Y 30/00
B01J 37/036
C01F 7/162
C01F 17/0043
C01G 25/00
C01G 25/006
C01G 53/00
C01P 2002/50
C01P 2004/64
C01P 2006/60
H01M 4/9016
H01M 4/9025
H01M 8/1246
Y02E 60/525
Y02P 70/56
Applicants: UNIV WARWICK
Inventors: BHATTACHARYA ASHOK KUMAR
HARTRIDGE ADRIAN
Priority Data: 9709449 10.05.1997 GB
9801355 11.05.1998 GB
Title: (DE) HERSTELLUNG VON METALLOXIDEN BEI NEIDERIGER TEMPERATUR
(EN) LOW TEMPERATURE PRODUCTION OF METAL OXIDES
(FR) PRODUCTION A BASSE TEMPERATURE D'OXYDES METALLIQUES
Abstract:
(EN) There is provided a low temperature process for the preparation of a nanocrystalline and dispersible metal oxide gel product, which includes the steps of heating a mixture of a wet hydrous metal oxide, in the presence of either a hydrolytic acid or a metal salt, subsequent heating under a controlled pressure atmosphere to the decomposition temperature of the acid or salt, followed by removal of any non-dispersible product.
(FR) L'invention concerne un procédé se déroulant à basse température et permettant la préparation d'un produit gel d'oxydes métalliques nanocristallin et dispersible. Ce procédé comporte les étapes suivantes consistant à chauffer un mélange d'un oxyde métallique hydrique et d'eau en présence soit d'un acide hydrolytique soit d'un sel métallique; ensuite, à chauffer ce mélange dans un milieu à pression régulée jusqu'à atteindre la température de décomposition de l'acide ou du sel; enfin, à extraire tout produit non-dispersible.
Also published as:
JP2001525784 WO/1998/051617