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1. EP2178635 - PREPARATION OF NEW HYDROTALCITE-LIKE ADSORBENTS USEFUL FOR THE ADSORPTION OF ANIONIC MATERIALS

Office
European Patent Office
Application Number 08773855
Application Date 03.07.2008
Publication Number 2178635
Publication Date 28.04.2010
Publication Kind A1
IPC
B01J 20/04
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
20Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
02comprising inorganic material
04comprising compounds of alkali metals, alkaline earth metals or magnesium
B01J 20/30
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
20Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
30Processes for preparing, regenerating or reactivating
C02F 1/28
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
28by sorption
CPC
B01J 20/08
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
20Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
02comprising inorganic material
06comprising oxides or hydroxides of metals not provided for in group B01J20/04
08comprising aluminium oxide or hydroxide; comprising bauxite
B01J 20/30
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
20Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
30Processes for preparing, regenerating, or reactivating
C01F 7/004
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
FCOMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
7Compounds of aluminium
002Compounds containing, besides aluminium, two or more other elements, with the exception of oxygen and hydrogen
004containing carbonate ions, e.g. dawsonite
C01P 2002/22
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
2002Crystal-structural characteristics
20Two-dimensional structures
22layered hydroxide-type, e.g. of the hydrotalcite-type
C02F 1/281
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
28by sorption
281using inorganic sorbents
C02F 5/00
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
5Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Applicants SUED CHEMIE AG
Inventors ORTIZ NIEMBRO JOSE ANTONIO
GONZALES LOZANO EDUARDO
PACHECO GARCIA FIDEL
ROSANO OERTEGA GENOVEVA
MARTINEZ QUEVEDO VERONICA
Designated States
Title
(DE) HERSTELLUNG VON NEUEN HYDROTALCITARTIGEN ADSORPTIONSMITTELN, DIE ZUR VERWENDUNG ZUR ADSORPTION VON ANIONISCHEN SUBSTANZEN GEEIGNET SIND
(EN) PREPARATION OF NEW HYDROTALCITE-LIKE ADSORBENTS USEFUL FOR THE ADSORPTION OF ANIONIC MATERIALS
(FR) PRÉPARATION DE NOUVEAUX ADSORBANTS DE TYPE HYDROTALCITE UTILES POUR L'ADSORPTION DE MATÉRIAUX ANIONIQUES
Abstract
(EN)
The invention discloses a method for the synthesis of hydro-talcite-like adsorbent which is in particular suitable for the adsorption of sulfur-containing anions, e.g. in the purification of drinking water. The method comprises mixing an aqueous aluminium source and aqueous magnesium source with an alkaline and/or soda containing solution under high shear agitation. As the aluminium source is used an extract derived from the extraction of clays with strong mineral acids in the production of bleaching earth. The product can be easily separated and directly used as an adsorbent for different anions.

(FR)
L'invention concerne un procédé pour la synthèse d'adsorbant de type hydrotalcite qui conviennent en particulier pour l'adsorption d'anions contenant du soufre, par exemple dans la purification d'eau potable. Le procédé comprend le mélange d'une source aqueuse d'aluminium et d'une source aqueuse de magnésium avec une solution alcaline et/ou contenant de la soude sous agitation à haut cisaillement. On utilise comme source d'aluminium un extrait dérivé de l'extraction d'argiles par des acides minéraux forts dans la production de terre décolorante. Le produit peut être facilement séparé et directement utilisé comme adsorbant pour différents anions.