WO2004048271A3 - Cluster de praseodyme, dispersion de ce cluster et leurs procedes de preparation - Google Patents

Cluster de praseodyme, dispersion de ce cluster et leurs procedes de preparation Download PDF

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Publication number
WO2004048271A3
WO2004048271A3 PCT/FR2003/003414 FR0303414W WO2004048271A3 WO 2004048271 A3 WO2004048271 A3 WO 2004048271A3 FR 0303414 W FR0303414 W FR 0303414W WO 2004048271 A3 WO2004048271 A3 WO 2004048271A3
Authority
WO
WIPO (PCT)
Prior art keywords
cluster
dispersion
praseodymium
methods
solvent medium
Prior art date
Application number
PCT/FR2003/003414
Other languages
English (en)
Other versions
WO2004048271A2 (fr
Inventor
Jean-Yves Chane-Ching
Nathalie Mahe
Original Assignee
Rhodia Elect & Catalysis
Jean-Yves Chane-Ching
Guillou Olivier
Nathalie Mahe
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rhodia Elect & Catalysis, Jean-Yves Chane-Ching, Guillou Olivier, Nathalie Mahe filed Critical Rhodia Elect & Catalysis
Priority to AU2003295026A priority Critical patent/AU2003295026A1/en
Publication of WO2004048271A2 publication Critical patent/WO2004048271A2/fr
Publication of WO2004048271A3 publication Critical patent/WO2004048271A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F17/00—Compounds of rare earth metals
    • C01F17/20—Compounds containing only rare earth metals as the metal element
    • C01F17/276—Nitrates
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/77—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by unit-cell parameters, atom positions or structure diagrams

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Catalysts (AREA)

Abstract

L'invention concerne un cluster de praséodyme de formule (1) [Pr6O(OH) 8 (NO3) 6 (H2O) n] 2+ (1), n étant égal à 12 ou 14, ainsi qu'une dispersion qui comprend des clusters selon cette formule (1) dans une phase liquide aqueuse ou dans une phase liquide à base d'un solvant polaire non protogène. Le cluster de l'invention peut être obtenu par un procédé dans lequel on forme une solution d'un nitrate de praséodyme; on met en présence ladite solution et une base en quantité telle que le rapport molaire OH/Pr soit d'au plus 1; on concentre le milieu obtenu à l'étape précédente de manière à obtenir une concentration en praséodyme d'au moins 1 mol./l ce par quoi on obtient une dispersion aqueuse dudit cluster. Par évaporation de cette dispersion on obtient un solide qui peut être remis en suspension dans le solvant polaire précité.Le cluster de l'invention peut être utilisé dans la fabrication de catalyseurs.
PCT/FR2003/003414 2002-11-19 2003-11-18 Cluster de praseodyme, dispersion de ce cluster et leurs procedes de preparation WO2004048271A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003295026A AU2003295026A1 (en) 2002-11-19 2003-11-18 Praseodymium cluster, aqueous dispersion and dispersion in solvent medium of said cluster and methods for preparing same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0214451A FR2847248B1 (fr) 2002-11-19 2002-11-19 Cluster de praseodyme, dispersion aqueuse et dispersion en milieu solvant de ce cluster et leurs procedes de preparation
FR02/14451 2002-11-19

Publications (2)

Publication Number Publication Date
WO2004048271A2 WO2004048271A2 (fr) 2004-06-10
WO2004048271A3 true WO2004048271A3 (fr) 2004-07-08

Family

ID=32187717

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2003/003414 WO2004048271A2 (fr) 2002-11-19 2003-11-18 Cluster de praseodyme, dispersion de ce cluster et leurs procedes de preparation

Country Status (3)

Country Link
AU (1) AU2003295026A1 (fr)
FR (1) FR2847248B1 (fr)
WO (1) WO2004048271A2 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5002747A (en) * 1987-06-29 1991-03-26 Rhone-Poulenc Chimie Process for obtaining ceric oxide
US5021192A (en) * 1986-03-26 1991-06-04 Rhone-Poulenc Chimie Colloidal dispersions of cerium (IV) compound
US6171999B1 (en) * 1998-02-04 2001-01-09 Mazda Motor Corporation Method of manufacturing catalyst
WO2002070408A1 (fr) * 2001-03-08 2002-09-12 Rhodia Electronics And Catalysis Oxyde de praseodyme a surface specifique elevee et procedes de preparation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5021192A (en) * 1986-03-26 1991-06-04 Rhone-Poulenc Chimie Colloidal dispersions of cerium (IV) compound
US5002747A (en) * 1987-06-29 1991-03-26 Rhone-Poulenc Chimie Process for obtaining ceric oxide
US6171999B1 (en) * 1998-02-04 2001-01-09 Mazda Motor Corporation Method of manufacturing catalyst
WO2002070408A1 (fr) * 2001-03-08 2002-09-12 Rhodia Electronics And Catalysis Oxyde de praseodyme a surface specifique elevee et procedes de preparation

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS (1977), 42(4), 1285-9, 1977 *
DATABASE CA [online] CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, US; 1977, JEDINAKOVA, V.: "Densimetric investigations on praseodymium aqua and nitrato complex formation in aqueous solutions of electrolytes", XP002255958, retrieved from STN Database accession no. 87:12344 CA *
DATABASE POWDER DIFFRACTION FILE International Centre for Diffraction Data (Newton Square, Pa, USA); XP002255959 *
GASGNIER M ET AL: "PREPARATION, CRYSTALLINE PROPERTIES AND X-RAY ABSORPTION SPECTRA OFRARE EARTH OXIDES ROX (R CE, PR AND TB;1.5 X 2)", JOURNAL OF THE LESS-COMMON METALS, ELSEVIER-SEQUOIA S.A. LAUSANNE, CH, vol. 156, no. 1, 1 December 1989 (1989-12-01), pages 59 - 73, XP000083941 *

Also Published As

Publication number Publication date
FR2847248A1 (fr) 2004-05-21
AU2003295026A1 (en) 2004-06-18
AU2003295026A8 (en) 2004-06-18
FR2847248B1 (fr) 2005-01-21
WO2004048271A2 (fr) 2004-06-10

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