Method for the production of water-free rare earth metal...

C - Chemistry – Metallurgy – 01 – F

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C01F 17/00 (2006.01) C08F 4/52 (2006.01)

Patent

CA 2591193

The invention relates to a method wherein rare earth metal oxides are reacted with halogenation agents of general formula (1), wherein M= Si, Ge, Sn, Ti, Zr, Hf; Hal= CI, Br, I; X1,X2,X3 = independently from each other CI, Br, I, H, alkoxy (-OR), wherein R represents an organo radical having 1-20 atoms, alkyl having 1-20 C atoms or aryl with 6-20 C atoms, wherein the alkyl or arly radicals can include one or several halogen substituents selected from the group of F, CI, Br or I; in an aprotic polar solvent. The invention also relates to synthesis mixtures containing water-free rare earth metal halogenides and the use thereof

L'invention concerne un procédé selon lequel des oxydes de métaux terreux rares réagissent avec des agents d'halogénation de la formule générale (I) MHalX1X2X3 dans un solvant aprotique polaire. Dans la formule générale (I) MHalX1X2X3, M représente Si, Ge, Sn, Ti, Zr, Hf; Hal représente Cl, Br, I; X1, X2, X3 représentent indépendamment l'un de l'autre Cl, Br, I, H, alcoxy (-OR), R représentant un groupe organique avec 1 à 20 atomes de carbone, alkyle avec 1 à 20 atomes de carbone ou aryle avec 6 à 20 atomes de carbone, les groupes alkyle ou aryle pouvant porter au moins un autre substituant d'halogène, sélectionné dans le groupe composé de F, Cl, Br ou I. L'invention concerne également des mélanges de synthèse contenant des halogénures de métaux terreux rares anhydres et leur utilisation.

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