C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
C01F 17/00 (2006.01) B32B 9/00 (2006.01) C04B 14/36 (2006.01) C08J 3/20 (2006.01) C08K 3/30 (2006.01) C09C 1/00 (2006.01) C09C 3/06 (2006.01) C09D 7/12 (2006.01) C09D 201/00 (2006.01) D21H 17/67 (2006.01)
Patent
CA 2335901
The invention concerns a method for preparing a rare earth sulphide comprising an alkaline element from a phosphate or a borate of the alkaline element, the composition resulting from said method and its use as a colouring pigment. Said method is characterised in that it consists in contacting at least a rare earth compound with a phosphate or a borate of the alkaline element and heating them in the presence of at least a gas selected among hydrogen sulphide or carbon sulphide.
L'invention concerne un procédé de préparation d'un sulfure de terre rare comprenant un élément alcalin à partir d'un phosphate oud'un borate de l'élément alcalin, la composition obtenue par ce procédé et son application comme pigment colorant. Le procédé est caractérisé en ce qu'on met en présence au moins un composé de la terre rare avec un phosphate ou un borate d'un élément alcalin et on les chauffe en présence d'au moins un gaz choisi parmi le sulfure d'hydrogène ou le sulfure de carbone.
Romero Stephane
Trombe Jean-Christian
Rhodia Chimie
Robic
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