Method for preparing coloured pigments with titanium dioxide...

Details Method for preparing coloured pigments with titanium dioxide... Method for preparing coloured pigments with titanium dioxide...

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01) C09C 1/00 (2006.01)

Patent

CA 2268076

The invention concerns a method for preparing coloured pigments with titanium dioxide base comprising the calcination of octahedrite dioxide until complete transformation of the octahedrite titanium dioxide into rutile titanium dioxide, in which is used an octahedrite titanium dioxide having a rutile phase temperature of at least 1000 ~C and a proportion of sulphate, expressed in SO3, of at most 1 wt. %.

La présente invention a pour objet un procédé pour la préparation de pigments colorés à base de dioxyde de titane comprenant la calcination de dioxyde anatase jusqu'à transformation complète du dioxyde de titane anatase en dioxyde de titane rutile, dans lequel on utilise un dioxyde de titane anatase présentant une température de rutilisation d'au moins 1000 ·C et un taux de sulfate, exprimé en SO¿3?, d'au plus 1 % en poids.

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