Granular scrubs for use in manufacturing titanium dioxide...

Details Granular scrubs for use in manufacturing titanium dioxide... Granular scrubs for use in manufacturing titanium dioxide...

C - Chemistry, Metallurgy

09

C

C09C 1/36 (2006.01)

Patent

CA 2213895

This invention relates to an improved process for making titanium dioxide pigment, wherein granular scouring particles (scrubs) comprising specific water-soluble salts (KCl, CsCl, or mixtures thereof) are introduced into a cooling conduit containing a hot gaseous suspension of titanium dioxide particulate. The process provides titanium dioxide pigment having higher carbon black undertone (CBU) levels.

Méthode améliorée pour l'obtention de pigments de dioxyde de titane, où des particules de lavage granulaires (KCl, CsCl ou leurs mélanges) sont introduites dans un conduit de refroidissement renfermant une suspension gazeuse, à haute température, de particules de dioxyde de titane. Le procédé donne des pigments de dioxyde de titane possédant des teneurs supérieures en nuances de fond de noir de carbone (CBU).

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