Production of purified iron chloride by a vacuum process in...

Details Production of purified iron chloride by a vacuum process in... Production of purified iron chloride by a vacuum process in...

C - Chemistry, Metallurgy

01

G

C01G 49/10 (2006.01)

Patent

CA 2078516

A process for the recovery of ferrous chloride contained in a suspension resulting from the chlorination of titaniferous raw material in the manufacture of titanium dioxide, comprises: a) slurrying the suspension in fluid; b) removing the water-insoluble constituents from the slurry leaving a filtered solution; c) evaporating the filtered solution under vacuum but only to an extent that chlorides do not crystallize; and d) cooling the filtered solution, at least initially under vacuum, thereby crystallizing ferrous chloride. - 9 -

Méthode pour la récupération du chlorure ferreux présent dans une suspension provenant de la chloration de matières premières titanifères lors de la préparation de dioxyde de titane. La méthode consiste à : a) former une suspension épaisse; b) éliminer dans la suspension les constituants insolubles dans l'eau, en conservant la solution filtrée; c) évaporer sous vide la solution filtrée, en évitant la cristallisation des chlorures; d) refroidir, au moins initialement sous vide, la solution filtrée, en cristallisant ainsi le chlorure ferreux.

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