C - Chemistry – Metallurgy – 01 – G
Patent
C - Chemistry, Metallurgy
01
G
C01G 23/053 (2006.01) B01J 19/00 (2006.01) B01J 19/02 (2006.01) B01J 19/18 (2006.01) C09C 1/24 (2006.01) C09C 1/36 (2006.01)
Patent
CA 2560304
It is disclosed a process for the production of titanium dioxide comprising the following steps: (a) a titanium ore containing iron, preferably ilmenite, is reacted with an aqueous NH4F solution; (b) the aqueous suspension thus obtained is filtered with consequent separation of a sludge fraction, which contains ammonium fluoroferrates, and a filtrate fraction, which contains ammonium fluorotitanates; (c) the filtrate fraction thus obtained is subjected to an hydrolysis reaction; (d) the thus-obtained solid component is subjected to a thermal hydrolysis reaction. The plant and the reactors for performing the above process are also disclosed.
L'invention concerne un procédé de production d'oxyde de titane qui comprend les étapes suivantes : (a) faire réagir un minerai de titane contenant du fer, de préférence de l'ilménite, avec une solution aqueuse à base de NH¿4?F ; (b) filtrer la suspension aqueuse ainsi obtenue de façon à entraîner la séparation d'une fraction boueuse, qui contient des fluoroferrates d'ammonium, et d'une fraction de filtrat, qui contient des fluoroferrates d'ammonium ; (c) soumettre la fraction de filtrat ainsi obtenue à une réaction d'hydrolyse ; (d) soumettre le composant solide ainsi obtenu à une réaction d'hydrolyse thermique. L'invention concerne également la plante et les réacteurs pour mettre en oeuvre le procédé selon l'invention.
Gordienko Pavel S.
Sinkov Gennadi V.
Breton Spa
Marks & Clerk
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