A process for the production of titanium products

C - Chemistry – Metallurgy – 01 – G

Patent

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Details

C01G 23/00 (2006.01) C01G 23/04 (2006.01) C01G 23/053 (2006.01) C01G 49/00 (2006.01) C01G 49/14 (2006.01)

Patent

CA 2625487

The invention provides a method for the Industrial purification of a titanium feed stream of purity P1 , by the formation of a titanium-double-salt precipitate of purity P2 and a titanium solution with purity P3, wherein P2>P1 >P3, the method comprising the steps of: i. forming, from the feed, a medium comprising water, titanium ion, a cation selected from the group consisting of ammonium, cations of alkali metals, protons and a combination thereof, and an anion selected from the group consisting of OH, SO4, HSO4, halides and a combination thereof, which formed medium is further characterized by the presence of (a) a double-salt precipitate comprising titanium ion, at least one of the cations and at least one of the anions; and (b) a titanium solution; and wherein the concentration of the anion in the titanium solution is higher than 15% and the ratio between the concentrations of the cation and the anion in the titanium solution is higher than 0.2 and lower than 1.6; and ii. separating at least a portion of the precipitate from the solution.

L'invention porte sur un procédé de purification industrielle d'un courant d'amenée de titane de pureté P1, par formation d'un précipitat de sel double de titane de pureté P2 et d'une solution de titane de pureté P3, P2>P1 >P3. Ce procédé consiste à: i) former, à partir du courant d'amenée, un milieu comprenant de l'eau, un ion de titane, un cation sélectionné dans le groupe comprenant ammonium, des cations de métaux alcalins, des protons et une combinaison de ceux-ci, et un anion sélectionné dans le groupe comprenant OH, SO4, HSO4, des halogénures et une combinaison de ceux-ci, le milieu ainsi formé étant également caractérisé par la présence (a) d'un précipitat de sel double contenant un ion de titane, au moins un des cations et au moins un des anions et (b) une solution de titane. La concentration de l'anion dans la solution de titane est supérieure à 15 % et le rapport entre les concentrations du cation et de l'anion dans la solution de titane est supérieur à 0,2 et inférieur à 1,6; et ii) séparer au moins une partie du précipitat de la solution.

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