Method and apparatus for producing a metal hydroxide

Details Method and apparatus for producing a metal hydroxide Method and apparatus for producing a metal hydroxide

C - Chemistry, Metallurgy

01

F

C01F 5/22 (2006.01) B01D 61/04 (2006.01) B01D 61/14 (2006.01) B01D 61/58 (2006.01) C01B 13/36 (2006.01)

Patent

CA 2479391

The invention relates to a method and a device for producing a metal hydroxide, especially magnesium hydroxide, from a salt solution. The metal is first precipitated from the salt solution and the suspension obtained in this way is then filtered. The aim of the invention is to provide a method and a device by which means a highly pure metal hydroxide, especially magnesium hydroxide, can be easily, economically and rapidly produced. To this end, the suspension is filtered by means of at least one filter (13 - 17) pertaining to a cross-flow filtration installation (13 - 17), and a permeate created by the filtering of the suspension is redirected to the cross-flow filtration installation (14 - 17).

L'invention concerne un procédé et un dispositif de production d'un hydroxyde métallique, notamment d'un hydroxyde de magnésium, à partir d'une solution saline. Tout d'abord, le métal est précipité de la solution saline puis la suspension ainsi obtenue est filtrée. L'invention vise à proposer un procédé et un dispositif permettant la production simple, économique et rapide d'un hydroxyde métallique, notamment d'un hydroxyde de magnésium, de grande pureté. A cet effet, la suspension est filtrée par au moins un filtre (13 - 17) d'une installation de filtration tangentielle (13 - 17) et un perméat, généré par la filtrage de la suspension, est renvoyé à l'installation de filtration tangentielle (14 - 17).

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