Processes for extracting aluminum and iron from aluminous ores

Details Processes for extracting aluminum and iron from aluminous ores Processes for extracting aluminum and iron from aluminous ores

C - Chemistry, Metallurgy

22

B

C22B 21/00 (2006.01) C22B 3/10 (2006.01) C22B 3/22 (2006.01) C22B 3/38 (2006.01)

Patent

CA 2684696

There are provided processes and compositions for extracting aluminum and/or iron ions from aluminous ores or a mixture. One process comprises recovering said aluminum ions from a composition comprising said aluminum ions, said iron ions, an organic solvent and an extracting agent adapted to form an organometallic complex substantially selectively with said iron ions or with said aluminum ions which is soluble in said organic solvent. Another process for extracting aluminum from an ore comprising leaching said ore with an acid so as to obtain a leachate and a solid residue and removing at least a portion of iron ions contained in said leachate by either substantially selectively precipitating said at least a portion of said iron ions in basic conditions in which the pH is of at least 10, or substantially selectively complexmg said at least a portion of said iron ions with an extracting agent adapted to form an organometallic complex. Another process for at least partially separating aluminum ions from iron ions comprised in a composition comprises substantially selectively precipitating at least a portion of said iron ions in basic conditions in which the pH is at least 10.

L'invention porte sur des procédés et des compositions pour extraire des ions aluminium et/ou fer à partir de minerais alumineux ou d'un mélange de minerais alumineux. Un procédé comprend la récupération desdits ions aluminium à partir d'une composition comprenant lesdits ions aluminium, lesdits ions fer, un solvant organique et un agent d'extraction apte à former un complexe organométallique de manière sensiblement sélective avec lesdits ions fer ou avec lesdits ions aluminium, lequel est soluble dans ledit solvant organique. Un autre procédé pour extraire l'aluminium à partir d'un minerai comprend la lixiviation dudit minerai par un acide de façon à obtenir un lixiviat et un résidu solide, et le retrait d'au moins une partie des ions fer contenus dans ledit lixiviat soit par précipitation sensiblement sélective de ladite au moins une partie desdits ions fer dans des conditions basiques dans lesquelles le pH est d'au moins 10, soit par complexation sensiblement sélective de ladite au moins une partie desdits ions fer par un agent d'extraction apte à former un complexe organométallique. Un autre procédé pour séparer au moins partiellement des ions aluminium d'ions fer compris dans une composition comprend la précipitation sensiblement sélective d'au moins une partie desdits ions fer dans des conditions basiques dans lesquelles le pH est d'au moins 10.

Affiliated with

Also associated with

Rating

Processes for extracting aluminum and iron from aluminous ores does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processes for extracting aluminum and iron from aluminous ores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes for extracting aluminum and iron from aluminous ores will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1991220