| abstract |
The present invention provides a practically usable method capable of efficiently recovering a rare metal by utilizing a mechanochemical reaction. A rare metal oxide powder is obtained by a mechanochemical reaction of a rare metal oxide powder with a lanthanoid element powder in an atmospheric pressure atmosphere. As the lanthanoid element powder, cerium is preferable. As rare metals, it is possible to recover indium, tin, antimony, etc., and the mechanochemical reaction is preferably carried out with mechanical stirring, and this method recovers rare metals from waste liquid crystal panels, etc. It is also useful to do. [Selection figure] None |