Title: Process for treatment of rare earth metals
Application Number: 86105862 Application Date: 1986.09.09
Publication Number: 1009532 Publication Date: 1987.03.18
Approval Pub. Date: 1991.04.10 Granted Pub. Date: 1991.04.10
International Classifi-cation: C01F17/00;C22B59/00
Applicant(s) Name: Rhone-Poulenc Specialites Chimiques Address:
Inventor(s) Name: Claude Magnier;Frederic Fabre;Jean-Poul Tognet
Attorney & Agent: WU DAJIAN QUAN JING
Abstract:
    A method of treating an ore containing lanthanides and yttrium, including a first stage comprising grinding the ore, followed by a second stage comprising reacting the ground ore with a concentrated aqueous alkali metal hydroxide solution at an elevated temperature, characterised in that grinding is carried out in the presence of a concentrated aqueous alkali metal hydroxide solution at a temperature of up to 100 DEG C.
Time: 10