Japanese Patent JPH054930

B2

PURPOSE:To simply separate U and trace rare earth elements also without necessitating a large apparatus by adding chelating agent to an oxidizing soln. contg. U and rare earth element and then adding with aq. ammonia or gaseous ammonia. CONSTITUTION:The U is precipitated as ammonium diuranate by adding the chelating agent to the oxidizing soln. contg. U and rare earth element and then adding the aq. ammonia and/or the gaseous ammonia. By means of the above-mentioned process, trace rare earth element is efficiently separated with an extremely simple operation. Then, ethylendiaminetetraacetic acid or diethylenetriaminepentaacetic acid, etc, is exemplified as the chelating agent.

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SAKAKIBARA MASANAO
SUZUKI NOBUYUKI
SUZUKI SHUICHI
PPONDA TADASHI
SEKIDA TAKENORI
TSUNEI MASAO
KUROSAWA JUICHI

JP7371287A

January 21, 1993

March 27, 1987

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GENSHI NENRYO KOGYO

C01F17/00; C01G43/00; C22B59/00; C22B60/02

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