PRODUCTION OF RARE EARTH ELEMENT-AMMONIUM COMPLEX OXALATE, USE OF THE SAME FOR PRODUCTION OF RARE EARTH ELEMENT OXIDE, OBTAINED COMPLEX OXALATE AND OXIDE

Title:

PRODUCTION OF RARE EARTH ELEMENT-AMMONIUM COMPLEX OXALATE, USE OF THE SAME FOR PRODUCTION OF RARE EARTH ELEMENT OXIDE, OBTAINED COMPLEX OXALATE AND OXIDE

Document Type and Number:

Japanese Patent JPH0725612

Kind Code:

A

Abstract:

PURPOSE: To manufacture a rare earth element-ammonium complex oxalate having a narrow grain size distribution by adding a rare earth element compound soln. to a soln. containing oxalate ions and ammonium ions, separating and drying the obtained precipitates.

CONSTITUTION: A second soln. containing the rare earth element compound is added to a first soln. containing oxalate ions and ammonium ions and generated precipitates are separated and optionally dried. Thereby small planar crystallized rare earth element-ammonium complex oxalate having 0.5 to 3 μm average size and <0.7 grain size distribution coefficient is obtained. The obtained complex oxalate is calcined at 600 to 1200°C, preferably at 800 to 1000°C. Thereby a rare earth element oxide having the same grain size distribution as that described above can be obtained.

Inventors:

BERUNAARUANTOWAANU DEISOO
JIYANRIYUKU RU ROARE
BERUNAARU PAKOO
MISHIERU RIISU

Application Number:

JP2265191A

Publication Date:

January 27, 1995

Filing Date:

January 24, 1991

Export Citation:

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Assignee:

RHONE POULENC CHIMIE

International Classes:

C01F17/00; C07C55/07; (IPC1-7): C01F17/00

Domestic Patent References:

JPS6143285A	1986-03-01
JPS5528905A	1980-02-29
JPH02258624A	1990-10-19
JPS6452610A	1989-02-28
JPH04187516A	1992-07-06
JPH04187517A	1992-07-06

Attorney, Agent or Firm:

Motohiro Kurauchi (1 outside)

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