C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/224, 23/352,
C01B 13/14 (2006.01) B01J 2/00 (2006.01) C01B 13/18 (2006.01) C01F 11/02 (2006.01) C01F 17/00 (2006.01) C01G 25/02 (2006.01) C01G 27/02 (2006.01)
Patent
CA 1275783
PREPARATION OF UNAGGLOMERATED METAL OXIDE PARTICLES WITH UNIFORM PARTICLE SIZE ABSTRACT OF THE DISCLOSURE: Disclosed is a method for producing substantially unagglomerated submicron metal oxide particles having uniform size distribution. The process is readily adaptable to the production of multicomponent metal oxide particles. The method comprises the steps of (1) providing a solution of a complex of an oxygen-containing metal salt and a chelating agent selected from the group consisting of ethylenediaminetetraacetic acid, hydroxy ethylenediaminetetraacetic acid, nitrilotriacetic acid, diethylenetriaminepentacetic acid, glycolic acid, lactic acid, citric acid, tartaric acid, succinic acid, alkali salts of the foregoing acids, and mixtures of these (2) drying the solution by heating the solution under alkaline conditions for a time and at a temperature sufficient to remove substantially all the solvent from the solution and to leave a solid residue (3) heating the solid residue for time and at a temperature sufficient to convert at least a substantial portion of the residue to substantially unagglomerated particles of the metal oxide having a mean diameter up to about one micron and a uniform particle size.
541865
Corning Glass Works
Sim & Mcburney
Wusirika Raja R.
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