METHOD FOR PRODUCING LANTHANUM RUTHENATE

PROBLEM TO BE SOLVED: To provide a method for producing a ruthenate having high purity, high crystallinity, a large specific surface area, and high heat resistance, and to obtain a ruthenate catalyst obtained by the method. SOLUTION: In the method for producing a perovskite-type lanthanum ruthenate...

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Hauptverfasser:	WATANABE AKIO, MIHASHI TAKEFUMI, NITIN LABHSETWAR
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F INORGANIC CHEMISTRY METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for producing a ruthenate having high purity, high crystallinity, a large specific surface area, and high heat resistance, and to obtain a ruthenate catalyst obtained by the method. SOLUTION: In the method for producing a perovskite-type lanthanum ruthenate crystal expressed by the formula: La3.5Ru4O13(La is 12-O-coordinated lanthanum; Ru is 6-O-coordinated ruthenium; O is oxygen), lanthanum hydroxide and ruthenium hydroxide are produced by reacting an aqueous solution containing La ions and an aqueous solution containing Ru ions with a precipitation forming liquid in a reactor, and the resultant precipitate is heated and crystallized. COPYRIGHT: (C)2004,JPO