Method for producing ammonium hexachlororuthenate and...

Details Method for producing ammonium hexachlororuthenate and... Method for producing ammonium hexachlororuthenate and...

C - Chemistry, Metallurgy

01

C

C01C 1/28 (2006.01) C01G 55/00 (2006.01) C30B 7/14 (2006.01) C30B 29/12 (2006.01)

Patent

CA 2619259

Ammonium hexachlororuthenate is produced by adding ammonium chloride to a hydrochloric acid solution containing ruthenium. The ammonium hexachlororuthenate is baked to obtain the ruthenium powder. When the moisture content of the ammonium hexachlororuthenate is high, the baked product is so hard sintered product that its pulverization is not easy. In accordance with the present invention, the following steps are carried out. Hydrochloric acid solution containing ruthenium is held at a temperature of 80 to 95°C for three hours or longer. The ammonium chloride is then added to the hydrochloric acid solution which is stirred by a stirring mill at the rotation of 200 revolutions per minute or more. The hydrochloric acid solution is held at a temperature of from 85 to 95°C for 1 hour while being stirred at 200 rpm. The resultant precipitate of ammonium hexachlororuthenate is filtered. The inventive crystals of precipitated ammonium hexachlororuthenate has 10 mass % or less of moisture content.

De l'hexachlororuthénate d'ammonium est produit en ajoutant du chlorure d'ammonium à une solution d'acide chlorhydrique contenant du ruthénium. L'hexachlororuthénate d'ammonium est cuit afin d'obtenir la poudre de ruthénium. Quand la teneur en eau de l'hexachlororuthénate d'ammonium est élevée, le produit cuit devient si dur que sa pulvérisation n'est pas facile. Selon la présente invention, les étapes suivantes sont réalisées. Une solution d'acide chlorhydrique contenant du ruthénium est maintenue à une température de 80 à 95 degré C pendant trois heures ou plus. Le chlorure d'ammonium est ensuite ajouté à la solution d'acide, puis mélangé au moyen d'un agitateur à la vitesse de 200 tours par minute ou plus. La solution d'acide chlorhydrique est maintenue à une température de 85 à 95 degré C pendant 1 heure pendant qu'elle est agitée à 200 tr/min. Le précipité obtenu d'hexachlororuthénate d'ammonium est filtré. Ces cristaux inventifs d'hexachlororuthénate d'ammonium précipité ont une teneur en eau de 10 % ou moins en poids.

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