DE2014391

A process for the preparation of non-pyrophoric nickel skeleton catalysts, in which 30 to 80 percent by weight of metallic zinc, 60 to 20 percent by weight of metallic nickel and 0 to 40 percent by weight of one or more further metals soluble in alkaline solutions are heat-treated at temperatures in...

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Hauptverfasser:	CSUEROES, ZOLTAN, PETRO, JOZSEF, BEKASSY, SANDOR, MATHE, TIBOR, TUNGLER, ANTAL
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for the preparation of non-pyrophoric nickel skeleton catalysts, in which 30 to 80 percent by weight of metallic zinc, 60 to 20 percent by weight of metallic nickel and 0 to 40 percent by weight of one or more further metals soluble in alkaline solutions are heat-treated at temperatures in the range of 880 DEG to 1,120 DEG C for at least 3 minutes, preferably for 10 to 30 minutes, with simultaneous protection of the surface of the melt against oxidation, the melt thus obtained is cooled at a rate not exceeding 120 DEG /minute in the average, the alloy thus obtained is powdered or granulated, and the powdered or granulated alloy is treated with an alkali hydroxide solution of 10 - 50 percent by weight at temperatures not exceeding the boiling point of the alkaline solution.