Spherical cerium-activated catalyst for ammonia synthesis and pr

Details Spherical cerium-activated catalyst for ammonia synthesis and pr Spherical cerium-activated catalyst for ammonia synthesis and pr

1980-02-01

1981-12-29

Vertiz, O. R.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252462, 423363, B01J 2906

Patent

active

043081746

ABSTRACT:
A spherical cerium-activated catalyst for the NH.sub.3 synthesis is prepared by: mixing magnetite with (by weight): 2-3.5% of aluminum oxide, 0.8-2% potasium hydroxide, 2-3.5% calcium oxide, 0.1-0.4% magnesium oxide and 0.2-0.5% silica; melting this mixture in a furnace at a temperature of at least 1600.degree. C.; air-cooling the molten mass, removing melted slag; crushing the deslagged mass in a crusher and pulverizing it in a rod-mill; adding in a mixer to the so obtained powder a cerium nitrate solution in quantities to obtain in the final catalyst a metallic cerium concentration of 0.5 to 2.5%; pelletizing the so added powder in a tray pelletizer to obtain a sphere shaped catalyst; drying said catalytic spheres in a furnace 100.degree.-200.degree. C.,and sintering them in an argon atmosphere at a temperature of 1250.degree.-1350.degree. C.

REFERENCES:
patent: 3243386 (1966-03-01), Nielsen et al.
patent: 3951862 (1976-04-01), Sze
patent: 3992328 (1976-11-01), Sze et al.
patent: 4073749 (1978-02-01), Passariello

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