The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 1984
Filed:
Sep. 23, 1981
Attilio Passariello, Tivoli, IT;
Ammonia Casale S.A., Lugano, CH;
Abstract
A spherical cerium-activated catalyst for the NH.sub.3 synthesis is prepared by: mixing magnetite with (by weight): 2-3.5% of aluminium oxide, 0.8-2% potassium 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%; pelletising the so added powder in a tray pelletiser to obtain a sphere shaped catalyst; drying said catalytic spheres in a furnace at 100.degree.-200.degree. C., and sintering them in an argon atmosphere at a temperature of 1250.degree.-1350.degree. C.