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:
Oct. 04, 1983
Filed:
Jan. 19, 1982
Applicant:
Inventor:
Attilio Passariello, Tivoli, IT;
Assignee:
Ammonia Casale S.A., Lugano, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ;
U.S. Cl.
CPC ...
502243 ; 502251 ;
Abstract
In the process for the preparation of catalysts for heterogeneous synthesis, particularly for the ammonia synthesis, in which a mixture of magnetite and oxides of calcium, aluminium, potassium and silicon is molten, the molten mass is air cooled, freed from the slag, crushed and powdered, the so obtained powders are pelletized and the prepared spheres are dried and sintered in an argon atmosphere, the improvement consisting in that the crushing is carried to a content of at least 80% of fine powders with a granulometry of from 325 to 400 mesh.