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. 29, 1991
Filed:
Jan. 30, 1990
Applicant:
Inventor:
Azza A Elattar, Niagara Falls, NY (US);
Assignee:
Elkem Metals Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; B01J / ; B01J / ;
U.S. Cl.
CPC ...
502244 ; 502214 ; 502241 ; 502242 ;
Abstract
The active mass is produced by first forming a contact mass of particulate silicon metal and particulate copper catalyst and then heating the contact mass at a temperature of between 250.degree.-335.degree. C. in the presence of methylchloride to form the active mass. Zinc can be added to the contact mass.