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:
Apr. 28, 1981
Filed:
Sep. 25, 1979
Applicant:
Inventors:
Frank C Haas, Arvada, CO (US);
Manuel M Gutierrez, Westminster, CO (US);
Assignee:
Tosco Corporation, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423461 ;
Abstract
The present invention relates to a method for removing zinc from solid carbon black, preferably obtained from the pyrolysis of rubber, said carbon black containing at least 3%, by weight, of zinc, calculated as ZnO, said method including the steps of contacting the carbon black at a temperature of at least 750.degree. C. with a gas selected from chlorine and hydrogen chloride to form gaseous zinc chloride from the zinc contained in said carbon black, and separating the gaseous zinc chloride from the solid carbon black.