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. 24, 2004
Filed:
May. 14, 1998
Applicant:
Inventor:
Richard A. Hayden, Pittsburgh, PA (US);
Assignee:
Calgon Carbon Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 5/338 ;
U.S. Cl.
CPC ...
B01D 5/338 ;
Abstract
A method is provided for reducing the chemical conversion of oxidizable or disproportionable compounds contained in liquid or gaseous process media which contact carbonaceous chars. In this method the carbonaceous char contacting the oxidizable or disproportionable compounds is first treated with a non-nitrogen-containing Bronsted acid. The acid-treated char is then heated to temperatures greater than 750° C. In this manner the inherent catalytic reactivity of the carbon in the char is reduced effectively and largely irreversibly.