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:
Nov. 18, 2008
Filed:
Mar. 31, 2006
Mahmoud Wazne, New York, NY (US);
Dimitris Dermatas, Hoboken, NJ (US);
Dilhan M. Kalyon, Teaneck, NJ (US);
Xiaoguang Meng, Highland Park, NJ (US);
Maria Kaouris, Basking Ridge, NJ (US);
John J. Morris, Oakland, NJ (US);
Mahmoud Wazne, New York, NY (US);
Dimitris Dermatas, Hoboken, NJ (US);
Dilhan M. Kalyon, Teaneck, NJ (US);
Xiaoguang Meng, Highland Park, NJ (US);
Maria Kaouris, Basking Ridge, NJ (US);
John J. Morris, Oakland, NJ (US);
The Trustees of Stevens Institute of Technology, Hoboken, NJ (US);
Abstract
A process for stabilizing chromium in a chromite ore processing residue (COPR) comprises the steps of adding an acid to consume the excess alkalinity of the COPR, resulting in a pH of less than 10; and adding a chemical reductant to the COPR to convert any hexavalent chromium present to trivalent chromium. A source of sulfate may be added to the COPR to reduce heave potential and improve its geotechnical stability. Treated COPR may be encapsulated in a material suitable to prevent contact between the COPR and water, such as an asphalt.