Invention Grant
- Patent Title: Methods of treatment of chromite ore processing residue
- Patent Title (中): 铬铁矿加工残渣处理方法
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Application No.: US11578621Application Date: 2005-09-07
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Publication No.: US07670576B2Publication Date: 2010-03-02
- Inventor: Steven A. Chisick , Timothy Clark Heffernan , Thomas P. McCullough , Gary Joel Meyer
- Applicant: Steven A. Chisick , Timothy Clark Heffernan , Thomas P. McCullough , Gary Joel Meyer
- Applicant Address: US IN Indianapolis
- Assignee: Redox Solutions, LLC
- Current Assignee: Redox Solutions, LLC
- Current Assignee Address: US IN Indianapolis
- Agency: Barnes & Thornburg LLP
- International Application: PCT/US2005/031984 WO 20050907
- International Announcement: WO2006/031590 WO 20060323
- Main IPC: C02F1/52
- IPC: C02F1/52
Abstract:
Methods to reduce hexavalent chromium (Cr(VI)) in chromite processing wastes include one or more of the following steps: contacting the chromite processing wastes with an oxygen scavenger or chemical reducer; permitting the chromite processing wastes to react with the oxygen scavenger or chemical reducer; contacting the chromite processing wastes with ferrous ion; contacting the chromite processing wastes with sulfide ion; and, contacting the chromite processing wastes with ferrous sulfide.
Public/Granted literature
- US20070224097A1 Methods of Treatment of Chromite Ore Processing Residue Public/Granted day:2007-09-27
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