Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reexamination Certificate
2011-07-05
2011-07-05
Wyszomierski, George (Department: 1733)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C075S631000
Reexamination Certificate
active
07972412
ABSTRACT:
A method for recovering at least one platinum group metal (PGM) species from a feed product selected from the group consisting of chromite ore, chromite ore concentrate and PGM concentrate comprising the steps of: mixing the feed with at least one salt so as to produce a mixture, whereby the concentration of salt in the mixture is sufficient to convert at least one PGM species into a corresponding PGM chloride salt; and contacting the mixture with gaseous chlorine and CO at a temperature between about 240° C. and 800° C. to induce the conversion of at least one species of PGM into a solid material containing a corresponding PGM chloride salt, whereby said chloride salt of at least one PGM species can be recovered.
REFERENCES:
patent: 5074910 (1991-12-01), Dubrovsky
patent: 5102632 (1992-04-01), Allen
patent: 5238662 (1993-08-01), Dubrovsky
patent: 2193783 (1998-06-01), None
patent: 2303046 (1999-03-01), None
patent: 2314581 (2001-01-01), None
patent: 1234531 (1989-09-01), None
patent: WO 97/46724 (1997-12-01), None
patent: WO 02/053788 (2002-07-01), None
patent: WO 2004/070066 (2004-08-01), None
patent: 96-2382 (1996-03-01), None
N Kanari et al, A study of chromite carbochorination kinetics, Metallurgical and Materials Transactions B, vol. 30B, (Aug. 1999), p. 577-587.
Cooper et al., J. Chem. Metal Min Soc. S.A. (1929) 220-230.
Kanari, Ph.D thèse L'institut national polytechnique de Lorraine (1995).
Kim et al , Ind. Eng Chem. Res. 39, (2000) 1185-1192.
Pascal , Masson et Cie, Nouveau traité de chimie minérale, vol. 19, (1958). 949.
Rhee et al., Metallurgical Transactions B, vol. 21B (1990): 321-330.
Rivarola et al., Lat am J.chem eng. appl. chem (1981) 11:47-52.
Vermaak , Mintek (1995) First edition: 85-91.
Zhao et al., Metallurgical Transactions B. vol. 21B (1990). 131-133.
Bergeron Mario
Richer-Lafléche Marc
Godfrey & Kahn S.C.
Kees Nicholas A.
Ressources Minieres Pro-Or Inc.
Shevin Mark L
Wyszomierski George
LandOfFree
Process for recovering platinum group metals from ores and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for recovering platinum group metals from ores and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovering platinum group metals from ores and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2698155