Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Reexamination Certificate
2006-04-25
2009-11-10
King, Roy (Department: 1793)
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
C423S023000, C423S027000, C423S034000, C423S037000, C423S042000, C423S043000, C423S087000
Reexamination Certificate
active
07615199
ABSTRACT:
The invention relates to a method for the treatment of material containing at least one valuable metal and arsenic to form a valuable metal-depleted scorodite sediment and a pure aqueous solution to be discharged from the process. According to the method, the valuable metals are first removed from the material to be treated and then arsenic precipitation from the solution is performed in two stages. By means of the method, the aim is to obtain as low a valuable metal content as possible in the scorodite sediment that will be formed. Likewise, the arsenic and valuable metal content of the aqueous solution that is formed during arsenic precipitation also remains so low that the water can be released into the environment.
REFERENCES:
patent: 4572822 (1986-02-01), Abe et al.
patent: 6406676 (2002-06-01), Sundkvist
patent: 7314604 (2008-01-01), Harvey et al.
patent: 2384664 (2001-04-01), None
Wang et al, “Arsenic fixation in metallurgical plant effluents in the form of crystalline scorodite via a non-autoclave oxidation-precipitation process”, Mar. 1, 2000, Annual Meeting for the Society for Mining, Metallurgy and Exploration, pp. 225-237.
Q. Wang et al., “Arsenic Fixation in Metallurgical Plant Effluents in the Form of Crystalline Scorodite via a Non-Autoclave Oxidation-Precipitation Process”, Minor Elements 2000, pp. 225-237, Society for Mining, Metallurgy, and Exploration, Inc.
W. Qiankun et al., “A Novel Hydrometallurgical Process for the Immobilization of Arsenic”, Proceedings of the Third International Conference on Hydrometallurgy, Kunming, China, Nov. 1998, pp. 543-553, International Academic Publishers, The People's Republic of China.
G.P. Demopoulos et al., “Options for the Immobilization of Arsenic as Crystalline Scorodite”, Impurity Control and Disposal in Hydrometallurgical Processes : International Symposium : 24th Annual Hydrometallurgical Meeting, Quebec, Canada, 1994, pp. 57-69, The British Library.
Mäkinen Tuula
Nupponen Raimo
Poijärvi Jaakko
Romppanen Jaana
Buchanan & Ingersoll & Rooney PC
King Roy
Outotec Oyj
Wang Xiaobei
LandOfFree
Method for the recovery of valuable metals and arsenic from... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the recovery of valuable metals and arsenic from..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the recovery of valuable metals and arsenic from... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4056185