Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Reexamination Certificate
2005-06-14
2005-06-14
Silverman, Stanley S. (Department: 1754)
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
C210S912000, C252S183140, C252S184000, C423S511000
Reexamination Certificate
active
06906235
ABSTRACT:
Novel iron sulfides having excellent durability and excellent treating properties of heavy metals, processes for producing the iron sulfides, iron sulfide mixture, a heavy metal treating agent containing either of these novel iron sulfides as an effective component, and a method by which wastes containing various heavy metals are treated with the heavy metal treating agent are disclosed. The iron sulfide having a mackinawite structure which contains FeMxNySzwherein M represents an alkaline earth metal, N represents an alkali metal, and x, y and z, indicating the molar proportions of the respective elements, represent numbers satisfying 0.01<x≦0.5, y≦0.2 and 0.7≦z≦1.4, as an essential component.
REFERENCES:
patent: 3740331 (1973-06-01), Anderson et al.
patent: 3970738 (1976-07-01), Matsui et al.
patent: 4102784 (1978-07-01), Schlauch
patent: 5494703 (1996-02-01), Evangelou
patent: 5877393 (1999-03-01), Webster
patent: 6139753 (2000-10-01), Taylor
patent: 6153108 (2000-11-01), Klock et al.
patent: 47-31806 (1972-11-01), None
patent: 48-11291 (1973-02-01), None
patent: 48-59005 (1973-08-01), None
patent: 49-31152 (1974-03-01), None
patent: 49-43472 (1974-11-01), None
patent: 50-13294 (1975-02-01), None
patent: 50-96053 (1975-07-01), None
patent: 52-113559 (1977-09-01), None
patent: 52-126685 (1977-10-01), None
patent: 52-148473 (1977-12-01), None
patent: 53-102273 (1978-09-01), None
patent: 53-122673 (1978-10-01), None
patent: 60-227881 (1985-11-01), None
patent: 63-111990 (1988-05-01), None
patent: WO 96/14901 (1996-05-01), None
English translation, dated May 2004, of JP 48-59005, originally published Aug. 18, 1973.
J.C. Ward, The Structure and Properties of Some Iron Sulphides, Rev. Pure and Appl. Chem., 20, 175 (1970), pp. 176-207.
A. R. Lennie et al., Synthesis and Rietveld Crystal Structure Refinement of Mackinawite, Tetragonal FeS, Mineralogical Magazine, Dec., vol. 59, pp. 677-683.
Cynthia A. Coles et al., Lead and Cadmium Interactions with Mackinawite: Retention Mechanisms and the Role of pH, Environ. Sci. Technol. 2000, 34, pp. 996-1000.
Claims of CA 1069626, corresponding to JP-A 52-148473.
Structural and magnetic studies on heavy-metal-adsorbing iron sulphide nanoparticles produced by sulphate-reducing bacteria; Journal of Magnetism and Magnetics Materials, Elsevier Science Publishers, Amsterdam, NL, vol. 214, No. 1-2, May 2000; pp. 13-30 XP004198442.
Funakoshi Hajime
Takahashi Mitsuru
LandOfFree
Iron sulfide mixtures; iron sulfide heavy metal treating... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Iron sulfide mixtures; iron sulfide heavy metal treating..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iron sulfide mixtures; iron sulfide heavy metal treating... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3466110