Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Reexamination Certificate
2006-09-19
2006-09-19
Nazario-Gonzalez, Porfirio (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
C556S107000, C556S116000, C210S688000, C534S015000
Reexamination Certificate
active
07109366
ABSTRACT:
The present invention provides a composition and process using the composition for removing metal ions from aqueous process solutions. These compositions include a non-metallic compound and a suitable carrier. In one embodiment, the non-metallic compound is a thiuram. In another embodiment, the non-metallic compound can further include a dithiocarbamate. These compositions are contacted with the metal ions in the aqueous process solution having a wetting agent to form an organometallic complex precipitate. The precipitate can then be separated from the aqueous solution.
REFERENCES:
patent: 1855035 (1932-04-01), Vignos
patent: 3951790 (1976-04-01), Fujisawa et al.
patent: 3966601 (1976-06-01), Stevenson et al.
patent: 4032416 (1977-06-01), Cutler
patent: 4048416 (1977-09-01), Axen et al.
patent: 4053400 (1977-10-01), Merker et al.
patent: 4133755 (1979-01-01), Tarao et al.
patent: 4239865 (1980-12-01), Tarao et al.
patent: 4971775 (1990-11-01), Hoy et al.
patent: RE34272 (1993-06-01), Michaud et al.
patent: 5492620 (1996-02-01), Evans
patent: 5578195 (1996-11-01), Tissler et al.
patent: 5615862 (1997-04-01), Gaudette
patent: 5649895 (1997-07-01), Fix et al.
patent: 5665324 (1997-09-01), Izawa et al.
patent: 5772776 (1998-06-01), Holbein
patent: 5908559 (1999-06-01), Kresiler
patent: 5969019 (1999-10-01), Kanai et al.
patent: 6274045 (2001-08-01), Kreisler
patent: 6521131 (2003-02-01), Hamilton et al.
patent: 2006/0060538 (2006-03-01), Morton
patent: 1069008 (1993-02-01), None
patent: 0116989 (1984-08-01), None
patent: 52094888 (1977-08-01), None
patent: 53015283 (1978-02-01), None
patent: 53149189 (1978-12-01), None
patent: 52061124 (1997-05-01), None
patent: 9066275 (1997-11-01), None
patent: 2001288579 (2001-10-01), None
patent: 8501079 (1985-07-01), None
patent: 1727054 (1992-04-01), None
Victoriano et al., Inorg. Chem., vol. 37, No. 8, pp. 2060-2062 (1998).
Chung Chieh., Canadian Journal of Chemistry, vol. 55, No. 7, pp. 1115-1119 (1977).
Contreras et al., J. Inorg. Nucl. Chem., vol. 33, pp. 1337-1343 (1971).
Fernandez et al., Inorg. Chem., vol. 37, No. 21, pp. 5532-5536 (1998).
Yoshida, H. et al., “Extraction of Several Metallic Complexes With Tetraethylthiuram Disulfide”, Bunseki Kagaku, 1967, vol. 16(6), pp. 605-607.
Kakowski, I.A., “Reaction Between Disulfides and the Surfaces of Metals”, Revista Minelo, 1957, vol. 8, pp. 499-502.
Mendoza, C.S. et al., “Silver Extraction for Pollution Control of Photographic Fixing Solution with Tetramethylthiuram Disulfide”, Bulletin of the Chemical Society of Japan, 1996, vol. 69(12), pp. 3499-3504.
Mendoza, C.S. et al., “Thiuram Sulfides as a Reagent for the Solvent Extraction of Silver”, Analytical Sciences, 1996, vol. 12(6), pp. 969-972.
Kobayashi, N. et al., “Sulfur-Containing Polymers XIX. Adsorption of Mercury From Aqueous Solutions By Thiuram Polysulfide Polymers”, Journal of Polymer Science, Polymer Letters Edition, 1977, vol. 15(3), pp. 137-140.
U.S. Appl. No. 10/211,471, filed Aug. 1, 2002, Inventor: Peter Morton, Title: Process for Reducing the Passive Layer From the Surface of a Metal.
U.S. Appl. No. 10/211,406, filed Aug. 1, 2002, Inventor: Peter Morton, Title: Compositions for Removing Metal Ions From Aqueous Process Solutions and Methods of use Thereof.
Lezzi et al., Chelating Resins Supporting Dithiocarbanate and Methylthiourea Groups in Adsorption of Heavy Metal Ions, 1994 Journal of Applied Polymer Science, vol. 54, pp. 889-897.
EP Search Report dated Oct. 5, 2005.
Canadus Technologies LLC
Dergosits Michael E.
Dergosits & Noah LLP
Nazario-Gonzalez Porfirio
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