Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2007-01-16
2007-01-16
Hopkins, Robert A. (Department: 1724)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C526S288000
Reexamination Certificate
active
10945685
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 entrapped within or supported onto a substrate. In one embodiment, the non-metallic compound is a thiuram. In another embodiment, the compositions further include non-metallic compound that is a dithiocarbamate. These compositions are contacted with the metal ions in the aqueous process solution to form an organometallic complex precipitate.
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
patent: 4053400 (1977-10-01), Merker et al.
patent: 4133755 (1979-01-01), Tarao et al.
patent: 4234455 (1980-11-01), Homeier et al.
patent: 4239865 (1980-12-01), Tarao et al.
patent: 4770788 (1988-09-01), Vignola
patent: 4971775 (1990-11-01), Hoy et al.
patent: RE34272 (1993-06-01), Michaud et al.
patent: 5492620 (1996-02-01), Evans
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: 6492525 (2002-12-01), Bertrand et al.
patent: 2005/0215814 (2005-09-01), Chaudhari et al.
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: 9066275 (1997-11-01), None
patent: 2001288579 (2001-10-01), None
patent: 8501079 (1985-07-01), None
patent: 1727054 (1992-04-01), None
EP Search Report dated Oct. 5, 2005.
Victoriano et al., “Crystal and Molecular Structures of a Neutral Pentanuclear Copper(I)—Iodide Complex,” Inorganic Chemistry, 1998, vol. 37, pp. 2060-2062.
Chieh, “Synthesis and crystal structure of diiodotetraethylthiuramdisulfidemercury(II),” Canadian Journal of Chemistry, 1997, vol. 55, No. 7, pp. 1115-1119.
Contreras et al., Transition Metal Complexes of Thiurams, Spectrochemical Studies of Chromium(III) Complexes, J. of Inorganic Chemistry, 1971, vol. 33, pp. 1337-1343.
Fernandez et al., “Dithiocarbamate Ligands as Building-Blocks in the Coordination Chemistry of Gold,” Inorganic Chemistry, 1998, vol. 37, pp. 5532-5536.
U.S. Appl. No. 10/212,028, filed Aug. 1, 2002, Inventor: Peter Morton, Title: Compositions for Removing Metal Ions From Aqueous Process Solutions and Methods of Use Thereof.
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.
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 P olymers 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.
Dergosits & Noah LLP
Hopkins Robert A.
LandOfFree
Compositions for removing metal ions from aqueous process... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compositions for removing metal ions from aqueous process..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compositions for removing metal ions from aqueous process... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3765266