Chemistry of inorganic compounds – Sulfur or compound thereof – Oxygen containing
Reexamination Certificate
2006-05-02
2006-05-02
Silverman, Stanley S. (Department: 1754)
Chemistry of inorganic compounds
Sulfur or compound thereof
Oxygen containing
C423S099000, C423S475000, C423S501000, C423S658500, C423SDIG014
Reexamination Certificate
active
07037482
ABSTRACT:
A method of extracting a halide and sulphate from an aqueous sulphate solution, such as a zinc sulphate solution, comprises subjecting the solution to solvent extraction to extract halide and sulphate from the solution and controlling the amount of sulphate extracted by selective adjustment of the acidity of the aqueous solution.
REFERENCES:
patent: 1901925 (1933-03-01), O'Brien et al.
patent: 2864668 (1958-12-01), Baldwin
patent: 3055754 (1962-09-01), Fletcher
patent: 3211526 (1965-10-01), Crouse, Jr.
patent: 3393046 (1968-07-01), Giganov et al.
patent: 3582290 (1971-06-01), Grinstead
patent: 3666446 (1972-05-01), Cook et al.
patent: 3923976 (1975-12-01), Vega et al.
patent: 4005174 (1977-01-01), Bodson
patent: 4203964 (1980-05-01), Reinhardt et al.
patent: 4882134 (1989-11-01), Mizrahi
patent: 5192443 (1993-03-01), Delloye et al.
patent: 5597545 (1997-01-01), Chang et al.
patent: 5632966 (1997-05-01), Van Der Puy et al.
patent: 5788844 (1998-08-01), Olafson
patent: 5980753 (1999-11-01), Itano et al.
patent: 6200545 (2001-03-01), Dreisinger
patent: 6375923 (2002-04-01), Duyvesteyn et al.
patent: 6440224 (2002-08-01), Wei et al.
patent: 6579377 (2003-06-01), Wei et al.
patent: 6692709 (2004-02-01), Nakon
patent: 2136557 (1972-02-01), None
patent: 1366380 (1974-09-01), None
patent: 1371302 (1974-10-01), None
patent: 51-75617 (1976-06-01), None
patent: 496237 (1976-04-01), None
patent: 667500 (1979-06-01), None
patent: 861313 (1981-09-01), None
patent: 994410 (1983-02-01), None
Chemical Land21.com printout for Tributyl Phosphate (downloaded from www.chemicalland21.com on Sep. 30, 2004).
English Translation of DE 2 136 557, published Feb. 1972.
English Translation of SU 1186678, published Oct. 1985.
Tang et al., “Study on extraction of zinc in sulfate under low pH conditions”, Youse Jinshu, Yelian Bufen (Non-ferrous Metal), vol. 5, pp. 2-4, 2001.
English Translation of JP 51-75617, published Jun. 1976.
Hardwick, W.H.; Wace, P.F., “Hydrofluoric Acid Recovery by Amine Solvent Extraction”, Chemical and Process Engineering, Jun. 1965, p. 283.
Alguacil, F.J.; Lopez, F.A., “The extraction of mineral acids by the phosphine oxide Cyanex 923”, Hydrometallurgy 42 (1996) 245-255.
“The Recovery of Mineral Acids with CYANEX 923 Extractant”, Technical Bulletin 89-01, Cyanamid, Niagara Falls, Canada.
Rickelton, W.A., “The Extraction of Mineral Acids with a Liquid Phosphine Oxide”, Solvent Extraction in the process industries, Proceedings of ISEC'93, eds.: Logsdail D.H.; Slater, M.J., 731, 2, 1993.
Wisniewski, Maciej, “Extraction of arsenic from sulphuric acid solutions by Cyanex 923”, Hydrometallurgy 46 (1997) 235-241.
Liao, W. Guihong, Y; Li, D., “Solvent extraction of cerium (IV) and fluorine (1) from sulphuric acid leaching of bastnasite by Cyanex 923”, Solvent Extraction and Ion Exchange, 2001, 19, 243-259.
Hesford, E.; McKay H.A.C., “The Extraction of Mineral Acids by Tri-n-Butyl Phosphate”, Atomic Energy Research Establishment, Harwell, Didcot, Berks, Received Aug. 29, 1959, pp. 156-164.
Dreisinger David B.
Grinbaum Baruch
Harlamovs Juris R.
Mason Cashman R. S.
de Kock Elbie R.
Hertzog Ardith E
Russell Reyneke Law Corp.
Silverman Stanley S.
Teck Cominco Metals Ltd.
LandOfFree
Solvent extraction of a halide from a aqueous sulphate solution does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solvent extraction of a halide from a aqueous sulphate solution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solvent extraction of a halide from a aqueous sulphate solution will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3526289