Liquid purification or separation – Processes – Ion exchange or selective sorption
Reexamination Certificate
2005-02-08
2005-02-08
Hopkins, Robert A. (Department: 1724)
Liquid purification or separation
Processes
Ion exchange or selective sorption
C210S675000, C210S682000, C210S688000, C210S483000, C423S006000, C423S020000
Reexamination Certificate
active
06852233
ABSTRACT:
An object of the present invention is to provide a structure of a metal collecting material for use in seawater or river water or industrial wastewater to give the most excellent adsorption efficiency. Another object of the present invention is to provide a process for efficiently separating and recovering valuable metals or noxious metals from a metal collecting material having collected said valuable metals from seawater or noxious metals from river water or wastewater with the least possible waste generation.A metal collector according to an aspect of the present invention is formed by stacking at least partially alternate layers of a fibrous metal collecting material with a spacer for introducing a liquid to be treated into said collecting material, wherein the area of spacer side faces represents 25-75% of the total area of collecting material side faces and spacer side faces in the side faces of the stack. A process for eluting and recovering a metal from a metal collecting material according to another aspect of the present invention comprises the steps: (1) contacting the metal collecting material having absorbed a metal with a dilute eluent, (2) contacting the metal collecting material with an eluent more concentrated than in step 1 to recover the metal into the eluent; and (3) contacting a metal resorbing material with the eluate from step 2 to resorb the metal.
REFERENCES:
patent: 2706701 (1955-04-01), Beller et al.
patent: 2826532 (1958-03-01), Hosmer
patent: 2900305 (1959-08-01), Siggia
patent: 3660283 (1972-05-01), Ryan
patent: 5126272 (1992-06-01), Kingston et al.
patent: 51-067216 (1974-12-01), None
patent: 52-138062 (1977-11-01), None
patent: 56-087634 (1981-07-01), None
patent: 58-205545 (1983-11-01), None
patent: 01-141816 (1989-06-01), None
patent: 9-290272 (1997-11-01), None
Toshiya Takeda, et al., Ind. Eng. Chem. Res., vol. 30, No. 1, pp. 201-206, “Adsorption and Elution in Hollow-Fiber-Packed Bed for Recovery of Uranium From Seawater”, 1991.
Takashi Kawakami, et al., Ebara Corporation Report, No. 176, pp. 40-48, “A Study on the Recovery of Rare Metals From Seawater”, Jul. 1997(with partial English translation).
Meiji Seika, pp. 1-2, “External Disinfectant Isodine Solution”, Feb. 1996 (with partial English translation).
Hans-Uwe Schenck, et al., Journal of Pharmaceutical Sciences, vol. 68, No. 12, pp. 1505-1509, “Structure of Polyvinylpyrrolidone-Iodine (Povidone-Iodine)”, Dec. 1979.
Akahori Masaji
Fujiwara Kunio
Hasegawa Keiji
Hasegawa Shin
Kanno Junichi
Ebara Corporation
Hopkins Robert A.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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