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Class Information
Number: 976/DIG.383
Name: Nuclear technology > Decontamination arrangements; treating radioactively contaminated material [g21f-9/00] > Treating liquids [g21f-9/04] > Processing [g21f-9/06] > By absorption; by adsorption; by ion exchange [g21f-9/12]

Patents under this class:
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Patent Number Title Of Patent Date Issued
5926772 Composition and process for the encapsulation and stabilization of radioactive, hazardous and mixed wastes Jul. 20, 1999
5863439 Process for separation and preconcentration of radium from water Jan. 26, 1999
5732364 Composition and process for the encapsulation and stabilization of radioactive, hazardous and mixed wastes Mar. 24, 1998
5649323 Composition and process for the encapsulation and stabilization of radioactive hazardous and mixed wastes Jul. 15, 1997
5545798 Preparation of radioactive ion-exchange resin for its storage or disposal Aug. 13, 1996
5540843 Method for preferential retention of cesium cations and their separation from other inorganic cations Jul. 30, 1996
5481064 Waste fluid treatment process Jan. 2, 1996
5476989 Adsorbent of radioactive nuclides and process for volume-reduction treatment of radioactive waste Dec. 19, 1995
5296203 Recovery of niobium from irradiated targets Mar. 22, 1994
4913835 Novel compositions and method for neutralization and solidification of hazardous alkali spills Apr. 3, 1990
4902426 Ion exchange compositions Feb. 20, 1990
4880595 Process and apparatus for cleaning nuclear reactor cooling water Nov. 14, 1989
4865761 Compositions and method for control and clean-up of hazardous acidic spills Sep. 12, 1989
4839101 Process for improving the effectiveness of the removal of zirconium from a nuclear fuel and/or fertile material solution Jun. 13, 1989
4826604 Process for separation of cesium ions from aqueous solutions May. 2, 1989
4808318 Process for cesium decontamination and immobilization Feb. 28, 1989
4800024 Removal of heavy metals and heavy metal radioactive isotopes from liquids Jan. 24, 1989
4769084 Synthetic chemical adsorbents Sep. 6, 1988
4764281 Method of removing radioactive isotopes of heavy metals Aug. 16, 1988
4762690 Process for the separation of cations from aqueous solutions Aug. 9, 1988
4737316 Purification of contaminated liquid Apr. 12, 1988
4696768 Process for the separation of large amounts of uranium from small amounts of radioactive fission products, which are present in basic, aqueous carbonate containing solutions Sep. 29, 1987
4687581 Method of separating and purifying cations by ion exchange with regenerable porous glass Aug. 18, 1987
4659512 Fixation of dissolved metal species with a complexing agent Apr. 21, 1987
4659477 Fixation of anionic materials with a complexing agent Apr. 21, 1987
4657731 Method for removing cesium from an aqueous liquid and purifying the reactor coolant in boiling water and pressurized water reactors Apr. 14, 1987
4642203 Method of treating low-level radioactive waste Feb. 10, 1987
4642193 Method for purification of the cooling water used in nuclear reactors Feb. 10, 1987
4632778 Procedure for ceramizing radioactive wastes Dec. 30, 1986
4622176 Method of processing radioactive liquid wastes containing radioactive ruthenium Nov. 11, 1986
4591455 Purification of contaminated liquid May. 27, 1986
4488964 Apparatus for removing a radioactive substance from a molten metal Dec. 18, 1984
4469629 Method for extracting fluoride ions from a nuclear fuel solution Sep. 4, 1984
4461711 Method for separating and collecting iodine Jul. 24, 1984
4448711 Process for producing zeolite adsorbent and process for treating radioactive liquid waste with the zeolite adsorbent May. 15, 1984
4432894 Process for treatment of detergent-containing radioactive liquid wastes Feb. 21, 1984
4431580 Method for purifying a nitric-acid U/Pu solution Feb. 14, 1984
4394269 Method for cleaning solution used in nuclear fuel reprocessing Jul. 19, 1983
4388231 Process for extraction of iodine Jun. 14, 1983
4377508 Process for removal of radioactive materials from aqueous solutions Mar. 22, 1983
4376066 Method for preparing a catalyst for an isotopic exchange column Mar. 8, 1983
4282092 Process for preparing inorganic particulate adsorbent and process for treating nuclear reactor core-circulating water Aug. 4, 1981
4234555 Removal of uranium from aqueous HF solutions Nov. 18, 1980
4222892 Process for preparing oxine impregnated-activated charcoal Sep. 16, 1980
4220461 Low temperature synthesis of vitreous bodies and their intermediates Sep. 2, 1980
4176158 Process for concentrating technetium-99m Nov. 27, 1979
4167491 Radioactive waste disposal Sep. 11, 1979
4156646 Removal of plutonium and americium from alkaline waste solutions May. 29, 1979
4156658 Fixation of radioactive ions in porous media with ion exchange gels May. 29, 1979
4138329 Method of treating waste water of a nuclear power plant and a system therefor Feb. 6, 1979

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