公开(公告)号：US12033766B2

公开(公告)日：2024-07-09

申请号：US17413365

申请日：2019-11-28

Applicant: FRAMATOME GMBH

Inventor： Gert Seybert ,  Robert Lehr ,  Bertram Zeiler ,  Philip Schuberth ,  Steffen Weiss

IPC: G21F9/12 ,  B01J45/00 ,  B01J49/30 ,  B01J49/50 ,  G21F9/30

CPC classification number: G21F9/12 ,  B01J45/00 ,  B01J49/30 ,  B01J49/50 ,  G21F9/30 ,  B01J2219/0879

Abstract: A method for conditioning of spent ion exchange resins from nuclear facilities comprises the steps of: mixing the spent ion exchange resins with water to form a reaction mixture; setting and controlling the pH of the reaction mixture in a range from 1.0 to 3.5, preferably in a range from 2.0 to 3.0; adding an oxidant to the reaction mixture, with the temperature of the reaction mixture maintained at 90°° C. or less so that the spent ion exchange resin and the oxidant react with each other to form an aqueous reaction solution comprising the organic reaction products of the spent ion exchange resin; and electrochemically oxidizing the organic reaction products, wherein carbon dioxide is produced and a carbon-depleted aqueous reaction solution having a TOC (total organic carbon) value of less than 50 ppm is obtained. Furthermore, an apparatus for the conditioning of spent ion exchange resins from nuclear facilities is described.

公开(公告)号：US20230220310A1

公开(公告)日：2023-07-13

申请号：US18177359

申请日：2023-03-02

Applicant: THE CLOROX COMPANY

Inventor： David R. Scheuing ,  Thomas F. Fahlen ,  Jared Heymann ,  Mike Kinsinger ,  William Ouellette ,  William L. Smith

IPC: C11D3/48 ,  C11D3/37 ,  C09D133/00 ,  C09D147/00 ,  A01N25/10 ,  A01N59/00 ,  C11D3/39 ,  C11D3/395 ,  C09D7/20 ,  C09D5/16 ,  B01J45/00 ,  C09D139/00 ,  C09D7/43 ,  C09D133/02 ,  C11D3/00 ,  C11D3/22 ,  A01N33/12 ,  B65D81/32

CPC classification number: C11D3/48 ,  C11D3/378 ,  C09D133/00 ,  C09D147/00 ,  A01N25/10 ,  A01N59/00 ,  C11D3/3942 ,  C11D3/3953 ,  C09D7/20 ,  C09D5/1662 ,  C11D3/3757 ,  C11D3/3773 ,  C11D3/3947 ,  C11D3/3776 ,  B01J45/00 ,  C09D139/00 ,  C09D7/43 ,  C11D3/3765 ,  C11D3/3769 ,  C09D133/02 ,  C11D3/0036 ,  C11D3/3956 ,  C11D3/227 ,  A01N33/12 ,  B65D81/3283

Abstract: The invention relates to compositions and methods of treatment employing compositions comprising polyelectrolyte complexes. The compositions include a water-soluble first polyelectrolyte bearing a net cationic charge or capable of developing a net cationic charge and a water-soluble second polyelectrolyte bearing a net anionic charge or capable of developing a net anionic charge. The total polyelectrolyte concentration of the first solution is at least 110 millimolar. The composition is free of coacervates, precipitates, latex particles, synthetic block copolymers, silicone copolymers, cross-linked poly(acrylic) and cross-linked water-soluble polyelectrolyte. The composition may be a concentrate, to be diluted prior to use to treat a surface.

公开(公告)号：US20220259058A1

公开(公告)日：2022-08-18

申请号：US17597690

申请日：2020-07-14

Applicant: Klinge Chemicals Limited

Inventor： Steve Lockie ,  Douglas H. Brown

IPC: C01D3/14 ,  C01D3/06 ,  C01D3/16 ,  B01J45/00 ,  B01J47/02

Abstract: A process for the preparation of purified potassium chloride comprises the at least partial removal of one or more class 1 heavy metal impurity (lead, arsenic, cadmium and/or mercury) from potassium chloride process liquor by an ion exchange step. The process uses an ion exchange resin and achieves high levels of purity and is compatible with high flow rates. A recrystallisation step (e.g. a cooling crystallization step) may be employed subsequent to the ion exchange step.

公开(公告)号：US11311833B2

公开(公告)日：2022-04-26

申请号：US16635360

申请日：2018-10-16

Applicant: Mitsubishi Heavy Industries Engineering, Ltd.

Inventor： Shinichi Okamoto ,  Shinji Nakamura ,  Takuya Hirata

IPC: B01D53/14 ,  B01J49/50 ,  B01J45/00 ,  B01D15/20 ,  B01J47/014 ,  B01D15/38 ,  B01D53/18 ,  G01N1/20 ,  G01N1/10

Abstract: A method for recovering an acidic gas, includes: a step of bringing a gas to be treated that contains an acidic gas into gas-liquid into contact with an amine absorbing solution, allowing the amine absorbing solution to absorb the acidic gas, thereby removing the acidic gas from the gas to be treated; a step of allowing the amine absorbing solution that has absorbed the acidic gas to release the acidic gas, thereby regenerating the amine absorbing solution, and at the same time, recovering the released acidic gas; and an analysis step of calculating concentrations of iron ions and/or heavy metal ions in the amine absorbing solution.

公开(公告)号：US20220072510A1

公开(公告)日：2022-03-10

申请号：US17530893

申请日：2021-11-19

Applicant: SnG Inc.

Inventor： RIICHI MIYAMOTO ,  HONGZHI BAI

IPC: B01J20/28 ,  B01J8/16 ,  B01J45/00 ,  C01B33/159 ,  G01N30/88 ,  G01N30/96 ,  B01J8/02 ,  B01J20/06 ,  B01J20/10 ,  C01G23/047

Abstract: A method for reacting a reaction object with a liquid containing the reaction object in contact with a granular porous body. The upper limit D (mm) of the particle diameter of the granular porous body is determined from D=0.556×LN (T)+0.166 in a column flow method in non-circulation type, and determined from D=0.0315×T+0.470 in the column flow method in a circulation type and a shaking method. The granular porous body includes a skeleton body including an inorganic compound having a three-dimensional continuous network structure, and has a two-step hierarchical porous structure including through-holes formed in voids in the skeleton body, and pores extending from a surface to an inside of the skeleton body and dispersed on the surface. A functional group having affinity with the metal ion is chemically modified on a surface of the granular porous body.

公开(公告)号：US20210347656A1

公开(公告)日：2021-11-11

申请号：US17241799

申请日：2021-04-27

Applicant: LG Electronics Inc.

Inventor： Suhye WOO ,  Sangduck LEE ,  Yuseung CHOI ,  Uison HWANG

IPC: C02F1/28 ,  C02F1/00 ,  C02F1/42 ,  B01J20/02 ,  B01J20/06 ,  B01J20/28 ,  B01J20/04 ,  B01J20/30 ,  B01J45/00

Abstract: Disclosed is a filter for a water-purification device, the filter including a filter housing having a water inlet and a water outlet defined therein; and a filter member disposed in the filter housing to purify water introduced through the inlet and supply the purified water to the outlet, wherein the filter member includes a carbon block produced by mixing 40 to 50% by weight of titanium oxide, 30 to 40% by weight of activated carbon, and 18 to 23% by weight of binder with each other. Further, a water-purification device including the filter is disclosed.

公开(公告)号：US11114211B2

公开(公告)日：2021-09-07

申请号：US16555140

申请日：2019-08-29

Applicant: Veolia Nuclear Solutions, Inc.

Inventor： Joshua Mertz ,  Ja-Kael Luey ,  Wes Bratton ,  Kenneth Schofield

IPC: G21F9/12 ,  B01J47/10 ,  B01J45/00 ,  B01D15/36 ,  B01D15/20 ,  B01J47/016

Abstract: Disclosed herein are systems, methods, processes, and apparatuses for treating radioactive waste, through systems designed to bind and dry radioactive media. In some of its various embodiments, the system includes at least one helical screw designed to receive and mix liquid wastes with ion exchange media, as well as convey the resulting slurry through one or more of a binding, dewatering, and drying/off-gassing region.

公开(公告)号：US11047022B2

公开(公告)日：2021-06-29

申请号：US16101807

申请日：2018-08-13

Applicant: OCP S.A.

Inventor： William W Berry ,  Thomas E. Baroody ,  Driss Dhiba ,  Mounir El Mahdi

IPC: C22B60/00 ,  C22B60/02 ,  B01J39/05 ,  B01J49/06 ,  B01J49/50 ,  B01J49/53 ,  C01B25/238 ,  C01G43/01 ,  C01G43/00 ,  B01J45/00 ,  B01J49/00 ,  C22B3/42 ,  C22B3/44 ,  C22C28/00

Abstract: In alternative embodiments, the invention provides processes and methods for the recovery, removal or extracting of, and subsequent purification of uranium from a wet-process phosphoric acid using a continuous ion exchange processing approach, where the uranium is recovered from a phosphoric acid, or a phos-acid feedstock using either a dual or a single stage extraction methodology. In both cases an intermediate ammonium uranyl-tricarbonate solution is formed. In alternative embodiments, in the dual cycle approach, this solution is contacted in a second continuous ion exchange system with a strong anion exchange resin then subsequently recovered as an acidic uranyl solution that is further treated to produce an intermediate uranyl peroxide compound which is ultimately calcined to produce the final uranium oxide product. In alternative embodiments, in the single cycle case, the intermediate ammonium uranyl-tricarbonate solution is evaporated to decompose the ammonium carbonate and produce an intermediate uranium carbonate/oxide solid material. These solids are digested in an acid medium, and then processed in the same manner as the secondary regeneration solution from the dual cycle process to produce an intermediate uranyl peroxide that is calcined to produce a final uranium oxide product.

公开(公告)号：US20210163309A1

公开(公告)日：2021-06-03

申请号：US17053299

申请日：2019-05-03

Applicant: RIO TINTO IRON AND TITANIUM CANADA INC.

Inventor： Michel Paquin ,  Dimitrios Filippou

IPC: C01F17/13 ,  B01J45/00 ,  B01J49/53

Abstract: The present disclosure provides a process for polishing at least one metal contaminant from a stock solution comprising Sc comprising the steps of a) contacting the stock solution with an ion exchange resin capturing Sc and the at least one metal contaminate so as to produce a metal ion exchange resin complex, and b) scrubbing the metal resin complex with a scrubbing solution comprising a carboxylate ion, so as to produce a Sc ion exchange resin complex and a spent carboxylate solution, which can be treated by electrodialysis to regenerate the carboxylate ion required for scrubbing.

公开(公告)号：US10364303B2

公开(公告)日：2019-07-30

申请号：US15763648

申请日：2017-01-10

Applicant: HYMO Corporation

Inventor： Aiko Suzuki ,  Go Honda

IPC: C08F8/00 ,  B01J45/00

Abstract: An iminodiacetic acid type chelate resin which can be easily and efficiently produced and which can efficiently adsorb and separate metal ions; and a method for producing the same are developed. The use of a chelate rein having a carboxymethyl group introduced into primary amino groups of the polyvinylamine crosslinked polymer particles can facilitate the efficient adsorption and separation of metal ions in water. The chelate resin can be obtained by a production method in which an N-vinyl carboxylic acid amide is suspension polymerized with a crosslinkable monomer in salt water in the presence of a dispersant thereby to obtain a polyvinyl carboxylic acid amide crosslinked polymer particles, and the obtained polyvinyl carboxylic acid amide crosslinked polymer is hydrolyzed to thereby introduce a carboxymethyl group into primary amino groups of the polyvinylamine crosslinked polymer particles.