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    Isotope purification method
    62.
    发明授权
    Isotope purification method 有权

    公开(公告)号：US10729794B2

    公开(公告)日：2020-08-04

    申请号：US16067675

    申请日：2016-12-29

    Applicant: BAYER AS

    Inventor： Janne Olsen Frenvik ,  Olav B. Ryan

    IPC: A61K51/10 ,  B01D15/36 ,  B01J39/05 ,  B01J39/17 ,  A61N5/10 ,  B01J39/26 ,  C07K16/32

    Abstract: The invention provides a method for the purification of 227 Th from a mixture comprising 227 Th and 223 Ra, said method comprising: i) preparing a first solution comprising a mixture of 227 Th and 223 Ra ions dissolved in a first aqueous buffer; ii) loading said first solution onto a separation material such as a strong cation exchange resin; iii) eluting 227 Th from the separation material, whereby to generate a second solution comprising 227 Th; iv) Optionally rinsing said separation material using a first aqueous washing medium; The invention additionally provides a method for forming a radio pharmaceutical comprising complexing the purified 227 Th, the pharmaceutical product and its use in treatment of disease such as cancer and a kit for generation of such a product.

    Conversion of wood based hemicellulose prehydrolysate succinic acid using a heterogeneous acid catalayst in a biphasic system
    64.
    发明授权
    Conversion of wood based hemicellulose prehydrolysate succinic acid using a heterogeneous acid catalayst in a biphasic system 有权

    公开(公告)号：US10710954B2

    公开(公告)日：2020-07-14

    申请号：US16225185

    申请日：2018-12-19

    Applicant: Lakehead University

    Inventor： Sudip Kumar Rakshit ,  Sai Swaroop Dalli

    IPC: C07C51/31 ,  B01J39/05 ,  B01J39/20

    Abstract: A novel approach for the conversion of biomass based hemicellulose prehydrolysate to high value succinic acid has been investigated using a heterogeneous acid catalyst, Amberlyst 15 and hydrogen peroxide. A vital intermediate in this process, furfural, was oxidized in a biphasic system to produce succinic acid. Production of furfural in good yields is a limiting step in such processes for a number of reasons. Among the organic solvents evaluated, toluene was found to be an ideal solvent for furfural extraction and facilitated the conversion of furfural to succinic acid. Simultaneous extraction of furfural into the organic solvent as it is produced, increased the overall yield. It was observed that the developed method resulted in a succinic acid yield of 49% from the furfural obtained from hemicellulose prehydrolysate. It was found that 50 mg of Amberlyst 15 per mmole of furfural resulted in 100% FA conversion in less time.

    METAL ION EXTRACTION FROM BRINES
    67.
    发明申请
    METAL ION EXTRACTION FROM BRINES 审中-公开

    公开(公告)号：US20190176142A1

    公开(公告)日：2019-06-13

    申请号：US16278287

    申请日：2019-02-18

    Applicant: SRI International

    Inventor： Marc Hornbostel ,  Susanna Ventura ,  Srinivas Bhamidi

    IPC: B01J39/20 ,  B01J39/05 ,  B01J47/02 ,  B01J49/53 ,  B01J49/06 ,  C01D15/08

    Abstract: A material includes a porous particle that includes a metal ion imprinted polymer. The metal ion imprinted polymer is formed from a hydrophilic co-monomer, a metal containing polymerizable compound, and a cross-linking agent. The metal containing polymerizable compound includes at least one metal chelating ligand. The metal ion imprinted polymer includes a plurality of metal ion selective binding sites. A method includes flowing brine containing a metal ion through a reactor that includes the material. The method further includes discharging the brine from the reactor, contacting the porous particles with water, and pressurizing the reactor with carbon dioxide. The carbon dioxide reacts with the adsorbed metal ions to form a metal carbonate solution. The method further includes depressurizing the reactor to precipitate metal carbonate from the metal carbonate solution and discharging the metal carbonate solution from the reactor.

    PROCESSES FOR THE RECOVERY OF URANIUM FROM WET-PROCESS PHOSPHORIC ACID USING DUAL OR SINGLE CYCLE CONTINUOUS ION EXCHANGE APPROACHES
    69.
    发明申请
    PROCESSES FOR THE RECOVERY OF URANIUM FROM WET-PROCESS PHOSPHORIC ACID USING DUAL OR SINGLE CYCLE CONTINUOUS ION EXCHANGE APPROACHES 审中-公开

    公开(公告)号：US20190078176A1

    公开(公告)日：2019-03-14

    申请号：US16101807

    申请日：2018-08-13

    Applicant: K-Technologies, Inc. ,  OCP S.A.

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

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

    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.

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