Abstract:
A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains: (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked to the phenyl ring; (ii) about 2 to about 5 millimoles per gram (mmol/g) of phosphorous as phosphonic acid ligands; and (iii) a sufficient amount of a sulfonic acid ligand such that the ratio of mmol/g of phosphonic acid to mmol/g sulfonic acid is up to 3:1. A process for removing polyvalent metal cations from aqueous solution, and a process for removing iron (III) cations from acidic copper (II) cation-containing solutions that utilize the contemplated resin or other resins are disclosed.
Abstract:
A process for producing substantially impurity-free Bi-213 cations is disclosed. An aqueous acid feed solution containing Ac-225 cations is contacted with an ion exchange medium to bind the Ac-225 cations and form an Ac-225-laden ion exchange medium. The bound Ac-225 incubates on the ion exchange medium to form Bi-213 cations by radioactive decay. The Bi-213 cations are then recovered from the Ac-225-laden ion exchange medium to form a substantially impurity-free aqueous Bi-213 cation acid solution. An apparatus for carrying out this process is also disclosed.
Abstract:
An extraction chromatographic material for extracting metal cations from a liquid stream. The extraction chromatographic material is prepared by adsorbing a diesterified methanediphosphonic acid on an inert particulate support.
Abstract:
An ion exchange resin for extracting metal ions from a liquid waste stream. An ion excahnge resin is prepared by copolymerizing a vinylidene disphosphonic acid with styrene, acrylonitrile a nd divinylbenzene.
Abstract:
A process for producing substantially impurity-free Bi-213 cations is disclosed. An aqueous acid feed solution containing Ac-225 cations is contacted with an ion exchange medium to bind the Ac-225 cations and form an Ac-225-laden ion exchange medium. The bound Ac-225 incubates on the ion exchange medium to form Bi-213 cations by radioactive decay. The Bi-213 cations are then recovered from the Ac-225-laden ion exchange medium to form a substantially impurity-free aqueous Bi-213 cation acid solution. An apparatu s for carrying out this process is also disclosed.
Abstract:
A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked to the phenyl ring, (ii) about 2 to about 5 millimoles per gram (mmol/g) of phosphorus as phosphonic acid ligands, and (iii) a sufficient amount of a sulfonic acid ligand such that the ratio of mmol/g of phosphonic acid to mmol/g sulfonic acid is up to 3:1. A process for removing polyvalent metal cations from aqueous solution, and a process for removing iron(III) cations from acidic copper(II) cation-containing solutions that utilize the contemplated resin or other resins are disclosed.
Abstract:
A process for preconcentrating and separating radium from a contaminated solution containing at least water and radium includes the steps of adding a quantity of a water-soluble macrocyclic polyether to the contaminated solution to form a combined solution. An acid is added to the combined solution to form an acidic combined solution having an [H+] concentration of about 0.5M. The acidic combined solution is contacted with a sulfonic acid-based strong acid cation exchange medium or a organophilic sulfonic acid medium having a plurality of binding sites thereon to bind the radium thereto and to form a radium-depleted solution. The radium-depleted solution is separated from the strong acid cation exchange medium or organophilic sulfonic acid medium. The radium remaining bound to the exchange medium or organophilic reagent is then stripped from the exchange medium or organophilic medium and the activity of the radium is measured.
Abstract:
EN DONDE DICHA RESINA COMPRENDE : i) MONOMEROS POLIMERIZADOS QUE CONTIENEN UN ANILLO DE FENILO Y QUE TIENEN UN LIGANDO DE ACIDO FOSFONICO ENLAZADO AL ANILLO DE FENILO; ii) ENTRE 2 mmol/g Y 5 mmol/g DE FOSFORO COMO LIGANDOS DE ACIDO FOSFONICO; Y iii) UNA CANTIDAD SUFICIENTE DE UN LIGANDO DE ACIDO SULFONICO DE MANERA QUE LA RELACION DE mmol/g DE ACIDO FOSFONICO A mmol/g DE ACIDO SULFONICO ES HASTA 3:1. ADEMAS SE REFIERE A UN PROCESO PARA RETIRAR CATIONES DE METALES POLIVALENTES A PARTIR DE UNA SOLUCION ACUOSA, Y UN PROCESO PARA RETIRAR CATIONES DE HIERRO (III) A PARTIR DE SOLUCIONES ACIDAS QUE CONTIENEN CATIONES DE COBRE (II) UTILIZANDO LA RESINA O RESINAS CONTEMPLADAS EN EL MISMO
Abstract:
An extraction chromatographic material for extracting metal cations from a liquid stream. The extraction chromatographic material is prepared by adsorbing a diesterified methanediphosphonic acid on an inert particulate support.
Abstract:
A mixture of a di- or polyphosphonic acid and a reductant wherein each is present in a sufficient amount to provide a synergistic effect with respect to the dissolution of metal ozides and optionally containing corrosion inhibitors and pH adjusting agents.