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    PROCESS FOR RECOVERING LITHIUM PHOSPHATE AND LITHIUM SULFATE FROM LITHIUM-BEARING SILICATES
    4.
    发明申请
    PROCESS FOR RECOVERING LITHIUM PHOSPHATE AND LITHIUM SULFATE FROM LITHIUM-BEARING SILICATES 有权

    公开(公告)号：US20210222270A1

    公开(公告)日：2021-07-22

    申请号：US17059041

    申请日：2019-05-30

    申请人： LITHIUM AUSTRALIA NL ,  AUSTRALIAN NUCLEAR SCIENCE AND TECHNOLOGY ORGANISATION

    发明人： Andrew NAPIER ,  Christopher GRIFFITH

    IPC分类号： C22B26/12 ,  C01B25/30 ,  C01D15/06 ,  C01D5/02

    摘要： A process for recovering lithium phosphate and lithium sulfate from a lithium-bearing silicate is described. The process includes adding from 800 kg/t to 1600 kg/t of sulfuric acid to a slurry of the lithium-bearing silicate and from 40 kg/t to 600 kg/t of a source of fluoride to produce a leach mixture and heating said leach mixture. A lithium-bearing solution is then separated from the leach mixture and its pH is increased sequentially to pH 3.5 to 4, pH 5.5 to 6 then pH 10.5 to 11 to precipitate, respectively, a first, second and third set of impurities therefrom. The first, second and third sets of impurities are separated from the lithium-bearing solution and lime is added to maintain a soluble Ca concentration of at least 30 mg/L. The lithium-bearing solution is then softened by adding a two sequential amounts of phosphate to precipitate fluorapatite and apatite, respectively. A third amount of phosphate is added to produce a lithium phosphate precipitate which is then separated. The separated lithium phosphate precipitate is then digested in sulphuric acid to produce a digestion mixture from which a lithium sulfate precipitate is separated. An alkali metal hydroxide is added to the separated solution to produce an alkali metal phosphate solution and this is recycled for use as phosphate in the process.

    COMPRESSIVE IMAGING METHOD AND SYSTEM
    9.
    发明申请
    COMPRESSIVE IMAGING METHOD AND SYSTEM 有权

    公开(公告)号：US20210199819A1

    公开(公告)日：2021-07-01

    申请号：US16756355

    申请日：2018-10-22

    申请人： Australian Nuclear Science and Technology Organisation

    发明人： David Boardman ,  Mathew Guenette ,  Alison Flynn ,  Adam Sarbutt ,  Lachlan Chartier ,  Jayden IIter ,  Dale Prokopovich ,  Geoff Watt

    IPC分类号： G01T1/29 ,  G01T1/36

    摘要： A mask for use in compressed sensing of incoming radiation, the mask comprising: a body formed of a material that modulates an intensity of incoming radiation of interest. The body has a plurality of mask aperture regions, each comprising at least one mask aperture that allows a higher transmission of the radiation relative to other portions of the respective mask aperture region, the relative transmission being sufficient to allow reconstruction of the compressed sensing measurements; the mask has one or more axes of rotational symmetry with respect to the mask aperture regions; the mask apertures have a shape that provides symmetry after a rotation about the one or more axes of rotational symmetry; and mutual coherence of a sensing matrix generated by the rotation of the respective mask aperture regions is less than one. An imaging system for compressed sensing of incoming radiation comprising such a mask is also provided.