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    D-PSICOSE CRYSTAL AND PREPARATION METHOD THEREOF
    1.
    发明公开
    D-PSICOSE CRYSTAL AND PREPARATION METHOD THEREOF 审中-公开

    公开(公告)号：US20230279037A1

    公开(公告)日：2023-09-07

    申请号：US18154828

    申请日：2023-01-15

    Applicant: Sanying WANG ,  Linzheng LI ,  Ziheng JIN ,  Yanjun WEN

    Inventor： Sanying WANG ,  Linzheng LI ,  Ziheng JIN ,  Yanjun WEN

    IPC: C07H1/06 ,  C07H3/02

    CPC classification number: C07H1/06 ,  C07H3/02

    Abstract: The invention provides a D-psicose crystal and a preparation method thereof. The method comprises: adding a seed crystal to a D-psicose solution and stirring uniformly, subjecting the solution to crystallization by gradient cooling and constant-temperature crystallization alternately at 50-30° C., stopping the crystallization until the temperature of the solution is 30° C., separating the crystal by centrifugation, washing and drying, to obtain a D-psicose crystal. Rather than evaporative crystallization, organic solvent-assisted crystallization and ultrasonication, controllable crystallization by gradient cooling, constant-temperature crystallization, and other technical means are employed. Thus, the invention has low requirements for equipment, simple process, low energy consumption, and low preparation cost, and thus particularly suitable for large-scale industrial production and processing. The purity of the D-psicose crystal obtained is ≥98.5%, 80% by weight or more of the crystal has a grain size in the range of 20-40 meshes, and the yield per crystallization is ≥70%.

    PUERARIA FLOWER EXTRACT RICH IN ISOFLAVONES AND A METHOD AND APPLICATION OF THE SAME
    3.
    发明申请
    PUERARIA FLOWER EXTRACT RICH IN ISOFLAVONES AND A METHOD AND APPLICATION OF THE SAME 有权

    公开(公告)号：US20210393725A1

    公开(公告)日：2021-12-23

    申请号：US17327708

    申请日：2021-05-22

    Applicant: Sujing GU ,  Linzheng LI ,  Ziheng JIN ,  Yanjun WEN

    Inventor： Sujing GU ,  Linzheng LI ,  Ziheng JIN ,  Yanjun WEN

    IPC: A61K36/488

    Abstract: A method of preparing a Pueraria flower extract rich in isoflavones includes: grinding dry Pueraria flowers to obtain a Pueraria flower powder; adding a first 20-50% ethanol solution to form a mixture, stirring and heating the mixture at 20-80° C. for 1-4 hours, removing the first solution, adding a second 20-50% ethanol solution, stirring and heating the mixture, removing the second solution, and combining the first solution and the second solution to obtain an extract solution; filtering the extract solution to remove solids; concentrating the extract solution under vacuum to obtain a crude extract containing 10-40% solid components; adding anhydrous ethanol solution to reach an ethanol concentration of the crude extract of 75-95%, storing the crude extract at 20-30° C. for 1-4 hours; centrifuging the crude extract at a speed of 2,000-5,000 r/min to obtain a supernatant; and concentrating and spray drying to obtain the Pueraria flower extract without any purification steps.

    9.
    发明授权
    有权

    公开(公告)号：US11654378B2

    公开(公告)日：2023-05-23

    申请号：US17352295

    申请日：2021-06-19

    Applicant: Sujing Gu ,  Ziheng Jin ,  Yanjun Wen ,  Linzheng Li

    Inventor： Sujing Gu ,  Ziheng Jin ,  Yanjun Wen ,  Linzheng Li

    IPC: B01D11/02 ,  C07C50/18 ,  C08B37/08 ,  B01D11/04 ,  B01D61/14 ,  C08B37/00

    CPC classification number: B01D11/0288 ,  B01D11/0284 ,  B01D11/0415 ,  B01D11/0492 ,  B01D61/145 ,  C07C50/18 ,  C08B37/0087

    Abstract: A method of preparing a Senna obtusifolia seed extract rich in anthraquinones and a galactomannan extract includes the following steps: (1) crushing Senna obtusifolia seeds into a Senna obtusifolia seed powder; (2) extracting the Senna obtusifolia seed powder with 40-85% ethanol, filtering to obtain an extract solution and a residue; (3) concentrating the extract solution under vacuum to obtain a concentrated extract solution, spray-drying the concentrated extract solution to obtain the Senna obtusifolia seed extract; (4) extracting the residue with membrane filtered water, conducting a centrifugation to obtain a supernatant; (5) adding ammonium sulfate and ethanol to the supernatant to form a two-phase aqueous system, collecting a bottom layer of the two-phase aqueous system; and (6) conducting an ultrafiltration of the bottom layer with a cut-off molecular weight of 50 k-200 k to obtain a galactomannan extract solution, drying the galactomannan extract solution under vacuum to obtain the galactomannan extract.

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