Patents by Inventor Hazel Lim

Hazel Lim has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240391790
    Abstract: A process for extracting values from a leach residue from lithium extraction comprising: (a) mixing the leach residue with a chloride containing compound to form a first mixture; (b) calcining the first mixture to form a calcined mixture rich in calcium aluminosilicate and a hydrochloric acid containing off gas; (c) acid leaching the calcined mixture to form an aluminium bearing liquor and a silicon rich solid residue; (d) recovering values selected from the group consisting of aluminium compounds, silicon compounds and compounds containing silicon and aluminium.
    Type: Application
    Filed: September 21, 2022
    Publication date: November 28, 2024
    Applicant: Tianqi Lithium Kwinana Pty Ltd
    Inventors: Yafeng Guo, Hazel Lim
  • Publication number: 20230040892
    Abstract: A process for producing alumina and a lithium salt comprising the steps of: (a) calcining an alpha spodumene ore or concentrate to produce beta spodumene; and (b) (I) leaching beta spodumene from the calcining step (a) with an alkaline solution under pressure; or (II) sulphating beta spodumene with at least sodium sulphate and leaching said sulphated beta spodumene to produce a lithium containing solution and a zeolitic residue. The lithium containing solution is treated to provide a purified lithium salt and said zeolitic residue is treated to provide high purity alumina.
    Type: Application
    Filed: January 19, 2021
    Publication date: February 9, 2023
    Applicant: Tianqi Lithium Kwinana Pty Ltd
    Inventors: Yafeng Guo, Hazel Lim
  • Publication number: 20210032724
    Abstract: A process for extracting values from lithium slag comprising: (a) hydrothermally treating lithium slag with an aqueous solution of an alkaline compound at selected temperature and duration; (b) performing an ion exchange step on the alkaline treated lithium slag; and (c) recovering values selected from the group consisting of aluminium compounds, silicon compounds and compounds containing silicon and aluminium.
    Type: Application
    Filed: December 11, 2018
    Publication date: February 4, 2021
    Inventors: Suzanne Elizabeth Maree, Mirela Ghisi, Hazel Lim, Yafeng Guo