Patents by Inventor Mahmood Alemrajabi

Mahmood Alemrajabi 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).

  • PROCESS FOR CATHODE ACTIVE MATERIAL PRECURSOR PREPARATION
    Publication number: 20240102127
    Abstract: The present invention relates to a process for producing a cathode active material precursor having a desired active material target ratio for use in a lithium-ion secondary cell or in the production of a lithium-ion secondary cell.
    Type: Application
    Filed: February 7, 2022
    Publication date: March 28, 2024
    Inventors: Mahmood ALEMRAJABI, Ragnar SJÖDAHL, Emma NEHRENHEIM, Robert JENSEN
  • PROCESS FOR THE RECOVERY OF CATHODE MATERIALS IN THE RECYCLING OF BATTERIES
    Publication number: 20230042034
    Abstract: A process for removal of aluminium and iron in the recycling of rechargeable batteries comprising providing a leachate from black mass, adding phosphoric acid (H3PO4) to said leachate and adjusting the pH to form iron phosphate (FePO4) and aluminium phosphate (AlPO4), precipitating and removing the formed FePO4 and AlPO4, and forming a filtrate for further recovery of cathode metals, mainly NMC-metals and lithium.
    Type: Application
    Filed: October 17, 2022
    Publication date: February 9, 2023
    Inventors: Mahmood ALEMRAJABI, Ingrid KARLSSON, Ragnar SJÖDAHL, Emma NEHRENHEIM, Martina PETRANIKOVA, Cristian TUNSU
  • Process for the recovery of cathode materials in the recycling of batteries by removing aluminum and iron
    Patent number: 11509000
    Abstract: A process for removal of aluminium and iron in the recycling of rechargeable batteries comprising providing a leachate from black mass, adding phosphoric acid (H3PO4) to said leachate and adjusting the pH to form iron phosphate (FePO4) and aluminium phosphate (AlPO4), precipitating and removing the formed FePO4 and AlPO4, and forming a filtrate for further recovery of cathode metals, mainly NMC-metals and lithium.
    Type: Grant
    Filed: April 14, 2020
    Date of Patent: November 22, 2022
    Assignee: NORTHVOLT AB
    Inventors: Mahmood Alemrajabi, Ingrid Karlsson, Ragnar Sjödahl, Emma Nehrenheim, Martina Petranikova, Cristian Tunsu
  • PROCESS FOR THE RECOVERY OF CATHODE MATERIALS IN THE RECYCLING OF BATTERIES
    Publication number: 20220149452
    Abstract: A process for removal of aluminium and iron in the recycling of rechargeable batteries comprising providing a leachate from black mass, adding phosphoric acid (H3PO4) to said leachate and adjusting the pH to form iron phosphate (FePO4) and aluminium phosphate (AlPO4), precipitating and removing the formed FePO4 and AlPO4, and forming a filtrate for further recovery of cathode metals, mainly NMC-metals and lithium.
    Type: Application
    Filed: April 14, 2020
    Publication date: May 12, 2022
    Inventors: Mahmood ALEMRAJABI, Ingrid KARLSSON, Ragnar SJÖDAHL, Emma NEHRENHEIM, Martina PETRANIKOVA, Cristian TUNSU
  • PROCESS AND METHOD FOR PRODUCING CRYSTALLIZED METAL SULFATES
    Publication number: 20220009793
    Abstract: A process for generating a metal sulfate that involves crystallizing a metal sulfate from an aqueous solution to form a crystallized metal sulfate in a mother liquor with uncrystallized metal sulfate remaining in the mother liquor; separating the crystallized metal sulfate from the mother liquor; basifying a portion of the mother liquor to convert the uncrystallized metal sulfate to a basic metal salt; and using the basic metal salt upstream of crystallizing the metal sulfate. So crystallized, the generated metal sulfate may be battery-grade or electroplating-grade.
    Type: Application
    Filed: April 5, 2021
    Publication date: January 13, 2022
    Inventors: Robert John FRASER, Evangelos STAMATIOU, Mark Joseph MACHADO, Henry Christian Immo von SCHROETER, Mahmood ALEMRAJABI
  • Process for producing crystallized metal sulfates
    Patent number: 10995014
    Abstract: A process for generating a metal sulfate that involves crystallizing a metal sulfate from an aqueous solution to form a crystallized metal sulfate in a mother liquor with uncrystallized metal sulfate remaining in the mother liquor; separating the crystallized metal sulfate from the mother liquor; basifying a portion of the mother liquor to convert the uncrystallized metal sulfate to a basic metal salt; and using the basic metal salt upstream of crystallizing the metal sulfate. So crystallized, the generated metal sulfate may be battery-grade or electroplating-grade.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: May 4, 2021
    Assignees: Northvolt AB, Hatch Ltd.
    Inventors: Robert John Fraser, Evangelos Stamatiou, Mark Joseph Machado, Henry Christian Immo von Schroeter, Mahmood Alemrajabi