Patents by Inventor Andrew John Donaldson

Andrew John Donaldson 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).

  • Production of high purity lithium compounds directly from lithium containing brines
    Patent number: 9988280
    Abstract: A process for reducing the amount of magnesium in a lithium-containing brine by adding an aqueous solution of KCl to the brine to precipitate at least some of the magnesium as carnallite salt is disclosed. Lithium salts prepared using this magnesium removal process are also disclosed.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: June 5, 2018
    Assignee: ROCKWOOD LITHIUM INC.
    Inventors: Andrew John Donaldson, Daniel Alfred Boryta
  • Production Of High Purity Lithium Compounds Directly Form Lithium Containing Brines
    Publication number: 20160167976
    Abstract: A process for reducing the amount of magnesium in a lithium-containing brine by adding an aqueous solution of KCl to the brine to precipitate at least some of the magnesium as carnallite salt is disclosed. Lithium salts prepared using this magnesium removal process are also disclosed.
    Type: Application
    Filed: February 22, 2016
    Publication date: June 16, 2016
    Inventors: Andrew John Donaldson, Daniel Alfred Boryta
  • Production of high purity lithium compounds directly from lithium containing brines
    Patent number: 9005557
    Abstract: A process for reducing the amount of magnesium in a lithium-containing brine by adding an aqueous solution of KCl to the brine to precipitate at least some of the magnesium as carnallite salt is disclosed. Lithium salts prepared using this magnesium removal process are also disclosed.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: April 14, 2015
    Assignee: Rockwood Lithium Inc.
    Inventors: Andrew John Donaldson, Daniel Alfred Boryta
  • PRODUCTION OF HIGH PURITY LITHIUM COMPOUNDS DIRECTLY FORM LITHIUM CONTAINING BRINES
    Publication number: 20140044622
    Abstract: A process for reducing the amount of magnesium in a lithium-containing brine by adding an aqueous solution of KCl to the brine to precipitate at least some of the magnesium as carnallite salt is disclosed. Lithium salts prepared using this magnesium removal process are also disclosed.
    Type: Application
    Filed: October 16, 2013
    Publication date: February 13, 2014
    Applicant: Rockwood Lithium Inc.
    Inventors: Andrew John Donaldson, Daniel Alfred Boryta
  • PRODUCTION OF HIGH PURITY LITHIUM COMPOUNDS DIRECTLY FROM LITHIUM CONTAINING BRINES
    Publication number: 20120189516
    Abstract: A process for reducing the amount of magnesium in a lithium-containing brine by adding an aqueous solution of KCl to the brine to precipitate at least some of the magnesium as carnallite salt is disclosed. Lithium salts prepared using this magnesium removal process are also disclosed.
    Type: Application
    Filed: October 28, 2011
    Publication date: July 26, 2012
    Inventors: Andrew John Donaldson, Daniel Alfred Boryta