Patents by Inventor Anca-Mihaela Nacu

Anca-Mihaela Nacu 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).

  • Processing of cobaltous sulphate/dithionate liquors derived from cobalt resource
    Patent number: 10308523
    Abstract: A process for water removal and/or recycling of sodium sulphate and/or sodium dithionate containing liquors derived from processing a cobalt resource derived from components of lithium ion batteries comprising steps of deriving from the cobalt resource a solution containing cobalt sulphate and cobalt dithionate, precipitation of cobalt as cobaltous carbonate or cobaltous hydroxide followed by removal thereof from the liquor, crystallization of sodium sulphate and sodium dithionate and removal of the resulting crystals, followed by heating of the crystals to anhydrous sodium sulphate, sulphur dioxide and water and then separating the anhydrous sodium sulphate.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: June 4, 2019
    Assignee: Rocher Manganese, Inc.
    Inventors: Norman Chow, Joey Chung-Yen Jung, Anca-Mihaela Nacu, Douglas Dale Warkentin
  • Processing of cobaltous sulpha/dithionate liquors derived from cobalt resource
    Patent number: 10246343
    Abstract: A process for water removal and/or recycling of sodium sulfate and/or sodium dithionate containing liquors derived from processing cobalt resource material essentially free of lithium comprising the steps of precipitation of cobalt as cobaltous carbonate or cobaltous hydroxide followed by removal thereof from the liquor, crystallization of sodium sulfate and sodium dithionate and removal of the crystals, followed by heating of the crystals to anhydrous sodium sulfate, sulphur dioxide and water and then separating the anhydrous sodium sulfate.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: April 2, 2019
    Assignee: Rocher Manganese, Inc.
    Inventors: Norman Chow, Joey Chung-Yen Jung, Anca Mihaela Nacu, Douglas Dale Warkentin
  • PROCESSING OF COBALTOUS SULPHA/DITHIONATE LIQUORS DERIVED FROM COBALT RESOURCE
    Publication number: 20180155208
    Abstract: A process for water removal and/or recycling of sodium sulfate and/or sodium dithionate containing liquors derived from processing cobalt resource material essentially free of lithium comprising the steps of precipitation of cobalt as cobaltous carbonate or cobaltous hydroxide followed by removal thereof from the liquor, crystallization of sodium sulfate and sodium dithionate and removal of the crystals, followed by heating of the crystals to anhydrous sodium sulfate, sulphur dioxide and water and then separating the anhydrous sodium sulfate.
    Type: Application
    Filed: November 7, 2017
    Publication date: June 7, 2018
    Applicant: ROCHER MANGANESE, INC.
    Inventors: Norman Chow, Joey Chung-Yen Jung, Anca Mihaela Nacu, Douglas Dale Warkentin
  • Processing of manganous sulphate/dithionate liquors derived from manganese resource material
    Patent number: 8460631
    Abstract: The process concerns hydrometallurgical processing of manganese sulphate and manganese dithionate containing liquors and recovery of water therefrom. Sodium sulphate and/or sodium dithionate containing liquors are derived from manganese sulphate and manganese dithionate containing liquids, which are then cooled to produce crystals of sodium sulphate decahydrate and sodium dithionate dehydrate. The sodium sulphate decahydrate and sodium dithionate dehydrate crystals are then heated to a temperature sufficient to decompose the sodium sulphate decahydrate crystals to form anhydrous sodium sulphate crystals, sodium dithionate hydrate crystals and water, after which water is removed from the sodium sulphate and sodium dithionate hydrate crystal. The sodium sulphate and sodium dithionate dehydrate crystals are then heated to form anhydrous sodium sulphate, sulfur dioxide and water or steam. The anhydrous sodium sulphate is then separated from the sulfur dioxide and water.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: June 11, 2013
    Assignee: American Manganese Inc.
    Inventors: Norman Chow, Anca-Mihaela Nacu, Douglas Warkentin, John Wentworth Fisher
  • PROCESSING OF MANGANOUS SULPHATE/DITHIONATE LIQUORS DERIVED FROM MANGANESE RESOURCE MATERIAL
    Publication number: 20120207666
    Abstract: The process concerns hydrometallurgical processing of manganese sulphate and manganese dithionate containing liquors and recovery of water therefrom. Sodium sulphate and/or sodium dithionate containing liquors are derived from manganese sulphate and manganese dithionate containing liquids, which are then cooled to produce crystals of sodium sulphate decahydrate and sodium dithionate dehydrate. The sodium sulphate decahydrate and sodium dithionate dehydrate crystals are then heated to a temperature sufficient to decompose the sodium sulphate decahydrate crystals to form anhydrous sodium sulphate crystals, sodium dithionate hydrate crystals and water, after which water is removed from the sodium sulphate and sodium dithionate hydrate crystal. The sodium sulphate and sodium dithionate dehydrate crystals are then heated to form anhydrous sodium sulphate, sulfur dioxide and water or steam. The anhydrous sodium sulphate is then separated from the sulfur dioxide and water.
    Type: Application
    Filed: August 16, 2011
    Publication date: August 16, 2012
    Applicant: American Manganese, Inc.
    Inventors: Norman Chow, Anca-Mihaela Nacu, Douglas Warkentin, John Wentworth Fisher