Patents Assigned to FERIN SP. Z O.O
  • Patent number: 10919774
    Abstract: A method for the management of phosphogypsum consists in that a reactor (2) is charged with apatite and/or phosphorite phosphogypsum and with an aqueous or ammoniacal solution of ammonium carbonate and/or bicarbonate from a pre-reactor (1), at 1: (0.1-4) ratio of phosphogypsum to the aqueous or ammoniacal solution of ammonium carbonate and/or bicarbonate, the entire contents are stirred at ?10° C. to 200° C.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: February 16, 2021
    Assignee: FERIN SP. Z O.O.
    Inventors: Agata Toczek, Wlodzimierz Merka, Patryk Gosciniak, Maciej Gosciniak
  • Patent number: 10370258
    Abstract: A method for complex treatment of phosphogypsum comprising crushing of phosphogypsum and its washing with a solution of sulphuric acid, concentration 2-15%, and stirring at 50-80? C.
    Type: Grant
    Filed: April 25, 2016
    Date of Patent: August 6, 2019
    Assignee: FERIN SP. Z O.O
    Inventor: Wlodzimierz Merka