Patents Assigned to Mineral Recovery Limited
  • Method, apparatus and use of chelating agents for the purification of calcium sulphate
    Publication number: 20020192145
    Abstract: A chemical process for the purification of CaSO4 utilizes the ability of an aqueous solution of a chelating agent to selectively dissolve CaSO4, in that the initial extraction can be carried out at certain pH and CaSO4 can be recovered by titration to a different pH (usually a lower pH) following a mechanical treatment, such as centrifugation or filtration, to separate the aqueous chelate solution from insoluble material. Also claimed are an apparatus and the use of chelating agents therefor.
    Type: Application
    Filed: October 29, 2001
    Publication date: December 19, 2002
    Applicant: Mineral Recovery Limited
    Inventor: Christopher Oldfield