Patents Assigned to Center National de la Recherche Scientific (C.N.R.S.)
  • Patent number: 9675980
    Abstract: A flotation process for recovering feldspar from a feldspar containing feed material is disclosed. The process includes forming an aqueous suspension of a feldspar containing feed material, in the absence of hydrofluoric acid, wherein the suspension includes from 0.004 to 0.3% wt. of a flotation reagent including: (a) one or more amines, containing at least one aliphatic hydrocarbon chain, linear or branched, saturated or unsaturated, including 8 to 50 carbon atoms, or a salt thereof; and (b) one or more primary, secondary or tertiary alcohols, containing at least one aliphatic hydrocarbon chain, linear or branched, saturated or unsaturated, including 8 to 50 carbon atoms; the ratio of (a) to (b) ranging from 500:1 to 1:40 by weight. The process further includes agitating the obtained suspension to produce a feldspar containing fraction, and separating the feldspar containing fraction.
    Type: Grant
    Filed: January 6, 2011
    Date of Patent: June 13, 2017
    Assignees: Imerys Ceramics France, Universite de Lorraine, Center National de la Recherche Scientific (C.N.R.S.)
    Inventor: Lev O. Filippov