Patents Assigned to Lhoist Researche et Developpement S.A.
  • Calcium and/or magnesium hydroxide, and preparation and use thereof
    Patent number: 5705141
    Abstract: The invention relates to a method for the preparation of a special calcium and/or magnesium hydroxide in which CaO and/or MgO is reacted with water in the presence of an additive selected among ethylene glycol, diethylene glycol, triethylene glycol, monoethanolamine, diethanolamine, triethanolamine and mixtures thereof, the weight ratio additive to CaO and/or MgO being greater than 0.002:1.
    Type: Grant
    Filed: January 18, 1996
    Date of Patent: January 6, 1998
    Assignee: Lhoist Researche et Developpement S.A.
    Inventors: Philippe A. Dumont, Robert Goffin