Patents Assigned to Rhone-Poulenc Specialites Chimiques "Les Miroirs"
  • Process for improving the rheological properties of a suspension of precipitated silica
    Patent number: 4537699
    Abstract: The present invention provides a process for improving the rheological properties of a suspension of precipitated silica by the addition of an aluminum compound, thereby producing a sprayable suspension or slurry with a pH of greater than 3.5, a solids content of at least about 15% by weight, which may be spray dried to form silica in either powder or microbead form. In a preferred embodiment, the aluminum compound added to the suspension is in the form of sodium aluminate.
    Type: Grant
    Filed: November 23, 1983
    Date of Patent: August 27, 1985
    Assignee: Rhone-Poulenc Specialites Chimiques "Les Miroirs"
    Inventor: Jean-Noel Jas