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Process for rapid production of colloidal particles

  • US 5,704,556 A
  • Filed: 09/16/1996
  • Issued: 01/06/1998
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. A process for rapidly producing colloidal particles, the process comprising(a) providing a feedstock slurry having an average particle size less than one micron to a stirred media mill, the slurry including from about 5 to 10 percent by weight dispersant;

  • and a total solids of less than about 50 percent by weight in a low viscosity fluid;

    (b) providing ceramic beads less than 100 microns in diameter in the mill;

    (c) filling the mill to a volume in excess of 90%;

    (d) operating the mill at tip speeds at least 20 meters/sec; and

    (e) limiting the residence time to less than about two minutes;

    .thereby producing particles having an average particle size less than about 0.1 micron from the feedstock.

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