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Preparation of finely-divided, homodisperse suspensions

  • US 6,048,906 A
  • Filed: 01/05/1998
  • Issued: 04/11/2000
  • Est. Priority Date: 01/10/1997
  • Status: Expired due to Fees
First Claim
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1. A process for preparing finely-divided, homodisperse dispersions from a liquid medium having sparingly soluble particles contained therein, the particles being produced in a vertically oriented tubular reactor by a reaction of reactants dissolved in the medium, the process comprising the steps of introducing solutions of the reactants, at least at reaction temperature, into the tubular reactor separately from one another, as coaxial, laminar or parallel flows, and shielding the solutions from the reactor wall, and whereinthe solution of a first reactant is introduced through a multiplicity of bores of a concentric nozzle plate,a reactant-free liquid medium is introduced through a first annular gap arranged concentrically around the nozzle plate,the solution of a second reactant is introduced through a second annular gap arranged concentrically around the first, anda reactant-free liquid medium is introduced through a third annular gap arranged concentrically around the second.

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