Patent ID: 6365555
Filing Date: 2002-04-02
Classification: B01J,B22F,B82Y,C01B,C01G,C01P

Abstract:
A process for the preparation of nanostructured materials in high phase purities comprising:a) mixing a metal containing solution with a precipitating agent to form a mixed solution that precipitates a product; b) passing the mixed solution at elevated pressure and at a velocity into a cavitation chamber, wherein said cavitation chamber has means for creating a cavitation zone and means for controlling said zone, and wherein cavitation of the mixed solution takes place, forming a cavitated precipitated product, said cavitation chamber comprising: a flow-through channel having a flow area, internally containing at least one first element that produces a local constriction of the flow area, and having an outlet downstream of the local constriction; and a second element that produces a second local constriction positioned at the outlet, wherein a cavitation zone is formed immediately after the first element, and an elevated pressure zone is created between the cavitation zone and the second local constriction; c) removing the cavitated precipitated product and the mixed solution from the cavitation chamber; and d) separating the cavitated precipitated product from the mixed solution.