Process for conversion and size reduction of solid particles

Solid material comminution or disintegration – Processes – By operations other than force of contact with solid surface

Reexamination Certificate

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C241S029000

Reexamination Certificate

active

07448561

ABSTRACT:
A combined process for the conversion of solid starting particles into solid intermediate particles and reducing the median diameter of the intermediate particles to obtain product particles. This process involves flowing a suspension of starting particles through a series of at least two conversion vessels, thereby converting at least part of the starting particles into intermediate particles, adding a supercritical fluid to one or more of the conversion vessels, thereby forming a supercritical suspension, and releasing pressure from the supercritical suspension, thereby expanding the suspension and converting the intermediate particles into product particles.

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patent: 1 202 258 (1965-10-01), None
patent: 62-285777 (1987-12-01), None
Jung, et al; “Particle Design Using Supercritical Fluids: Literature And Patent Survey;” Journal Of Supercritical Fluids; vol. 20; Aug. 2001; pp. 179-219.
Wei, et al; “Mixing And Characterization Of Nanosized Powders: An Assessment Of Different Techniques;” Journal Of Nanoparticle Research; vol. 4; 2002; pp. 21-41.

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