Densification of aerated powders using positive pressure
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United States of America Patent
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Issued Date -
Jun 17, 2004
app pub date -
Dec 16, 2002
filing date -
Dec 16, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A process for increasing the bulk density of an aerated powder is provided. The powder is placed in a container. The container is then closed and the gas pressure within the container is increased to a level above atmospheric pressure and at a rate sufficient to cause the powder to compact before a substantial portion of said pressurization gas diffuses into said powder. In one embodiment, the process is utilized to increase the bulk density of an aerated, free-flowing titanium dioxide pigment. Apparatus for carrying out the process is also provided.
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