Method for Suspending and Introducing Solid Matter in a High-Pressure Process
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United States of America Patent
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Issued Date -
Feb 14, 2008
app pub date -
Mar 16, 2005
filing date -
Mar 17, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to a method for suspending and introducing solid matter in a high-pressure process, for example colorant pigments in a high-pressure process, in which a supercritical fluid is used as the process medium and a pressure in excess of 150 bar prevails. According to the invention, the suspension of the solid matter takes place at a low-pressure in a completely separate suspension method. In the latter, the solid matter is suspended or partially dissolved in a non-critical, liquid gas. The pressure in said suspension method is less than 90% of the critical pressure of the liquid gas. The suspension is introduced into the high-pressure process by means of a pump.
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