Liquid carbon dioxide cleaning using agitation enhancements at low temperature
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United States of America Patent
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Jul 24, 2001
Grant Date -
N/A
app pub date -
Jul 7, 2000
filing date -
Jan 7, 1998
priority date (Note) -
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Abstract
A cleaning system and method utilizing sonic whistle and other agitation methods to enhance the soil removal and mass transport capacity of the liquid carbon dioxide at low process temperatures. Agitation devices disposed in or couple to a cleaning chamber, and cause the liquid carbon dioxide to ultrasonically emulsify and disperse non-miscible liquids or insoluble solids, such as remove low solubility oils and greases. Cleaning is accomplished at temperatures between -68.degree. F. and 32.degree. F., and the temperature of the liquid carbon dioxide is typically below 32.degree. F.
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