Dry cleaning system using densified carbon dioxide and a surfactant adjunct
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United States of America Patent
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Nov 2, 1999
Grant Date -
N/A
app pub date -
May 6, 1998
filing date -
May 6, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for dry cleaning soils from fabrics is described which contains densified carbon dioxide combined with a selected surfactant. The densified carbon dioxide is used in a temperature range of about -78.5.degree. C. to about 100.degree. C. and a pressure range of about 14.7 psi to about 10,000 psi. The surfactant is selected from one of two groups of compounds having a formula ##STR1## as described in the text or a second group of siloxane compounds having a formula [AB].sub.y as described. A process for using the dry cleaning system is also described.
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