Apparatus and method for supercritical fluid extraction
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United States of America Patent
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Jul 21, 1992
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N/A
app pub date -
Nov 1, 1991
filing date -
Jul 13, 1990
priority date (Note) -
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Abstract
An apparatus for supercritical fluid extraction incorporates a removable extraction cartridge which in operation has insignificant pressure difference between its inside and outside walls. Because of the low pressure difference, the extraction cartridge need not have the strength to withstand significant pressure and can be made out of molded plastic for disposable use as well as stainless steel and machined plastic for reusability. The extraction cartridge can be removed and opened for sample access without the use of tools. The outside of the cartridge can be purged after it is installed in a heated high pressure vessel to remove contamination from its exterior.
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