Cleaning and liquid contact with solids – Processes – Using solid work treating agents
Patent
1987-11-03
1989-02-21
Sneed, H. M. S.
Cleaning and liquid contact with solids
Processes
Using solid work treating agents
134 93, 261 75, 261 89, 261 95, 261158, 51320, 51410, B08B 700
Patent
active
048061719
ABSTRACT:
Apparatus for removing small particles from a substrate comprising a source of fluid carbon dioxide, a first means for expanding a portion of the fluid carbon dioxide into a first mixture containing gaseous carbon dioxide and fine droplets of liquid carbon dioxide, coalescing means for converting the first mixture into a second mixture containing gaseous carbon dioxide and larger liquid droplets of carbon dioxide, second expansion means for converting said second mixture into a third mixture containing solid particles of carbon dioxide and gaseous carbon dioxide, and means for directing said third mixture toward the substrate. Also disclosed are methods for removing fine particles from substrates utilizing the subject apparatus.
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Clark James D.
Weltmer, Jr. William R.
Whitlock Walter H.
Cassett Larry R.
Cohen Sharon T.
Sneed H. M. S.
Swope R. Hain
The BOC Group Inc.
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