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Parts Cleaning Competitive Matrix
(Garment Cleaning Matrix)
Return to Parts and Garment Cleaning
| Characteristics |
Chlorinated
Solvents |
Water |
CO2
Microemulsion |
| Cleaning ability |
good |
poor |
good
Performance is
similar to CFC performance but without ozone-layer
damage. |
| Energy Consumption |
moderate |
high
Drying process (heating of metal
parts) in aqueous process leads to largest energy usage. |
moderate |
| Rusting |
no |
yes
Flash rusting is a big problem with
aqueous systems. |
no |
| Ability to leave protective coating |
no |
no |
yes |
| Floor space |
Compact |
Expansive
On a manufacturing floor,
space is money. |
Compact |
| Environmental Restrictions |
(VOCs, CFCs)
Many excellent cleaning
solvents were banned by the Montreal Protocol. |
Water Treatment
|
Nontoxic,
nonhazardous |
| Waste issues |
Solvent and still residues |
Wastewater treatment |
Minimal,
Recyclable |
For information about supercritical fluid capabilities at PNNL,
please contact Clement Yonker, at (509) 372-4748, clem.yonker@pnl.gov.
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