vertrel ® vs. other systems aqueous systems l l potential corrosion of metal parts l l low rinsing...
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Vertrel® vs. Other SystemsVertrel® vs. Other Systems
Aqueous systemsAqueous systems
Potential corrosion of metal parts Low rinsing quality Separate drying step needed, lower drying quality Longer cycle time Energy intense High capital investment for the equipment Disposal & recycling possibilities of contaminated water Water availability & price in some regions
H-1
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Vertrel® vs. Other SystemsVertrel® vs. Other Systems
Chlorinated & bromine-containing solventsChlorinated & bromine-containing solvents
Toxicity Material compatibility Ozone depletion Flashpoint controversy Odor Presence of stabilizers (Need of periodical monitoring to avoid
hydrolysis (acidification) of the solvent)
Difficult process monitoring Need to use expensive equipment
H-2
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Vertrel® vs. Other SystemsVertrel® vs. Other Systems
Alcohols and hydrocarbonsAlcohols and hydrocarbons
Flammability of alcohols Poor rinsing quality with hydrocarbons (no vapor zone) Difficult drying with hydrocarbons
(higher BP, thus higher drying temperature needed)
H-3
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Vertrel® vs. Other SystemsVertrel® vs. Other Systems
Hydrofluoroethers (HFE)Hydrofluoroethers (HFE)
More selective miscibility (less azeotropes available) Co-solvent systems are rarely justified Slightly lower acute toxicity effects Indication for potential of chronic toxicity Auto-ignition temperature (405ºC) Decomposition into PFIB when overheated (> 300°C) Concern of degradation to Trifluoroacetic Acid (TFA) in
the atmosphere, that may attack micro-organisms
H-4
Service Chimie : 5 place de l’église, 77400 Saint Thibault des vignes
: (33) 01 64 30 89 22 : (33) 01 64 30 87 49