NDLI: Environmental advantages of the closed-loop, semi-aqueous cleaning process as a CFC replacement

Content Provider	IEEE Xplore Digital Library
Author	Fritz, H.L.
Copyright Year	1991
Description	Author affiliation: DuPont Co., Research Triangle Park, NC, USA (Fritz, H.L.)
Abstract	The planned phase-out of CFCs (chlorofluorocarbons) and a heightened environmental awareness have caused many printed wiring board (PWB) assemblers to investigate alternative cleaning technologies. It is noted that semi-aqueous cleaning appears to be the best alternative available because it provides superior performance to CFC-113/methanol and offers ecological advantages. It also presents new technical challenges, such as waste management. Three technologies for treating rinse water-carbon plus ion exchange, advanced oxidation plus ion exchange, and membrane separation-were studied. Data from these studies are presented. To date, membrane separation is the most promising technology due to its excellent performance and cost-effectiveness. Membrane separation technology offers technical advantages over the other two technologies; it removes organics and ionics simultaneously and it handles biphasic rinse water well. In addition to superior performance, membrane separation technology is less expensive to operate than carbon treatment with ion exchange.<>
Starting Page	639
Ending Page	646
File Size	568504
Page Count	8
File Format	PDF
ISBN	0780300122
DOI	10.1109/ECTC.1991.163947
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1991-05-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cleaning Soil Solvents Assembly Water pollution Wastewater treatment Oxidation Circuits Waste disposal Process design
Content Type	Text
Resource Type	Article

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