This end of chapter module outlines the current methods of nonaqueous cleaning procedures while comparing the standard solvent perchloroethylene (PERC) to risk decreasing innovations employing
supercritical carbon dioxide(SCO2).
PERC is a nonpolar solvent used to dissolve hydrophobic greases and oils. Unfortunately this chemical is associated with soil contamination and long-term health consequences, being labeled a potential occupational carcinogen. As a viable alternative, supercritical carbon dioxide is being used in conjunction with specially constructed detergents to minimize risk and provide a greener solvent for the dry cleaning industry.
This module is one of nineteen end-of-chapter modules that integrate green chemistry with specific chemistry concepts within each chapter. This module includes four web investigations and three separate exercises focused on communicating findings using a variety of reporting strategies. This material included in chapter 17 entitled "Household Chemicals: Helps and Hazards."
Summary prepared January 2008 by Richard Craig Timmerman and Dana Garves, University of Oregon.