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This method was designed to facilitate the replacement of environmentally objectionable industrial solvents by using computer aided methods to design benign replacement solvents or solvent mixtures. The method generates a short list of recommended replacement solvents or mixtures. Including an appropriate set of solvent parameters (such as density, viscosity, surface tension, and solvent capacity) and performance requirements (such as density, viscosity, surface tension, solvent capacity) in considering replacement solvents is extremely important to ensure that the replacement will perform adequately. A new program for assisting the replacement of industrial solvents entitled PARIS II for PCs using the WINDOWS operating system is near the end of development. The program is capable of going beyond solvent substitution into solvent design. The solvent design capability allows the user to match or to enhance desirable solvent properties while simultaneously suppressing undesirable ones such as, for example, toxicity. The list of solvent properties adequately characterizes both the static and the dynamic behavior of the solvents and mixtures. The list of solvent performance requirements includes comprehensive measures of toxicity and means to estimate volatile organic emissions among other items. The program develops a list of ranked candidate replacement pure solvents or solvent mixtures for consideration by the user. The software is now undergoing peer-review and beta testing prior to commercial release under a Cooperative Research and Development Agreement (CRADA) between the U.S. EPA and Technical Database Services, Inc. For additional information on PARIS II, visit the website at http://www.epa.gov/ORD/NRMRL/std/sab/sim_paris_ii.htm. To access directly from this website, click on downloads on the navigation bar.

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