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THE DESIGN OF TECHNOLOGICALLY EFFECTIVE AND ENVIRONMENTALLY BENIGN SOLVENT SUBSTITUTES
Citation:
Zhao**, R, H C. Cabezas*, AND S. Nishtala. THE DESIGN OF TECHNOLOGICALLY EFFECTIVE AND ENVIRONMENTALLY BENIGN SOLVENT SUBSTITUTES. Edition 767, Chapter 19, American Chemical Society, Washington, DC, (2001).
Description:
There is presently considerable interest in finding environmentally benign replacement solvents that can perform in many different applications as solvents normally do. This requires solvents with desirable properties, e.g., ability to dissolve certain compounds, and without other undesirable properties, e.g., toxicity. This complex problem can be simplified because the behavior of solvents in all applications is governed by universal mathematical expressions. The identity of the solvent in these expressions is represented by coefficients, e.g.,viscosity, density, activity coefficients, etc. Thus, the environmentally benign solvent design problem has been addressed by using property prediction and phase equilibrium analysis methods in a computer algorithm to design mixtures with specific properties. A classification of the necessary properties for solvent design is presented. The property categories include general, dynamic, and equilibrium properties, and environmental requirements, i.e., a VOC index and an environmental impact index, and performance requirements. These concepts form the basis of the PARIS II solvent design software which is near commercialization.