Share Note: This project has been completed and all data generated has been added to the 801 Member Database. Any additional experimental work in this area will be undertaken under Project 801. Project Description This experimental project is directed at obtaining phase equilibria and other data on systems of important industrial chemicals. Other systems studied will be selected specifically to augment predictive techniques such as UNIFAC (UNIQUAC Functional-group Activity Coefficients) or the group contribution method ASOG (Analytical Solution of Groups), which estimate phase equilibria from data based on the molecular group structure of each component. Project Objective To obtain experimental phase equilibrium and other data on binary and multicomponent mixtures that are valuable for designing important chemical processes, and also useful for understanding and correlating the behavior of mixing phenomena from group contributions (molecular structures) by general methods. Examples of such methods are UNIFAC and ASOG prediction procedures that are widely used in computer oriented design of chemical's separations. Over the project life, more than 315 systems were measured and most were not available previously anywhere else in the open literature. Project results have been published in the AIChE Symposium Series or the DIPPR® Data Series, and in the American Chemical Society's Journal of Chemical and Engineering Data.