(VAPOR PLUS LIQUID) EQUILIBRIA OF (ALKOXYALKANES PLUS ALKANES, OR O-XYLENE, OR WATER, OR METHANOL) FOR ETHER MOLE FRACTIONS 0 TO 0.5, BETWEEN TEMPERATURES 293-K AND 323-K

Modern environmentally beneficial methods of formulating motor gasolin e often use ethers and/or alcohols as octane improvers. Thus, the ther mophysical properties of these substances have become important in pro cess engineering design, the simulation of gasoline blending operation s, and engine operability. In all of these applications phase equilibr ium properties are represented by thermodynamic models, which are deri ved from a combination of theory and experimental phase equilibrium da ta. This work seeks to quantify these models by careful measurement of key thermodynamic properties. For that purpose (vapour + liquid) equi librium measurements on 2-methoxy-2-methylpropane, 2-ethoxy-2-methylpr opane, and 2-methoxy-2-methylbutane with various alkanes, o-xylene, me thanol, and water have been made using a static experimental method, a t ether mole fractions of x = 0 to x = 0.5 over a temperature range of 293 K to 323 K. (C) 1997 Academic Press Limited.