SOLUBILITY OF PURE 1,3 BUTADIENE AND METHYL PROPENE AND THEIR MIXTURES IN PURE N-METHYL-2-PYRROLIDONE AND IN ITS AQUEOUS-SOLUTIONS

The solubility of pure 1,3 butadiene and methyl propene and their mixt ures in pure n-methyl-2-pyrrolidone and in its aqueous solutions was m easured at several temperatures and pressures. For this purpose, exper imental methodologies were established in order to evaluate thermodyna mic equilibrium variables. A simple weighing method was used to obtain the experimental data. From the experimental results, the parameters of conventional excess Gibbs free energy models, Wilson, NRTL and UNIQ UAC, were determined through the Maximum Likelihood method.