Experimental Measurements and Correlation of the Solubility of Three Primary Amides in Supercritical CO2: Acetanilide, Propanamide, and Butanamide Coelho, J.P.; Naydenov, G.P.; Yankov, D.S.; Stateva, R.P.; Journal of Chemical & Engineering Data 2013, 58, 2110-2115