In order to provide fundamental data for the industrial design of the supercritical fluid extraction, the solubility of benzoic acid was measured in supercritical carbon dioxide without and with cosolvents at the mole fraction of 0.02(ethyl acetate, ethanol or ethyl acetate plus ethanol (molar ratio 1:1)), at the temperature of 35.0, 45.0, 55.0 degrees centigrade and under pressure from 8.0 to 23.0 Mpa, by using a flow-type phase equilibrium apparatus. This article analyzed the influence of temperature and ...