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Yourlocation: Home > News > Initial Studies on the Extraction of Aromatics with Sulfolane and its Combination with N-Methyl Pyrrolidone(NMP)
Initial Studies on the Extraction of Aromatics with Sulfolane and its Combination with N-Methyl Pyrrolidone(NMP).Liquid-liquid binodal curves have been determined for the quaternary sys-tems benzene-n-heptane-(sulfolane plus N-methyl pyrrolidone)(with different ra-tio by vol.)at 30±0.1℃ by the turbidity point titration method.Conjugate linesfor the above mentioned systems have also been determined in conjunction withthe physical properties,such as refractive index and specific gravity.With a view to evaluating the extractive properties of the combinedsolvents,binodal curves and conjugate lines have also been determined for thetertiary system benzene-n-heptane-sulfolane at 30±0.1℃ by the same way as forthe above-mentioned quaternary systems.Based on the solubility(S)and selectivity(β)calculated from the experimentaldata,it can be clearly seen that  N-Methyl PyrrolidoneNMP may be considered as a cosolvent decreas-ing the size of the two phase envelope.In addition,the effect of temperaturechanges was studied.

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