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A crystallization‐based process that separates pure fullerenes C60 and C70 from their mixture using o‐xylene as the solvent has been developed. Isothermal solid–liquid equilibrium phase diagrams of the C60‐C70‐o‐xylene ternary system for a number of temperatures were first determined at 1 atm. Taking advantage of the shift in solvent‐free composition of the C60‐C70 double saturation point with temperature...
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