METHOD OF SEPARATING FULLERENES Russian patent published in 2015 - IPC C01B31/02 B82B3/00 B82Y40/00 B01D9/02 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry. A method of separating fullerenes includes dissolving fullerenes in o-xylene, high-temperature treatment of the obtained solution at 70-90°C for 60-120 minutes to obtain a C₆₀ concentrate and a solution which is fed for low-temperature treatment at temperature of (-15) to (-25)°C for 10-30 hours. Separation is carried out in multiple steps to obtain at each n step C₆₀ and C₇₀ concentrates with counterflow of the solutions and the solid phase from the high-temperature treatment. Several high-temperature treatment steps are carried out at each n step. At the first high-temperature treatment step of each n step, a solid extract of a fullerene mixture is fed and at the next steps, a solid phase from the previous high-temperature treatment step is fed. A solution from the first high-temperature treatment step is fed for low-temperature treatment to obtain a C₇₀ concentrate and a solution which is fed to the last high-temperature treatment step. A solution from the next high-temperature treatment step is fed as a recycled solution to the previous step, and a solution from the second high-temperature treatment step is fed for mixing with the solid extract of the fullerene mixture of the next n>1 step. The C₆₀ concentrate is the solid phase of the last high-temperature treatment step of each n step.

EFFECT: low material consumption and simple process.

2 cl, 2 dwg, 1 tbl, 2 ex