METHOD OF PURIFYING PERFLUORODECALIN Russian patent published in 2015 - IPC C07C23/20 C07C17/392 C07C17/354 

FIELD: chemistry.

SUBSTANCE: method includes crystallising perfluorodecalin in two steps: at the first step, crystallisation is carried out while reducing the temperature to minus 17°C - minus 18°C at a rate of 1-2°C per minute while stirring; the mass is held at a temperature of minus 17°C - minus 18°C for 30-35 minutes, filtered and dried and the obtained crystals are separated; the crystals are then melted at ambient temperature; at the second step crystallisation is repeated at the same conditions, but while reducing temperature to minus 15°C. The product obtained using the present method has purity higher than 99 wt %.

EFFECT: high purity of the finished product.

6 ex