Is. Khusnutdinov et al., COMPARISON OF VARIOUS METHODS FOR FRACTIONATION OF HIGH-BOILING ORGANIC RAW-MATERIALS, Russian journal of applied chemistry, 71(6), 1998, pp. 1054-1058
A method was developed for low-temperature fractionation of natural bi
tumens using solvents. The results of separation of natural bitumens b
y distillation and low-temperature fractionation are compared. The com
mon features and differences in distribution of components over fracti
ons are revealed.