Investigations on Romashkino asphaltic bitumen. 1. Use of ion-exchange and adsorption chromatography for the separation of maltenes

Use has been made of ion-exchange resins to remove acid and base fractions from maltenes originally separated from Romashkino asphaltic bitumen. The effect has been studied of the ion-exchange resin treatment on the group-type composition of maltenes using adsorption chromatography through alumina. Yields, elemental and densimetric analyses of sub-fractions obtained have been given. Data from the separation will aid in the characterization of the nonhydrocarbon materials generally described as resins.