Method for the selective removal of aromatic and / or phenolic components from a construction material comprising asphalt containing coal tar pitch and the contaminated sub-base of the road constructions

摘要

The present invention relates to a method for the selective removal of aromatic and / or phenolic components from a construction material comprising asphalt containing coal tar pitch and the contaminated sub-base of the road constructions wherein the construction material is contacted with water in liquid phase at temperatures between 100 - 290°C and pressures between 5 - 80 bar and the aromatic and /or phenolic components are transferred from the asphalt into the water. The invention further relates to a process of recycling a construction material comprising asphalt containing coal tar pitch and the contaminated sub-base of the road constructionsand the use of the recycled construction material for the road construction.