A supereritical fluid extraction process is being investigated for this purpose, A flow apparatus is described for measuring phase equilibrium data for mixtures of solvent and pitch at temperatures up to 675K and pressures to 350 bar.

• 为此目的,我们正在研究超临界流体萃取工艺。 本文所描述的测定溶剂和沥青混合物的相平衡数据的流体装置,能在沥青和溶剂混合后,加热直到675K和350巴的压力条件下测得相平衡数据。