PROCESS AND APPARATUS FOR SOLVENT-DEASPHALTING RESIDUAL OIL CONTAINING ASPHALTENES

摘要

A feed stream (12) of asphaltene-containing residual oil is processed by contacting the feed stream with a solvent (13) to form a first primary liquid stream (14) containing deasphalted oil and some solvent, and a second primary liquid stream (15) containing asphaltene and some solvent. The first and second liquid streams (14 and 15) are heated; and the heated streams (14 and 15) are respectively processed to recover the solvent and to produce a deasphalted oil product stream (16) substantially free of solvent, and an asphaltene product stream (18) substantially free of solvent. A portion (40) of the DAO product stream (16) is heated (41) to produce a stream (42) of heated deasphalted oil, a portion (43) of which indirectly heats the two primary liquid streams (14 and 15).