Abstract: In order to effectively solve the problem of the disposal of ethylene tar，a by-product of ethylene plant, the commercial blending test of ethylene tar was carried out in Zhejiang Petrochemical Co., Ltd.,by using the highly adaptable and highly dispersed molybdenum-based oil-soluble catalyst in slurry bed residue hydrotreating unit and the reactor without fixed catalyst bed. Under the conditions of ethylene tar blending ratio of 2% and 4% , the changes and influences of raw oil composition, key operating parameters, quality and yield of the target product were compared and analyzed. The results showed that the slurry bed residue hydrogtreating unit could process ethylene tar completely, which is one of the ideal processing routes for ethylene tar under the present conditions.

Key words: ethylene tar, slurry bed, residue hydrotreating, catalyst