No abstract

Hydrocrackingof petroleum heavy oils using transition metal-loaded zeolite catalyst was examined. Deasphalted oil (DAO) derived from vacuum residue of a mixture of Arabian light and medium crudes was successfully converted to gasoline fraction, attaining yield of more than 70%, using palladium and nickel co-loaded process is discussed briefly. The authors also tried hydrocracking of fraction heavier than DAO, i.e. maltene, this affording gaseous products (C2-C4) and gasoline fraction, 35% and 52%, respectively, under the following