ON LINE HYDROTREATING TO PRODUCE FINISHED PRODUCTS

摘要

Raw shale oil containing precipitable compounds such as iron and arsenic are preheated to below the precipitation temperature and then mixed with hot recycled hydrogen and oil, and catalytically hydrocracked in an ebullated bed catalytic reactor. The metal compounds are deposited on the catalyst in the reactor, from which they are withdrawn along with used catalyst which is replaced with fresh catalyst. The reactor effluent is further hydrotreated in a fixed-bed catalyst reactor, usually at extreme conditions of 780-830.degree.F and 1800-2500 psig hydrogen partial pressure. The resulting material is phase-separated and distilled to provide jet and diesel fuel oil product meeting military specifications, while clean hydrogen and heavy oil streams are reheated and recycled to the ebullated bed reactor.