DIESEL DISTILLATE HYDROFINING PROCESS

摘要

FIELD: petroleum processing. ^ SUBSTANCE: diesel distillates are passed through "filtering" bed composed by ceramic ball bed, which occupies 0.2 to 5.0% of reaction space. Feed is then subjected (i) to hydrofining in presence of catalyst present in the form of contact bed containing alumina-supported molybdenum oxide (2-10%) occupying 0.5 to 10% of reaction space and (ii) to hydrogenation in presence of alumino-nickel-molybdenum and/or alumino-cobalt-molybdenum catalyst. Process is conducted at 340-400 C, pressure 4-10 MPa, volumetric feed supply rate 0.5-3.0 h-1, and hydrogen-containing gas-to-feed volume ratio 400-1200. Invention allows level of sulfur to be lowered to 0.005 wt % or below with amount of polycyclic aromatics being below 11 wt %. ^ EFFECT: simplified technology and improved quality of product containing negligible quantities of sulfur. ^ 2 cl, 4 ex