Two-stage, close-coupled, dual-catalytic heavy oil hydroconversion process

摘要

A process for the production of high yields of high quality products from heavy hydrocarbonaceous feedstock comprising a two-stage, close-coupled process, wherein the first stage comprises a thermal-catalytic zone into which is introduced a mixture comprising the feedstock, coal, dispersed catalyst, and hydrogen; and the second, close-coupled stage comprises a catalytic-hydrotreating zone into which substantially all the effluent from the first stage is directly passed and processed under hydrotreating conditions.

主权项

1. A process for conversion of heavy oils to produce lower boiling hydrocarbon products comprising:
a) dispersing finely divided coal and catalyst in a heavy oil feedstock to obtain a dispersed mixture,
wherein the amount of coal relative to the feedstock is from about 3 to 10 percent by weight and the amount of dispersed catalyst relative to the feedstock is from about 0.1 to 5 percent by weight, b) heating and passing the dispersed mixture together with hydrogen to a first reaction zone comprising one or more thermo-catalytic reactors, c) converting a portion of the coal into coal liquids in the first reaction zone, d) mixing heavy oils in the heavy oil feedstock, the coal liquids, and the dispersed catalyst in the first reaction zone to convert the heavy oils to an effluent comprising hydrocarbons boiling below 1000.degree. F., e) passing at least a portion of the effluent comprising hydrocarbons boiling below 1000.degree. F. reduced in temperature to a second reaction zone comprising one or more catalytic-hydrotreating reactors and having a supported hydrotreating catalyst, and f) recovering a product of the second reaction zone,
wherein the first and second reaction zones are close-coupled and operated at elevated temperature and pressure.