Two-stage, close-coupled, dual-catalytic heavy oil hydroconversion process
Assignee4CRGroup LLC
InventorsDennis R. Cash, Graham J. Forder, David S. Mitchell, Joe W. Rosenthal
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Abstract
A process for the production of high yields of high quality products from heavy hydrocarbonaceous feedstock is provided 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.
Claims27
A two-stage, close-coupled process for converting the portion boiling above 1000 degree F. of a heavy hydrocarbonaceous feedstock to produce high yields of high quality fuels boiling below 1000 degrees F. by:
- a. forming a slurry by dispersing within said feedstocks
- i. finely divided coal particles and
- ii. finely divided dispersed catalyst particles having activity in the presence of hydrogen and then
- b. introducing said slurry into a first-stage thermal-catalytic zone under conditions sufficient to substantially convert a significant amount of the hydrocarbons in said feedstock boiling above 1000.degree. F. and the finely divided coal particles to hydrocarbons boiling below 1000.degree. F and
- c. rapidly and without substantial reduction of pressure through the system passing a substantial portion of the substantially converted effluent of said first-stage thermal-catalytic zone directly into a second-stage catalytic-hydrotreating reaction zone at a reduced temperature relative to said first-stage thermal-catalytic zone and contacting said effluent with a supported hydroprocessing catalyst under hydrotreating conditions, including a temperature in the range of 600.degree. F. to 800.degree. F. and then
- d. recovering the effluent from said catalytic-hydrotreating reaction zone.
Dependencies are inferred from the claim text.