Slurry hydrotreating process
AssigneeExxon Research & Engineering Co.
InventorsWilliam E. Winter, Jr., Willard H. Sawyer
Life of this patent
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Abstract
A slurry hydrotreating process is described in which a hydrotreating catalyst of small particle size is contacted with a heavy fossil fuel. High catalyst activity is maintained by circulating the catalyst between a hydrotreating zone and a reactivating zone where the catalyst is hydrogen stripped.
Claims22
A slurry hydrotreating process for hydrotreating a heavy fossil fuel to hydrogenate heavy aromatics and remove sulfur, the process comprising:
- reacting the heavy fossil fuel in a hydrotreating zone with hydrogen in the presence of a non-noble metal containing hydrotreating catalyst;
- separating the catalyst from the product of the hydrotreating zone;
- reactivating the catalyst in a reactivating zone, separate from the hydrotreating zone, by hydrogen stripping;
- and
- recycling the reactivated catalyst to the hydrotreating zone.
The process of claim wherein the catalyst is comprised of molybdenum sulfide.
A slurry hydrotreating process for hydrotreating a heavy fossil fuel to hydrogenate heavy aromatics and remove sulfur, the process comprising:
- reacting the heavy fossil fuel in a hydrotreating zone with hydrogen in the presence of a non-noble metal containing hydrotreating catalyst wherein the catalyst is in the form of a slurry at a solids weight percent in the range of about 10 to 70 weight percent;
- separating the catalyst from the product of the hydrotreating zone;
- reactivating the catalyst in a reactivating zone, separate from the hydrotreating zone, at a temperature of between about 650.degree. to 780.degree. F. and a pressure of between about 800 to 4000 psig with hydrogen at a stripping rate of 0.15 to 7 SCF/lb cat-hr;
- and
- recycling the reactivated catalyst at a rate of 0.1 to 0.3 lbs of reactivated catalyst per pound of feed to the hydrotreating zone.
Dependencies are inferred from the claim text.