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US 6,274,031 B1Granted
Transport desulfurization process utilizing a sulfur sorbent that is both fluidizable and circulatable and a method of making such sulfur sorbent
AssigneePhillips Petroleum Company
InventorsGyanesh P. Khare, Donald R. Engelbert, Bryan W. Cass
Life of this patent
Estimating the term…
Abstract
A novel circulatable sorbent material suitable for use in a transport desulfurization system for removing sulfur from a fluid stream containing sulfur and the use thereof in such a transport desulfurization system. The transport desulfurization process utilizes a circulatable particulate material containing alumina, silica, zinc oxide and a metal oxide which is contacted with a fluid stream and thereafter separated and reused with a portion being regenerated.
Claims36
A transport desulfurization process comprising:
- contacting a sulfur-containing fluid stream within a fluidization zone containing a fluidized bed of a circulatable particulate material having a mean particle size in the range of from about 20 micrometers to about 500 micrometers and comprising alumina, silica, zinc oxide, and an effective concentration of a metal oxide for providing an enhanced attrition resistance of said circulatable particulate material and wherein said circulatable particulate material is circulatable within a fluidization zone in a first linear direction and is circulatable within a transfer zone in a second linear direction wherein said first linear direction is upwardly against the direction of gravitational force and said second linear direction is downwardly in the direction of gravitational force, and wherein said circulatable particulate material is circulated in said first linear direction at a first linear velocity in the range of from about 3 to about 40 feet per second and in said second linear direction at a second linear velocity less than about 25 feet per second, and wherein said metal oxide is an oxide of molybdenum, tungsten or one or more Group VIII metals;
- recovering a separated circulatable particulate material and a stream having a concentration of sulfur lower than that of said fluid stream;
- passing said separated circulatable particulate material to said transfer zone wherein said separated circulatable particulate material is circulating in said second linear direction;
- and
- returning a major portion of said separated circulatable particulate material to said fluidization zone for use as said circulatable particulate material.
2 more elements
A transport desulfurization process comprising:
- contacting a sulfur-containing fluid stream within a fluidization zone containing a fluidized bed of a circulatable particulate material comprising alumina, silica, zinc oxide and metal oxide, said circulatable particulate material having a mean particle size in the range of from about 20 micrometers to about 500 micrometers and an attrition resistance of at least about 60 percent and wherein said circulatable particulate material is circulating in a first linear direction;
- recovering a separated circulatable particulate material and a stream having a concentration of sulfur lower than that of said fluid stream;
- passing said separated circulatable particulate material to a transfer zone wherein said separated circulatable particulate material is circulating in a second linear direction;
- and
- returning a major portion of said separated circulatable particulate material to said fluidization zone for use as said circulatable particulate material and wherein said metal oxide is an oxide of molybdenum, tungsten, or one or more Group VIII metals.
2 more elements
A transport desulfurization process comprising:
- contacting a sulfur-containing fluid stream within a fluidization zone containing a fluidized bed of a circulatable particulate material comprising alumina, silica, zinc oxide and a concentration of metal oxide in the range of from about 0.1 weight percent to about 40 weight percent, said circulatable particulate material having a mean particle size in the range of from about 20 micrometers to about 500 micrometers and wherein said circulatable particulate material is circulating in a first linear direction;
- recovering a separated circulatable particulate material and a stream having a concentration of sulfur lower than that of said fluid steam;
- passing said separated circulatable particulate material to a transfer zone wherein said separated circulatable particulate material is circulating in a second linear direction;
- and
- returning a major portion of said separated circulatable particulate material to said fluidization zone for use as said circulatable particulate material and wherein said metal oxide is an oxide of molybdenum, tungsten, or one or more Group VIII metals.
2 more elements
Dependencies are inferred from the claim text.