Process and catalyst for desulfurization of hydrocarbonaceous oil stream
AssigneeSaudi Arabian Oil Company
InventorKi-Hyouk Choi
Life of this patent
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Abstract
The invention relates to a process and catalyst for the oxidative desulfurization of hydrocarbonaceous oil. In one aspect, solid carbon materials are provided having stable sulfur trioxide and nitrogen dioxide oxidative species on the surface thereof. Such materials are useful in the production of low sulfur hydrocarbon feedstocks and in the removal of refractory sulfur compounds.
Claims16
A method for removing sulfur from a hydrocarbonaceous feedstock, comprising the steps of:
- contacting a hydrocarbonaceous feedstock that includes sulfur with a oxidative desulfurization catalyst to selectively oxidize at least a portion of the sulfur present to produce oxidized sulfur compounds and a low sulfur hydrocarbonaceous feedstock, said oxidative desulfurization catalyst comprising a solid carbon support material having oxidizing groups appended to the surface, the oxidizing groups being selected from the group consisting of sulfur trioxide, nitrogen dioxide, and combinations thereof;
- separating the oxidized sulfur compounds from low sulfur hydrocarbonaceous feedstock;
- and
- recovering the low sulfur hydrocarbonaceous feedstock.
A method for removing sulfur from a hydrocarbonaceous feedstock, comprising the steps of:
- contacting a hydrocarbonaceous feedstock that includes sulfur with a oxidative desulfurization catalyst to selectively oxidize at least a portion of the sulfur present to produce oxidized sulfur compounds and a low sulfur hydrocarbonaceous feedstock, said oxidative desulfurization catalyst comprising a solid carbon support material having sulfur trioxide oxidizing groups appended to the surface;
- separating the oxidized sulfur compounds from low sulfur hydrocarbonaceous feedstock;
- and
- recovering the low sulfur hydrocarbonaceous feedstock;
- wherein the sulfur trioxide oxidizing groups are appended to the surface of the solid carbon support by contacting the solid carbon support material with a gas that comprises sulfur dioxide to append sulfur dioxide to the surface of the solid carbon support material and then contacting the solid carbon support material with molecular oxygen to produce sulfur trioxide groups on the surface of the surface of the solid carbon support material.
A method for removing sulfur from a hydrocarbonaceous feedstock, comprising the steps of:
- contacting a hydrocarbonaceous feedstock that includes sulfur with a oxidative desulfurization catalyst to selectively oxidize at least a portion of the sulfur present to produce oxidized sulfur compounds and a low sulfur hydrocarbonaceous feedstock, said oxidative desulfurization catalyst comprising a solid carbon support material having nitrogen dioxide oxidizing groups appended to the surface;
- separating the oxidized sulfur compounds from low sulfur hydrocarbonaceous feedstock;
- and
- recovering the low sulfur hydrocarbonaceous feedstock;
- wherein the nitrogen dioxide oxidizing groups are appended to the surface of the solid carbon support by contacting the solid carbon support material with a gas that comprises nitrogen oxide or nitrogen dioxide to append sulfur dioxide to the surface of the solid carbon support material and then contacting the solid carbon support material with molecular oxygen to produce nitrogen dioxide groups on the surface of the surface of the solid carbon support material.
Dependencies are inferred from the claim text.