METHODS FOR UPGRADING OF CONTAMINATED HYDROCARBON STREAMS
First Claim
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1. A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants, the method comprising:
- contacting the heteroatom-containing hydrocarbon feed with an oxidant and an immiscible acid;
contacting the oxidized heteroatom-containing hydrocarbon feed with at least one caustic and at least one selectivity promoter; and
removing the heteroatom contaminants from the heteroatom-containing hydrocarbon feed.
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Abstract
A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants is disclosed. The method includes contacting the heteroatom-containing hydrocarbon feed with an oxidant and an immiscible acid to oxidize the heteroatoms, contacting the oxidized-heteroatom-containing hydrocarbon feed with caustic and a selectivity promoter, and removing the heteroatom contaminants from the heteroatom-containing hydrocarbon feed. The oxidant may be used in the presence of a catalyst.
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23 Claims
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1. A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants, the method comprising:
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contacting the heteroatom-containing hydrocarbon feed with an oxidant and an immiscible acid; contacting the oxidized heteroatom-containing hydrocarbon feed with at least one caustic and at least one selectivity promoter; and removing the heteroatom contaminants from the heteroatom-containing hydrocarbon feed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants, the method comprising:
contacting the heteroatom-containing hydrocarbon feed with at least one oxidant to oxidize at least a portion of the heteroatom contaminants to form a first intermediate stream; contacting the first intermediate stream with at least one oxidant and at least one immiscible acid to oxide at least a portion of any remaining heteroatom contaminants to form a second intermediate stream; contacting the second intermediate stream with at least one caustic and at least one selectivity promoter to form a third intermediate stream; separating a substantially heteroatom-free hydrocarbon product from the third intermediate stream; recovering the at least one caustic and at least one selectivity promoter from the third intermediate stream; and
recycling the recovered at least one caustic and at least one selectivity promoter.
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23. A method of upgrading a heteroatom-containing hydrocarbon feed by removing heteroatom contaminants, the method comprising oxidizing dibenzothiophenes in the heteroatom-containing feed to sulfones, contacting the sulfones under oxidizing biphasic conditions with an immiscible acid and an oxidant to remove at least a portion of the heteroatom contaminants, then reacting the sulfones with caustic and a selectivity promoter, and separating a substantially heteroatom-free hydrocarbon product.
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