INTEGRATED DEASPHALTING AND OXIDATIVE REMOVAL OF HETEROATOM HYDROCARBON COMPOUNDS FROM LIQUID HYDROCARBON FEEDSTOCKS
First Claim
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1. A process for deasphalting and reducing the content of heteroatom-containing hydrocarbon molecules in a liquid hydrocarbon feedstock, the liquid hydrocarbon feedstock having an asphaltic content and heteroatom-containing hydrocarbon molecules, the process comprising:
- introducing the liquid hydrocarbon feedstock, solvent, an oxidant, and an oxidation catalyst as an intimate mixture into a solvent deashphalting unit that includes at least one settler;
maintaining the mixture in the settler for a residence time that is sufficient for substantial completion of oxidative reaction between the oxidizing agent and the heteroatom-containing hydrocarbon molecules, and thereafter for phase separation of the reaction mixture into a reduced asphalt content phase and an asphalt phase, wherein the oxidized heteroatom-containing hydrocarbon molecules are in the asphalt phase;
discharging the asphalt phase containing oxidized heteroatom-containing hydrocarbon molecules; and
recovering the reduced asphalt content phase having a reduced content of heteroatom-containing hydrocarbon molecules.
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Abstract
A system and process are provided for integrated deasphalting and desulfurization of hydrocarbon feedstock in which the hydrocarbon feedstock, an oxidant, and an oxidation catalyst are mixed prior to passage into a primary settler of a solvent deasphalting unit. Oxidation products, including oxidized organosulfur compounds, are discharged with the asphalt phase.
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17 Claims
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1. A process for deasphalting and reducing the content of heteroatom-containing hydrocarbon molecules in a liquid hydrocarbon feedstock, the liquid hydrocarbon feedstock having an asphaltic content and heteroatom-containing hydrocarbon molecules, the process comprising:
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introducing the liquid hydrocarbon feedstock, solvent, an oxidant, and an oxidation catalyst as an intimate mixture into a solvent deashphalting unit that includes at least one settler; maintaining the mixture in the settler for a residence time that is sufficient for substantial completion of oxidative reaction between the oxidizing agent and the heteroatom-containing hydrocarbon molecules, and thereafter for phase separation of the reaction mixture into a reduced asphalt content phase and an asphalt phase, wherein the oxidized heteroatom-containing hydrocarbon molecules are in the asphalt phase; discharging the asphalt phase containing oxidized heteroatom-containing hydrocarbon molecules; and recovering the reduced asphalt content phase having a reduced content of heteroatom-containing hydrocarbon molecules. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification