Process for producing deasphalted and demetallized oil
AssigneeSaudi Arabian Oil Company
InventorOmer Refa Koseoglu
Life of this patent
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Abstract
A process and system for producing deasphalting and demetallized oil from an initial feed such as a heavy feed is provided. The feed is contacted with an effective quantity of solvent to promote phase separation, to produce an asphalt phase and a reduced asphalt content phase. The reduced asphalt content phase is contacted with an effective amount of solid adsorbent to remove undesirable metal compounds to produce an oil phase substantially-free of asphalt and substantially-free of metal. The oil phase that is substantially-free of asphalt and substantially-free of metal is subjected to flash separation to produce a solvent fraction for recycle and an oil phase effluent substantially-free of asphalt and substantially-free of metal for recovery as the desired product.
Claims20
A process to treat a heavy feedstock to reduce the content of undesired metal components comprising:
- a. mixing the feedstock with an effective quantity of paraffinic solvent;
- b. separating asphaltic content;
- c. recovering a mixture of deasphalted oil and paraffinic solvent;
- d. contacting the mixture of deasphalted oil and paraffinic solvent in an adsorptive demetallizing zone selected from the group consisting of a fixed bed and a fluidized bed, the adsorptive demetallizing zone containing an effective quantity of solid adsorbent, the contacting occurring under conditions and for a time sufficient for adsorption of the undesired metal components;
- and
- e. recovering a mixture of deeply demetallized oil and paraffinic solvent.
A solvent deasphalting process for upgrading a heavy feedstock containing undesirable metal components comprising:
- contacting the heavy feedstock with an effective quantity of solvent to promote phase separation, to produce an asphalt phase and a reduced asphalt content phase;
- contacting the reduced asphalt content phase in an adsorptive demetallizing zone selected from the group consisting of a fixed bed and a fluidized bed, the adsorptive demetallizing zone containing an effective quantity of solid adsorbent, the contacting occurring under conditions and for a time sufficient to adsorb undesirable metal components to produce an oil phase substantially-free of asphalt and substantially-free of metal;
- subjecting the asphalt phase to flash separation to produce an asphalt effluent and solvent phase;
- recovering the asphalt effluent;
- recycling the solvent phase;
- subjecting the oil phase substantially-free of asphalt and substantially-free of metal to flash separation to produce a solvent fraction and an oil phase effluent substantially-free of asphalt and substantially-free of metal;
- recycling the solvent fraction;
- and
- recovering the oil phase effluent substantially free of asphalt and substantially free of metal.
A solvent deasphalting system for upgrading a heavy feedstock containing undesirable metal components comprising:
- a phase separation zone having one or more inlets in fluid communication with a source of the heavy feedstock and with a source of solvent to promote phase separation, one or more outlets for discharging an asphalt phase containing asphalt and solvent, and one or more outlets for discharging a deasphalted oil phase containing deasphalted oil and solvent;
- an adsorptive demetallizing zone selected from the group consisting of a fixed bed and a fluidized bed, the adsorptive demetallizing zone containing an effective amount of solid adsorbent, including one or more inlets in fluid communication with the outlet of phase separation zone discharging the deasphalted oil phase, and one or more outlets for discharging a stream of demetallized/deasphalted oil and solvent, wherein the deasphalted oil phase contacts the solid adsorbent under conditions and for a time sufficient for adsorption of the undesired metal components;
- and
- a demetallized/deasphalted oil and solvent separation zone having one or more inlets in fluid communication with the outlet of the adsorptive demetallizing zone for discharging the stream of demetallized/deasphalted oil and solvent, one or more outlets for discharging demetallized/deasphalted oil, and one or more outlets for discharging solvent.
Dependencies are inferred from the claim text.