US2008000809A1PendingUtilityA1

Membrane method of removing oil-soluble metals from hydrocarbons

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Assignee: WANG HUAPriority: Jun 30, 2006Filed: Jun 30, 2006Published: Jan 3, 2008
Est. expiryJun 30, 2026(expired)· nominal 20-yr term from priority
Inventors:Hua WangGary William YeagerJoseph Anthony SurianoNeil Edwin Moe
C10G 31/11B01D 61/025B01D 61/145B01D 61/027B01D 61/147B01D 61/58
42
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Claims

Abstract

A method of removing an oil-soluble metal from a hydrocarbon feedstock comprises passing the hydrocarbon feedstock through a nanofiltration membrane or a reverse osmosis membrane to produce a permeate stream having at least a vanadium concentration less than an initial vanadium concentration in the hydrocarbon feedstock, and a retentate stream having at least a vanadium concentration greater than the initial vanadium concentration in the hydrocarbon feedstock.

Claims

exact text as granted — not AI-modified
1 . A method of removing an oil-soluble metal from a hydrocarbon feedstock, the method comprising:
 passing the hydrocarbon feedstock through a nanofiltration membrane or a reverse osmosis membrane to produce a permeate stream having at least a vanadium concentration less than an initial vanadium concentration in the hydrocarbon feedstock, and a retentate stream having at least a vanadium concentration greater than the initial vanadium concentration in the hydrocarbon feedstock.   
     
     
         2 . The method of  claim 1 , further comprising passing the hydrocarbon feedstock through a microfilter prior to passing the hydrocarbon feedstock through the nanofiltration membrane or the reverse osmosis membrane. 
     
     
         3 . The method of  claim 2 , further comprising removing particulates having a particle size greater than 0.03 from the hydrocarbon feedstock using the microfilter. 
     
     
         4 . The method of  claim 1 , wherein the vanadium concentration in the permeate is less than or equal to about 0.2 ppm. 
     
     
         5 . The method of  claim 1 , further comprising passing the hydrocarbon feedstock through an ultrafiltration membrane prior to passing the hydrocarbon feedstock through the nanofiltration membrane or the reverse osmosis membrane, wherein the ultrafiltration membrane removes at least asphaltenes from the hydrocarbon feedstock and the nanofiltration membrane or the reverse osmosis membrane removes at least porphyrins from the hydrocarbon feedstock. 
     
     
         6 . The method of  claim 1 , wherein the nanofiltration membrane or the reverse osmosis membrane comprises a polymer. 
     
     
         7 . The method of  claim 6 , wherein the polymer is selected from the group consisting of poly(acrylic acids), poly(acrylates), polyacetylenes, poly(vinyl acetates), polyacrylonitriles, polyamines, polyamides, polysulfonamides, polyethers, polyurethanes, polyimides, polyvinyl alcohols, polyesters, cellulose, cellulose esters, cellulose ethers, chitosan, chitin, elastomeric polymers, halogenated polymers, fluoroelastomers, polyvinyl halides, polyphosphazenes, polybenzimidazoles, poly(trimethylsilylpropyne), polysiloxanes, poly(dimethyl siloxanes), and copolymers blends thereof. 
     
     
         8 . The method of  claim 1 , further comprising diluting the hydrocarbon feedstock with a solvent to reduce viscosity of the hydrocarbon feedstock. 
     
     
         9 . The method of  claim 1 , further comprising adding a vanadium porphyrin binding absorbent to the hydrocarbon feedstock. 
     
     
         10 . A method of removing an oil-soluble metal from a hydrocarbon feedstock, the method comprising:
 passing the hydrocarbon feedstock through a microfilter to produce a pre-filtered stream;   passing the pre-filtered stream through an ultrafiltration membrane to produce an ultrafiltration stream;   passing the ultrafiltration stream through a nanofiltration membrane or a reverse osmosis membrane to produce a permeate stream having at least a vanadium concentration less than an initial vanadium concentration in the hydrocarbon feedstock, and a retentate stream having at least a vanadium concentration greater than the initial vanadium concentration in the hydrocarbon feedstock.   
     
     
         11 . The method of  claim 10 , wherein the ultrafiltration membrane removes at least asphaltenes from the pre-filtered stream. 
     
     
         12 . The method of  claim 10 , wherein the nanofiltration membrane or the reverse osmosis membrane removes at least porphyrins from the ultrafiltration stream. 
     
     
         13 . The method of  claim 10 , further comprising removing particulates having a particle size greater than 0.03 from the hydrocarbon feedstock using the microfilter. 
     
     
         14 . The method of  claim 10 , wherein the vanadium concentration in the permeate is less than or equal to about 0.2 ppm. 
     
     
         15 . The method of  claim 10 , wherein the nanofiltration membrane or the reverse osmosis membrane comprises a polymer. 
     
     
         16 . The method of  claim 15 , wherein the polymer is selected from the group consisting of poly(acrylic acids), poly(acrylates), polyacetylenes, poly(vinyl acetates), polyacrylonitriles, polyamines, polyamides, polysulfonamides, polyethers, polyurethanes, polyimides, polyvinyl alcohols, polyesters, cellulose, cellulose esters, cellulose ethers, chitosan, chitin, elastomeric polymers, halogenated polymers, fluoroelastomers, polyvinyl halides, polyphosphazenes, polybenzimidazoles, poly(trimethylsilylpropyne), polysiloxanes, poly(dimethyl siloxanes), and copolymers blends thereof. 
     
     
         17 . The method of  claim 10 , further comprising diluting the hydrocarbon feedstock with a solvent to reduce viscosity of the hydrocarbon feedstock. 
     
     
         18 . The method of  claim 10 , further comprising adding a vanadium porphyrin binding absorbent to the hydrocarbon feedstock. 
     
     
         19 . The method of  claim 10 , further comprising adding a vanadium porphyrin binding absorbent to the hydrocarbon feedstock prior to passing the hydrocarbon feedstock through the microfilter. 
     
     
         20 . The method of  claim 10 , wherein the nanofiltration membrane or the reverse osmosis membrane comprises a catalyst.

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