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US 8,053,621 B2Granted
Solvent treatment methods and polymerization processes employing the treatment methods
AssigneeBridgestone Corporation
InventorsJames H. Pawlow, William L. Hergenrother
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Abstract
A method for treating a hydrocarbon solvent, the method comprising continuously introducing a hydrocarbon solvent to a liquid medium containing hydrogen ions; allowing the hydrocarbon solvent to be in contact with the liquid medium for at least 1 minute; continuously removing hydrocarbon solvent from the liquid medium to provide a treated hydrocarbon solvent stream.
Claims18
A method for treating a hydrocarbon solvent, the method comprising:
- continuously introducing a hydrocarbon solvent to a medium including sulfated zirconia, tungstenated zirconia, or both sulfated zirconia and tungstenated zirconia, where the hydrocarbon solvent is contaminated with oxygenates;
- allowing the hydrocarbon solvent to be in contact with the medium for at least 1 minute;
- continuously removing hydrocarbon solvent from the medium to provide a treated hydrocarbon solvent stream;
- further comprising the step of employing at least a portion of the treated hydrocarbon stream as a solvent within a polymerization process;
- and
- circulating the solvent from the polymerization process back to the medium containing one or more proton donor groups.
3 more elements
A method for treating hydrocarbon solvent, the method comprising:
- contacting a hydrocarbon solvent contaminated with oxygenates with a medium including sulfated zirconia, tungstenated zirconia, or both sulfated zirconia and tungstenated zirconia and recovering a solvent having reduced oxygenate contamination.
A method for treating hydrocarbon solvent, the method comprising the steps of:
- (i) providing a hydrocarbon solvent contaminated with oxygenates;
- (ii) treating the hydrocarbon solvent by passing the solvent through a column containing alumina, silica, or both alumina and silica;
- (iii) treating the hydrocarbon solvent by passing the solvent through a column containing a solid substrate containing proton donor groups;
- and
- (iv) employing at least a portion of the treated hydrocarbon solvent within a polymerization process.
2 more elements
Dependencies are inferred from the claim text.