Formulations and methods to remove non-acidic sulfur compounds from gas streams
AssigneeBaker Hughes Oilfield Operations LLC
InventorsOnome Ugono, Sankaran Murugesan, Sai Reddy Pinappu, Jeffery Bolton
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Abstract
Non-acidic sulfur compounds can be extracted from a gas stream by contacting the gas stream with a carbonate solvent that contains at least one organic carbonate in an amount that is effective to solvate at least a portion of the non-acidic sulfur compounds. The gas steam can then be separated from the carbonate solvent that contains the non-acidic sulfur compounds. The carbonate solvent may optionally include a co-solvent and/or a mercaptan scavenger.
Claims20
A carbonate solvent for removing non-acidic sulfur compounds from a gas stream, the carbonate solvent comprising:
- at least one organic carbonate;
- and
- a co-solvent selected from the group consisting of caprolactam, valerolactam, azetidinone, aza-2-cyclooctanone, aminododecanolactam, and combinations thereof.
The carbonate solvent of claim 5, wherein the mercaptan scavenger is N-methyl-2-pyrrolidinone.
A method for extracting non-acidic sulfur compounds from a gas stream, the method comprising the steps of:
- obtaining a carbonate solvent, where the carbonate solvent comprises at least one organic carbonate;
- contacting the gas stream with an amount of the carbonate solvent that is effective to solvate at least a portion of the non-acidic sulfur compounds from the gas stream;
- and
- separating the gas stream from the carbonate solvent containing the non-acidic sulfur compounds.
A method for extracting non-acidic sulfur compounds from a gas stream, the method comprising the steps of:
- obtaining a carbonate solvent comprising at least one organic carbonate;
- bubbling the gas stream through an amount of the carbonate solvent that is effective to solvate at least a portion of the non-acidic sulfur compounds from the gas stream, wherein the non-acidic sulfur compounds comprise dimethyl sulfide;
- and
- separating the gas stream from the carbonate solvent containing the non-acidic sulfur compounds.
Dependencies are inferred from the claim text.