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.
Claims18
A carbonate solvent for removing non-acidic sulfur compounds from a gas stream, the carbonate solvent comprising:
- at least one organic carbonate;
- a mercaptan scavenger, wherein the mercaptan scavenger is an oxazolidine;
- and
- a co-solvent selected from the group consisting of caprolactam, valerolactam, azetidinone, aza-2-cyclooctanone, aminododecanolactam, and combinations thereof.
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;
- separating the gas stream from the carbonate solvent containing the non-acidic sulfur compounds;
- removing the at least a portion of the non-acidic sulfur compounds from the carbonate solvent to obtain a regenerated carbonate solvent;
- and
- treating a subsequent volume of gas stream having non-acidic sulfur compounds with the regenerated carbonate solvent.
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 a first amount of the carbonate solvent that is effective to solvate at least a first portion of the non-acidic sulfur compounds from the gas stream, wherein the non-acidic sulfur compounds comprise dimethyl sulfide;
- bubbling the gas stream through a second amount of the carbonate solvent that is effective to solvate a second portion of the non-acidic sulfur compounds from the gas stream;
- separating the gas stream from the carbonate solvent containing the non-acidic sulfur compounds;
- and
- removing the first portion and the second portion of the non-acidic sulfur compounds from the carbonate solvent.
Dependencies are inferred from the claim text.