Caustic scrubbing solution for removal of hydrogen sulfide, acid gas, and carbon dioxide from natural gas and methods for same
AssigneeRipcord Energy Solutions, LLC
InventorsLinda Esther Schweitzer, Bobby Burkes, SR.
Life of this patent
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Abstract
Methods of treating natural gas or biogas include providing a caustic treatment composition comprising: a strong base; 0.005 to 0.025% wt/wt polyethylene or polypropylene glycol; and 0.005 to 0.02% wt/wt ethylenediaminetetraacetic acid or ethylenediamine; and a balance water, introducing a natural gas or a biogas and the caustic treatment composition into a caustic scrubber; and operating the caustic scrubber to remove hydrogen sulfide and one or more of an acid gas and carbon dioxide.
Claims17
A method of treating natural gas or biogas, the method comprising:
- providing a natural gas or biogas in need of a reduced content of sulfur containing compounds;
- providing a caustic treatment composition comprising:
- (a) a strong base;
- (b) 0.005 to 0.025% wt/wt polyethylene or polypropylene glycol;
- and
- (c) 0.005 to 0.02% wt/wt ethylenediaminetetraacetic acid or ethylenediamine;
- and
- (d) balance water;
- wherein the caustic treatment composition has a pH greater than 12;
- introducing the natural gas or biogas and the caustic treatment composition into a caustic scrubber;
- and
- operating the caustic scrubber to remove hydrogen sulfide and one or more of an acid gas and carbon dioxide.
A treatment composition for natural gas or biogas comprising:
- (a) a strong base;
- (b) 0.005 to 0.025% wt/wt polyethylene or polypropylene glycol;
- and
- (c) 0.005 to 0.02% wt/wt ethylenediaminetetraacetic acid or ethylenediamine;
- and
- (d) balance water;
- wherein the caustic treatment composition has a pH greater than 12.
A treatment composition for natural gas or biogas comprising:
- (a) about 25% to about 33% of a strong base;
- (b) less than 0.1% wt/wt chelating agent;
- and
- (d) balance water.
Dependencies are inferred from the claim text.