Method of deacidizing a gas with a fractional regeneration absorbent solution
First Claim
1. A method of deacidizing a gaseous effluent comprising at least one acid compound of the group consisting of hydrogen sulfide (H2S), mercaptans, carbon dioxide (CO2), sulfur dioxide (SO2), carbon oxysulfide (COS) and carbon disulfide (CS2), wherein the following stages are carried out:
- a) contacting the gaseous effluent with an absorbent solution so as to obtain a gaseous effluent depleted in acid compounds and an absorbent solution laden with acid compounds, the absorbent solution being selected for its property to form two separable phases when it absorbs an amount of acid compounds,b) separating the absorbent solution laden with acid compounds into two fractions;
a first absorbent solution fraction depleted in acid compounds and a second absorbent solution fraction enriched in acid compounds,c) regenerating the second fraction so as to release part of the acid compounds,d) recycling the first absorbent solution fraction obtained in stage b) and the regenerated absorbent solution obtained in stage c) as the absorbent solution to stage a).
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Abstract
The gaseous effluent flowing in through line 1 is contacted in absorption zone ZA with the liquid absorbent solution flowing in through line 9. The gaseous effluent depleted in acid compounds is discharged through line 2. The absorbent solution laden with acid compounds is discharged through line 3. The absorbent solution once laden with acid compounds comprises two phases: a first phase poor in acid compounds and a second phase rich in acid compounds. The two phases are separated in zone ZS. The first phase is recycled through lines 5 and 9 to absorption zone ZA. The second phase is fed through line 4 into regeneration zone ZR. In zone ZR, the acid compounds are separated from the absorbent solution. The acid compounds are discharged through line 7. The regenerated absorbent solution is recycled through lines 6 and 9 to zone ZA.
49 Citations
14 Claims
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1. A method of deacidizing a gaseous effluent comprising at least one acid compound of the group consisting of hydrogen sulfide (H2S), mercaptans, carbon dioxide (CO2), sulfur dioxide (SO2), carbon oxysulfide (COS) and carbon disulfide (CS2), wherein the following stages are carried out:
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a) contacting the gaseous effluent with an absorbent solution so as to obtain a gaseous effluent depleted in acid compounds and an absorbent solution laden with acid compounds, the absorbent solution being selected for its property to form two separable phases when it absorbs an amount of acid compounds, b) separating the absorbent solution laden with acid compounds into two fractions;
a first absorbent solution fraction depleted in acid compounds and a second absorbent solution fraction enriched in acid compounds,c) regenerating the second fraction so as to release part of the acid compounds, d) recycling the first absorbent solution fraction obtained in stage b) and the regenerated absorbent solution obtained in stage c) as the absorbent solution to stage a). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of deacidizing a gaseous effluent comprising at least one acid compound of the group consisting of hydrogen sulfide (H2S), mercaptans, carbon dioxide (CO2), sulfur dioxide (SO2), carbon oxysulfide (COS) and carbon disulfide (CS2), wherein the following stages are carried out:
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a) contacting the gaseous effluent with an absorbent solution so as to obtain a gaseous effluent depleted in acid compounds and an absorbent solution laden with acid compounds, the absorbent solution being selected for its property to form two separable phases when it absorbs an amount of acid compounds, b) separating the absorbent solution laden with acid compounds into two fractions;
a first absorbent solution fraction depleted in acid compounds and a second absorbent solution fraction enriched in acid compounds,c) regenerating the second fraction so as to release part of the acid compounds, d) recycling the first absorbent solution fraction obtained in stage b) and the regenerated absorbent solution obtained in stage c) as absorbent solution to stage a). - View Dependent Claims (13, 14)
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Specification