Gas purification apparatus and method
US-11931687-B2 · Mar 19, 2024 · US
Blends of amines with piperazine for CO2 capture
US9321007B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9321007-B2 |
| Application number | US-201414335138-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 18, 2014 |
| Priority date | Jan 20, 2012 |
| Publication date | Apr 26, 2016 |
| Grant date | Apr 26, 2016 |
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- Title
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Abstract
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Compositions and methods related to the removal of acidic gas. In particular, the present disclosure relates to a composition and method for the removal of acidic gas from a gas mixture using a solvent comprising a blend of piperazine and at least one diamine or triamine.
First claim
Opening claim text (preview).
What is claimed is: 1. A method comprising contacting an acidic gas with an aqueous amine solvent, wherein the aqueous amine solvent comprises piperazine and a linear diamine, wherein the linear diamine is 3-oxapentane-1,5-diamine, and wherein the 3-oxapentane-1,5-diamine is present in the aqueous amine solvent at a concentration in the range of from about 4 to about 12 equivalents/kg water. 2. The method of claim 1 wherein 50 mol % or less of the amine in the solvent is the linear diamine. 3. The method of claim 1 further comprising flowing the solvent to a stripper operating at a temperature in the range of from about 120° C. to about 165° C. 4. A method comprising contacting an acidic gas with a blend comprising piperazine, diaminoethylpiperazine and aminoethylpiperazine. 5. The method of claim 4 wherein the amine concentration of the blend is in the range of from about 8 to about 24 equivalents/kg water and wherein 50 mol % or less of the amine in the blend is aminoethylpiperazine. 6. The method of claim 4 further comprising flowing the blend to a stripper operating at a temperature in the range of from about 120° C. to about 165° C. 7. The method of claim 6 wherein the blend composition has reached equilibrium at the operating temperature of the stripper.
Assignees
Inventors
Classifications
- B01D53/1456Primary
Removing acid components · CPC title
Secondary amines · CPC title
Organic sulfur compounds, e.g. mercaptans · CPC title
containing a piperazine-ring · CPC title
Diamines · CPC title
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Frequently asked questions
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- What does patent US9321007B2 cover?
- Compositions and methods related to the removal of acidic gas. In particular, the present disclosure relates to a composition and method for the removal of acidic gas from a gas mixture using a solvent comprising a blend of piperazine and at least one diamine or triamine.
- Who is the assignee on this patent?
- Univ Texas
- What technology area does this patent fall under?
- Primary CPC classification B01D53/1456. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 26 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).