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US 10,493,400 B2Granted
Process for dehumidifying moist gas mixtures
AssigneeEvonik Degussa GmbH
InventorsMuhammad Irfan, Jörn Rolker, Rolf Schneider
Life of this patent
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Abstract
The invention relates to a process for dehumidifying a moist gas mixture and to the absorption medium used in the process. The invention further relates to an apparatus for dehumidifying a moist gas mixture and to the use of said apparatus in the process according to the invention.
Claims7
A process for dehumidifing a moist gas mixture G1, wherein the moist gas mixture G1 comprises CO2, said process comprising:
- contacting the moist gas mixture G1 with a liquid absorption medium A1, wherein A1 comprises a mixture of triethylene glycol and at least one salt S selected from the group consisting of:
- Q+A−;
- to obtain a gas mixture G2, which has a lower water content compared to moist gas mixture G1, and a liquid absorption medium A2, which has an elevated water content compared to the liquid absorption medium A1;, wherein:
- a) Q+ is selected from the group consisting of 1,3-dimethylimidazolium cation, 1,3-diethylimidazolium cation, and 1-ethyl-3-methylimidazolium cation;
- and
- b) A− is an anion selected from the group consisting of acetate and propionate.
3 more elements
An absorption medium consisting of a mixture of triethylene glycol and at least one salt S selected from the group consisting of:
- Q+A−, wherein:
- a) Q+ is selected from the group consisting of 1,3-dimethylimidazolium cation, 1,3-diethylimidazolium cation, and 1-ethyl-3-methylimidazolium cation;
- and
- b) A− is an anion selected from the group consisting of acetate and propionate.
1 more element
Dependencies are inferred from the claim text.