METHOD OF CLEANING GAS FLOWS FROM CARBON DIOXIDE Russian patent published in 2016 - IPC B01D53/00 

FIELD: gas chemistry.

SUBSTANCE: this invention relates to chemistry and concerns purification of gas flows from acid impurities in particular from carbon dioxide. Invention relates to a method of purifying gas flow containing carbon dioxide. Disclosed method involves bringing the gas flow containing carbon dioxide in contact with absorbent flow containing at least one salt of, at least one alkaline metal or hydroxide, at least one alkali metal and at least one polyamine, as well as at least one alkanolamine, besides, polyamine contained in the absorbent, has a boiling point of not less than 100 °C below than the boiling point of the alkanolamine. This method also includes regeneration of used absorbent and periodic supply of specified polyamine to absorbent.

EFFECT: technical result consists in a stable reduction of CO₂ content in cleaned gas flow, as well as preservation of quality characteristics of absorbent during its long-term industrial use.

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