AQUEOUS ALKANOLAMINE ABSORBING COMPOSITION CONTAINING PYPERAZIN FOR IMPROVED REMOVAL OF HYDROGEN SULPHIDE FROM GASEOUS MIXTURES, AND METHOD OF ITS USE Russian patent published in 2018 - IPC B01D53/14 B01D53/52 C07C7/11 C10G21/20 C10L3/10 

FIELD: chemistry.

SUBSTANCE: aqueous solution of alkanolamine to remove acid gases, including hydrogen sulfide from gaseous mixtures containing hydrogen sulfide, includes: (i) from 20 up to 50 weight percentage of 3-(dimethylamine)-1,2-propane diol or 3-(diethylamine)-1,2-propane diol, and (ii) from 2 to 10 weight percentage of piperazine. Weight percentage is taken based on the total weight of the aqueous solution of alkanolamine and wherein the said aqueous solution of alkanolamine does not contain orthophosphoric acid, phosphoric acid, hydrochloric acid, sulfuric acid, sulfurous acid, nitric acid, pyrophosphoric acid, tellurium acid, acetic acid, formic acid, adipic acid, benzoic acid, n-butane acid, monochloroacetic acid, citric acid, glutaric acid, lactic acid, malonic acid, oxalic acid, o-phthalic acid, succinic acid, o-toluic acid. A method for removing acid gases from a gas mixture is also disclosed.

EFFECT: claimed aqueous amine solution provides removal of hydrogen sulfide and carbon dioxide at a lower consumption of the absorbent.

6 cl, 1 tbl, 2 dwg