FIELD: chemistry.
SUBSTANCE: method of selective separating of hydrogen sulphide from gas mixtures, containing carbon dioxide involves contacting of gas mixture with compound of formula: 
, where R3 is C1-C4 alkyl group, each R1 and R2 is C1-C4 alkyl group, R4 is OH or OR5, R5 is -CH2-CR1R2-NHR3 and n is an integer from 1 to 4. The gas mixture is contacted with aqueous solution compound or with non-aqueous solution compound, or with solid body to which a compound is grafted, or which has been saturated by the given compound. A preferred compound is 2-(N-methylamino)-2-methylpropan-1-ol.
EFFECT: increase the rate of compound reaction of given formula with hydrogen sulfide and more selective separation of hydrogen sulfide from carbon dioxide in acidic gas mixtures.
14 cl, 7 dwg, 3 ex
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