METHOD OF RECYCLING HYDROGEN SULPHIDE CONTAINED IN GASES Russian patent published in 2012 - IPC C01B17/05 B01D53/14 

FIELD: chemistry.

SUBSTANCE: invention relates to chemistry and can be used to recycle hydrogen sulphide contained in form of a gas impurity. Hydrogen sulphide contained in gases is dissolved in aqueous solution to form disulphide ions. The obtained solution is irradiated with constant or pulsed UV radiation with wavelength 230-290 nm. Hydrogen sulphide is dissolved in the irradiated solution to form sulphur while stirring. The obtained sulphur is removed from the solution and the cycle is repeated, starting with irradiation of the solution. The cleaned gas is removed. The solution of disulphide ions is obtained by passing the initial gas through aqueous solution of an amine and a physical absorbent of hydrogen sulphide in which amine content ranges from 0.007 to 0.05 mol/l. Concentration of the physical absorbent in the solution exceeds amine concentration by 5-30 times.

EFFECT: achieving high efficiency of the process.

1 dwg, 5 ex