METHOD OF SELECTIVELY REDUCING HYDROGEN SULFIDE AND/OR ORGANIC SULFIDE CONTENT IN GASEOUS AND/OR LIQUID STREAMS Russian patent published in 1997 - IPC

FIELD: gas and liquid desulfurization. SUBSTANCE: stream to be cleaned is brought in contact with interaction product of C₁-C₆-alkanolamine (in particular, monoethanolamine) and C₁-C₄-aldehyde (in particular, formaldehyde) in molar ratio 1:(0.25-10). Interaction product is selected from the group containing triazines, bis-oxazolidines and mixture thereof, in particular, N, N'-methylene-bis-oxazolidine, 1,3,5-tri[2-hydroxyethyl]hexahydro-S-triazine or mixture thereof. Alkanol-aldehyde interaction is carried out at a temperature not exceeding 93.3 C and interaction product is used at triazine to bis- oxazolidine weight ratio from 99:1 to 80:20. Contact of gaseous or liquid stream with desulfurization solution is conducted in scrubber column or solution is injected into pipeline or into wellhead. EFFECT: enhanced desulfurization process. 17 cl