| abstract |
The use of the combination of (a) an imine compound and (b) a compound including a soft electrophilic centre to scavenge and retain acidic sulfide species such as hydrogen sulfide at a higher temperature and/or scavenge acidic sulfide species at an increased rate compared to that achieved using the imine compound alone. The soft electrophile may be propenal (acrolein), maleimide, N-butyl maleimide, bis(chloromethyl)dimethyl silane, 2-iodo-1,1,1,2,3,3,3-heptafluoropropane, maleic anhydride or 2-vinyl-1,3-dioxolane. Also disclosed is the use of as reaction product of an imine compound and a compound including a soft electrophilic centre as a hydrogen sulphide scavenger. The acid sulfide species may be scavenged from an the industrial or environmental material such as crude oil, produced water, petroleum refinery liquids, coke, asphalt or bitumen, used fracturing fluids, used water-flooding fluids, brines, geothermal fluids or sour gas. |