HYDROGEN SULFIDE NEUTRALIZER AND A PROCESS FOR USING THE SAME Russian patent published in 2008 - IPC C10G27/06 E21B43/22 C02F1/66 

FIELD: petroleum and gas processing.

SUBSTANCE: invention relates to the area of neutralization of hydrogen sulfide in oil-field media by neutralizing reagents and can be used to neutralize hydrogen sulfide in crude oil, water-oil emulsion, associated oil and natural gas (in produce of oil and gas wells), formation and waste waters, water-based process fluids (well killing fluids, displacement fluids, washing fluid, etc.). Hydrogen sulfide neutralizer is 3-36% aqueous solution of alkali metal pyrosulfite, in particular sodium pyrosulfite. To reduce corrosive activity of neutralizer and also to reduce contamination of purified crude material with thus formed elementary sulfur, neutralizer is supplemented by 1-15% of alkali and/or nitrogen-containing reagent, in particular sodium hydroxide, carbonate, phosphate, and/or sulfite as alkali reagent and aqueous ammonia and/or water-soluble organic amine as nitrogen-containing reagent. A process of purification of oil-field media using above-defined neutralizer is also described.

EFFECT: enhanced hydrogen sulfide neutralization efficiency and enlarged assortment of accessible, nontoxic, stable, and effective neutralizers.

6 cl, 16 ex