Application of formaldehyde sulfoxylates for scavenging H2S
AssigneeBaker Hughes Holdings LLC
InventorsScott E. Lehrer, Soma Chakraborty, Sunder Ramachandran, Kimchi T. Phan
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Abstract
A scavenger comprising a formaldehyde sulfoxylate may be used to scavenge hydrogen sulfide (H2S) from systems that are brine or mixed production. Suitable formaldehyde sulfoxylates include, but are not necessarily limited to, sodium formaldehyde sulfoxylate, zinc formaldehyde sulfoxylate, and calcium formaldehyde sulfoxylate, potassium formaldehyde sulfoxylate, magnesium formaldehyde sulfoxylate, iron formaldehyde sulfoxylate, copper formaldehyde sulfoxylate, alkene aldehyde sulfoxylates, and combinations thereof.
Claims14
A system treated for hydrogen sulfide (H2S) where:
- the system is selected from the group comprising mixed production and water, which system comprises H2S;
- and
- the system comprises a scavenger consisting of water as a solvent and a formaldehyde sulfoxylate in an effective amount to at least partially scavenge H2S from the system.
A system treated for hydrogen sulfide (H2S) where:
- the system is selected from the group comprising mixed production and water, which system comprises H2S;
- and
- the system comprises a scavenger consisting of water as a solvent and a formaldehyde sulfoxylate in an amount ranging from about 2.5 kg/kg H2S to about 20 kg/kg H2S in the system to at least partially scavenge H2S from the system, where the formaldehyde sulfoxylate is selected from the group consisting of sodium formaldehyde sulfoxylate, zinc formaldehyde sulfoxylate, calcium formaldehyde sulfoxylate, potassium formaldehyde sulfoxylate, magnesium formaldehyde sulfoxylate, iron formaldehyde sulfoxylate, copper formaldehyde sulfoxylate, alkene aldehyde sulfoxylates, and combinations thereof.
A system treated for hydrogen sulfide (H2S) where:
- the system is mixed production, which system consists of H2S, oil, a hydrocarbon gas and at least 50 wt % water, and the system is at a temperature range between about 0° C. to about 149° C.;
- and
- the system comprises a scavenger consisting of water as a solvent and a formaldehyde sulfoxylate in an effective amount to at least partially scavenge H2S from the system.
Dependencies are inferred from the claim text.