Baker Hughes Corporation

Baker Hughes Holdings LLC

Kyle C Cattanach

Jerry J Weers

Sunder Ramachandran

Vladimir Jovancicevic

Philippe Prince

Jianzhong Yang

Timothy J O'Brien

Michael P Squicciarini

Paul J Biggerstaff

Ying H Tsang

Matthew T Barnes

Donald L Wolfe

Timothy J O'brien

Ross Rivers Poland

Hydrogen sulfide (HS) and/or mercaptan scavengers are chemicals that remove HS and/or mercaptans from gas, oil and water. Water-based formulations may be made and used employing scavenging compounds having the formulae: wherein each R, R, R, and Rare the same or different and are selected from the group consisting of hydrogen, an alkyl, an alkenyl, an aryl, an acyl, a halogen, a hydroxyl, a nitro, an alkyl ester, an aryl ester, an alkyl ether, an aryl ether, a hydroxymethyl, an anhydride group, an amino, and a sulfide. In one non-limiting embodiment the compounds (A) and (B) do not contain nitrogen atoms. Water-based formulations, such as those using a protic solvent with the above compounds, work well as HS scavengers.

Water-based formulation of H2S/mercaptan scavenger for fluids in oilfield and refinery applications

The use of neutral aqueous solutions of glyoxal (pH approximately 6 to 8.5) scavenges HS that is present in natural gas and in oil better than glyoxal alone or base alone. The resulting scavenger combination significantly increases the reaction rate and the overall scavenging efficiency, i.e. capacity over glyoxal used alone. A buffer may be optionally used. In another embodiment, the combination of non-nitrogen-containing surfactants and glyoxal results in a significant increase in the reaction rate and the overall scavenging efficiency, i.e. capacity as compared to glyoxal used alone.

Synergistic H2S/mercaptan scavengers using glyoxal

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Sugar Land, TX, United States of America

Kyle C Cattanach