Abstract: A combination of at least one basic compound, such as potassium hydroxide, together with at least one aldehyde donor can synergistically scavenge mercaptans from organic fluids, such as hydrocarbons, where “synergistically effective” is defined as the amount of mercaptans scavenged is greater as compared with a combination where either the basic compound or the reaction product is absent, used in the same total amount.

Abstract: A combination of at least one basic compound, such as potassium hydroxide, together with at least one aldehyde donor can synergistically scavenge mercaptans from organic fluids, such as hydrocarbons, where “synergistically effective” is defined as the amount of mercaptans scavenged is greater as compared with a combination where either the basic compound or the reaction product is absent, used in the same total amount.

Abstract: Metals, such as mercury, may be removed from aqueous, hydrocarbon, or mixed oilfield or refinery fluids by: applying a sulfur compound having the general formula HS—X, where X is a heteroatom substituted alkyl, cycloalkyl, aryl, and/or alkylaryl group either alone or in combination with or as a blend with at least one demulsifier, a buffering agent, a pour point depressant, and/or a water clarifier to chelate the at least one metal and form a chelate complex of the sulfur compound with the at least one metal and then separating the chelate complex from the fluid.

Abstract: Metals, such as mercury, may be removed from glycol fluids by applying a sulfur compound having the general formula HS—X, wherein X is a heteroatom-substituted alkyl, cycloalkyl, aryl, and/or alkylaryl group either alone or in combination with or as a blend with at least one antifoam additive, at least one demulsifier and/or a buffering agent, to chelate the at least one metal and form a chelate complex of the sulfur compound with the at least one metal and then separating the chelate complex from the fluid.

Abstract: Metals, such as mercury, may be removed from aqueous, hydrocarbon, or mixed oilfield or refinery fluids by: applying a sulfur compound having the general formula HS—X, where X is a heteroatom substituted alkyl, cycloalkyl, aryl, and/or alkylaryl group either alone or in combination with or as a blend with at least one demulsifier, a buffering agent, a pour point depressant, and/or a water clarifier to chelate the at least one metal and form a chelate complex of the sulfur compound with the at least one metal and then separating the chelate complex from the fluid.

Abstract: Metals, such as mercury, may be removed from aqueous, hydrocarbon, or mixed oilfield or refinery fluids by: applying a sulfur compound having the general formula HS-X, wherein X is a heteroatom substituted alkyl, cycloalkyl, aryl, and/or alkylaryl group either alone or in combination with or as a blend with at least one demulsifier, a buffering agent, a pour point depressant, and/or a water clarifier to chelate the at least one metal and form a chelate complex of the sulfur compound with the at least one metal and then separating the chelate complex from the fluid.

Abstract: Metals, such as mercury, may be removed from glycol fluids by applying a sulfur compound having the general formula HS—X, wherein X is a heteroatom-substituted alkyl, cycloalkyl, aryl, and/or alkylaryl group either alone or in combination with or as a blend with at least one antifoam additive, at least one demulsifier and/or a buffering agent, to chelate the at least one metal and form a chelate complex of the sulfur compound with the at least one metal and then separating the chelate complex from the fluid.

Abstract: Metals, such as mercury, may be removed from aqueous, hydrocarbon, or mixed oilfield or refinery fluids by: applying a sulfur compound having the general formula HS-X, wherein X is a heteroatom substituted alkyl, cycloalkyl, aryl, and/or alkylaryl group either alone or in combination with or as a blend with at least one demulsifier, a buffering agent, a pour point depressant, and/or a water clarifier to chelate the at least one metal and form a chelate complex of the sulfur compound with the at least one metal and then separating the chelate complex from the fluid.

Abstract: An additive comprising tris (2-carboxyethyl) phosphine (“TCEP”) and/or tris (3-hyroxypropyl) phosphine (“THPP”) may be added to an aqueous system in an effective amount to inhibit corrosion of the metallurgy within the aqueous system, wherein the additive may be in the form of a solution and maintains its stability and effectiveness in inhibiting corrosion in a wide range of temperature, pressure, and pH conditions of the aqueous system.

Abstract: This disclosure provides a method for scavenging hydrogen sulfide (H2S) from a fluid containing H2S and metal ions by introducing into the fluid at least one metal chelant in an amount effective to chelate metal ions in the fluid to form at least one metal-chelate complex; and removing at least a portion of the H2S from the fluid with an effective amount of the at least one metal-chelate complex. The method may further comprise the step of introducing at least one enzyme having an ability to scavenge H2S into the fluid in an amount effective to scavenge H2S from the fluid, where the amount of the at least one metal-chelate complex is effective to influence the ability of the at least one enzyme to scavenge H2S.