The present invention relates to a method for producing a hydrocarbon, including a step (Y) of converting a reaction product of at least one sulfur compound selected from the group consisting of hydrogen sulfide and a compound containing a —SH group which are contained in a hydrocarbon with an α,β-unsaturated aldehyde compound into a water-soluble compound in the presence of water, and a step (Z) of separating oil and water.

A method of scavenging acid sulfide species from an industrial or environmental material, the method comprising contacting the material with: (a) propenal and/or maleimide and/or ethyl-2-chloroacetoacetate; and (b) a base.

A method of scavenging acid sulfide species from an industrial or environmental material, the method comprising contacting the material with: (a) propenal and/or maleimide and/or ethyl-2-chloroacetoacetate; and (b) a base.

Provided is a composition for removing a sulfur-containing compound contained in at least one of a liquid and gas, the sulfur-containing compound being at least one selected from the group consisting of hydrogen sulfide and an SH group-containing compound, the composition containing an aldehyde and an amine whose conjugate acid has a pKa value of 11.3 or higher in water at 25 C.

Provided is a composition for removing a sulfur-containing compound contained in at least one of a liquid and gas, the sulfur-containing compound being at least one selected from the group consisting of hydrogen sulfide and an SH group-containing compound, the composition containing an aldehyde and an amine whose conjugate acid has a pKa value of 11.3 or higher in water at 25 C.

A method for removing sulphur compounds from a process stream by contacting the process stream with an aqueous solution containing glycolaldehyde as the predominant compound.

A method for removing sulphur compounds from a process stream by contacting the process stream with an aqueous solution containing glycolaldehyde as the predominant compound.

A method for scavenging hydrogen sulfides from hydrocarbon or aqueous streams and/or reducing or inhibiting solids or scale formation comprising introducing an additive made up of architectured materials such as star polymers, hyperbranched polymers, and dendrimers that may be used alone or in conjunction with aldehyde-based, triazine-based and/or metal-based hydrogen sulfide scavengers to an aqueous or hydrocarbon stream. A treated fluid comprising a fluid containing hydrogen sulfide and an additive for scavenging hydrogen sulfide or reducing or inhibiting solids and scale formation made up of architectured materials such as star polymers, hyperbranched polymers, and dendrimers. The fluid may further include aldehyde-based, triazine-based and/or metal-based hydrogen sulfide scavengers.

A method for scavenging hydrogen sulfides from hydrocarbon or aqueous streams and/or reducing or inhibiting solids or scale formation comprising introducing an additive made up of architectured materials such as star polymers, hyperbranched polymers, and dendrimers that may be used alone or in conjunction with aldehyde-based, triazine-based and/or metal-based hydrogen sulfide scavengers to an aqueous or hydrocarbon stream. A treated fluid comprising a fluid containing hydrogen sulfide and an additive for scavenging hydrogen sulfide or reducing or inhibiting solids and scale formation made up of architectured materials such as star polymers, hyperbranched polymers, and dendrimers. The fluid may further include aldehyde-based, triazine-based and/or metal-based hydrogen sulfide scavengers.

Methods for making sulfide scavenging compositions are provided. The method comprises reducing a settling velocity of the sulfide scavenging composition in a fluid stream by adjusting the specific gravity of the sulfide scavenging composition to within about fifteen percent or less of the specific gravity of the fluid stream. Sulfide scavengers using the above method are also disclosed. Methods for removing sulfides from fluid streams are also provided. The methods include adding the above sulfide scavengers to fluid streams.