Method for reducing hydrogen sulfide evolution from asphalt and heavy fuel oils
AssigneeBaker Hughes Incorporated
InventorsJoseph L. Stark, Jennifer D. Draper, Paul Biggerstaff, Donald Wolfe
Life of this patent
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Abstract
Hydrogen sulfide evolution from asphalt or heavy fuel oil may be reduced or eliminated using an additive to act as a scavenger. Zinc, in conjunction with an additional metal selected from Fe, Mn, Co, Ni, Cr, Zr, when present in the form of nano-particles of an oxide, borate or carboxylate is an effective component is preventing or mitigating the evolution of hydrogen sulfide. The nano-particles may be used neat or as a dispersion. These metals may also be complexed and used in the form of a solution. Molybdenum, when used with one or both of Fe and Zn is also a useful in any of these forms for the same purpose.
Claims18
A method for reducing hydrogen sulfide emissions from heavy fuel oil or an asphalt composition comprising admixing an additive with heavy fuel oil or an asphalt composition wherein the additive comprises nano-particles of a zinc carbonate, zinc oxide, or zinc sulfide and a non-zinc metal carbonate, non-zinc metal oxide, or non-zinc metal sulfide wherein the metal is selected from the group of consisting of Fe, Mn, Co, Ni, Cr, Zr, and combinations thereof.
A method for reducing hydrogen sulfide emissions from heavy fuel oil or an asphalt composition comprising admixing an additive with heavy fuel oil or an asphalt composition wherein the additive comprises nano-particles of Mo boroacylate, Mo carboxylate, and Mo oxide, and, optionally, a member selected from the group consisting of boroacylates, carboxylates, and oxides of Fe, Zn, and combinations thereof.
A method for reducing hydrogen sulfide emissions from heavy fuel oil or an asphalt composition comprising admixing an additive with a heavy fuel oil or an asphalt composition wherein the additive comprises a solution or dispersion of zinc oxide, zinc sulfide, zinc boroacylate, or zinc carbonate and a non-zinc metal oxide, non-zinc metal sulfide, non-zinc metal boroacylate, or non-zinc metal carbonate selected from the group of consisting of an oxide, sulfide, boroacylate, or carbonate of Fe, Bi, Mn, Co, Ni, Cr, Zr, and combinations thereof.
A method for reducing hydrogen sulfide emissions from heavy fuel oil or an asphalt composition comprising admixing an additive with heavy fuel oil or an asphalt composition wherein the additive comprises a solution or dispersion of Mo boroacylates, Mo carboxylates, and Mo oxides, and, optionally, a member selected from the group consisting of boroacylates, carboxylates, and oxides of Fe, Zn, and combinations thereof.
A method for reducing hydrogen sulfide emissions from heavy fuel oil or an asphalt composition comprising admixing an additive with a heavy fuel oil or asphalt composition wherein the additive comprises a solution or dispersion of Bi boroacylates, Bi carboxylates, and Bi oxides, and, optionally, a member selected from the group consisting of boroacylates, carboxylates, and oxides of Fe, Zn, and combinations thereof.
A method for reducing hydrogen sulfide emissions from heavy fuel oil or an asphalt composition comprising admixing an additive with heavy fuel oil or an asphalt composition wherein the additive comprises nano-particles of Co boroacylate, Co carboxylate, and Co oxide, and, optionally, a member selected from the group consisting of boroacylates, carboxylates, and oxides of Fe, Zn, and combinations thereof.
Dependencies are inferred from the claim text.