Method for reducing hydrogen sulfide evolution from asphalt and heavy fuel oils

Patent metadata

Field	Value
Publication number	US-9334448-B2
Application number	US-201514681605-A
Country	US
Kind code	B2
Filing date	Apr 8, 2015
Priority date	Oct 18, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

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.

First claim

What is claimed is:

1. A method comprising:
admixing an additive with heavy fuel oil or an asphalt composition wherein the additive comprises nano-particles of a cobalt component selected from the group consisting of Co boroacylate, Co carboxylate, Co oxide, and combinations thereof; wherein the nano-particles are from about 5 to about 300 nm; and
once admixed, reducing an amount of hydrogen sulfide emissions from the heavy fuel oil or the asphalt composition over a period of from about 1 hour to 4 days.

2. The method of claim 1 wherein the additive is present at a concentration sufficient to introduce from about 20 to 2500 ppm by weight Co oxide, Co carboxylate, or Co boroacylate into the heavy fuel oil or the asphalt.

3. The method of claim 1 wherein the additive is present at a concentration sufficient to introduce from about 500 to 2000 ppm by weight Co oxide, Co carboxylate, or Co boroacylate into the heavy fuel oil or the asphalt.

4. The method of claim 1 wherein the nano-particles are from about 100 to about 300 nm.

5. The method of claim 1 wherein the nano-particles are from about 100 to about 200 nm.

6. The method of claim 1 wherein the cobalt component selected from the group consisting of Co boroacylate, Co carboxylate, and combinations thereof.

7. The method of claim 1 wherein the method comprises admixing the additive with an asphalt composition.

8. A method comprising:
admixing an additive with heavy fuel oil or an asphalt composition wherein the additive comprises nano-particles of a cobalt component selected from the group consisting of Co boroacylate, Co carboxylate, Co oxide, and combinations thereof; wherein the nano-particles are from about 100 to about 300 nm, wherein the additive is present at a concentration sufficient to introduce from about 20 to 2500 ppm by weight Co oxide, Co carboxylate, or Co boroacylate into the heavy fuel oil or the asphalt; and
once admixed, reducing an amount of hydrogen sulfide emissions from the heavy fuel oil or the asphalt composition over a period of from about 1 hour to 4 days.

9. The method of claim 8 wherein the additive is present at a concentration sufficient to introduce from about 500 to 2000 ppm by weight Co oxide, Co carboxylate, or Co boroacylate into the heavy fuel oil or the asphalt.

10. The method of claim 8 wherein the nano-particles are from about 100 to about 200 nm.

11. The method of claim 8 wherein the cobalt component selected from the group consisting of Co boroacylate, Co carboxylate, and combinations thereof.

12. The method of claim 8 wherein the method comprises admixing the additive with an asphalt composition.

13. A method comprising:
admixing an additive with heavy fuel oil or an asphalt composition wherein the additive comprises nano-particles of a cobalt component selected from the group consisting of Co boroacylate, Co carboxylate, and combinations thereof; wherein the nano-particles are from about 5 to about 300 nm, wherein the additive is present at a concentration sufficient to introduce from about 20 to 2500 ppm by weight, Co carboxylate, Co boroacylate, or mixtures thereof into the heavy fuel oil or the asphalt; and
once admixed, reducing an amount of hydrogen sulfide emissions from the heavy fuel oil or the asphalt composition over a period of from about 1 hour to 4 days.

14. The method of claim 13 wherein the additive is present at a concentration sufficient to introduce from about 500 to 2000 ppm by weight Co carboxylate, or Co boroacylate into the heavy fuel oil or the asphalt.

15. The method of claim 13 wherein the nano-particles are from about 100 to about 300 nm.

16. The method of claim 13 wherein the nano-particles are from about 100 to about 200 nm.

17. The method of claim 13 wherein the method comprises admixing the additive with an asphalt composition.

Assignees

• Baker Hughes Inc

Inventors

• Stark Joseph L
• Draper Jennifer D
• Biggerstaff Paul J
• Wolfe Donald L

Classifications

• C10C3/026

  with organic compounds · CPC title

• C10G29/00

  Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals · CPC title

• C10G29/04

  Metals, or metals deposited on a carrier · CPC title

• C10G29/06

  Metal salts, or metal salts deposited on a carrier · CPC title

• C10C3/023 Primary

  with inorganic compounds · CPC title