Sulfur scavenging materials

Patent metadata

Field	Value
Publication number	US-10604539-B2
Application number	US-201916240493-A
Country	US
Kind code	B2
Filing date	Jan 4, 2019
Priority date	Jun 3, 2014
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

Materials which react with (“scavenge”) sulfur compounds, such as hydrogen sulfide and mercaptans, are useful for limiting sulfur-induced corrosion. Surface-modified particles incorporating a hexahydrotriazine moiety are disclosed and used as sulfur scavengers. These surface-modified particles are used a filter media in fixed filter systems and as additives to fluids including sulfur compounds. The hexahydrotriazine moiety can react with sulfur compounds in such a manner as to bind sulfur atoms to the surface-modified particles, thus allowing removal of the sulfur atoms from fluids such as crude oil, natural gas, hydrocarbon combustion exhaust gases, sulfur polluted air and water. The surface-modified particles may, in general, be sized to allow separation of the particles from the process fluid by sedimentation, size-exclusion filtration or the like.

First claim

What is claimed is:

1. A surface-attached molecule, comprising:

wherein:
LG is a linking group covalently bonded to a nitrogen atom of a hexahydrotriazine moiety and a surface, and
AR is an electron-donating group.

2. The surface-attached molecule of claim 1 , wherein the electron-donating group includes an aromatic moiety.

3. The surface-attached molecule of claim 1 , wherein the electron-donating group is a N,N-dimethylamino-p-phenyl group.

4. The surface-attached molecule of claim 1 , wherein the electron-donating group is a phenyl group.

5. The surface-attached molecule of claim 1 , wherein the electron-donating group is one of a methyl ether, a pyrene, a hydroxyl group, a sulfhydryl group, or an alkylthio group.

6. The surface-attached molecule of claim 1 , wherein the linking group is a straight-chain alkyl group including at least three carbon atoms.

7. The surface-attached molecule of claim 1 , wherein the linking group is an alkyl silyl group.

8. The surface-attached molecule of claim 7 , wherein the alkyl silyl group is a propyltriethoxysilyl group.

9. The surface-attached molecule of claim 1 , wherein AR is at least one of the following:

10. The surface-attached molecule of claim 1 , wherein the surface is an outer surface of a silica particle.

11. A surface-attached molecule, comprising:

wherein:
LG is a linking group covalently bonded to a nitrogen atom of a hexahydrotriazine moiety and a surface, and
AR is an electron-donating group, the electron-donating group comprising an aromatic moiety.

12. The surface-attached molecule of claim 11 , wherein the electron-donating group is a N,N-dimethylamino-p-phenyl group.

13. The surface-attached molecule of claim 11 , wherein the electron-donating group is a phenyl group.

14. The surface-attached molecule of claim 11 , wherein the linking group comprises a straight-chain alkyl group including at least three carbon atoms.

15. The surface-attached molecule of claim 11 , wherein the linking group comprises an alkyl silyl group.

16. The surface-attached molecule of claim 15 , wherein the alkyl silyl group is a propyltriethoxysilyl group.

17. The surface-attached molecule of claim 11 , wherein AR is at least one of the following:

18. The surface-attached molecule of claim 11 , wherein the surface is an outer surface of a silica particle.

19. A surface-attached molecule, comprising:

wherein:
LG is a linking group covalently bonded to a nitrogen atom of a hexahydrotriazine moiety and a surface, wherein the linking group comprises a straight-chain alkyl group having at least three carbon atoms, and
AR is an electron-donating group, the electron-donating group comprising an aromatic moiety.

20. The surface-attached molecule of claim 19 , wherein the surface is an outer surface of a silica particle.

Assignees

• IBM

Inventors

• Boday Dylan J
• Garcia Jeannette M
• Hedrick James L
• Wojtecki Rudy J

Classifications

• C02F2303/08

  Corrosion inhibition · CPC title

• B01D2257/304

  Hydrogen sulfide · CPC title

• Y10T428/2991

  Coated · CPC title

• B01D2257/306

  Organic sulfur compounds, e.g. mercaptans · CPC title

• B01D53/48

  Sulfur compounds · CPC title