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US 2018/0163021 A1Published application
Hydrogen sulfide scavengers for polymer treated asphalt
AssigneeEcolab USA Inc.
InventorsXiaowei Tong, Jennifer L. Sorrells, Prakasa Rao Anantaneni
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Abstract
Scavenging compounds and compositions useful in reducing sulfide emissions from polymer treated asphalt, such as polyphosphoric acid, are disclosed. The scavengers include hexamethyl-enetetramine, water-free triazine, and water-free 1,3,5-triazine derivatives of formula I. Methods of using the compositions to reduce hydrogen sulfide emissions from asphalt are also disclosed.
Claims19
A composition, comprising:
- (a) asphalt or an asphalt mix further comprising polyphosphoric acid;
- and
- (b) a sulfide scavenging agent selected from the group consisting of:
- hexamethylenetetramine, water-free triazine, and 1,3,5-triazine derivatives of formula I
- where each of R1, R2, and R3 is independently selected from straight or branched C1-C30 alkyl, hydroxyl substituted straight or branched C1-C30 alkyl, straight or branched C1-C30 alkyl substituted with straight or branched C1-C30 alkoxy.
2 more elements
A method of reducing hydrogen sulfide emission from asphalt, comprising:
- combining polyphosphoric acid treated asphalt or asphalt mix with a sulfide scavenging agent, the sulfide scavenging agent selected from the group consisting of:
- hexamethylenetetramine, water-free triazine, and 1,3,5-triazine derivatives of formula I
- where each of R1, R2, and R3 is independently selected from straight or branched C1-C30 alkyl, hydroxyl substituted straight or branched C1-C30 alkyl, straight or branched C1-C30 alkyl substituted with straight or branched C1-C30 alkoxy.
Dependencies are inferred from the claim text.