Back to results
US 10,544,282 B2Granted
Hydrogen sulfide scavengers for polymer treated asphalt
AssigneeEcolab USA Inc.
InventorsXiaowei Tong, Jennifer L. Sorrells, Prakasa Rao Anantaneni
Life of this patent
Estimating the term…
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.
Claims20
A composition, comprising:
- (a) asphalt or an asphalt mix further comprising polyphosphoric acid;
- and
- a water-free triazine sulfide scavenging agent.
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:
- water-free triazine, 1,3,5-triazine derivatives of formula I, and any combination thereof, wherein formula I comprises:
- where each of R1, R2, and R3 is independently selected from straight or branched C1-C30 alkyl, hydroxyl substituted straight or branched C1-C3o alkyl, straight or branched C1-C30 alkyl substituted with straight or branched C1-C30alkoxy.
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:
- water-free triazine, a 1,3,5-triazine derivative of formula I, and any combination thereof, wherein formula I comprises:
- wherein 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-C30alkyl substituted with straight or branched C1-C30alkoxy.
2 more elements
Dependencies are inferred from the claim text.