Amine Additives Inactivate Sulfur Compounds to Stop Hydrogen Sulfide Release
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Solution Overview
Problem
Corrosion inhibitors in oxygenated aqueous systems, such as pyrophosphates, react to form hydrogen sulfide, which is difficult to remove and can accumulate, posing environmental and safety concerns, and traditional scavengers like triazines containing water are not effective in these systems.
Innovation Solution
Introducing additives like aminals and dialkylamines into the corrosion inhibitor system to inactivate sulfur and phosphorous-containing compounds, preventing further hydrogen sulfide release by forming stable products, thereby reducing H2S accumulation in the headspace.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pyrophosphates are used as corrosion inhibitors in oxygenated systems, then corrosion protection is achieved, but hydrogen sulfide is released and accumulates in the headspace
Solution Approach 1:
An amine additive is introduced as an intermediary substance that reacts with the phosphorous-containing corrosion inhibitor to form a stable adduct. This intermediary reaction prevents the decomposition pathway that would otherwise release hydrogen sulfide, while maintaining the corrosion inhibition function. The amine acts as a mediator between the corrosive environment and the inhibitor, modifying its behavior to eliminate harmful byproducts.
Solution Approach 2:
The chemical structure and reactivity parameters of the corrosion inhibitor are modified through the addition of amine compounds. The amine-adduct formation changes the molecular parameters of the phosphorous-containing compound, altering its decomposition characteristics to prevent H2S generation while preserving its corrosion protective properties in oxygenated environments.
2Object-generated harmful factors
If traditional H2S scavengers like triazines are used, then hydrogen sulfide removal is attempted, but they contain water and are ineffective in this application
Solution Approach 1:
Instead of using traditional aqueous H2S scavengers, the invention employs amine additives that are compatible with the non-aqueous corrosion inhibitor system. The parameter change involves selecting additives with appropriate solubility and reactivity characteristics for the specific corrosion inhibitor formulation, enabling effective H2S prevention without introducing water into the system.
3Ease of operation
If water is present in the system, then it reacts with O,O-disubstituted dithiophosphoric acid to form additional hydrogen sulfide
Solution Approach 1:
The amine additive performs a preliminary reaction with the phosphorous-containing compound to form a stable adduct before water can interact with it. This preliminary anti-action prevents the water-induced decomposition pathway that would generate additional hydrogen sulfide during storage and handling, proactively eliminating the harmful effect before it can occur.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The additive effectively inactivates a majority of sulfur and phosphorous-containing compounds, reducing hydrogen sulfide release by more than 50%, ensuring a safer and less corrosive environment in the system.
Implementation Method 1
Introducing additives like aminals and dialkylamines into the corrosion inhibitor system to inactivate sulfur and phosphorous-containing compounds, preventing further hydrogen sulfide release by forming stable products
Data Source
AI summary
An additive, such as an aminal, a dibutylamine, or combinations thereof, may treat a system having a corrosion inhibitor in the form of at least one sulfur species and/or at least one phosphorous-containing compound. The additive may be introduced or added to the corrosion inhibitor within an aqueous system, an aerobic system, and/or an anaerobic system to inactivate the sulfur species and/or the phosphorous-containing compounds.