Alkyl Lactone Hydroxyamides and Hydroxyesters for Gas Hydrate Dispersion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for preventing natural gas hydrate agglomerate formation in petroleum liquids are costly, toxic, and inefficient, particularly under high-pressure and low-temperature conditions common in petroleum recovery and transportation.
Innovation Solution
Compositions comprising alkyl lactone-derived hydroxyamides and hydroxyesters, formed by reacting alkyl lactones with amines or alcohols, are introduced into fluids to inhibit the formation of gas hydrate agglomerates, dispersing them as a slurry and reducing the risk of pipeline blockages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermodynamic gas hydrate inhibitors (THIs) are used to prevent hydrate formation, then hydrate inhibition is achieved, but the dosage required is high (50-100% of water volume) leading to high transportation and storage costs
Solution Approach 1:
The patent transitions from using traditional THI molecules to low dosage hydrate inhibitors (LDHIs) with different molecular structures and mechanisms. The LDHIs contain specific functional groups (carboxylic acid, hydroxyl, amine) that enable effective hydrate inhibition at much lower concentrations (0.1-5 volume percent) by interfering with hydrate crystal growth kinetics rather than thermodynamically suppressing formation
Solution Approach 2:
The invention uses composite inhibitor formulations containing multiple LDHI compounds with different functional groups (carboxylic acids, hydroxyls, amines) working synergistically. This composite approach enhances inhibition effectiveness while maintaining low dosage requirements, resolving the contradiction between reliability and quantity
2Reliability
If traditional gas hydrate inhibitors are used, then hydrate prevention is achieved, but environmental toxicity is high
Solution Approach 1:
The patent employs LDHIs with specific molecular characteristics (lower molecular weight, specific functional groups) that provide effective hydrate prevention while exhibiting lower environmental toxicity. The carboxylic acid and hydroxyl groups enhance solubility and effectiveness at low doses, reducing the need for large quantities of toxic chemicals
Solution Approach 2:
The LDHI compounds are designed to be biodegradable and environmentally friendly, replacing persistent toxic inhibitors. The low dosage requirement means less environmental burden overall, even though individual molecules may be less stable, as they break down more readily without accumulating toxic effects
3Reliability
If high concentrations of inhibitors are used to prevent hydrate agglomerates, then pipeline blockage prevention is achieved, but the cost of chemical transportation and storage increases substantially
Solution Approach 1:
The patent uses LDHIs that achieve effective pipeline protection at 0.1-5 volume percent concentration compared to traditional inhibitors requiring 50-100% of water volume. This dramatic reduction in dosage directly decreases transportation and storage costs while maintaining reliable blockage prevention through kinetic inhibition mechanisms
Solution Approach 2:
The low dosage requirement makes the inhibitor system more cost-effective overall. Even if the inhibitor needs continuous addition, the total quantity required is so small that transportation and storage costs are substantially reduced compared to traditional high-dosage inhibitors
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 alkyl lactone-derived compounds effectively inhibit gas hydrate agglomerate formation with lower toxicity and dosage, reducing the risk of pipeline blockages and environmental impact while maintaining operational efficiency.
Implementation Method 1
AAs function to keep natural gas hydrate crystals and agglomerates dispersed as a slurry within the liquid hydrocarbon
Data Source
AI summary
Disclosed are alkyl lactone-derived hydroxyamides and alkyl lactone-derived hydroxyesters used in compositions and methods for inhibiting natural gas hydrate agglomerates. The alkyl lactone-derived hydroxyamides and alkyl lactone-derived hydroxyesters are reaction products of an alkyl lactone and an amine, and an alkyl lactone and an alcohol, respectively.