Stabilizing H2S Scavenger Formulations with Alcohol
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Solution Overview
Problem
Existing H2S scavengers with excess formaldehyde are not suitable for warm climates due to thermal instability, leading to degradation at elevated temperatures, which limits their shelf stability and effectiveness.
Innovation Solution
A stabilized hydrogen sulfide scavenger formulation including a base scavenger, free formaldehyde, and a stabilizing alcohol, where the stabilizing alcohol is added in specific proportions to enhance shelf stability at elevated temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If excess formaldehyde is added to increase H2S scavenging capacity and reduce cost, then the scavenger's capacity to react with hydrogen sulfide increases and product cost decreases, but the formulation's thermal stability deteriorates and shelf life at elevated temperatures decreases
Solution Approach 1:
A stabilizing alcohol is introduced as an intermediary substance that mediates between the excess formaldehyde and the base scavenger. The alcohol forms a stabilizing complex with formaldehyde, preventing unwanted degradation reactions while allowing the formaldehyde to remain available for H2S scavenging. This resolves the contradiction by adding a third component that protects the system's thermal stability without reducing the formaldehyde's scavenging capacity.
Solution Approach 2:
The invention changes the chemical environment parameters by introducing stabilizing alcohols in specific concentrations (10-25 wt.%). This parameter change modifies the reaction kinetics and thermodynamics of the formaldehyde-base scavenger system, shifting the balance toward greater thermal stability while preserving the high scavenging capacity provided by excess formaldehyde.
2Ease of manufacture
If excess formaldehyde is added to lower product cost, then manufacturing cost decreases, but shelf stability in warm conditions deteriorates
Solution Approach 1:
The stabilizing alcohol acts as a mediator that enables the cost-effective formulation with excess formaldehyde to achieve reliable shelf stability. By adding this intermediary component, the system maintains both the economic advantage of excess formaldehyde and the reliability requirement for warm climate storage.
Solution Approach 2:
The invention creates a composite scavenger formulation consisting of base scavenger, excess formaldehyde, and stabilizing alcohol. This composite structure combines components with different functions: the base scavenger provides H2S reaction capacity, the excess formaldehyde enhances scavenging power, and the stabilizing alcohol ensures thermal stability during storage.
3Productivity
If the scavenger formulation is designed for high H2S capacity with excess formaldehyde, then treatment effectiveness increases, but degradation at elevated temperatures increases
Solution Approach 1:
The stabilizing alcohol converts the potentially harmful effect of excess formaldehyde (thermal degradation) into a beneficial situation. By forming a stabilizing interaction, the alcohol allows the formaldehyde to remain in the formulation at high concentrations without causing degradation, thus converting what would be a harmful concentration into a beneficial one for H2S treatment effectiveness.
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 stabilized scavenger exhibits improved shelf stability for extended periods at elevated temperatures, maintaining performance comparable to non-excess formaldehyde formulations while reducing costs.
Implementation Method 1
the stabilizing alcohol can be added in an amount to provide between about 1:1 and about 10:1 molar ratio of alcohol to formaldehyde
Data Source
AI summary
Shelf-stabilized H2S scavengers and methods for preparing such shelf-stabilized H2S scavengers. In one aspect, a stabilized hydrogen sulfide scavenger configured for storage at an elevated temperature includes a base scavenger, free formaldehyde, and a stabilizing alcohol. In another aspect, a method of preparing the stabilized hydrogen sulfide scavenger includes the steps of providing a quantity of base scavenger; providing a quantity of free formaldehyde; and adding a quantity of stabilizing alcohol, wherein the quantity of stabilizing alcohol is determined as a function of the provided quantity of free formaldehyde. In yet another aspect, the stabilized scavenger includes about 25 wt. % base scavenger, wherein the base scavenger is an amine-aldehyde condensate; about 15 wt. % free formaldehyde; and between about 10 wt. % and about 25 wt. % stabilizing alcohol.