Aldehyde-Amine Adducts Preventing Solid Formation in Sulfur Scavenging
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Solution Overview
Problem
Existing processes for preparing aldehyde-amine products, such as formaldehyde-amine adducts, often result in products that form solids or gels when exposed to noxious sulfur species, contain free formaldehyde, and are cost-ineffective, leading to equipment plugging and safety hazards.
Innovation Solution
A novel process involving an amine to formaldehyde ratio of approximately 1:2 in the presence of an alcohol at controlled temperature and time, producing aldehyde-amine adducts that are substantially formaldehyde-free, non-foaming, and have enhanced scavenging activity, with specific gravity used as a quality control metric to ensure reproducibility and effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional aldehyde-amine adducts are used as sulfur scavengers, then sulfur scavenging function is provided, but solids or gels form upon exposure to noxious sulfur species causing equipment plugging
Solution Approach 1:
The patent changes the chemical composition parameters by using a specific amine-to-aldehyde molar ratio of 1:2 and controlling the reaction in the presence of alcohol to produce adducts with optimized molecular structure that prevent solid formation while maintaining sulfur scavenging capability
Solution Approach 2:
The patent creates a composite chemical structure by reacting amine with aldehyde in a controlled manner to form adducts that combine the sulfur-scavenging properties of conventional adducts with the fluidity characteristics of alcohol-based formulations, preventing plugging while maintaining function
2Object-affected harmful factors
If conventional formaldehyde-amine adducts are used, then sulfur scavenging activity is achieved, but free formaldehyde remains in the product
Solution Approach 1:
The patent changes the reaction parameters by using a specific amine-to-formaldehyde molar ratio of 1:2 and controlling reaction conditions to ensure complete reaction of formaldehyde, eliminating free formaldehyde from the final product while maintaining scavenging activity
Solution Approach 2:
The patent uses alcohol as an intermediary substance during the reaction process that helps control the reaction pathway and ensures complete incorporation of formaldehyde into the adduct structure, preventing residual free formaldehyde
3Object-affected harmful factors
If conventional aldehyde-amine adducts are used, then sulfur scavenging function is provided, but cost effectiveness is reduced
Solution Approach 1:
The patent optimizes the amine-to-aldehyde ratio to 1:2, which improves scavenging activity per unit cost, and uses readily available alcohol as a solvent to reduce manufacturing costs while enhancing product performance
Solution Approach 2:
The patent eliminates the need for expensive post-processing steps to remove solids or free formaldehyde by designing a reaction process that inherently produces a stable, formaldehyde-free product, reducing manufacturing costs
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 process efficiently produces aldehyde-amine adducts with significantly improved scavenging activity, preventing solid formation, reducing equipment plugging, and ensuring safety by eliminating detectable formaldehyde, while being cost-effective and non-foaming.
Implementation Method 1
the reaction of an amine and a source of formaldehyde
Implementation Method 2
The addition of alcohols during the amine-formaldehyde reaction mixtures give rise to alcoholic adducts
Data Source
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Figure 1C
AI summary
A novel method for producing amine-aldehyde sulfur scavenging compositions are disclosed, where the method comprises contacting an amine containing component and a aldehyde containing component in the presence of an alcohol at an amine to aldehyde ratio of between about 0.8 and 0.45 for a reaction time and at a reaction temperatures sufficient to produce an amine-aldehyde adduct product having a specific gravity between about 3% and 7% less than the specific gravity of a mixture of starting materials.