Amine-Modified Carbohydrate Binders for Furfural Reduction
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Solution Overview
Problem
The use of carbohydrate-based binders in composite products generates undesirable levels of furfural and hydroxymethylfurfural during preparation and curing, posing environmental, health, and regulatory concerns.
Innovation Solution
Incorporating an amine compound with primary or secondary amine functions into the binder composition, specifically at a concentration of 0.5 to 10 wt.% based on the total dry weight, to reduce the formation of furfural and hydroxymethylfurfural during the binder preparation and curing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If carbohydrate-based binders are used in composite products, then formaldehyde-free and environmentally friendly properties are improved, but furfural and hydroxymethylfurfural generation increases
Solution Approach 1:
The patent introduces an amine compound as an intermediary substance that reacts with C-5 sugars to form stable compounds, preventing the formation of harmful furfural and hydroxymethylfurfural. This intermediary mechanism allows the binder to maintain its formaldehyde-free properties while eliminating the harmful byproducts generated during curing.
Solution Approach 2:
The patent converts the harmful C-5 sugars that would otherwise generate furfural and hydroxymethylfurfural into beneficial stable compounds through reaction with the amine compound. The harmful C-5 sugar content, which varies from 5-70 wt.% in hydrolyzed carbohydrates, is transformed into a beneficial component that reduces harmful emissions while maintaining binder functionality.
2Ease of manufacture
If C-5 sugars are present in carbohydrate binders, then raw material availability and cost are improved, but furfural and hydroxymethylfurfural levels increase
Solution Approach 1:
The patent changes the chemical parameters of the binder system by introducing an amine compound that modifies the reaction pathway of C-5 sugars. This parameter change allows the binder to accept varying C-5 sugar content (5-70 wt.%) from different raw materials while controlling the formation of harmful compounds, thus maintaining ease of manufacture with diverse raw materials.
Solution Approach 2:
The amine compound serves as a mediator that interacts with C-5 sugars from various raw materials (starch, syrup, molasses, cellulose, hemicellulose) to prevent harmful reactions. This intermediary approach allows flexibility in raw material selection while eliminating the harmful effects of C-5 sugar presence.
3Object-affected harmful factors
If carbohydrate-based binders are used, then environmental friendliness is improved, but regulatory compliance regarding furfural emissions becomes more difficult
Solution Approach 1:
The patent converts the potentially harmful C-5 sugar content into a beneficial feature by using amine compounds to create stable, non-harmful compounds. This transformation ensures that the binder maintains environmental friendliness while reliably meeting regulatory standards for furfural and hydroxymethylfurfural emissions.
Solution Approach 2:
The amine compound acts as a regulatory bridge, enabling the binder to achieve both environmental friendliness and regulatory compliance. By intermediating the reaction between carbohydrates and preventing harmful byproduct formation, the system reliably meets emission standards while maintaining eco-friendly properties.
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
Significantly reduces the levels of furfural and hydroxymethylfurfural in the binder composition and its emissions, enhancing the environmental and health safety of the manufacturing process while meeting regulatory standards.
Implementation Method 1
adding to the binder composition an additional amount of from 0.5 to 10 wt. %, preferably 1 to 6 wt. % (based on the total dry weight of the binder composition) of an amine compound comprising at least one, preferably at least two amine functions
Data Source
AI summary
The present invention relates to the use of an amine compound comprising at least one, preferably at least two amine functions, wherein the amine functions are primary or secondary amines, to reduce the level of furfural and/or hydroxymethylfurfural in a carbohydrate-based binder or binder composition and/or escaping in the course of preparation, cross-linking and/or curing of carbohydrate-based binders. Preferably, the carbohydrate-based binder is obtained from a carbohydrate-based binder composition comprising a carbohydrate component and a cross-linker and possibly reaction product of carbohydrate component and cross-linker, wherein the cross-linker is selected from ammonium salts of inorganic acid, carboxylic acids, salts, ester or anhydride derivatives thereof, and/or combinations thereof.