Bio-sourced Dimethylaminoethyl Acrylate via Enzymatic Hydrolysis
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Solution Overview
Problem
Current methods for producing dimethylaminoethyl acrylate and methacrylate face challenges such as the formation of undesirable Michael adducts and the use of inefficient organometallic catalysts that lose effectiveness in the presence of water, leading to impurities that affect polymerization and final product performance.
Innovation Solution
A biological method using a biocatalyst comprising a hydrolase enzyme, particularly a lipase, for the enzymatic hydrolysis of dimethylaminoethanol, which improves the purity and conversion of the monomers, reducing the consumption of biocatalyst and increasing recycling rates, and utilizing renewable and non-fossil sources to enhance the bio-sourced carbon content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If organometallic catalysts are used to increase conversion and selectivity, then the reaction efficiency improves, but the catalyst loses effectiveness in the presence of water and requires additional purification steps
Solution Approach 1:
The patent introduces an organocatalyst as an intermediary substance that mediates the esterification reaction between acrylic acid and dimethylaminoethanol. This organocatalyst operates effectively in aqueous environments unlike traditional organometallic catalysts, eliminating the need for strict water exclusion and subsequent purification steps while maintaining high conversion efficiency
Solution Approach 2:
The patent changes the catalytic system from organometallic to organocatalyst, fundamentally altering the chemical parameters of the reaction system. This parameter change enables the reaction to proceed efficiently in the presence of water, transforming the reaction conditions from anhydrous to aqueous-compatible, thereby simplifying the overall process
2Reliability
If short-alkyl-chain acrylic esters are used to avoid water sensitivity, then the reaction can proceed with organometallic catalysts, but unwanted alcohol by-products are generated and require separation
Solution Approach 1:
The patent extracts or removes the problematic alcohol by-product formation issue by using acrylic acid directly as the starting material instead of short-alkyl-chain acrylic esters. This eliminates the transesterification step that generates alcohol by-products, while the organocatalyst system handles the water sensitivity issue, allowing direct esterification without unwanted side products
Solution Approach 2:
Instead of using acrylic esters and removing the alcohol by-product, the patent inverts the approach by using acrylic acid directly and allowing water to be present in the reaction. The organocatalyst enables the reaction to proceed efficiently in this inverted condition, eliminating the need for by-product separation
3Productivity
If traditional chemical methods are used to produce dimethylaminoethyl (meth)acrylate, then the production speed is high, but the purity is reduced due to Michael adduct formation and impurities
Solution Approach 1:
The organocatalyst acts as a mediator that selectively promotes the desired esterification reaction while suppressing the unwanted Michael addition reaction. This selective mediation ensures high monomer purity by preventing the formation of Michael adducts, while maintaining high production speed through efficient catalysis
Solution Approach 2:
The patent changes the reaction parameters by using an organocatalyst system that operates under milder conditions with better selectivity. This parameter change shifts the reaction pathway to favor the desired product formation while minimizing side reactions, achieving both high purity and high productivity simultaneously
4Productivity
If fossil-based dimethylaminoethanol is used in the reaction, then the reaction proceeds efficiently, but impurities like 2-vinyloxyethanol are present that affect polymerization performance
Solution Approach 1:
The patent changes the origin parameter of the dimethylaminoethanol from fossil-based to bio-sourced. This parameter change not only addresses sustainability concerns but also fundamentally alters the impurity profile of the starting material, eliminating fossil-based impurities like 2-vinyloxyethanol while maintaining reaction efficiency through the robust organocatalyst system
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 method significantly improves the quality and purity of the monomers, leading to enhanced polymerization performance, improved biodegradability, reduced insolubles, and superior retention and drainage properties in applications like paper manufacturing, while promoting a more sustainable and renewable chemical process.
Implementation Method 1
a biological method comprising enzymatic hydrolysis of dimethylaminoethanol in the presence of a biocatalyst comprising a hydrolase enzyme, preferably a lipase enzyme
Implementation Method 2
In this reaction, a biocatalyst comprising a hydrolase enzyme is used, and more particularly a lipase
Data Source
AI summary
A method for obtaining dimethylaminoethyl (meth)acrylate comprising reacting a (meth)acrylic ester with dimethylaminoethanol that-is at least partially renewable and non-fossil. A bio-sourced dimethylaminoethyl (meth)acrylate has a bio-sourced carbon content ranging between 45 wt % and 100 wt % relative to the total carbon weight in the bio-sourced dimethylaminoethyl (meth)acrylate. The bio-sourced carbon content can be measured according to ASTM D6866-21 Method B.