Polyaromatic Resin Catalyst for Acrylic Acid Production
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Solution Overview
Problem
Current methods for producing acrylic acid and other α,β-unsaturated carboxylic acids face challenges due to low yields and complex separation processes, particularly in homogeneous reactions involving traditional catalysts and precursors derived from fossil fuels, which are becoming scarce.
Innovation Solution
The use of a heterogeneous reaction system with a sulfur oxoacid anion-substituted or phosphorus oxoacid anion-substituted polyaromatic resin, combined with a nickel catalyst, to couple ethylene and carbon dioxide, forming a metalalactone that is destabilized to produce acrylic acid, facilitating easier separation and higher yields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If homogeneous reaction processes are used with traditional catalysts, then the reaction can proceed efficiently, but the separation and isolation of the desired product becomes difficult and yields are poor
Solution Approach 1:
The patent divides the reaction system into heterogeneous phases by using a solid-supported catalyst (polymer-bound nickel catalyst) instead of a homogeneous catalyst. This segmentation allows the catalyst to remain in the solid phase while the product forms in the liquid phase, enabling easy separation through filtration or decantation, thus resolving the contradiction between reaction efficiency and product isolation difficulty
Solution Approach 2:
The patent introduces a polymer support as an intermediary carrier for the nickel catalyst. This polymer matrix acts as a mediator that holds the catalyst in a fixed, separable form while allowing reactants to access active sites and products to be released into the solution phase, facilitating both efficient catalysis and easy product separation
2Adaptability or versatility
If fossil fuel-derived precursors are used for acrylic acid production, then current production methods can be maintained, but reserves are diminishing and renewable alternatives are needed
Solution Approach 1:
The patent fundamentally changes the feedstock parameter from fossil fuel-derived propylene to renewable carbon dioxide as the carbon source. This parameter change enables the use of abundant, renewable CO2 instead of depleting fossil fuel reserves, while the novel catalytic system maintains production efficiency by directly carboxylating olefins with CO2 to form acrylic acid
3Productivity
If a two-stage oxidation process is used for acrylic acid production, then propylene can be converted to acrylic acid, but the process is complex and requires multiple steps
Solution Approach 1:
The patent merges multiple reaction steps into a single direct carboxylation reaction. Instead of using the traditional two-stage oxidation process (propylene to acrolein, then to acrylic acid), the invention combines the carbon source activation and carboxylation into one step where olefins directly react with CO2 to form acrylic acid, significantly simplifying the process flow and reducing the number of required process units
Solution Approach 2:
The patent extracts and eliminates the intermediate oxidation steps from the traditional synthesis pathway. By removing the acrolein intermediate and the two-stage oxidation sequence, the invention creates a direct route from olefin and CO2 to acrylic acid, reducing process complexity and improving overall efficiency
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
This approach enhances the ease of product separation and achieves surprisingly high yields of α,β-unsaturated carboxylic acids like acrylic acid, leveraging renewable carbon dioxide and reducing dependence on fossil fuel-derived precursors.
Implementation Method 1
When combined with a catalyst such as a nickel catalyst, ethylene and carbon dioxide can be coupled to form a metalalactone
Implementation Method 2
the sulfonated or the phosphonated polyaromatic resin can subsequently destabilize the metalalactone which eliminates a metal acrylate
Data Source
AI summary
This disclosure provides for catalyst systems and processes for forming an α,β-unsaturated carboxylic acid or a salt thereof. In an aspect, the catalyst system can comprise: a transition metal precursor comprising a Group 8-11 transition metal and at least one first ligand; optionally, at least one second ligand; an olefin; carbon dioxide (CO2); a diluent; and an oxoacid anion-substituted polyaromatic resin comprising a sulfonated polyaromatic resin, a phosphonated polyaromatic resin, a sulfinated polyaromatic resin, a thiosulfonated, or a thiosulfinated polyaromatic resin, and further comprising associated metal cations. Methods of regenerating the polyaromatic resin with associated metal cations are described.