Solid Promoter Catalysis for Acrylic Acid Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing acrylic acid from propylene involve a two-stage oxidation process, which is inefficient and difficult to scale due to the limited availability of propylene, whereas using carbon dioxide and ethylene offers a more abundant and renewable alternative.
Innovation Solution
A process utilizing a solid promoter in a heterogeneous system to facilitate the formation of acrylic acid, involving the contact of a metallalactone or transition metal-ligand complex with carbon dioxide and an olefin, followed by treatment with a solid promoter to produce the α,β-unsaturated carboxylic acid, such as acrylic acid, with improved yields and ease of separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a homogeneous catalyst system is used to produce acrylic acid, then the reaction can proceed, but the yield is poor and separation/isolation is difficult
Solution Approach 1:
A solid promoter acts as an intermediary substance that facilitates the reaction between the metallalactone and diluent to form acrylic acid. The solid promoter provides active sites for the reaction to occur, enabling high yield production while maintaining ease of separation due to its heterogeneous nature
Solution Approach 2:
The solid promoter utilizes porous material characteristics to provide surface area for catalytic activity. The porous structure allows reactants to access active sites while maintaining physical separation from the product, enabling both high yield and easy isolation through filtration or decantation
2Productivity
If a two-stage oxidation process is used to produce acrylic acid from propylene, then the product can be obtained, but the process is inefficient and difficult to scale
Solution Approach 1:
The reaction system is segmented into distinct functional components: the metallalactone provides the carbon framework, the solid promoter provides catalytic activity, and the diluent facilitates the reaction medium. This segmentation allows each component to be optimized independently and simplifies the overall process
Solution Approach 2:
The process utilizes parameter changes in the reaction conditions, including temperature, pressure, and composition ratios, to optimize the formation of acrylic acid from carbon dioxide and ethylene. By controlling these parameters, the process achieves high efficiency in a single stage rather than requiring multiple oxidation steps
3Quantity of substance
If propylene is used as the starting material, then acrylic acid can be produced, but the availability is limited
Solution Approach 1:
The process changes the starting material from propylene to a combination of carbon dioxide and ethylene, which are more abundant and renewable resources. This parameter change in feedstock availability enables scalable production while maintaining high productivity through the optimized solid promoter catalysis
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 method achieves high yields of acrylic acid with improved separation efficiency, leveraging the abundance of ethylene and carbon dioxide, and replacing the multi-step oxidation process with a more efficient and scalable process.
Implementation Method 1
contacting (a) a metallalactone; (b) a diluent; and (c) a solid promoter; forming an adduct of an α,β-unsaturated carboxylic acid adsorbed onto the solid promoter
Implementation Method 2
forming an adduct of an α,β-unsaturated carboxylic acid adsorbed onto the solid promoter
Data Source
AI summary
Processes for producing an α,β-unsaturated carboxylic acid, such as acrylic acid, or a salt thereof, using solid promoters are disclosed. The solid promoters can be certain solid oxides, mixed oxides, and clays, illustrative examples of which can include alumina, zirconia, magnesia, magnesium aluminate, sepiolite, and similar materials.