Electrochemical Regeneration of Chloroaluminate Ionic Liquid Catalysts
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Solution Overview
Problem
Existing methods for regenerating ionic liquid catalysts are inefficient and require additional equipment and reagents, such as chemical reagents or hydrogenation processes, which can form by-products and complicate the regeneration process.
Innovation Solution
An electrochemical process involving the application of voltage across electrode pairs immersed in a spent ionic liquid catalyst to free conjunct polymers and regenerate the catalyst, without the need for chemical reagents or by-product handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chemical reagents or hydrogenation processes are used to remove conjunct polymers, then catalyst regeneration is achieved, but additional equipment and reagents are required which complicate the process and form by-products
Solution Approach 1:
The patent replaces chemical processes (hydrogenation, chemical treatment) with an electrochemical process. By applying electrical current through electrode pairs immersed in the spent ionic liquid catalyst, conjunct polymers are electrochemically removed without requiring additional chemical reagents or complex hydrogenation equipment, thus simplifying the regeneration process while maintaining effectiveness
Solution Approach 2:
The electrochemical regeneration process uses the ionic liquid catalyst itself as the electrolyte medium. The electrode pairs directly interact with the spent catalyst, enabling self-regeneration without external reagents. The process leverages the inherent properties of the ionic liquid to facilitate polymer removal through electrochemical reactions at the electrode surfaces
2Reliability
If conventional regeneration methods are used, then conjunct polymers are removed, but by-products are formed that require additional handling and processing
Solution Approach 1:
The patent converts the harmful effect of conjunct polymers (which deactivate the catalyst) into a beneficial electrochemical process. The polymers that would normally be harmful by-products become the subject of electrochemical oxidation at the anode, transforming them into removable species. This approach eliminates the formation of additional harmful by-products while efficiently removing the deactivating polymers
3Reliability
If ionic liquid catalysts are replaced instead of regenerated, then active catalyst is available, but economic feasibility is reduced due to high replacement costs
Solution Approach 1:
The patent implements a recovery process for the ionic liquid catalyst by removing deactivated conjunct polymers through electrochemical treatment. Instead of discarding spent catalyst and purchasing new catalyst, the system recovers and regenerates the existing catalyst, maintaining its activity for repeated use in alkylation reactions and thereby reducing material loss and associated 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
This process simplifies the regeneration of ionic liquid catalysts by effectively removing conjunct polymers, restoring catalyst activity without the formation of additional by-products, and allows for the recycling of the regenerated catalyst.
Implementation Method 1
applying a voltage across one or more electrode pairs immersed in a spent ionic liquid catalyst comprising conjunct polymer-metal halide complexes to provide freed conjunct polymers and a regenerated ionic liquid catalyst
Data Source
AI summary
A process for regenerating a spent ionic liquid catalyst including (a) applying a voltage across one or more pairs of electrodes immersed in a spent ionic liquid catalyst comprising conjunct polymer-metal halide complexes to provide freed conjunct polymers and a regenerated ionic liquid catalyst; and (b) separating the freed conjunct polymers from the regenerated ionic liquid catalyst is described. An alkylation process incorporating the regeneration process is also described.