Ionic Liquid Catalyst Regeneration via Metal Complex Extraction
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Solution Overview
Problem
Existing methods for regenerating ionic liquid catalysts used in hydrocarbon conversion processes, such as alkylation and isomerization, face challenges in achieving high conversion rates of conjunct polymers and often result in undesirable byproducts or safety issues, limiting their effectiveness and economic viability.
Innovation Solution
A method involving the use of metal complexes with specific formulas, such as M1n+Rn or [M2a+]x[M3b+yRz], to react with deactivated ionic liquid catalysts containing conjunct polymers, allowing for their separation and regeneration without the need for added hydrogen or elemental metals, under mild conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional regeneration methods using reducing metals or hydrogenation catalysts are used, then conjunct polymer can be removed from the ionic liquid catalyst, but safety hazards and additional process complexity are introduced
Solution Approach 1:
The patent extracts the harmful elements (elemental metals and hydrogen) from the regeneration process by using a metal complex that already contains the reducing agent in a stable, non-hazardous form. The metal complex delivers the necessary reducing capability without requiring separate handling of dangerous materials.
Solution Approach 2:
The metal complex acts as an intermediary that mediates the reduction of conjunct polymer. Instead of using direct contact with elemental metals or hydrogen gas, the metal complex serves as a controlled intermediate that transfers reducing capability to the conjunct polymer in a safe and controlled manner.
2Productivity
If traditional regeneration processes with hydrogenation catalysts are employed, then conjunct polymer conversion can be achieved, but operating and capital costs increase
Solution Approach 1:
The patent changes the chemical parameters of the regeneration system by using a pre-formed metal complex with specific reducing capability. This alters the reaction conditions to be more favorable, requiring milder temperatures and shorter reaction times, which directly reduces energy consumption and operational costs.
Solution Approach 2:
The patent replaces the mechanical/thermal intensity required in traditional hydrogenation processes with a chemically-driven reduction mechanism. The metal complex provides the reducing power through chemical reaction rather than requiring high temperature and pressure mechanical conditions, thereby reducing energy input requirements.
3Reliability
If reducing metals are used for regeneration, then conjunct polymer removal is possible, but additional process steps and complexity are required
Solution Approach 1:
The patent merges the reducing agent and the catalyst function into a single metal complex molecule. This combination eliminates the need for separate reducing agent addition and catalyst systems, simplifying the overall process while maintaining effective conjunct polymer removal and catalyst reactivation.
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 enables efficient regeneration of ionic liquid catalysts with high conjunct polymer conversion rates, reduces operating and capital costs, and avoids safety hazards associated with elemental metals, while allowing for the reactivation and recycling of the catalysts.
Implementation Method 1
Hydrogen would be introduced, and the conjunct polymer would be reduced and transferred to the hydrocarbon layer
Data Source
AI summary
A method for regenerating deactivated ionic liquid catalyst containing conjunct polymer. The deactivated ionic liquid catalyst containing the conjunct polymer is contacted with either at least one metal complex having a general formula M1n+Rn, or at least one metal complex having a general formula [M2a+]x[M3b+yRz](xa/(z−by)). The conjunct polymer reacts with the reagent and can be extracted from the ionic liquid. The mixture is separated into a hydrocarbon effluent and an ionic liquid effluent.