Ruthenium-Cobalt Catalyst System for CO2 Hydroformylation
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Solution Overview
Problem
Conventional hydroformylation methods using carbon dioxide as a raw material require significant amounts of toxic carbon monoxide and rare ruthenium catalysts, posing environmental and economic challenges.
Innovation Solution
A method utilizing a catalyst system comprising a ruthenium compound and a cobalt compound, along with a halide salt and acid, to efficiently hydroformylate organic compounds with carbon dioxide and hydrogen at controlled temperatures and pressures, reducing the amount of ruthenium needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carbon monoxide is used as a raw material in hydroformylation, then the reaction can proceed effectively, but the toxicity and environmental harm significantly increase
Solution Approach 1:
The patent converts carbon dioxide, which was previously considered a harmful waste product, into a useful raw material for hydroformylation reactions. By using carbon dioxide instead of carbon monoxide, the process transforms an environmentally harmful substance into a beneficial reactant, eliminating toxicity issues while maintaining reaction effectiveness through the catalyst system.
2Productivity
If a ruthenium-containing compound is used as a catalyst to activate carbon dioxide, then the reaction can proceed, but the cost and rarity issues increase due to limited production amount
Solution Approach 1:
The patent merges ruthenium and cobalt compounds into a dual-catalyst system where cobalt acts as a co-catalyst. This combination allows the ruthenium component to work more efficiently, enabling the use of smaller amounts of ruthenium while maintaining high reaction capability. The cobalt compound enhances the overall catalytic activity, reducing dependence on the scarce ruthenium metal.
Solution Approach 2:
The cobalt compound serves as an intermediary that facilitates the interaction between ruthenium and carbon dioxide. By introducing cobalt as a mediating catalyst, the system achieves more efficient carbon dioxide activation, allowing reduced ruthenium loading while maintaining effective catalysis.
3Productivity
If a large amount of ruthenium is used as a catalyst, then the reaction efficiency is maintained, but the cost and scarcity problems worsen
Solution Approach 1:
The patent combines ruthenium and cobalt compounds in a synergistic catalyst system. This merging of two metal compounds creates a more efficient catalytic system where the cobalt component enhances the ruthenium's activity, allowing the process to maintain high reaction efficiency while using significantly reduced amounts of expensive and scarce ruthenium, thereby improving ease of manufacture.
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 high-yield production of alcohols using a smaller amount of ruthenium, enhancing reaction efficiency and environmental safety by substituting carbon monoxide with carbon dioxide and reducing the cost and scarcity issues associated with ruthenium.
Implementation Method 1
a catalyst system comprising a ruthenium compound and a cobalt compound
Data Source
AI summary
A method for producing an alcohol including hydroformylating an organic compound having an unsaturated carbon bond with carbon dioxide and hydrogen using a catalyst system containing a ruthenium compound and a cobalt compound in combination.