Hydrogenation Catalyst Preparation via Constant Stoichiometry Delivery
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Solution Overview
Problem
Existing methods for preparing hydrogenation catalysts face issues with variable Al:Ni ratios during the reaction, leading to inactivation or insufficient active species, and long-term storage is not feasible.
Innovation Solution
A method involving contemporaneously delivering an organoaluminum compound and a nickel alkoxylate to a reaction vessel at a constant stoichiometry, ensuring a stable Al:Ni ratio, which reacts to form a hydrogenation catalyst with superior activity and shelf stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nickel compound is added to aluminum compound or vice versa in traditional methods, then catalyst formation occurs, but variable Al:Ni ratio results in inactivation or insufficient active species
Solution Approach 1:
The patent introduces separate delivery systems (syringes or pumps) as intermediary devices to control the addition of nickel and aluminum compounds. These intermediaries enable precise metering and simultaneous delivery of reagents at controlled rates, ensuring constant stoichiometric ratios during catalyst formation, thereby preventing inactivation and ensuring sufficient active species.
Solution Approach 2:
The patent changes the delivery parameters by using controlled flow rates through syringes or pumps instead of direct mixing. By adjusting and maintaining specific flow rate ratios, the system achieves constant Al:Ni stoichiometry during the reaction, resolving the variability issue that leads to catalyst inactivation or insufficient activity.
2Duration of action of stationary object
If traditional catalyst preparation methods are used, then catalyst formation is achieved, but long-term storage is not feasible due to instability
Solution Approach 1:
The patent segments the catalyst system into separate nickel and aluminum compound deliveries. By maintaining constant stoichiometric ratios through controlled simultaneous delivery, the resulting catalyst exhibits improved stability for long-term storage while maintaining effectiveness, as the precise ratio prevents formation of inactive species and ensures stable catalyst structure over time.
3Reliability
If constant stoichiometry is maintained during reagent delivery, then catalyst activity and shelf stability are improved, but delivery system complexity increases
Solution Approach 1:
While the patent does introduce intermediary delivery devices (syringes or pumps), these are standard laboratory equipment that provide reliable and relatively simple control mechanisms. The benefit of improved catalyst performance through constant stoichiometry outweighs the moderate increase in device complexity, as the delivery systems are well-understood and easily implemented.
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
The method achieves higher catalyst activity and better shelf stability compared to traditional methods, allowing the catalyst to operate outside previously used Ni:Al ratios and maintain effectiveness for extended storage periods.
Implementation Method 1
The organoaluminum compound reacting with the nickel alkoxylate in the reaction vessel to form the hydrogenation catalyst
Data Source
AI summary
A method of forming a hydrogenation catalyst includes providing a first fluid including a first reagent in a first reagent dispensing device, the first reagent including an organoaluminum compound and providing a second fluid including a second reagent in a second reagent dispensing device, the second reagent including a nickel alkoxylate. The method further includes contemporaneously delivering the first fluid from the first reagent dispensing device and the second fluid from second reagent dispensing device to a reaction vessel at a constant stoichiometry of aluminum in the organoaluminum compound to nickel in the nickel alkoxylate, the organoaluminum compound reacting with the nickel alkoxylate in the reaction vessel to form the hydrogenation catalyst.