Lead-Free Powder Catalyst for Selective Hydrogenation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing powderous catalysts, such as Lindlar catalysts, have limitations in terms of recyclability, lead content, and selectivity in hydrogenation reactions, necessitating the development of a more efficient and lead-free catalytic system.
Innovation Solution
A powderous catalytic system utilizing a metal alloy carrier with a metal oxide layer coated with Pd-nanoparticles, specifically comprising Fe, Ni, Co, Mo, and Cr, with a CeO2 and ZnO ratio, which is easy to recycle, produce, and handle, and is free from lead, allowing for high selectivity in hydrogenation reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional Lindlar catalyst (palladium on calcium carbonate carrier treated with lead) is used, then hydrogenation activity is achieved, but lead content is present and recyclability is poor
Solution Approach 1:
The patent removes lead from the catalyst composition entirely, extracting the harmful substance while maintaining catalytic functionality through alternative metal oxide combinations (CeO2, ZnO, TiO2, Al2O3) that enable lead-free operation
Solution Approach 2:
The patent changes the carrier material from calcium carbonate to metal oxides with different chemical properties, and adjusts the palladium loading parameters to achieve optimal performance without lead contamination, improving both reliability and eliminating harmful factors
2Manufacturing precision
If conventional powderous catalysts are used, then hydrogenation reactions proceed, but selectivity is insufficient
Solution Approach 1:
The patent applies local quality by creating specific metal oxide combinations (CeO2-ZnO, CeO2-TiO2, CeO2-Al2O3) with tailored properties that provide both high selectivity for desired hydrogenation reactions and maintained productivity through optimized palladium distribution on the carrier surface
3Reliability
If complex catalyst structures are used to improve performance, then catalytic activity increases, but ease of production decreases
Solution Approach 1:
The patent uses composite metal oxide materials (CeO2-ZnO, CeO2-TiO2, CeO2-Al2O3) that combine the benefits of multiple oxides into a single versatile carrier system, achieving high catalytic performance while maintaining ease of production through standard impregnation techniques
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 new catalytic system demonstrates improved recyclability, selectivity, and ease of production and handling, enabling efficient hydrogenation processes without the need for solvents and with reduced lead content, enhancing the overall performance in hydrogenation reactions.
Implementation Method 1
a metal alloy carrier comprising (i) 45 weight-% (wt-%) - 80 wt-%, based on the total weight of the metal alloy, of Fe, and (ii) 0.5 wt-% - 30 wt-%, based on the total weight of the metal alloy, of Ni, and (iii) 0 wt-% - 20 wt-%, based on the total weight of the metal alloy, of Co, and (iv) 0 wt-% - 8 wt-%, based on the total weight of the metal alloy, of Mo, and (v) 0 wt-% - 30 wt-%, based on the total weight of the metal alloy, of Cr, and wherein the said metal alloy is coated by a metal oxide layer and impregnated with Pd-nanoparticles
Implementation Method 2
impregnated with Pd-nanoparticles
Implementation Method 3
This new catalyst has numerous advantages: The catalyst is easy to recycle (and to remove) after the reaction. This can be done i.e. by filtration, magnetisation.
Data Source
AI summary
The present invention is related to a new metal powder catalytic system (catalyst), its production and its use in hydrogenation processes.