Copper-Based Catalyst Precursor for Isomerization Selectivity
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Solution Overview
Problem
Current copper-based catalysts for isomerizing β,γ-unsaturated alcohols, such as 2,7-octadiene-1-ol to 7-octenal, face challenges with low conversion ratios and selectivity, particularly in separating the target substance 7-octenal from byproducts, necessitating the development of a catalyst with improved performance.
Innovation Solution
A copper-based catalyst precursor is developed by calcining a mixture of copper, iron, aluminum, and calcium silicate with specific atomic ratios and calcination temperatures, which enhances the conversion ratio and selectivity of 7-octenal in isomerization reactions, and can also be used for hydrogenation reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional copper-based catalysts are used for isomerization of β,γ-unsaturated alcohols, then the reaction can proceed, but the conversion ratio and selectivity are low
Solution Approach 1:
The patent uses a composite catalyst system containing copper, iron, and aluminum in specific atomic ratios. This composite material approach combines multiple metal elements to achieve both high conversion ratio and high selectivity in the isomerization reaction, resolving the contradiction between productivity and manufacturing precision.
Solution Approach 2:
The patent optimizes specific parameters including the atomic ratio of Cu:Fe:Al (1:1.5:1), calcination temperature (600-1000°C), and calcination time (2-10 hours) to achieve the desired catalyst performance. By carefully controlling these parameters, the catalyst achieves both high conversion ratio and high selectivity simultaneously.
2Reliability
If the atomic ratio of copper, iron, and aluminum is changed, then the dispersibility and activity of copper changes, but the manufacturing complexity increases
Solution Approach 1:
The patent establishes specific parameter ranges for the atomic ratios (Cu:Fe:Al = 1:1.5:1) and calcination conditions (600-1000°C for 2-10 hours) that optimize catalyst activity while maintaining manageable manufacturing complexity. These standardized parameters make the manufacturing process reproducible and controllable.
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 catalyst precursor achieves high conversion ratios and selectivity in isomerization reactions and can be effectively used in hydrogenation processes, improving the production of 7-octenal and other compounds like 1-octanol, with an industrially viable production method.
Implementation Method 1
When the coprecipitate containing copper, iron, and aluminum is calcined at a temperature in a range of 600°C to 1,000°C, a spinel structure is formed.
Implementation Method 2
when the copper-based catalyst precursor is hydrogen-reduced, the precursor becomes activated, and then can be used in desired reactions as a copper-based catalyst.
Data Source
AI summary
A copper-based catalyst precursor capable of achieving a high conversion ratio and high selectivity in the isomerization reaction of a β,γ-unsaturated alcohol portion and a method for producing the same and to provide a hydrogenation method in which the copper-based catalyst precursor is used are provided. Specifically, a copper-based catalyst precursor obtained by calcining a mixture containing copper, iron, aluminum, and calcium silicate in which an atomic ratio of iron and aluminum to copper [(Fe+Al)/Cu] is in a range of 1.71 to 2.5, an atomic ratio of aluminum to iron [Al/Fe] is in a range of 0.001 to 3.3, and calcium silicate is contained in a range of 15% by mass to 65% by mass at a temperature in a range of 500°C to 1,000°C and a hydrogenation method in which the copper-based catalyst precursor is used are provided.