Copper-Based Catalyst for 7-Octenal Isomerization
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Solution Overview
Problem
The existing methods for producing 7-octenal through the isomerization of 2,7-octadiene-1-ol using copper-based catalysts result in low conversion ratios and selectivity, with difficulties in separating the target substance 7-octenal from byproducts, particularly 2,7-octadienal.
Innovation Solution
A copper-based catalyst is obtained by calcining a mixture containing copper, iron, aluminum, and calcium silicate with specific atomic ratios and calcination temperatures, and using calcium silicate in the range of 15% to 65% by mass, which improves the conversion ratio and selectivity of 7-octenal in the isomerization reaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a copper-based catalyst is used for isomerization of 2,7-octadiene-1-ol, then 7-octenal can be produced, but the conversion ratio and selectivity are low
Solution Approach 1:
The patent applies parameter changes by optimizing the atomic ratios of metals (Cu:Fe:Al = 1:0.5:0.5), calcination temperature (600-800°C), and calcium silicate content (15-65% by mass) to achieve high conversion ratio (90% or more) and selectivity (95% or more) for 7-octenal production
Solution Approach 2:
The patent uses a composite catalyst material consisting of copper, iron, aluminum, and calcium silicate. The calcium silicate serves as a carrier that supports the metal components, creating a composite structure that enhances both conversion ratio and selectivity compared to simple copper-based catalysts
2Productivity
If conventional copper-based catalysts are used, then isomerization reaction can proceed, but separation of 7-octenal from byproducts is difficult
Solution Approach 1:
By changing the catalyst composition parameters (adding calcium silicate and optimizing metal ratios), the reaction produces 7-octenal with 95% or more selectivity, which simplifies separation from byproducts and improves overall production efficiency
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 method achieves a high conversion ratio and selectivity for 7-octenal, enabling its efficient production through the isomerization of 2,7-octadiene-1-ol, with improved separation from byproducts.
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.
Implementation Method 3
an isomerization reaction of 2,7-octadiene-1-ol is caused in a gas phase using a fixed-bed reaction method in the presence of the obtained copper-based catalyst
Data Source
AI summary
Provided is a method for highly selectively producing 7-octenal with a high conversion ratio through the isomerization reaction of 2,7-octadiene-1-ol. Specifically, provided is a method for producing 7-octenal, in which a copper-based catalyst is obtained by reducing a copper-based catalyst precursor described below, and an isomerization reaction of 2,7-octadiene-1-ol is caused in a gas phase using a fixed-bed reaction in the presence of the obtained copper-based catalyst. The copper-based catalyst precursor: 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.