Composite Metal Catalyst for 1,4-Cyclohexanedimethanol Synthesis
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Solution Overview
Problem
Conventional methods for preparing 1,4-cyclohexanedimethanol are inefficient, requiring additional processes for by-product removal and catalyst recovery, leading to low purity and high production costs, with existing catalysts being difficult to commercialize and environmentally problematic.
Innovation Solution
A composite metal catalyst composition comprising a palladium (Pd) compound, ruthenium (Ru) compound, tin (Sn) compound, and platinum (Pt) compound is used to convert terephthalic acid to 1,4-cyclohexanedimethanol in a single reactor, simplifying the process and minimizing by-products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to prepare 1,4-cyclohexanedimethanol through multiple steps, then the reaction can be completed, but additional processes are required for by-product removal and catalyst recovery, increasing process complexity and cost
Solution Approach 1:
The patent combines multiple reaction steps (hydrogenation of terephthalic acid to cyclohexanedicarboxylic acid, followed by reduction to 1,4-cyclohexanedimethanol) into a single reaction step using a composite catalyst system. This merging eliminates the need for separate by-product removal and catalyst recovery processes, directly resolving the contradiction between ease of manufacture and device complexity.
Solution Approach 2:
The patent employs a composite metal catalyst composition containing multiple metal compounds (palladium, ruthenium, tin, and platinum compounds) that enables both hydrogenation and reduction reactions to occur simultaneously in one step. This composite catalyst material allows the process to be simplified without sacrificing reaction efficiency, addressing the process complexity issue.
2Manufacturing precision
If conventional catalysts are used, then the reaction can proceed, but by-products are generated requiring separation processes, reducing product purity
Solution Approach 1:
The composite metal catalyst composition with specifically controlled ratios of Pd (0.1-10 wt%), Ru (0.1-5 wt%), Sn (0.1-5 wt%), and Pt (0.1-5 wt%) compounds enables high-selectivity hydrogenation and reduction reactions, minimizing by-product formation. This composite material approach directly improves product purity while reducing harmful by-products.
Solution Approach 2:
The patent optimizes reaction parameters including temperature (50-200°C), pressure (1-100 atm), and catalyst composition ratios to achieve high selectivity for the desired product. By carefully controlling these parameters, the reaction produces minimal by-products, directly addressing the contradiction between manufacturing precision and object-generated harmful factors.
3Ease of manufacture
If existing catalysts are used, then the reaction can be performed, but the catalysts are difficult to commercialize and require environmental processing
Solution Approach 1:
The patent designs a catalyst system where the solid catalyst can be easily separated from the reaction mixture by filtration and reused multiple times. The catalyst maintains its activity over multiple cycles, reducing waste and environmental impact while improving commercialization feasibility through cost-effective catalyst utilization.
Solution Approach 2:
The patent uses base metal compounds (Ru, Sn, Pt) in combination with Pd that are more environmentally friendly and cost-effective than traditional precious metal catalysts. The catalyst system is designed for single-use or limited reuse applications where ease of disposal and environmental compliance are prioritized over extended catalyst lifetime.
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 significantly reduces production time and costs by achieving high purity 1,4-cyclohexanedimethanol in a single step, minimizing by-products, and allowing for catalyst reuse, thereby enhancing economic efficiency and simplifying the reaction process.
Implementation Method 1
A composite metal catalyst composition comprising a palladium (Pd) compound, ruthenium (Ru) compound, tin (Sn) compound, and platinum (Pt) compound is used to convert terephthalic acid to 1,4-cyclohexanedimethanol
Implementation Method 2
The present invention relates to a composite metal catalyst composition, and a method and an apparatus for preparing 1,4-cyclohexanedimethanol using the same
Data Source
AI summary
Disclosed are a composite metal catalyst composition capable of increasing efficiency and economic feasibility of a reaction through simplification of a reaction process, and providing 1,4-cyclohexanedimethanol with high purity for a shorter time while minimizing byproducts; and a method and apparatus for preparing 1,4-cyclohexanedimethanol with high purity using the same. The present invention provides a composite metal catalyst composition for converting an aromatic dicarboxylic acid into an alicyclic diol compound, the composition containing: a first metal catalyst including a palladium (Pd) compound; and a second metal catalyst including a ruthenium (Ru) compound, a tin (Sn) compound, and a platinum (Pt) compound, and a method and apparatus for preparing 1,4-cyclohexanedimethanol using the same.