Calcium Aluminate Pellet Catalyst for Acid-Resistant Hydrogenation
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Solution Overview
Problem
Existing catalysts for hydrogenation of carbonyl groups in organic compounds suffer from reduced mechanical stability due to the attack of acidic compounds, leading to leaching of catalytically active metals and decreased catalytic activity, necessitating the development of environmentally friendly alternatives with comparable properties.
Innovation Solution
A catalyst body comprising CuAl a Mn b Zn c O d with calcium aluminate as a binder, having a lateral compressive strength of 100-300 N, is formulated and produced through mixing, tableting, and thermal treatment, followed by reduction and stabilization to enhance mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If chromium-containing catalysts are used to improve stability against acid exposure, then mechanical stability and resistance to acidic compounds are improved, but environmental compatibility deteriorates due to stricter environmental regulations
Solution Approach 1:
The patent replaces chromium-containing catalysts with copper-based catalysts having a specific composition (CuAl a Mn b Zn c O d) and controlled physical properties (surface area 30-80 m²/g, pore volume 0.2-0.5 cm³/g, particle size 0.5-5 mm). This parameter change achieves comparable acid resistance (lateral compressive strength >50 N after acid treatment) without chromium, resolving the contradiction between reliability and environmental compatibility
Solution Approach 2:
The patent uses copper-based catalysts that can be easily replaced and are less environmentally problematic than chromium catalysts. The catalysts are designed with sufficient mechanical stability for their intended lifecycle but can be disposed of or regenerated without severe environmental consequences, addressing the environmental compatibility issue while maintaining operational reliability
2Ease of manufacture
If conventional catalysts are used without sufficient mechanical stability, then ease of manufacture is improved, but catalytic activity is reduced due to leaching of active metals under acidic conditions
Solution Approach 1:
The patent employs composite catalyst material CuAl a Mn b Zn c O d combining multiple metal oxides with specific ratios (a: 0.5-2.0, b: 0.1-0.5, c: 0.5-2.0). This composite structure provides both mechanical stability (resistance to acid-induced fragmentation) and sustained catalytic activity by preventing metal leaching, while remaining manufacturable through conventional mixing and shaping processes followed by thermal treatment
3Reliability
If catalysts with high mechanical stability are designed to resist acid attack, then reliability under harsh conditions is improved, but device complexity increases due to specific composition and processing requirements
Solution Approach 1:
The patent defines specific parameter ranges for the catalyst composition (CuAl a Mn b Zn c O d with controlled stoichiometry) and physical properties (surface area, pore volume, particle size) that optimize both mechanical stability and ease of manufacture. These parameter specifications balance reliability requirements with manufacturing simplicity, avoiding excessive complexity while achieving the desired acid resistance
Solution Approach 2:
The patent optimizes specific local properties of the catalyst: surface area (30-80 m²/g) for catalytic activity, pore volume (0.2-0.5 cm³/g) for reactant access, and particle size (0.5-5 mm) for mechanical stability. These localized quality adjustments achieve high reliability without requiring complex overall catalyst design or processing
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 exhibits improved mechanical stability and resistance to acidic compounds, maintaining high catalytic activity under harsh conditions, as evidenced by significantly higher lateral compressive strength after acid treatment compared to reference catalysts.
Implementation Method 1
calcium aluminate as a binder in a weight fraction of 0.5 to 10.0 wt.%, based on the catalyst body
Implementation Method 2
The catalyst body is produced by mixing, tableting, and thermal treatment, followed by reduction and stabilization
Implementation Method 3
followed by reduction and stabilization to enhance mechanical stability
Implementation Method 4
catalyst for the hydrogenation of carbonyl groups in organic compounds
Data Source
AI summary
The invention relates to a copper manganese-based catalyst on the basis of a tablet-form shaped catalyst body, comprising calcium aluminate as a binder, for hydrating carbonyl groups in organic compounds, characterised in that said shaped catalyst body comprises calcium aluminate in an amount of 0.5 to 20 wt.%. The invention also relates to the production of the catalyst and to the use of same in the hydration of carbonyl groups in organic compounds.