Molded Catalyst Composition for Stable Continuous Cyclic Ketone Production
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Solution Overview
Problem
Existing methods for producing isophorone using non-cyclic ketones face challenges such as complex batch processes, high costs, catalyst recovery difficulties, and insufficient mechanical strength and stability, leading to reduced catalyst life and increased by-product formation.
Innovation Solution
A catalyst molded body is produced by mixing a catalyst powder with a binder, forming a slurry, and heat-treating it to create a compressively strong body suitable for both batch and continuous processes, using oxides like magnesium and aluminum with specific molar ratios and binders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a batch process using a homogeneous catalyst is used, then isophorone can be produced, but the process becomes complicated requiring neutralization, filtration and distillation
Solution Approach 1:
The invention extracts the catalyst from the liquid phase reaction mixture and immobilizes it on a solid support material. This allows the catalyst to be easily separated from the reaction mixture by simple filtration, eliminating the need for complex neutralization and distillation steps while maintaining high isophorone production efficiency
Solution Approach 2:
The invention introduces a solid support material as an intermediary carrier for the homogeneous catalyst. This mediator allows the catalyst to function effectively while being immobilized on a solid structure, enabling easy separation and recovery, thus simplifying the overall process while maintaining productivity
2Ease of manufacture
If a solid heterogeneous catalyst is used, then the neutralization process can be omitted, but the catalyst is difficult to recover as particles become too small
Solution Approach 1:
The invention embeds small catalyst particles within a porous solid support structure, creating a nested configuration where the fine catalyst particles are trapped inside the larger support matrix. This allows easy recovery of the catalyst by simple filtration while maintaining the high surface area and activity of the fine particles
Solution Approach 2:
The solid support material acts as a flexible matrix that can accommodate and retain small catalyst particles within its porous structure. The support provides a mechanical framework that prevents particle loss during handling and recovery operations while allowing reactant and product diffusion
3Productivity
If a fixed-bed reactor with continuous process is used, then isophorone can be continuously produced, but catalysts have insufficient stability and mechanical strength
Solution Approach 1:
The invention creates a composite material consisting of the catalyst immobilized on a mechanically strong solid support. This composite structure combines the chemical activity of the catalyst with the mechanical strength and thermal stability of the support, enabling the catalyst to withstand the demanding conditions of continuous fixed-bed reactor operation
Solution Approach 2:
The solid support material provides beforehand cushioning and mechanical protection to the catalyst particles before they are subjected to the stresses of continuous operation. This pre-protection prevents catalyst fragmentation and degradation, ensuring long-term stability and reliability in continuous production processes
4Area of stationary object
If catalyst particles become too small for heterogeneous catalysis, then surface area increases, but mechanical strength becomes insufficient
Solution Approach 1:
The invention nests small high-surface-area catalyst particles within a larger solid support structure. This nested configuration preserves the high surface area of the fine particles while providing the mechanical strength of the larger support, solving the contradiction between surface area and mechanical strength
Solution Approach 2:
The invention applies different properties to different parts of the catalyst system: the fine catalyst particles provide high surface area and chemical activity in the interior pores, while the outer solid support provides mechanical strength and structural integrity. This local differentiation of properties resolves the contradiction between surface area and strength
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 molded body achieves improved mechanical strength and stability, reducing by-products and energy consumption, extending operation time, and enhancing the yield of cyclic ketone production.
Implementation Method 1
obtaining a catalyst molded body by molding and heat-treating the slurry
Data Source
AI summary
A catalyst molded body, a production method thereof and a method for preparing cyclic ketone using the same, including: (a) producing a mixed powder including a catalyst powder and a binder; (b) producing a slurry by mixing an aqueous alkali hydroxide solution with the mixed powder; and obtaining a catalyst molded body by molding and heat-treating the slurry.