Liquid Phase Oxidation of Isobutylene for 1,3-Bisacyloxy-2-Methylenepropane
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Solution Overview
Problem
Existing methods for producing 1,3-bisacyloxy-2-methylenepropane without inorganic by-products are inefficient and costly due to gas phase reactions, which require high energy consumption and result in low substrate conversion, necessitating a more efficient production method.
Innovation Solution
A liquid phase oxidative reaction of isobutylene and carboxylic acid using a catalyst with palladium and a transition metal from Group 11, such as copper or gold, to produce 1,3-bisacyloxy-2-methylenepropane, reducing energy costs and equipment requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If gas phase reaction is used to produce 1,3-bisacyloxy-2-methylenepropane without inorganic by-products, then environmental load is reduced, but production efficiency is low and energy consumption is high
Solution Approach 1:
The invention changes the reaction phase from gas phase to liquid phase, which fundamentally alters the reaction conditions and kinetics. This parameter change enables higher substrate conversion (90% or more) while maintaining the environmental benefit of no inorganic by-product generation, thereby resolving the contradiction between environmental protection and production efficiency
Solution Approach 2:
The invention utilizes phase transition by conducting the reaction in liquid phase instead of gas phase. This phase change allows for better heat transfer, higher reactant concentration, and improved catalyst utilization, resulting in significantly enhanced production efficiency while continuing to avoid inorganic by-product formation
2Object-affected harmful factors
If gas phase reaction is used, then inorganic by-products are avoided, but energy consumption increases due to vaporization requirements
Solution Approach 1:
The invention changes the reaction phase from gas to liquid, eliminating the need for continuous vaporization of reactants. This parameter change dramatically reduces energy consumption while maintaining the advantage of no inorganic by-product generation, as liquid phase reactions proceed at lower temperatures without requiring phase change energy
3Object-affected harmful factors
If gas phase reaction is used, then inorganic by-products are avoided, but equipment cost and complexity increase
Solution Approach 1:
The invention simplifies the equipment requirements by changing from gas phase to liquid phase reaction. This eliminates the need for vaporizers, gas flow control systems, and specialized gas handling equipment, thereby reducing device complexity and cost while continuing to avoid inorganic by-product formation
4Object-affected harmful factors
If gas phase reaction is used, then inorganic by-products are avoided, but substrate conversion is low
Solution Approach 1:
The invention achieves high substrate conversion (90% or more) by transitioning to liquid phase reaction, where reactants can be maintained at higher concentrations and have longer residence times. This parameter change dramatically improves substrate utilization while maintaining the environmental benefit of no inorganic by-product generation
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 enhances production efficiency and reduces costs by eliminating inorganic by-products and improving catalyst stability, achieving high conversion and selectivity of 1,3-bisacyloxy-2-methylenepropane without the formation of inorganic by-products in equimolar amounts.
Implementation Method 1
reacting isobutylene and a carboxylic acid and oxygen in the presence of a catalyst
Implementation Method 2
reacting isobutylene and a carboxylic acid and oxygen in a liquid phase
Data Source
AI summary
A method for producing a 1,3-bisacyloxy-2-methylenepropane represented by the following general formula (II), including reacting a carboxylic acid represented by the following general formula (I), isobutylene, and oxygen, in a liquid phase, in the presence of a catalyst containing a carrier having carried thereon palladium and a transition metal of Group 11 in the periodic table, and a catalyst activator.