Beta-Lactone Carbonylation With CO Saturation and Low Impurities
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing carbonylation processes for producing beta-lactones are inefficient, leading to high capital costs, catalyst inefficiency, and increased impurity formation due to high temperatures, which complicates downstream processes and affects end-use approvals.
Innovation Solution
A method involving the use of a reaction mixture under partial CO pressure of 1100 psi or greater and temperatures of 90°C or greater, with gas entrainment devices to distribute CO uniformly, minimizing impurity formation and enhancing catalyst efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If higher temperatures are used to increase catalyst productivity, then reaction rate improves, but impurity formation increases
Solution Approach 1:
The patent applies parameter changes by operating at elevated temperatures (90-105°C) while simultaneously adjusting pressure parameters (CO partial pressure of 1100 psi or greater) and residence time parameters (shorter residence times) to optimize the balance between catalyst productivity and impurity formation. This multi-parameter optimization allows the system to achieve high productivity while controlling harmful byproducts through coordinated parameter adjustment rather than relying on temperature alone.
2Productivity
If continuously stirred reactors are used to continuously produce product, then productivity improves, but catalyst loading requirements increase
Solution Approach 1:
The patent implements continuous operation with controlled residence times to maintain continuous product production while optimizing catalyst utilization. The system maintains continuous flow through the reactor with controlled residence time to ensure complete reaction while preventing catalyst depletion, achieving sustained productivity without requiring excessive catalyst loading.
Solution Approach 2:
The patent changes operational parameters including CO partial pressure (1100 psi or greater), temperature (90-105°C), and residence time to optimize catalyst efficiency in continuous operation. These parameter adjustments enable the system to achieve desired productivity with reduced catalyst loading by enhancing reaction efficiency through optimized conditions rather than increasing catalyst quantity.
3Productivity
If batch reactors are used to efficiently use catalyst, then catalyst turnover number improves, but capital costs and down time increase
Solution Approach 1:
The patent transitions from batch to continuous operation, eliminating downtime between batches and maintaining continuous catalyst turnover. The continuous flow system with controlled residence time ensures uninterrupted reaction process, converting the intermittent batch operation into continuous operation that maintains high catalyst turnover number while eliminating capital costs associated with batch processing infrastructure and downtime.
4Productivity
If catalyst is continually separated, recycled and replenished to improve efficiency, then catalyst utilization improves, but process complexity and fouling increase
Solution Approach 1:
The patent employs a continuous flow system where the catalyst remains in the reaction mixture and is not separately separated or recycled. The system self-manages catalyst utilization through continuous flow and residence time control, eliminating the need for external separation and recycling equipment. This approach simplifies the process by removing complex separation membranes and recycling systems while maintaining high catalyst utilization through optimized reaction conditions.
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 method achieves high turnover numbers with low impurity levels, reducing reaction times and improving catalyst productivity while maintaining product purity.
Implementation Method 1
The reaction mixture may be subjected to process steps which distribute carbon monoxide throughout the reaction mixture. The reactor utilized for the process may include one or more devices or features which enhance the distribution of carbon monoxide throughout the reaction mixture.
Implementation Method 2
The one or more gas entrainment devices may comprise one or more of, a sparging system to sparge carbon monoxide through the reaction mixture, an entrainment impeller, a gas sparger and the like.
Implementation Method 3
contacting carbon monoxide with one or more epoxides in one or more liquid solvents in the presence of one or more carbonylation catalysts to form a reaction mixture
Implementation Method 4
reacting the reaction mixture at a temperature of 90° C. or greater under conditions such that the reaction mixture is and remains substantially saturated with carbon monoxide
Implementation Method 5
feeding gaseous carbon monoxide to the reaction mixture such that the reaction mixture is under a partial pressure of carbon monoxide of 1100 psi or greater
Data Source
AI summary
Disclosed are methods which comprise the preparation of beta-lactones which provide for shorter reaction times with lower by-product formation. The method comprises contacting carbon monoxide with an epoxide in the presence of a carbonylation catalyst to form a reaction mixture under conditions such that the carbon monoxide distributed throughout the reaction mixture and the reaction mixture is substantially saturated with carbon monoxide. The reaction conditions and reactor designs are chosen to distribute the carbon monoxide throughout the reaction mixture and to maintain the reaction mixture as substantially saturated with carbon monoxide. Under these conditions the formation of beta-lactones over the formation of by-products is favored.