Methyl Formate Carbonylation via Dual Catalyst System
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Solution Overview
Problem
Existing processes for producing methyl formate through methanol carbonylation require high pressures and costly catalyst additives, leading to high capital costs and issues with catalyst degradation and salt deposits.
Innovation Solution
A process using a catalyst system comprising alkali metal formate and alkali metal alkoxide with a molar ratio greater than 1, which is catalytically active, allowing for efficient methyl formate production at lower pressures without expensive additives and reducing salt deposits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high pressure is used to increase reaction rate, then productivity is improved, but device complexity and capital costs increase
Solution Approach 1:
The patent changes the chemical parameters of the catalyst system by introducing a dual-component system (alkali metal formate and alkali metal alkoxide) with specific molar ratios. This chemical parameter change enables the reaction to proceed efficiently at lower pressures, resolving the contradiction between productivity and device complexity.
Solution Approach 2:
The patent uses a composite catalyst system combining alkali metal formate and alkali metal alkoxide in specific proportions. This composite catalyst provides synergistic effects that enhance reaction activity and stability, allowing reduced operating pressure while maintaining high productivity.
2Productivity
If alkali metal methoxide is used as catalyst, then productivity is improved, but object-generated harmful factors increase due to catalyst degradation and salt deposits
Solution Approach 1:
The patent converts the harmful catalyst degradation product (alkali metal formate) into a beneficial component by incorporating it as part of the dual-component catalyst system. The alkali metal formate, previously considered waste, now serves as an active catalyst component that enhances stability and reduces further degradation.
Solution Approach 2:
Instead of discarding the alkali metal formate formed during catalyst degradation, the patent recovers and utilizes it as a functional catalyst component. This transforms a harmful byproduct into a valuable resource within the catalyst system.
3Productivity
If expensive catalyst additives are used to achieve acceptable space-time yield, then productivity is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive catalyst additives with a cost-effective dual-component system using readily available alkali metal formate and alkali metal alkoxide. This inexpensive catalyst combination achieves comparable or superior space-time yields without the high manufacturing costs associated with proprietary additives.
4Productivity
If temperature is increased to increase reaction rate, then productivity is improved, but equilibrium position deteriorates
Solution Approach 1:
The patent changes the catalyst system parameters from single-component alkali metal methoxide to a dual-component system with alkali metal formate and alkali metal alkoxide. This parameter change modifies the reaction kinetics and equilibrium characteristics, enabling high reaction rates at temperatures that maintain favorable equilibrium positions.
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 process achieves high space-time yields and reduces capital costs by operating at lower pressures, eliminating the need for expensive catalysts and minimizing salt-related issues, while maintaining effective methyl formate production.
Implementation Method 1
The carbonylation of methanol is a homogeneously catalyzed equilibrium reaction
Data Source
AI summary
Process for preparing methyl formate by carbonylation of methanol by means of carbon monoxide in a carbonylation reactor in the presence of a catalyst system comprising alkali metal formate and alkali metal alkoxide to give a reaction mixture (RM) which comprises methyl formate, alkali metal formate, alkali metal alkoxide and possibly unreacted methanol and unreacted carbon monoxide and is taken from the carbonylation reactor, wherein the reaction mixture (RM) comprises at least 0.5% by weight of alkali metal alkoxide based on the total weight of the reaction mixture (RM) and the molar ratio of alkali metal formate to alkali metal alkoxide in the reaction mixture (RM) is greater than 1.