Methyl Formate Production Catalyst System for Lower Pressure Operation
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Solution Overview
Problem
Existing processes for producing methyl formate through methanol carbonylation require high pressures and complex reactor designs, leading to high investment costs and issues with catalyst degradation products causing salt deposits and equipment blockages.
Innovation Solution
A process using a catalyst system with a molar ratio of alkali metal formate to alkali metal alkoxide greater than 1, preferably greater than 2, which maintains good space-time yields at lower pressures without expensive additives, and reduces salt deposit issues by utilizing a mixture of alkali metal formate and alkali metal alkoxide as catalysts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high pressure (up to 200 bar) is used to achieve acceptable space-time yield, then productivity is improved, but device complexity and investment costs increase due to specially designed reactors
Solution Approach 1:
The patent changes the chemical composition parameters of the catalyst system by incorporating alkali metal formate alongside alkali metal alkoxide. This compositional parameter change enables the reaction to proceed efficiently at lower pressures (reducing device complexity) while maintaining acceptable productivity through the synergistic catalytic effect of the formate-alkoxide system
2Productivity
If high pressure (up to 200 bar) is used to achieve acceptable space-time yield, then productivity is improved, but investment costs increase
Solution Approach 1:
The patent modifies the catalyst system composition by adding alkali metal formate, which changes the reaction kinetics parameters. This allows the process to operate at lower pressures, thereby reducing reactor design specifications and associated investment costs while maintaining productivity through enhanced catalytic activity
3Productivity
If alkali metal methoxide is used as catalyst, then catalytic activity is improved, but harmful factors increase due to formation of alkali metal formate deposits
Solution Approach 1:
The patent converts the harmful alkali metal formate deposition problem into a beneficial situation by deliberately including alkali metal formate as part of the catalyst system. The formate, instead of being a harmful contaminant to be removed, becomes a functional catalyst component that works synergistically with alkali metal alkoxide to maintain high activity while preventing deposits
Solution Approach 2:
The alkali metal formate acts as an intermediary substance that mediates between the alkali metal alkoxide catalyst and the reaction environment. It prevents the formation of harmful deposits by being present in controlled amounts as part of the catalyst system, thereby eliminating the need for complex separation and purification equipment
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 superior space-time yields and reduces equipment costs by operating at lower pressures, eliminating the need for expensive catalyst additives and minimizing salt deposits, thereby preventing reactor blockages.
Implementation Method 1
The carbonylation of methanol is a homogeneously catalyzed equilibrium reaction in which the equilibrium is shifted towards methyl formate as the partial pressure of carbon monoxide increases and the temperature decreases
Data Source
AI summary
The invention relates to a method for producing methyl formate by carbonylating methanol with carbon monoxide in a carbonylation reactor in the presence of a catalyst system containing alkali formate and alkali alcoholate, thereby obtaining a reaction mixture (RG) which contains methyl formate, alkali formate, alkali alcoholate and optionally unreacted methanol and unreacted carbon monoxide and which is removed from the carbonylation reactor. The reaction mixture (RG) contains at least 0.5 wt.% alkali alcoholate, based on the total weight of the reaction mixture (RG), and the molar ratio of alkali formate to alkali alcoholate in the reaction mixture (RG) is greater than 1.