Amide Production Under Low-Oxygen Nitrile Hydration
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Solution Overview
Problem
The production of amide compounds using nitrile compounds is hindered by the high toxicity, flammability, low solubility, and volatility of nitrile compounds, leading to safety risks and low productivity, with the challenge of controlling oxygen concentration to prevent ignition and polymerization not adequately addressed in existing methods.
Innovation Solution
A method involving a biocatalyst with nitrile hydratase activity that adjusts the oxygen concentration in the gas phase of the reactor to 10% by volume or less, along with specific nitrile compound concentrations, to safely produce amide compounds while maintaining high productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the concentration of nitrile compound in the reaction solution is reduced to perform reaction outside explosion range, then safety is improved, but reaction rate becomes slow and productivity decreases
Solution Approach 1:
The invention changes the parameter of oxygen concentration in the gas phase to control the explosion risk. By maintaining oxygen concentration at 10% by volume or less in the gas phase, the reaction can proceed safely even with higher nitrile compound concentrations in the liquid phase, thus resolving the contradiction between safety and productivity
Solution Approach 2:
The invention introduces nitrogen gas into the reactor to create a diluted gas phase environment. This copying of inert atmosphere allows the nitrile compound to be present at higher concentrations in the liquid phase without creating explosion conditions, enabling both high productivity and safety
2Stability of the object's composition
If oxygen concentration is increased to prevent polymerization of amide compound, then polymerization suppression is improved, but ignition risk of nitrile compound increases
Solution Approach 1:
The invention optimizes the oxygen concentration parameter in the gas phase to a specific range (10% by volume or less) that simultaneously achieves polymerization suppression and ignition risk reduction. This precise parameter control resolves the contradiction between these two opposing requirements
Solution Approach 2:
The invention creates a modified inert atmosphere by controlling the gas phase composition with limited oxygen concentration. This environment suppresses polymerization of the amide compound while preventing ignition of the nitrile compound, resolving the contradiction between stability and safety
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 approach enables safe and efficient production of amide compounds by rapidly converting nitrile compounds into amides, reducing the risk of ignition and explosion, and ensuring high productivity.
Implementation Method 1
a method for producing an amide compound from a nitrile compound using a biocatalyst having nitrile hydratase activity
Implementation Method 2
the nitrile compound is converted into the amide compound by a hydration reaction
Data Source
AI summary
A method for producing an amide compound from a nitrile compound in the presence of a biocatalyst having nitrile hydratase activity includes, at least in the presence of air, when a liquid composition of a reaction solution is such that a concentration of the nitrile compound in a gas phase portion of a reactor containing the reaction solution is in an explosion range, performing a hydration reaction under a condition that an oxygen concentration of the gas phase portion of the reactor is 10% by volume or less. The nitrile compound is, for example, preferably acrylonitrile or methacrylonitrile.