High-Concentration Alcohol Synthesis via Protic Solvent Mediation
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Solution Overview
Problem
Conventional alcohol production methods using metal hydride compounds result in low concentration alcohols and produce mixtures with reaction intermediates like hemiacetals and aldehydes, which are difficult to separate, and often require dilution to prevent runaway reactions.
Innovation Solution
A method involving the reaction of a compound with a metal hydride under conditions using water or a C3 or higher protic solvent, at a concentration of 1.0 mmol/g or higher, to produce a compound with specific structural substituents, allowing for high concentration and high yield alcohol synthesis without dilution, and incorporating a purifying step to remove metal compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional alcohol production methods using metal hydride compounds are used, then alcohol can be produced, but the alcohol concentration is low and the mixture contains reaction intermediates that are difficult to separate
Solution Approach 1:
The patent changes the concentration parameter by performing the reduction reaction at high substrate concentration (1.0 mmol/g or higher) without dilution, which directly addresses the low alcohol concentration problem. This parameter change also prevents the formation of difficult-to-separate intermediates by altering the reaction pathway conditions
Solution Approach 2:
The patent extracts and removes the harmful by-products and reaction intermediates through a specific purification step that eliminates metal compounds and other impurities from the reaction mixture, solving the separation difficulty problem while maintaining high alcohol concentration
2Reliability
If dilution is used to prevent runaway reactions, then reaction safety is improved, but alcohol concentration decreases and solvent amount increases
Solution Approach 1:
The patent introduces a protic solvent (water or C3 or higher alcohol) as an intermediary substance that mediates the reduction reaction. This mediator allows the reaction to proceed safely at high concentration by controlling the reaction rate and heat release, eliminating the need for dilution while maintaining safety
Solution Approach 2:
The patent changes the solvent type parameter from conventional aprotic solvents to protic solvents (water or C3+ alcohols), which fundamentally alters the reaction conditions to enable safe high-concentration reactions without dilution, thus maintaining both safety and high alcohol concentration
3Productivity
If high concentration reaction conditions are used, then alcohol production efficiency is improved, but reaction control becomes more difficult and runaway reactions may occur
Solution Approach 1:
The protic solvent acts as a heat sink and reaction mediator that controls the exothermic reduction reaction at high concentration. It absorbs excess heat and moderates the reaction rate, preventing runaway reactions while maintaining high productivity through concentrated conditions
Solution Approach 2:
The patent employs a feedback mechanism where the protic solvent continuously moderates the reaction conditions by absorbing heat and controlling the reaction rate in real-time, allowing the system to self-regulate and maintain stability at high concentration without external intervention
4Ease of operation
If conventional solvents and dilution are used, then reaction control is easier, but environmental impact and costs increase due to increased solvent amount
Solution Approach 1:
The protic solvent (water or C3+ alcohol) serves as a dual-function intermediary: it enables easy reaction control through its inherent safety properties while simultaneously reducing the total solvent amount needed compared to conventional dilute conditions, thus addressing both ease of operation and solvent reduction
Solution Approach 2:
The patent changes the concentration parameter to high levels (1.0 mmol/g or higher) while using protic solvents, which fundamentally reduces the total solvent volume required compared to conventional dilute methods, thereby reducing environmental impact and costs while maintaining operational ease
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 achieves high concentration and high yield alcohol production with reduced solvent use, minimizing environmental impact and costs, and effectively separates the alcohol from reaction intermediates.
Implementation Method 1
reacting a compound (1) and a metal hydride compound under conditions where at least one solvent selected from the group consisting of water and a C3 or higher protic solvent is present and the compound (1) is at a concentration of 1.0 mmol/g (amount of substance of compound (1)/total solvent amount) or higher to provide a compound (2)
Data Source
AI summary
A composition containing: a compound (2); a metal compound; and at least one selected from a compound (3) and a compound (4), the compound (3) being contained in an amount of 10000 ppm or less relative to the compound (2), the compound (4) being contained in an amount of 10000 ppm or less relative to the compound (2), the compound (2) being represented by the following formula (2):the compound (3) being represented by the following formula (3):and the compound (4) being represented by the following formula (4):wherein the various substituents of compounds (2), (3) and (4) are as defined herein.