Ionic Liquid Cellulose Hydrolysis via Strong Acid Catalyst
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current chemical methods for hydrolyzing cellulose to produce water-soluble monosaccharides, disaccharides, and oligosaccharides face challenges with low yields and require extreme conditions, necessitating a more efficient and mild process for high conversion to sugars.
Innovation Solution
The process involves admixing cellulose with an ionic liquid capable of dissolving at least some cellulose, followed by treatment with a strong acid in the presence of water, where the acid has a pKa less than 2, to facilitate hydrolysis under relatively mild conditions, allowing for the conversion of cellulose into water-soluble derivatives like glucose.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dilute acid treatment at high temperatures and pressures is used to hydrolyze cellulose, then the hydrolysis reaction can proceed, but the yield is low and extreme conditions are required
Solution Approach 1:
The invention changes the chemical parameters by introducing a specific catalyst system (metal salt combined with organic acid or Lewis acid) to enable hydrolysis to proceed under milder temperature and pressure conditions while achieving high conversion yields, resolving the contradiction between reaction efficiency and extreme conditions
Solution Approach 2:
The invention uses metal salts and organic acids as intermediary catalysts that facilitate the hydrolysis reaction between cellulose and water, allowing the reaction to occur at lower temperatures and pressures than conventional acid hydrolysis methods while maintaining high productivity
2Speed
If concentrated acid pre-treatment is used to hydrolyze cellulose, then the reaction can proceed rapidly, but the conversion to sugars is insufficient
Solution Approach 1:
The invention optimizes the concentration parameters of the catalyst system (metal salt combined with organic acid or Lewis acid) to achieve the optimal balance between reaction rate and sugar conversion yield, allowing rapid hydrolysis while achieving high conversion to sugars without requiring concentrated acid
Solution Approach 2:
The metal salt and organic acid act as intermediary catalysts that enhance the reaction rate while being more selective than concentrated acid, preventing side reactions and improving sugar conversion yield while maintaining rapid reaction kinetics
3Ease of manufacture
If traditional chemical hydrolysis methods are used, then the process can be simple, but the conditions required are extreme and yields are low
Solution Approach 1:
The invention introduces metal salts combined with organic acids or Lewis acids as intermediary catalysts that simplify the process conditions (reducing temperature and pressure requirements) while simultaneously improving sugar yield, achieving both ease of manufacture and high productivity
Solution Approach 2:
The invention changes the physical parameters (temperature, pressure) by using the catalyst system, making the process easier to manufacture while improving productivity through milder operating conditions that are easier to control and maintain high conversion yields
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 conversion of cellulose to water-soluble products, such as glucose, under milder conditions compared to traditional methods, enhancing the efficiency and yield of sugar production for biofuel applications.
Implementation Method 1
admixing cellulose with an ionic liquid capable of solvating or dissolving at least some of the cellulose
Implementation Method 2
treating the resulting solvate or solution with an acid in the presence of water to facilitate hydrolysis
Data Source
AI summary
A process for the preparation of water-soluble cellulose hydrolysis products, which comprises admixing cellulose with an ionic liquid in which the cellulose has at least some sollubility, said ionic liquid state at a temperature at or below 150 -C, and treating the resulting solution with an acid in the presence of water, said acid having a pKa in water of less than 2 at 25 -C.