2-Methyl THF Extraction of Levulinic Acid From Acidic Brine
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Solution Overview
Problem
Current processes for extracting levulinic acid and formic acid from biomass conversion byproducts face challenges such as low yield, high capital costs, and reactor fouling due to high temperature conditions, making them commercially unviable.
Innovation Solution
A process using 2-methyl tetrahydrofuran as a solvent for liquid-liquid extraction under ambient conditions to separate levulinic acid and formic acid from calcium chloride brine solutions, employing countercurrent extraction in separation columns followed by distillation to achieve high recovery and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high temperature reaction conditions are used for levulinic acid production, then reaction rate is improved, but reactor fouling increases and yield decreases
Solution Approach 1:
The invention changes the temperature parameter from high temperature to ambient temperature conditions. This parameter change resolves the contradiction by maintaining adequate reaction rate through alternative means (ambient conditions with appropriate catalysts) while eliminating the harmful fouling effects associated with high temperature operation.
Solution Approach 2:
The invention replaces thermal energy input (high temperature) with chemical catalysis to drive the reaction. This substitution allows the reaction to proceed at ambient temperature, eliminating reactor fouling while maintaining reaction rate through catalytic activity rather than thermal energy.
2Speed
If high temperature reaction conditions are used for levulinic acid production, then reaction rate is improved, but yield decreases
Solution Approach 1:
The invention changes the temperature parameter from high to ambient, and simultaneously optimizes other parameters such as catalyst selection and reaction time. This multi-parameter optimization resolves the contradiction by achieving adequate reaction rates through catalysis while improving yield through milder, more selective reaction conditions.
Solution Approach 2:
The invention substitutes thermal driving force with catalytic driving force. This substitution enables the reaction to proceed at ambient temperature with improved selectivity and yield, while catalytic activity maintains the necessary reaction rate without the detrimental effects of high temperature.
3Reliability
If specialized equipment to withstand hydrolysis conditions is used, then reaction reliability is improved, but capital cost increases
Solution Approach 1:
The invention changes the operating temperature parameter from high to ambient conditions. This parameter change resolves the contradiction by eliminating the need for specialized high-temperature equipment, thereby reducing capital costs while maintaining reaction reliability through optimized catalytic processes and ambient-condition-appropriate materials.
4Manufacturing precision
If current separation processes are used for levulinic acid, then separation capability is improved, but yield decreases and capital cost increases
Solution Approach 1:
The invention changes the extraction parameters by using 2-methyl THF as the solvent and operating at ambient temperature. This resolves the contradiction by achieving effective separation through optimized solvent selection and extraction conditions, thereby improving yield while avoiding the high capital costs associated with conventional high-temperature separation 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
The process achieves high recovery rates of 70-99.5% for levulinic acid and efficient separation of formic acid, reducing capital costs and preventing reactor fouling, thus enhancing commercial viability.
Implementation Method 1
A process using 2-methyl tetrahydrofuran as a solvent for liquid-liquid extraction under ambient conditions to separate levulinic acid and formic acid from calcium chloride brine solutions
Implementation Method 2
employing countercurrent extraction in separation columns followed by distillation to achieve high recovery and purity
Data Source
AI summary
Levulinic acid and formic acid are valuable chemical intermediaries present in byproducts of some biomass conversion processes. Described herein are commercially viable processes for extracting levulinic acid and formic acid at high recovery. Under the present approach, levulinic acid and formic acid may be extracted from an aqueous reactor product, such as an acidic brine (e.g., calcium chloride brine) feed from a biomass hydrolysis reaction. If present, mineral acid catalysts may be recovered. Embodiments use solvents such as, e.g., 2-methyl tetrahydrofuran, for extracting levulinic acid and formic acid from the aqueous solution.