Vacuum Distillation System for High Purity Ethanol
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current ethanol distillation facilities consume large amounts of energy and have a low coefficient of performance (CoP), making it inefficient to purify ethanol to high purity levels required for pharmaceutical, beverage, and laboratory industries without significant energy expenditure.
Innovation Solution
A multi-section, vacuum-operated distillation system that includes three distillation sections: a prefractionation section to split heavy and light impurities, and two finishing sections to further purify the ethanol, controlled by an algorithm that adjusts tower operations to achieve the target quality of purified ethanol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional distillation techniques are used to purify ethanol, then ethanol concentration can be increased to approximately 95 wt%, but significant energy is consumed and water cannot be completely removed due to the ethanol/water azeotrope
Solution Approach 1:
The patent changes the operating parameters of the distillation process by implementing vacuum conditions and controlled reflux ratios. The system operates at reduced pressure to alter the boiling points and azeotropic composition, enabling purification beyond 95% ethanol concentration while managing energy consumption through optimized operational parameters rather than brute-force heating
Solution Approach 2:
The distillation process is divided into multiple sections including a prefractionation section and finishing sections. This segmentation allows different parts of the column to handle different separation tasks - the prefractionation section removes bulk impurities while the finishing sections achieve high purity ethanol, distributing energy consumption across stages rather than requiring extreme energy input at a single stage
2Manufacturing precision
If multiple sequential distillations are performed to remove fermentation impurities, then impurity levels can be reduced, but energy consumption increases significantly
Solution Approach 1:
The patent merges multiple distillation functions into a single integrated system with prefractionation and finishing sections operating in sequence within one column structure. This combined approach achieves the impurity removal effectiveness of multiple separate distillations while avoiding the cumulative energy penalty of running multiple independent distillation units, as heat integration and vapor reuse are facilitated by the unified design
Solution Approach 2:
The system maintains continuous operation with vapor and liquid flows moving continuously through the prefractionation and finishing sections. The continuous circulation of reflux and the steady-state operation eliminate the energy losses associated with batch-wise sequential distillations, maintaining useful thermal action throughout the process without interruption or repeated heating cycles
3Manufacturing precision
If extractive distillation techniques are used to achieve impurity levels below 1 ppm, then purification precision is improved, but both energy and capital investment increase significantly
Solution Approach 1:
The patent extracts and removes specific impurity fractions at different stages of the distillation process. The prefractionation section extracts heavy and light ends separately, while the finishing sections extract remaining impurities to achieve sub-ppm purity. This selective extraction approach avoids the need for complex extractive distillation with additional solvents or chemicals, achieving high purity through careful fractionation alone
Solution Approach 2:
The system employs dynamic control of operational parameters including vacuum level, reflux ratio, and feed rate to optimize separation efficiency at each stage. This dynamic adjustment allows the process to adapt to varying feed compositions and achieve consistent sub-ppm purity without requiring fixed, overly complex equipment configurations, maintaining flexibility while achieving high precision
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 system achieves high-purity ethanol with impurity levels less than 10 ppm, reducing energy consumption and improving the CoP, making it suitable for use in pharmaceutical, beverage, and laboratory industries while being environmentally friendly.
Implementation Method 1
A multi-section, vacuum-operated distillation system that includes three distillation sections: a prefractionation section to split heavy and light impurities, and two finishing sections to further purify the ethanol
Implementation Method 2
A multi-section, vacuum-operated distillation system that includes three distillation sections
Data Source
AI summary
Chemical purification apparatus(es), system(s), and/or method(s) include the use of two towers and/or columns. The apparatus(es), system(s), and/or method(s) can be vacuum-operated and can be used to purify ethanol. The apparatus(es), system(s), and/or method(s) are capable of receiving crude ethanol and refining said crude ethanol until it is essentially pure and suitable for use in the pharmaceutical, beverage, and laboratory industries. Such crude ethanol can originate from petrochemical and/or agricultural sources. The apparatus(es), system(s), and/or method(s) are capable of producing practically pure ethanol at a high quality with low energy consumption per unit volume.