Continuous Rectification Apparatus for Electronic-Grade Propylene Carbonate
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Solution Overview
Problem
Existing propylene carbonate production processes in rectification columns result in poor distillation efficiency and product quality due to single distillation without further purification of crude liquids.
Innovation Solution
A continuous rectification apparatus comprising a light component removal column and a heavy component removal column, with reflux tanks and pumps for repeated processing, connected through pipelines and condensing boxes to enhance separation and energy conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single distillation rectification column is used, then the device complexity is low, but the manufacturing precision (product quality) is poor
Solution Approach 1:
The rectification process is divided into two separate columns: a light component removal column for removing volatile impurities and a heavy component removal column for removing non-volatile impurities. This segmentation allows each column to specialize in removing specific types of contaminants, thereby improving overall product quality while maintaining manageable system complexity through modular design.
Solution Approach 2:
The system performs preliminary separation of light and heavy components in distinct columns before final product collection. By conducting preliminary rectification actions separately for each component type, the system achieves higher purification efficiency and better product quality without requiring a single complex multi-functional column.
2Manufacturing precision
If crude liquid is not purified again after single distillation, then the process time is short, but the manufacturing precision (product quality) is poor
Solution Approach 1:
The system implements continuous rectification where the crude liquid undergoes repeated distillation cycles through both the light component removal column and the heavy component removal column. This continuous processing ensures thorough purification without requiring additional batch operations, thereby improving product quality while minimizing time loss through uninterrupted processing.
Solution Approach 2:
Preliminary rectification is performed in the light component removal column followed by heavy component removal in the second column. This staged preliminary action removes impurities systematically in stages, achieving high product quality through sequential purification rather than requiring extended single-stage processing time.
3Manufacturing precision
If repeated reflux processing is implemented, then the manufacturing precision (product quality) is improved, but the use of energy increases
Solution Approach 1:
The energy-intensive reflux process is segmented into two separate columns, each handling specific component removal. This segmentation allows for more efficient heat transfer and condensation in each column, reducing the total energy consumption compared to a single column performing all purification functions repeatedly.
Solution Approach 2:
The system utilizes phase transitions (vaporization and condensation) efficiently in both columns to achieve repeated reflux processing. By optimizing the phase change processes in separate columns, the system achieves high product quality through repeated purification cycles while minimizing energy consumption through efficient heat exchange and condensation.
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 apparatus achieves improved accuracy and energy-efficient production of electronic-grade propylene carbonate through continuous rectification and separation, refining the product quality by repeated reflux and processing.
Implementation Method 1
The existing propylene carbonate needs to be processed in a rectification column. The existing rectification column is used for a single distillation
Implementation Method 2
A top of the light component removal column is connected to a first condensing box via a first pipeline
Data Source
AI summary
Provided is a continuous rectification apparatus for producing electronic-grade propylene carbonate, including a light component removal column and a heavy component removal column. The light component removal column is connected to a first feeding pipe. The top of the light component removal column is connected to a first condensing box. The first condensing box is connected to a first reflux tank. The first reflux tank is connected to a first conveying pump. The first conveying pump is connected to a first reflux pipe. The bottom of the light component removal column is connected to a feeding pump. The feeding pump is connected to a second feeding pipe. The second feeding pipe is connected to the heavy component removal column. The top of the heavy component removal column is connected to a second condensing box. The second condensing box is connected to one side of a second reflux tank.