Organic Solvent Purification via Side Discharge Distillation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing purification processes for organic solvents, such as those used in semiconductor processes, fail to efficiently remove impurities like acetone and metal ions, leading to substrate contamination, process failures, and reduced cleaning power.
Innovation Solution
A purification process that involves continuously discharging a portion of the organic solvent including impurities through a side discharge stream connected to the lower part of a distillation column, at a flow rate of 0.5% to 10% of the input flow rate, to efficiently remove organic impurities and metal impurities, and storing the purified solvent at a temperature of 30° C. or lower to prevent regeneration of impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional distillation process is used to purify organic solvent, then the purification process is simple, but organic impurities such as acetone and metal impurities are not sufficiently removed
Solution Approach 1:
The distillation column is divided into multiple sections with different functions: a lower section for removing high-boiling impurities via side discharge stream, an upper section for removing low-boiling impurities via overhead discharge, and a middle section for main distillation. This segmentation allows each section to target specific impurities, achieving comprehensive purification with controlled complexity
Solution Approach 2:
A side discharge stream is introduced as an intermediary component connecting the lower part of the distillation column to the discharge system. This intermediary enables selective removal of high-boiling organic impurities and metal impurities that accumulate in the lower section, without requiring complete redesign of the entire distillation system
2Reliability
If purified organic solvent is stored at room temperature, then storage conditions are simple, but impurities such as acetone are regenerated during storage
Solution Approach 1:
The storage temperature parameter is changed from room temperature to a controlled low temperature range (0-30°C). This parameter change suppresses the regeneration reactions of impurities like acetone during storage, maintaining the high purity achieved during distillation. The energy cost is minimized by using passive cooling or efficient refrigeration systems
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 process significantly improves the purity of the organic solvent by effectively controlling organic impurities such as N-propyl alcohol and metal impurities, while preventing the regeneration of acetone during storage, thus ensuring a high-purity solvent with reliable performance.
Implementation Method 1
performing distillation by supplying an organic solvent to a distillation column
Implementation Method 2
discharging impurities having relatively high boiling points at a certain flow rate together with a portion of an organic solvent through a side discharge stream
Data Source
AI summary
The present disclosure relates to a purification process of an organic solvent, the process including: (a) performing distillation by supplying an organic solvent to a distillation column; and (b) discharging a portion of the organic solvent including impurities through a side discharge stream connected to a lower part of the distillation column, wherein the discharging of (b) discharges a portion of the organic solvent including impurities at a flow rate of 0.5% to 10% with respect to an input flow rate of the organic solvent supplied to the distillation column in (a).