Coalescing Filter Purification of Epoxidized Ester Plasticizers
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Solution Overview
Problem
Current methods for purifying epoxidized ester plasticizers are cumbersome and costly, often requiring high temperatures, large volumes of water, and multiple washing steps, which can lead to heat-related defects and generate waste, while also being inefficient in removing metal ions and other impurities that affect the electrical properties and stability of PVC plastics.
Innovation Solution
A continuous purification process using a coalescer to remove ions, metals, and alcohol impurities from epoxidized ester plasticizers at room temperature, eliminating the need for heat, vacuum, extraction/washing steps, and phase separation, resulting in a purified plasticizer with reduced impurity content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional washing and extraction methods are used to purify plasticizers, then impurity removal is achieved, but the process becomes cumbersome and costly with heat-related defects and waste generation
Solution Approach 1:
The invention extracts and removes impurities (metal ions, alcohol, water) from the plasticizer composition through a simplified purification process that eliminates the need for complex multiple washing and extraction steps, achieving high purity while reducing process complexity
Solution Approach 2:
The invention changes the parameters of the purification process by conducting it at room temperature instead of high temperatures, and uses a single-step method instead of multiple steps, thereby simplifying the process while maintaining or improving purification effectiveness
2Manufacturing precision
If high temperatures and multiple washing steps are used, then purification is achieved, but heat-related defects occur and waste is generated
Solution Approach 1:
The invention converts the harmful effect of heat by eliminating the need for high temperature processing, achieving purification at room temperature and thereby preventing heat-related defects and waste generation while maintaining purification effectiveness
Solution Approach 2:
The invention extracts and removes impurities (metal ions, alcohol, water) from the plasticizer composition through a simplified purification process that eliminates the need for complex multiple washing and extraction steps, achieving high purity while reducing process complexity
3Manufacturing precision
If traditional purification methods are used, then some impurities are removed, but metal ions and other impurities affecting electrical properties remain
Solution Approach 1:
The invention extracts and removes impurities (metal ions, alcohol, water) from the plasticizer composition through a simplified purification process, achieving high purity that improves the electrical properties and stability of PVC plastics
Solution Approach 2:
The invention uses ion-selective electrodes to monitor and measure metal ion concentrations during the purification process, providing real-time feedback that enables precise control and ensures thorough removal of impurities affecting electrical properties
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 effectively reduces metal and ion impurities to below detection limits, significantly improving the purity and stability of the plasticizers, enhancing the electrical properties and sustainability of PVC plastics without causing heat-related defects.
Implementation Method 1
contacting a plasticizer composition containing at least one impurity selected from the group consisting of metal ions, alcohol, and water with a coalescing filter to effect phase separation into a phase enriched in impurities and a purified plasticizer effluent phase
Data Source
AI summary
Plasticizers are purified by contact with a coalescing filter to effect removal of ions, metals, monohydric alcohols, and polyhydric alcohols. The resulting purified plasticizer compositions are suitable for use in PVC due to their low levels of impurities that reduce PVC utility.