Method for selecting ester functional group-containing polymers from mixture of ester functional group-containing polymers and other types of polymers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for separating ester functional group-containing polymers from mixtures are inefficient and costly due to the difficulty in removing color-producing foreign substances, which affect the accuracy and reliability of polymer classification and recycling processes.
Innovation Solution
A method using an extractant composed of specific compounds (represented by Formulas 1 and 2) to selectively decolorize ester functional group-containing polymers by interacting with their functional groups, allowing separation by color difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional separation methods are used to classify waste polymer products, then polymer classification can be achieved, but the process becomes complex and costly due to the difficulty of removing color-producing foreign substances
Solution Approach 1:
The patent extracts and removes color-producing foreign substances (dyes and pigments) from ester functional group-containing polymers using a chemical extractant. This extraction process eliminates the interfering color substances before polymer classification, enabling accurate separation based on polymer type without the complexity of handling colored contaminants throughout the entire separation process.
Solution Approach 2:
The patent performs decolorization as a preliminary step before polymer classification. By removing color-producing substances first, the subsequent polymer separation process becomes simpler and more reliable, as the classification can be based solely on polymer properties without interference from color variations.
2Ease of manufacture
If color-producing foreign substances are not removed before depolymerization, then the process is simpler, but product characteristics are affected and recycling quality deteriorates
Solution Approach 1:
The patent extracts color-producing foreign substances using a chemical extractant before depolymerization. This removal ensures that the depolymerization process produces high-quality monomers without color contaminants, maintaining manufacturing precision while keeping the process relatively simple.
Solution Approach 2:
The patent performs decolorization as a preliminary treatment step before depolymerization. This preliminary removal of color substances prevents them from interfering with the depolymerization reaction and the quality of the resulting monomers, ensuring high recycling quality without adding excessive process complexity.
3Measurement precision
If chemical extractants are used to remove color-producing substances, then decolorization effectiveness is improved, but the cost and environmental impact increase
Solution Approach 1:
The patent optimizes the parameters of the decolorization process, including selecting appropriate extractants (such as alcohols, esters, or their mixtures), controlling temperature, and adjusting contact time. These parameter optimizations achieve effective decolorization while minimizing the use of chemical extractants and reducing associated costs and environmental impacts.
4Productivity
If waste polymer products are not classified properly, then the recycling process is faster, but environmental pollution and resource waste increase
Solution Approach 1:
The patent extracts and removes color-producing substances that interfere with polymer classification. By eliminating these interfering substances, the classification process becomes more accurate and efficient, enabling proper sorting of waste polymers for recycling. This accurate classification prevents contamination of recycled materials and reduces environmental pollution.
Solution Approach 2:
The patent performs decolorization as a preliminary step to enable accurate polymer classification. This preliminary treatment allows for faster and more reliable sorting of waste polymers by type, improving recycling productivity while ensuring that properly classified materials are sent to appropriate recycling streams, thereby reducing environmental pollution and resource waste.
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 method effectively removes color-producing foreign substances from ester functional group-containing polymers, enabling simple and economical selection and recycling by color difference, with minimal impact on other polymers and reduced waste generation.
Implementation Method 1
A method using an extractant composed of specific compounds (represented by Formulas 1 and 2) to selectively decolorize ester functional group-containing polymers by interacting with their functional groups
Data Source
AI summary
The present invention relates to a method for selecting ester functional group-containing polymers from a polymer mixture of the ester functional group-containing polymers and other types of polymers, and more particularly, to a method wherein foreign substances that only exhibit color in the ester functional group-containing polymers are removed from the polymer mixture by using an extracting agent for extracting the foreign substances and decolorized, and then the decolorized polymers are selectively separated by using the color difference with the other non-decolorized polymers.