Waste-Derived Regenerated Diacid for Polyester Formation
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Solution Overview
Problem
Conventional polyester depolymerization processes require significant capital and time for highly purified monomer components, leading to inefficiencies in polymerization and formation.
Innovation Solution
A method involving the depolymerization of waste polyester to form a regenerated diacid and catalyst, followed by reacting the diacid with a diol to create ester bonds and polymerizing these compounds to form a polyester, potentially without additional catalysts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional depolymerization processes are used to produce highly purified monomer components, then the polyester can be formed with good properties, but significant capital and time are required for processing and downstream polymerization
Solution Approach 1:
The patent combines the depolymerization and polymerization steps into a single integrated process. The regenerated diacid and diol are reacted directly in the presence of a catalyst to form polyester, eliminating the need for separate purification and polymerization stages. This merging of operations reduces processing time while maintaining product quality.
Solution Approach 2:
The patent extracts and utilizes the catalyst generated during depolymerization for the subsequent polymerization step. Instead of discarding or requiring additional catalysts, the process recycles the catalyst from the depolymerization stage to drive the polymerization reaction, reducing material requirements and process complexity.
2Manufacturing precision
If conventional depolymerization processes are used to produce highly purified monomer components, then the polyester can be formed with good properties, but additional capital for materials and equipment is required
Solution Approach 1:
The patent combines multiple process steps (depolymerization, purification, and polymerization) into a single integrated operation. This eliminates the need for separate equipment for each stage, reducing capital requirements while maintaining the ability to produce high-quality polyester.
Solution Approach 2:
The process uses the catalyst generated during depolymerization to drive the polymerization reaction, making the system self-sufficient. This eliminates the need for additional catalyst materials and reduces equipment requirements for separate processing stages, lowering overall capital costs.
3Productivity
If conventional processes requiring additional catalysts are used, then polymerization can proceed, but process complexity and cost increase
Solution Approach 1:
The patent recovers and reuses the catalyst generated during the depolymerization step for the subsequent polymerization reaction. This eliminates the need for additional catalyst materials, simplifying the process and reducing costs while maintaining productive polymerization rates.
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 method enables more efficient and cost-effective polymerization of polyesters, maintaining properties similar to standard polyesters while reducing processing time and capital requirements.
Implementation Method 1
reacting a diol and the regenerated diacid in the regenerated composition to form one or more compounds including an ester bond
Implementation Method 2
polymerizing the one or more compounds including an ester bond to form a polyester
Data Source
AI summary
A method of forming a polyester from a regenerated composition comprising a regenerated diacid and a catalyst obtained from depolymerization of a polyester in a waste material is disclosed. The method comprises: reacting a diol and the regenerated diacid in the regenerated composition to form one or more compounds including an ester bond; optionally providing additional catalyst; and polymerizing the one or more compounds including an ester bond to form a polyester.