Countercurrent Sedimentors for Polymer Purification
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Solution Overview
Problem
High-performance polymer purification processes face challenges in efficiently separating polymers from high boiling temperature solvents and byproducts, leading to waste treatment issues and increased economic and environmental costs, as traditional methods are time-consuming and generate significant waste.
Innovation Solution
A method utilizing multiple sedimentors with countercurrent solvent flow and different solvent solutions to effectively separate polymers from compounds of formation, achieving high purity polymer recovery with reduced solvent usage and waste generation, and incorporating solvent recycling to enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional separation methods (heat vaporization, extraction, repeated washing) are used to separate polymer from compounds of formation, then separation can be achieved, but large quantities of waste are generated and processing time increases
Solution Approach 1:
The patent introduces a liquid solvent as an intermediary medium that facilitates the separation of compounds of formation from the polymer. The solvent selectively dissolves the compounds of formation while leaving the polymer substantially insoluble, enabling efficient separation through filtration or decantation. This intermediary approach replaces traditional methods that generate large waste volumes with a controlled solvent system that can be recovered and reused.
Solution Approach 2:
The patent implements a solvent recovery and reuse system where the liquid solvent used to dissolve compounds of formation is separated from the polymer, treated if necessary, and then reused in subsequent separation operations. This closed-loop approach minimizes waste generation while maintaining high purification levels, directly addressing the contradiction between achieving thorough separation and minimizing waste.
2Manufacturing precision
If traditional separation methods are used, then compounds of formation can be removed, but the process is time-consuming and costly
Solution Approach 1:
The liquid solvent acts as a selective intermediary that rapidly dissolves compounds of formation at controlled temperatures, significantly accelerating the separation process compared to traditional methods. The solvent's selective solubility properties allow for quick equilibration and separation, reducing processing time while achieving high purification levels through mechanisms such as filtration or decantation.
Solution Approach 2:
The patent utilizes temperature as a controllable parameter to optimize the separation process. By adjusting the temperature to enhance the solvent's selective solubility for compounds of formation while maintaining polymer insolubility, the process achieves rapid separation with high purification efficiency, thereby reducing both time and cost.
3Manufacturing precision
If heat and reduced pressure are used to vaporize volatile compounds, then separation can be achieved, but the process is costly and nonvolatile compounds remain with the polymer
Solution Approach 1:
The liquid solvent serves as a selective intermediary that dissolves both volatile and nonvolatile compounds of formation through solubility differences, eliminating the need for energy-intensive vaporization processes. This approach simplifies the manufacturing process, reduces costs, and achieves comprehensive removal of all compound types including nonvolatile residues that would otherwise remain with the polymer.
Solution Approach 2:
The patent replaces the mechanical/thermal system of heat vaporization with a chemical solubility-based separation system. Instead of using heat and reduced pressure to vaporize compounds, the process employs a liquid solvent that selectively dissolves compounds of formation based on their solubility properties, thereby eliminating the need for costly and complex thermal processing equipment while achieving superior purification.
4Manufacturing precision
If extraction with low boiling point solvent is used, then separation can be achieved, but additional solvent recovery costs are introduced
Solution Approach 1:
The patent selects a liquid solvent with appropriate boiling point and solubility characteristics to dissolve compounds of formation at elevated temperatures. By carefully controlling the temperature parameter and selecting a solvent with suitable volatility, the process achieves high purification while minimizing the energy required for solvent recovery, as the solvent can be efficiently removed through controlled evaporation or distillation without requiring excessive energy input.
Solution Approach 2:
The patent implements a solvent recovery system where the liquid solvent is separated from the polymer after dissolution of compounds of formation, then recovered through evaporation or distillation and reused. This approach minimizes energy loss by optimizing the recovery process and reducing the need for continuous fresh solvent input, thereby lowering the overall energy footprint of the purification operation.
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 approach enables the recovery of 95% or more of the initial polymer slurry as purified product, reducing operational costs and waste, while improving production rates and economic benefits through enhanced mass transfer and solvent recycling.
Implementation Method 1
One or more compounds of formation of the polymer are soluble in the first solvent, and these one or more compounds can transfer from the first slurry to the first solvent within the first sedimentor
Implementation Method 2
One or more compounds of formation of the polymer are soluble in the second solvent, and these one or more compounds can transfer from the second slurry to the second solvent within the second sedimentor
Implementation Method 3
the first slurry flows countercurrent to the first solvent within at least a portion of the first sedimentor
Data Source
AI summary
Methods, devices, and systems that can be utilized in separating a polymer from other compounds of a polymer formation process are described. The methods utilize multiple sedimentors in a countercurrent flow design in conjunction with different solvent solutions in the multiple sedimentors to separate a product polymer from other compounds of a polymer formation process. The sedimentors include feed inlets that can encourage contact between countercurrent flows and improve mass transfer rates between the countercurrent flows.