Agitated Reactor Column for Continuous Latex Phase Inversion
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Solution Overview
Problem
Traditional phase inversion emulsification (PIE) processes for producing resin particles are batch-based, time and energy consuming, and scaling up results in lower surface-to-volume ratios, increasing distillation time and cost, making it inefficient for high-yield latex production for toner manufacturing.
Innovation Solution
A continuous phase inversion emulsification process using an agitated reactor column (ARC) with a flow-through design and agitator spinning coaxially with the fluid flow, allowing for high shear forces and uniform mixing, which enables efficient processing of large quantities of resin emulsion without large batch tanks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If batch mode PIE process is used, then resin particles can be produced, but production time and energy consumption increase
Solution Approach 1:
The patent applies continuous processing by feeding resin slurry and water continuously into the reactor through pumps, maintaining continuous agitation and phase inversion, and continuously removing the latex product. This eliminates the intermittent batch cycles of heating, mixing, and cooling, thereby reducing production time and energy consumption while maintaining particle quality.
2Productivity
If scale up to larger reactors is performed, then production capacity increases, but surface to volume ratio decreases resulting in greater distillation time
Solution Approach 1:
The patent segments the large-scale production into multiple smaller reactor units operating in parallel or series. Each reactor maintains a favorable surface-to-volume ratio for efficient solvent removal, while the collective system achieves high production capacity. This avoids the time penalty of distillation in single large reactors.
Solution Approach 2:
The patent transitions from horizontal scaling (single large reactor) to vertical scaling (multiple stacked or arranged reactor units). This dimensional change allows maintaining efficient surface-to-volume ratios in each unit while achieving large overall production capacity through parallel processing.
3Quantity of substance
If batch processing with large reactors is used, then large quantities can be processed, but mixing efficiency and heat transfer decrease
Solution Approach 1:
The patent divides large quantity processing into multiple smaller reactor units, each providing intense and uniform mixing through high-speed agitation. This segmentation ensures homogeneous composition in each unit while the aggregate system handles large total quantities of resin.
Solution Approach 2:
The continuous flow through multiple reactor units ensures constant mixing action and uniform heat transfer throughout the process. Material continuously passes through each stage of mixing and reaction, preventing the stagnation and composition gradients that occur in batch large reactors.
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 continuous process achieves homogenous mixing and phase inversion efficiently, reducing production time and cost, and allows for the handling of large quantities, thereby improving the economies of scale and productivity in latex production for toner manufacturing.
Implementation Method 1
adding water and the mixture to an ARC to obtain phase inversion to obtain an oil in water emulsion
Implementation Method 2
an agitator spinning coaxially with the fluid flow through the ARC
Data Source
AI summary
A process for making a latex by phase inversion emulsification in an agitated reactor column is described.