Solvent-Based Separation of Aluminized Packaging Waste
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Solution Overview
Problem
Current recycling processes for aluminized and plastified packaging fail to recover all constituents in their higher value-added form, consume excessive energy, require complex and costly operations, and often use toxic solvents, leading to environmental pollution and economic losses.
Innovation Solution
A method utilizing low-cost, non-toxic, and low-energy-consuming solvents like alkanes to dissolve and separate polymer and aluminum components from packaging waste, allowing for their recovery in reusable form, with the solvent being easily recycled and the process optimized for reduced energy consumption and lower investment costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If pyrolysis is used for energy recovery, then fuel production is achieved, but excessive energy consumption occurs
Solution Approach 1:
The patent replaces the thermal pyrolysis system with a chemical dissolution system using solvents. Instead of using high-temperature thermal energy to break down materials, the invention uses chemical solvents to selectively dissolve and separate components at ambient or mild temperatures, thereby substituting a high-energy thermal process with a low-energy chemical process
Solution Approach 2:
The invention changes the operating parameters from extreme temperatures (pyrolysis requires very high heat) to ambient or mild temperatures using chemical solvents. This parameter change from thermal to chemical domain enables the same separation function with dramatically reduced energy input
2Productivity
If toxic solvents are used for polymer recovery, then separation efficiency is improved, but environmental pollution increases
Solution Approach 1:
The patent employs conventional, readily available solvents that are less toxic and easier to handle than specialized high-performance solvents. While these solvents may require more frequent replacement or processing, their lower toxicity and environmental impact make them preferable, aligning with the principle of using simpler, safer materials that can be easily disposed of or treated
Solution Approach 2:
The invention converts the potential harm of solvent use into benefit by selecting solvents that, while requiring environmental management, enable complete material recovery and can be recycled. The solvent system is designed so that the dissolution process itself facilitates separation, and the solvent can be recovered and reused, turning a potential pollution source into a reusable resource
3Loss of substance
If complex recycling operations are implemented, then material recovery completeness is improved, but process complexity increases
Solution Approach 1:
The patent applies segmentation by using different solvents that selectively dissolve specific components of the composite packaging at different stages. Each solvent targets a particular material (polymer, aluminum, or paper), allowing systematic separation of all components through a series of simple, modular dissolution steps rather than one complex process
Solution Approach 2:
The invention uses a universal solvent system based on common chemicals that can dissolve multiple types of materials (different polymers, adhesives, coatings) through selective dissolution. This multi-functional approach allows a single solvent or solvent series to handle diverse packaging materials, simplifying the overall process while achieving complete recovery
4Ease of manufacture
If high-value materials are not insulated, then processing simplicity is improved, but material value loss increases
Solution Approach 1:
The patent extracts and isolates high-value materials (aluminum and polymers) from the composite packaging through selective dissolution of other components. By taking out these valuable materials in their original form through the solvent process, the invention maintains their full value while keeping the process relatively simple, avoiding the need for complex insulation or protective measures
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 recovers reusable-grade polymer and isolated aluminum, enabling their use in various applications while minimizing environmental impact and operational costs, achieving a lower cost/benefit ratio and complete recovery of valuable materials.
Implementation Method 1
A method utilizing low-cost, non-toxic, and low-energy-consuming solvents like alkanes to dissolve and separate polymer and aluminum components from packaging waste
Implementation Method 2
with the solvent being easily recycled
Data Source
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AI summary
The present patent refers to a process for the recycling and recovery of waste, particularly that of plastified and aluminized packaging, cartoned or not, by means of a method and equipment for extracting and separating the main components present in them for the recovery of waste, avoiding environmental pollution, recycling of waste constituents, and recovery of constituents: Plastic, aluminum and paper in their original form, with the steps A, B, C, D, E, F, G, H, I, J, L, M, O, P, Q e R, bringing advantages of obtaining reusable grade polymer; obtaining isolated aluminum; to make use of a low cost and low energy consuming solvent; to allow the pulp cellulose to be recycled in the production of paperboard for boxes, to be incorporated as part of a mechanical pulp load or even to be incorporated to the bleaching process; to have lower processing and investment costs and to have a lower cost/benefit ratio.