Chemical Marker Recycling for Complex Product Sorting
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Solution Overview
Problem
Recycling complex products like electronic equipment and motor cars is challenging due to their multi-part nature and the difficulty in sorting materials, especially plastics and components with rare or precious materials, which is not efficiently addressed by conventional methods like grinding and selective sorting.
Innovation Solution
A method involving a preliminary phase of material classification with chemical marker identification, followed by selective marking during production or later, grinding into particles, and spectrophotometric analysis to detect and extract specific materials using markers that emit discernible radiation, allowing for precise sorting and recycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional grinding and selective sorting methods are used, then recycling of materials can be performed, but selective sorting between various types of plastics and identification of rare/precious materials is not achieved
Solution Approach 1:
Chemical markers are incorporated into materials during the manufacturing process, enabling pre-identification of material types before recycling. This preliminary marking eliminates the need for complex analysis during recycling, as materials can be quickly identified by their unique marker signatures through spectrophotometric detection.
Solution Approach 2:
Chemical markers serve as intermediaries between the material and the detection system. These markers absorb or emit light at specific wavelengths, creating a spectral fingerprint that uniquely identifies the material type. This intermediary approach simplifies detection compared to direct material analysis.
2Extent of automation
If manual dismantling and sorting is performed, then components can be separated by material type, but the process requires cheap labour and does not lend itself to automated industrial applications
Solution Approach 1:
The manual mechanical sorting process is replaced by an automated optical detection system. Spectrophotometric sensors detect the chemical markers on materials, and automated sorting mechanisms separate materials based on their spectral signatures, eliminating the need for manual labor while dramatically increasing sorting speed and efficiency.
Solution Approach 2:
Materials effectively identify themselves through their embedded chemical markers during the recycling process. The markers automatically provide identification information when exposed to light, allowing the system to sort materials without human intervention or complex decision-making algorithms.
3Adaptability or versatility
If complex products are ground into particles, then materials can be processed, but the entire range of products cannot be covered and selective sorting is limited
Solution Approach 1:
Rather than attempting to detect bulk material properties, the system focuses on detecting the localized spectral signature of chemical markers embedded in or on the material. This local approach allows identification of trace amounts of rare materials and works across diverse material types, from plastics to metals to electronic components.
Solution Approach 2:
The chemical marker system provides a universal identification method that works across all material types. The same spectrophotometric detection principle can identify plastics, metals, glass, and electronic components, making the system universally applicable to complex products with mixed materials while maintaining sensitivity to trace quantities.
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
Enables reliable and automated recycling of diverse materials, even in small quantities, by using chemical markers that can be embedded or surface-applied, improving sorting efficiency and reducing processing power requirements, and allowing for the recycling of materials previously difficult to separate.
Implementation Method 1
the markers can consist of chemical markers which, when they are excited by incident light radiation, emit energetic radiations, the frequency spectra of which are discernable with respect to one another and with respect to the objects and substances in which they are intended to be incorporated
Data Source
AI summary
The recycling method according to the invention involves, when manufacturing the objects (12), a preliminary phase of selectively labelling the objects (12), the parts of the objects and/or the components of the objects that include the materials to be recycled, and a phase of concentrating the recyclable materials involving grinding the objects (12) down into particles (15), remotely detecting the labels that may be borne by each of the particles, extracting those parts (26) in which a label has been detected and directing them to a storage area (27) specific to said label.