Application of Raman spectroscopy to identification and sorting of post-consumer plastics for recycling
Abstract
A high accuracy rapid system for sorting a plurality of waste products by polymer type. The invention involves the application of Raman spectroscopy and complex identification techniques to identify and sort post-consumer plastics for recycling. The invention reads information unique to the molecular structure of the materials to be sorted to identify their chemical compositions and uses rapid high volume sorting techniques to sort them into product streams at commercially viable throughput rates. The system employs a laser diode (20) for irradiating the material sample (10), a spectrograph (50) is used to determine the Raman spectrum of the material sample (10) and a microprocessor based controller (70) is employed to identify the polymer type of the material sample (10).
- Inventors:
- Issue Date:
- Research Org.:
- National Recovery Technologies, Inc., Nashville, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 874105
- Patent Number(s):
- 6313423
- Application Number:
- 09/284,955
- Assignee:
- National Recovery Technologies, Inc. (Nashville, TN)
- Patent Classifications (CPCs):
-
B - PERFORMING OPERATIONS B07 - SEPARATING SOLIDS FROM SOLIDS B07C - POSTAL SORTING
B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29B - PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED
- DOE Contract Number:
- FG02-95ER82038
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 1999 Jul 14
- Country of Publication:
- United States
- Language:
- English
- Subject:
- application; raman; spectroscopy; identification; sorting; post-consumer; plastics; recycling; accuracy; rapid; plurality; waste; products; polymer; type; involves; complex; techniques; identify; sort; reads; information; unique; molecular; structure; materials; sorted; chemical; compositions; volume; product; streams; commercially; viable; throughput; rates; employs; laser; diode; 20; irradiating; material; sample; 10; spectrograph; 50; determine; spectrum; microprocessor; based; controller; 70; employed; laser diode; product stream; raman spectroscopy; waste product; /209/356/
Citation Formats
Sommer, Edward J., and Rich, John T. Application of Raman spectroscopy to identification and sorting of post-consumer plastics for recycling. United States: N. p., 2001.
Web.
Sommer, Edward J., & Rich, John T. Application of Raman spectroscopy to identification and sorting of post-consumer plastics for recycling. United States.
Sommer, Edward J., and Rich, John T. Mon .
"Application of Raman spectroscopy to identification and sorting of post-consumer plastics for recycling". United States. https://www.osti.gov/servlets/purl/874105.
@article{osti_874105,
title = {Application of Raman spectroscopy to identification and sorting of post-consumer plastics for recycling},
author = {Sommer, Edward J. and Rich, John T.},
abstractNote = {A high accuracy rapid system for sorting a plurality of waste products by polymer type. The invention involves the application of Raman spectroscopy and complex identification techniques to identify and sort post-consumer plastics for recycling. The invention reads information unique to the molecular structure of the materials to be sorted to identify their chemical compositions and uses rapid high volume sorting techniques to sort them into product streams at commercially viable throughput rates. The system employs a laser diode (20) for irradiating the material sample (10), a spectrograph (50) is used to determine the Raman spectrum of the material sample (10) and a microprocessor based controller (70) is employed to identify the polymer type of the material sample (10).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}