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Recycling and Propylene Glycol Engine Coolant
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English
Abstract
Increasing use of propylene glycol (PG) in engine coolant applications raises technical issues related to antifreeze recycling. This paper reports the results of experiments which demonstrate that propylene glycol is compatible with present-technology systems. Examples of the performance of two widely approved antifreeze purification techniques on waste coolant containing propylene glycol are provided. In addition, results on reinhibition of the effluents from these two processes are reviewed. Finally, a simple method for compositional and freezing point determinations of commingled (ethylene glycol (EG) and PG)/water mixtures is described.
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Authors
Topic
Citation
Schwartz, S., "Recycling and Propylene Glycol Engine Coolant," SAE Technical Paper 960638, 1996, https://doi.org/10.4271/960638.Also In
References
- Dealer Service Information Bulletin No. 93-1-18 Cadillac Motor Car Division, General Motors Corp. January 1993
- Claunch, C. K. “Distillation Recovery of Ethylene Glycol from Used Coolants Using Vacuum Distillation” SAE Paper 921637 SAE September 1992
- Wiebe, R.D. Dick, J. M. “Heavy-Duty Coolant Regeneration by Dual-Resin Deionization” SAE Paper 921636 SAE September 1992
- ARCO Internal Information
- Hemmes, P.R. Kreiser, T.H. Valle, S. Hercamp, R.D. “Test Strips for Rapid On-Site Analysis of Engine Coolants” ASTM Publication Code Number 04-011920-15, Engine Coolant Testing: Third Volume 168 1993
- Curme, G. O. Johnston, F. Glycols, Reinhold Publishing Corp. 1952