Development of a process for PCB removal from triarylphosphate hydraulic fluids by vacuum distillation

Autor:	William H Mink, James R. Longanbach
Rok vydání:	1983
Předmět:	Chromatography Vacuum distillation Chemistry General Chemistry law.invention Pilot plant law Azeotropic distillation Environmental Chemistry Hydraulic fluid Foam fractionation Foundry Distillation Filtration
Zdroj:	Environmental Science & Technology. 17:305-307
ISSN:	1520-5851 0013-936X
DOI:	10.1021/es00111a012
Popis:	A method of separating PCBs (Aroclor 1242) from a triaryl phosphate ester based hydraulic fluid that yields a fluid suitable for reuse in an aluminum die casting foundry was identified in a laboratory study. Experiments were done to determine the separation efficiency and product qualities resulting from the use of vacuum, steam, and azeotropic distillation, solvent extraction, foam fractionation, filtration, and adsorption techniques. Vacuum distillation was found to remove over 98% of the PCBs with recoveries of fluid, containing less than 50 ppm PCBs, of 90% at 5 mmHg vacuum, and 85% at 30 mmHg vacuum. The PCBs (bp 225-365/sup 0/C) were distilled from the hydraulic fluid (bp>400/sup 0/C). The product met industry standards for acid number and viscosity required for reuse. The data needed to design a 5 gallon/min pilot plant for the vacuum distillation of PCBs from hydraulic fluid in storage at an aluminum die casting foundry were also obtained.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::307d57d403cade6c3c01e82d2baa50a6 https://doi.org/10.1021/es00111a012 Zobrazit plný text záznamu