Characterization of Used MIL-L-7808 Lubricants.
Final rept. 1 May 81-31 Dec 84,
DALTON AND CO (SYNTHETIC PRODUCTS) LTD BELPER (ENGLAND)
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The objectives of this effort were 1 development of a minimum quality specification for acceptance of used MIL-L-7808 lubricants for reprocessing by the Dalton process and 2 assessing the proportion of reclaimable lubricant from samples collected from a wide distribution of USAF bases where no special precautions were taken to exclude contamination outside the engine environment. Based upon Dalton experience, a minimum quality specification was established and inspection techniques were defined. Seventy-one 71 five-gallon samples of used lubricant were provided Dalton for the assessment of reclaimability. Of the samples received, 19.7 percent were reported as being unsuitable for reprocessing during the laboratory screening process. Details of the screening process along with a proposed used oil specification are presented. It was concluded that the foaming requirements in specification MIL-L-7808 would be the most likely factor which will influence the proportion of used lubricant which can be reclaimed by the Dalton technology. Yield for this batch of material was 80 percent of feedstock which is significantly lower than the 95 percent achieved during the previous program. This lower yield is probably due to the method of sampling and points out the need for special segregation and handling procedures if reprocessing is to economically practical. Author
- Lubricants and Hydraulic Fluids