Properties of Base Stocks Obtained from Used Engine Oils by Acid/Clay Re-refining (Proprietes des Stocks de Base Obtenus par Regeneration des Huiles a Moteur Usees par le Procede de Traitement a l'Acide et a la Terre)

摘要

Owing to limited laboratory facilities of Canadian re-refineries, the NRC Fuels and Lubricants Laboratory has providing a service to re-refiners by evaluating in the laboratory their products, including feedstocks, base stocks (or base oils) and finished lubricating oils. This service has been available since 1967. In recent years it has been extended to oil reclaimers generally so that reclaimed industrial, and hydraulic oils have been examined as well (Refs. 1 and 2). Regrettably, because of other commitments and absence of some equipment the evaluations have not been as thorough as desirable. For example, except for standard single cylinder engine tests on a number of re-refined engine oils in the late sixties, rig and field tests on finished products have not been done. Nevertheless , it is believed, that the tests that have been carried out have been valuable. Individual reports showing the test results were sent to respective re-refiners whose oils were tested. Principally, re-refined oils obtained by the conventional acid/clay process (Appendix A) and samples sent by the re-refiner to the Fuels and Lubricants Laboratory were tested. However, a number of experimental base stock oils were examined from Canadian experiments employing a variety of processes including vacuum distillation, hydro-treatment, solvents and chemicals. (Author)