Oxidation of Lubricating Oils

Oxidation of Lubricating Oils.

“…Thus, formic, acetic, and propionic acids would be expected in order of decreasing concentration. Fenske et al (19,20) actually found this to be the case in an analysis of the volatile products resulting from the oxidation of a lubricating oil at temperatures of 130-180°C. George, Rideal, and Robertson (22) found that Gis and C26 paraffins and alkylbenzenes are oxidized at 100-120°C.…”

Oxidation Characteristics of Lubricating Oils at High Temperatures

“…The advantages of continuous oxygen-absorption measurements have been amply discussed (3,4,8,10). Suffice it to say that they provide the most precise and unequivocal criterion of over-all deterioration.…”

“…ĉal./0 K./mole. 4 Not absolute values (see text). 9 The square of the actual (5°) coefficient (to convert from a 5°to a 10°basis).…”

Laboratory Evaluation of Oil Deterioration

“…Eh Eh carried out both on pure hydrocarbons (28) and on oils (17), but additional study has led to the conclusion that this approach is not worth while on a routine basis. Thus, oils vary surprisingly little in the direction in which oxidation proceeds, with the exception of the solubility of the oxidation products.…”