No abstract

No abstract

Belowi60°f. (7o°c.) there are in gasoline few naphthenic compounds and no aromatics. Up to this boiling point, gasolines are composed mainly of paraffins with the corresponding olefins. The octane number in this range is primarily dependent upon the relative amounts of the isomeric paraffins present, straight-chain compounds showing a greater tendency to knock than corresponding branched-chain compounds.

No abstract

Air oxidation of two transformer oils, differing mainly in the fact that one contained metal deactivator, was studied at 95°C in the presence and absence of metallic copper. Power factor, hydroperoxide and carbonyl oxidation intermediates, and copper contents were measured as a function of time. In the absence of metallic copper, oxidation of the two oils is quite similar. Curves of power factor and oxidation intermediates show no striking differences. There appears to be a relation between power factor and carbonyl content in these cases. In the presence of metallic copper, the oil containing metal deactivator is capable of resisting the catalytic effects of copper. The oil without deactivator is grossly degraded by <0.2 ppm soluble copper which the oil rapidly dissolves. The relation between copper content, hydroperoxide content, and power factor is discussed in terms of a proposed mechanism.