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Refining Used Lubricating Oils
book

Refining Used Lubricating Oils

by James Speight, Douglas I. Exall
April 2014
Intermediate to advanced content levelIntermediate to advanced
466 pages
17h 36m
English
CRC Press
Content preview from Refining Used Lubricating Oils
36 Refining Used Lubricating Oils
crystal structure becomes sufciently complete, the oil will no longer ow under the
conditions of the test. However, because mechanical agitation can break up the wax
structure, it is possible to have an oil ow at temperatures considerably below its
pour point. Cooling rates also affect wax crystallization; it is possible to cool an oil
rapidly to a temperature below its pour point and still have it ow.
Although the pour point of most oils is related to the crystallization of wax, cer-
tain oils, which are essentially wax-free, have viscosity-limited pour points. In these
oils, the viscosity becomes progressively higher as the temperature is lowered until
at some temperature no ow can be observed. The pour ...
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Publisher Resources

ISBN: 9781466551497