The vacuum distillate (375-500-degrees-C) of Bombay high crude oil is
highly waxy in nature and exhibits non-NeWtonian flow at fairly high t
emperature. Waxes have been separated from this broad fraction and its
narrow 25-degrees-C cuts by solvent dewaxing. Changes in the rheologi
cal properties of these fractions after removal of waxes have been det
ermined. The dewaxed fractions have much lower pour point and wider Ne
wtonian flow range compared to the whole fractions. The influence of s
eparated wax at different concentration, on the cold flow properties o
f dewaxed oil derived from the broad fraction has also been determined
.