The study deals with the application of solvent percolation technique
to separate oil from commercial microcrystalline wax flakes produced f
rom Ankelshwar tank bottom sludges. Wax deoiling has been accomplished
by percolating industrial hexane through a packed bed of the wax flak
es at ambient temperature and removing the solvent from the wax and oi
l phases to get hard wax and foots oil respectively. The resultant pro
duct wax has oil content of about 2 per cent and needle penetration va
lue of 4 at 25-degrees-C.