Patent ID: 8394256

Claim:
A method for reducing/mitigating waxy haze formation at a target haze disappearance temperature in base stocks susceptible to haze formation by filtering haze producing wax out of the base stock, said method comprising incubating the base stock for a time and at a temperature sufficient for haze wax particles to form and filtering the haze base stock through a filter material having a total material surface area of at least 0.5 m 2 /g to up to 100 m 2 /g accessible to the wax particles and pores of from 0.2 to 50 microns wherein the hazy wax is removed from the base stock and is trapped by the filter and recovering the dehazed base stock as filtrate wherein said recovered dehazed base stock remains haze-free at the target haze disappearance temperature for at least fourteen days, and wherein non-waxy particulate material is removed from the base stock before the base stock is filtered to remove the wax.