Abstract: Process to prepare a base oil having a kinematic viscosity at 100° C. of greater than 6 cSt from a Fischer-Tropsch derived wax having a T10wt % recovery boiling point of above 500° C. by performing the following steps, (a) contacting a feed comprising the Fischer-Tropsch wax and between 5 and 40 wt % of a hydrocarbon diluent having a T90wt % recovery point of below 400° C. with a hydro-isomerisation catalyst under hydro-isomerisation, and (b) dewaxing the isomerised product of step (a) and isolating the base oil from the dewaxed oil obtained in step (b).

Abstract: Process to prepare a haze free base oil having a cloud point of below 0° C. and a kinematic viscosity at 100° C. of greater than 10 cSt by performing the following steps: (a) hydroisomerisation of a Fischer-Tropsch synthesis product, (b) isolating one or more fuel products and a distillation residue, (c) reducing the wax content of the residue by contacting the feed with a hydroisomerisation catalyst under hydroisomerisation conditions, and (d) solvent dewaxing the product of step (c) to obtain the haze free base oil.

Abstract: A process for the preparation of medicinal white oil or a technical white oil from a Fischer-Tropsch derived paraffinic distillate bottom product, wherein the bottom product is contacted with a heterogeneous adsorbent.