| Abstract
| - The hydrotreatment of crude wax from the dewaxing of spindle, light neutral, medium neutral, heavy neutral, and brightstock oil was studied to obtain refined paraffins that are suitable for high-grade applications. The runs were performed using an alumina-supported catalyst with 5.9 wt % of nickel (as NiO) and 16.2 wt % of tungsten (as WO3) that was used for >6000 h. The ease of treatment was ranked as follows: spindle > light neutral > medium neutral > heavy neutral ≫ brightstock. The use of high temperatures and pressures was needed to obtain a convenient reduction in the color of the heavier feedstocks. Spindle feedstock required a temperature of 548 K and a pressure of 9.81 MPa, whereas 623 K and 13.7 MPa were needed for heavy neutral feedstock to obtain refined paraffins with a Saybolt color of >+30.
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