Hydroisomerization of wax from waxy distillate

Abstract

Fang heavy distillate containing 53.67 %wax was upgraded by a process comprising the step of deoiling and hydrotreating the wax under conditions to hydrodesulfurize by sulfur resistance catalyst containing 10 % Mo, 5 % Co and 5% Ni on alumina support and then to hydroisomerize wax by catalyst containing 0.3 % Pt and 0.5 % F on alumina support. The optimum condition for hydrodesulfurization was to operate at temperature 400 ℃ under hydrogen pressure 600 psig, concentration of MoCoNi catalyst 0.5 % by weight of wax for 8 hours, and for hydroisomerization was to operate at temperature 300 ℃ under hydrogen pressure 600 psig, concentration of Pt/F catalyst 6 % by weight of wax for 12 hours. The products from hydroisomerization process were higher value products such as colorless and high purity wax and lube base oil having viscosity index of 85 and pour ponit of -5 ℃.