ABSTRACT
Catalytic dewaxing is a particular hydrocracking process used to improve cold flow properties of middle distillates and lubricants by cracking normal and nearnormal paraffins. Dewaxing is not always achieved by cracking; this can also be accomplished by isomerization as done by Chevron's Isodewaxing process. The properties targeted for improvement are pour point and viscosity of middle distillates and lubricants, cloud point of diesel fuel, and freeze point of jet fuel. The properties listed become important, especially at low temperatures.
