Patent ID: 7727376
Filing Date: 2010-06-01
Classification: C10G,Y02P

Abstract:
1. A process to prepare base oils from a Fischer-Tropsch synthesis product, the processing comprising (a) separating the Fischer-Tropsch synthesis product into a fraction (i) boiling in the middle distillate range and below, a heavy ends fraction (iii) and an intermediate base oil precursor fraction (ii) boiling between fraction (i) and fraction (iii); (b) subjecting the base oil precursor fraction (ii) to a first catalytic hydroisomerization and catalytic dewaxing process to yield one or more base oil grades; (c) subjecting the heavy ends fraction (iii) to a thermal cracking process to yield a fraction (iv) boiling below the heavy ends fraction (iii); and, (d) subjecting a high boiling fraction (v) of fraction (iv) to the first catalytic hydroisomerization and catalytic dewaxing process or a second catalytic hydroisomerization and catalytic dewaxing process to yield one or more base oil grades.