Showing papers by "David John Wedlock published in 2003"
Patent•
25 Jun 2003TL;DR: In this paper, a process to prepare a heavy and a light base oil from a partly isomerized Fischer-Tropsch derived feedstock, the feedstock having an initial boiling point of below 400° C and a final boiling point above 600° C, was described.
Abstract: The invention relates to a process to prepare a heavy and a light lubricating base oil from a partly isomerized Fischer-Tropsch derived feedstock, the feedstock having an initial boiling point of below 400° C. and a final boiling point of above 600° C. by (a) separating the fraction via distillation into a light base oil precursor fraction and a heavy base oil precursor fraction; (b) reducing the pour point of each separate base oil precursor fraction via dewaxing; and, (c) isolating the desired base oil products from the dewaxed oil fractions as obtained in step (b).
23 citations
Patent•
25 Jun 2003TL;DR: In this article, a kinematic viscosity at 100 °C of above 15 cSt, a pour point of below +10 °C and a visosity index of between 140 and 200 and no visosity modifier was used as motor engine lubricant.
Abstract: The invention is directed to a lubricant formulation comprising a base oil having a kinematic viscosity at 100 °C of above 15 cSt, a pour point of below +10 °C and a viscosity index of between 140 and 200 and no viscosity modifier and the use of a viscosity modifier-free lubricant as motor engine lubricant in a gasoline direct injection engine.