Patent ID: 7282134

Claim:
A process for manufacturing a lubricating base oil, comprising the steps of: a. performing a Fischer-Tropsch synthesis on syngas to provide a product stream; b. isolating from said product stream a substantially paraffinic wax feed having: i. less than about 30 ppm total combined nitrogen and sulfur, ii. less than about 1 weight percent oxygen, iii. a weight ratio of molecules having at least 60 or more carbon atoms and molecules having at least 30 carbon atoms less than 0.15, iv. and a T90 boiling point between 660° F. (349° C.) and 1200° F. (649° C.); c. dewaxing said substantially paraffinic wax feed by hydroisomerization dewaxing using a shape selective intermediate pore size molecular sieve comprising a noble metal hydrogenation component, wherein the hydroisomerization temperature is between about 600° F. (315° C.) and about 750° F. (399° C.), whereby an isomerized oil is produced; and d. hydrofinishing said isomerized oil, whereby a lubricating base oil is produced having: i. a weight percent of all molecules with at least one aromatic function less than 0.30; ii. a weight percent of all molecules with at least one cycloparaffin function greater than 10; and iii. a ratio of weight percent of molecules containing monocycloparaffins to weight percent of molecules containing multicycloparaffins greater than 15.