US 9,809,760 B2
Method for producing a base oil having high weight percent total molecules with cycloparaffinic functionality and low weight percent molecules with multicycloparaffinic functionality
John M. Rosenbaum, Richmond, CA (US); Nancy J. Bertrand, Lafayette, CA (US); Scott C. Deskin, Alameda, CA (US); Kamala Krishna, Danville, CA (US); Stephen J. Miller, San Francisco, CA (US); and Susan M. Abernathy, Hercules, CA (US)
Assigned to Chevron U.S.A. Inc., San Ramon, CA (US)
Filed by John M. Rosenbaum, Richmond, CA (US); Nancy J. Bertrand, Lafayette, CA (US); Scott C. Deskin, Alameda, CA (US); Kamala Krishna, Danville, CA (US); Stephen J. Miller, San Francisco, CA (US); and Susan M. Abernathy, Hercules, CA (US)
Filed on Jun. 26, 2009, as Appl. No. 12/493,048.
Application 12/493,048 is a division of application No. 11/438,108, filed on May 19, 2006, granted, now 7,763,161.
Application 11/438,108 is a continuation in part of application No. 10/744,389, filed on Dec. 23, 2003, granted, now 7,083,713.
Application 10/744,389 is a continuation in part of application No. 10/744,870, filed on Dec. 23, 2003, granted, now 7,282,134.
Application 10/744,870 is a continuation in part of application No. 10/743,932, filed on Dec. 23, 2003, granted, now 7,195,706.
Prior Publication US 2009/0321308 A1, Dec. 31, 2009
Int. Cl. C10M 177/00 (2006.01); C10G 45/64 (2006.01); C10G 2/00 (2006.01); C10G 65/04 (2006.01)
CPC C10G 45/64 (2013.01) [C10G 2/32 (2013.01); C10G 65/043 (2013.01); C10G 2400/10 (2013.01); Y10S 208/95 (2013.01)] 19 Claims
 
1. A method for producing a lubricating base oil having greater than 10 weight percent total molecules with cycloparaffinic functionality and less than 0.5 weight percent of molecules with multicycloparaffinic functionality, comprising:
a. selecting a Fischer-Tropsch derived wax having a weight ratio of molecules having at least 60 or more carbon atoms and molecules having at least 30 carbon atoms of 0.01 or less, wherein the Fischer-Tropsch derived wax has a difference between the T90 and T10 boiling points of at least 171° F. (95° C.); and
b. hydroisomerization dewaxing the Fischer-Tropsch derived wax under a set of conditions comprising a hydrogen to feed ratio from about 712.4 to about 3562 liter H2/liter feed (about 4 to about 20 MSCF/bbl) to produce the lubricating base oil, with the lubricating base oil having a viscosity index greater than an amount defined by the equation: VI=28×Ln(Kinematic Viscosity at 100° C.)+95.