1
Paul J Berlowitz, Jacob J Habeeb, Robert J Wittenbrink: Premium wear resistant lubricant. Exxon Research and Engineering Company, Jonathan N Provoost, Jay Simon, December 26, 2000: US06165949 (105 worldwide citation)

A premium synthetic lubricant having antiwear properties comprises a synthetic isoparaffinic hydrocarbon base stock and an effective amount of at least one antiwear additive. The antiwear additive is preferably at least one of a metal phosphate, a metal dialkyldithiophosphate, a metal dithiophosphat ...


2
Paul J Berlowitz, Jacob J Habeeb, Robert J Wittenbrink: Premium synthetic lubricant base stock having at least 95% non-cyclic isoparaffins. ExxonMobil Research and Engineering Company, Jay Simon, Jonathan N Provoost, June 27, 2000: US06080301 (102 worldwide citation)

A premium synthetic lubricating oil base stock having a high VI and low pour point is made by hydroisomerizing a Fischer-Tropsch synthesized waxy, paraffinic feed wax and then dewaxing the hydroisomerate to form a 650-750.degree. F.+ dewaxate. The waxy feed has an initial boiling point in the range ...


3
Robert J Wittenbrink, Daniel F Ryan, Douglas R Boate: Production of synthetic lubricant and lubricant base stock without dewaxing. Exxon Research and Engineering Company, Jay Simon, August 15, 2000: US06103099 (69 worldwide citation)

A lubricating base stock useful for forming lubricants such as a multigrade automotive oils, automatic transmission oils, greases and the like is prepared by hydroisomerizing a waxy hydrocarbon feed fraction having an initial boiling point in the 650-750.degree. F. range and an end point of at least ...


4
Gregg J Howsmon, Robert J Wittenbrink, Claude C Culross, Louis F Burns: Small catalyst particle addition to slurry reactor. Exxon Research and Engineering Co, November 2, 1999: US05977192 (59 worldwide citation)

Small particle size catalysts having an average particle size of less than 20 or 10 microns, which agglomerate when contacted with a hydrocarbon liquid, are easily dispersed in the hydrocarbon liquid by first forming a mixture comprising the catalyst particles and one or more non-acidic, liquid pola ...


5
Paul Joseph Berlowitz, Bruce Randall Cook, Robert J Wittenbrink: Synthetic diesel fuel and process for its production. Exxon Research & Engineering Company, Jay Simon, November 18, 1997: US05689031 (56 worldwide citation)

Clean distillate useful as a diesel fuel or diesel blending stock is produced from Fischer-Tropsch wax by separating wax into heavier and lighter fractions; further separating the lighter fraction and hydroisomerizing the heavier fraction and that portion of the light fraction below about 500.degree ...


6
Robert J Wittenbrink, Stephen Mark Davis, Larry L Iaccino: Conversion of fisher-tropsch waxes to lubricants by countercurrent processing. Exxon Research and Engineering Company, Henry E Naylor, March 16, 1999: US05882505 (55 worldwide citation)

A process for converting Fischer-Tropsch wax streams to lubricants by reacting said stream with a dewaxing catalyst in a reaction zone where the stream flows countercurrent to upflowing hydrogen-containing treat gas.


7
Charles W DeGeorge, Robert J Wittenbrink, Thomas M Stark: Gas conversion using hydrogen from syngas gas and hydroconversion tail gas. Exxon Research and Engineering Company, Jay Simon, Jonathan N Provoost, November 14, 2000: US06147126 (44 worldwide citation)

A gas conversion process including catalytic hydrocarbon synthesis from a synthesis gas comprising a mixture of H.sub.2 and CO, produces hydrogen from the synthesis gas and upgrades synthesized hydrocarbons by one or more hydroconversion operations which utilize this hydrogen. The hydroconversion al ...


8
Robert J Wittenbrink, Paul J Berlowitz, Bruce R Cook: Synthetic jet fuel and process for its production. Exxon Research and Engineering Company, Jay Simon, June 16, 1998: US05766274 (41 worldwide citation)

Clean distillate useful as a jet fuel or jet blending stock is produced from Fischer-Tropsch wax by separating wax into heavier and lighter fractions; further separating the lighter fraction and hydroisomerizing the heavier fraction and that portion of the light fraction above about 475.degree. F. T ...


9
Weiqing Weng, Srivatsan Srinivas, Robert J Wittenbrink: Polymerization process. ExxonMobil Chemical Patents, Michael Kerns, September 4, 2007: US07265193 (38 worldwide citation)

This invention relates to a process to polymerize olefins comprising: contacting: (i) propylene and (ii) a mixture comprising, optionally ethylene, and three or more different alpha olefins having 4 to 20 carbon atoms, wherein at least one alpha olefin is present at Z percent or more, based upon the ...


10
Janet R Clark, Robert J Wittenbrink, Daniel F Ryan, Albert E Schweizer: Isoparaffinic base stocks by dewaxing fischer-tropsch wax hydroisomerate over Pt/H-mordenite. Exxon Research and Engineering Company, Jonathan N Provoost, Jay Simon, January 30, 2001: US06179994 (35 worldwide citation)

A high VI and low pour point lubricant base stock is made by hydroisomerizing a high purity, waxy, paraffinic Fischer-Tropsch synthesized hydrocarbon fraction having an initial boiling point in the range of 650-750° F., followed by catalytically dewaxing the hydroisomerate using a dewaxing catalyst ...



Click the thumbnails below to visualize the patent trend.