Patents by Inventor Robert J. Wittenbrink

Robert J. Wittenbrink has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6610636
    Abstract: 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 dithiophosphate a metal thiocarbamate, a metal dithiocarbamate, an ethoxylated amine dialkyldithiophosphate and an ethoxylated amine dithiobenzoate. Metal dialkyldithiophosphates are preferred, particularly zincdialkyldithiophosphate (ZDDP). The base stock is derived from a waxy, Fischer-Tropsch synthesized hydrocarbon feed fraction comprising hydrocarbons having an initial boiling point in the range of about 650-750° F., by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The lubricant may also contain hydrocarbonaceous and synthetic base stock material in admixture with the Fischer-Tropsch derived base stock.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: August 26, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
  • Patent number: 6475960
    Abstract: Premium synthetic lubricants comprise a synthetic isoparaffinic hydrocarbon base stock and an effective amount of at least one, and typically a plurality of lubricant additives such as a detergent, dispersant, antioxidant, antiwear additive, pout point depresant, VI improver and the like. The base stock is derived from a waxy, paraffinic, Fischer-Tropsch synthesized hydrocarbon feed fraction having an initial boiling point in the range of about 650-750° F. and continuously boiling up to at least 1050° F., by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The waxy feed has a T90−T10 temperature difference of at least 350° F. and is preferably hydroisomerized without any pretreatment, other than optional fractionation. The lubricant may also contain hydrocarbonaceous and synthetic base stock material.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: November 5, 2002
    Assignee: ExxonMobil Research and Engineering Co.
    Inventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
  • Patent number: 6458855
    Abstract: Stable hydrocarbon in water emulsions are formed by emulsifying the hydrocarbon with a non-ionic surfactant and water obtained from the Fischer-Tropsch process.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: October 1, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert J. Wittenbrink, Paul J. Berlowitz, Tapan Chakrabaty, Loren L. Ansell
  • Patent number: 6420618
    Abstract: 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° F.+ dewaxate. The waxy feed has an initial boiling point in the range of about 650-750° F., from which it continuously boils up to at least 1050° F. and has a T90−T10 temperature difference of at least 350° F. The feed is preferably hydroisomerized without any pretreatment, other than optional fractionation. The 650-750° F.+ dewaxate is fractionated into two or more base stocks of different viscosity.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: July 16, 2002
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
  • Publication number: 20020086803
    Abstract: 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 dithiophosphate a metal thiocarbamate, a metal dithiocarbamate, an ethoxylated amine dialkyldithiophosphate and an ethoxylated amine dithiobenzoate. Metal dialkyldithiophosphates are preferred, particularly zincdialkyldithiophosphate (ZDDP). The base stock is derived from a waxy, Fischer-Tropsch synthesized hydrocarbon feed fraction comprising hydrocarbons having an initial boiling point in the range of about 650-750° F., by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The lubricant may also contain hydrocarbonaceous and synthetic base stock material in admxture with the Fischer-Tropsch derived base stock.
    Type: Application
    Filed: November 9, 2001
    Publication date: July 4, 2002
    Inventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
  • Patent number: 6375830
    Abstract: 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 comprising a catalytic platinum component and an H-mordenite component. The hydrocarbon fraction is preferably synthesized by a slurry Fischer-Tropsch using a catalyst containing a catalytic cobalt component. This combination of the process, high purity, waxy paraffinic feed and the Pt/H-mordenite dewaxing catalyst, produce a relatively high yield of premium lubricant base stock.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: April 23, 2002
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Janet R. Clark, Robert J. Wittenbrink, Daniel F. Ryan, Albert E. Schweizer
  • Publication number: 20020005009
    Abstract: 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° F. The isomerized product is blended with the untreated portion of the lighter fraction to produce high quality, clean, jet fuel.
    Type: Application
    Filed: February 27, 2001
    Publication date: January 17, 2002
    Inventors: Robert J. Wittenbrink, Paul J. Berlowitz, Bruce R. Cook
  • Patent number: 6332974
    Abstract: A wide-cut lubricant base stock is made by hydroisomerizing and then catalytically dewaxing a waxy Fischer-Tropsch synthesized hydrocarbon fraction feed and comprises the entire dewaxate having an initial boiling point in the 650-75O° F.+ range. Formulated lubricating oils made by admixing the base stock with a commercial automotive additive package meet all specifications, including low temperature properties, for multigrade internal combustion engine crankcase oils. The waxy feed has an initial boiling point in the 650-750° F. range and continuously boils to an end point of at least 1050° F.+. Lower boiling hydrocarbons produced by the process are separated from the base stock by simple flash distillation. The base stock comprises the entire dewaxate having an initial boiling point in the 650-750° F. range.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: December 25, 2001
    Assignee: Exxon Research and Engineering Co.
    Inventors: Robert J. Wittenbrink, Daniel F. Ryan, Paul J. Berlowitz, Jacob J. Habeeb
  • Patent number: 6325833
    Abstract: Emulsion blends are provided containing Fischer-Tropsch hydrocarbons, non-Fischer-Tropsch hydrocarbons, water, and a surfactant.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: December 4, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Paul J. Berlowitz, Robert J. Wittenbrink
  • Patent number: 6309432
    Abstract: 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° F. The isomerized product is blended with the untreated portion of the lighter fraction to produce high quality, clean, jet fuel.
    Type: Grant
    Filed: June 16, 1998
    Date of Patent: October 30, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert J. Wittenbrink, Paul J Berlowitz, Bruce R. Cook
  • Patent number: 6294587
    Abstract: Fischer-Tropsch liquids, useful as distillate fuels are emulsified with water and a non-ionic surfactant.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: September 25, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert J. Wittenbrink, Paul J. Berlowitz, Tapan Chakrabaty, Loren L. Ansell, Daniel F. Ryan
  • Patent number: 6284806
    Abstract: Hydrocarbon in water emulsions comprising Fischer-Tropsch process water, at least 20 to about 90 weight percent of a Fischer-Tropsch wax, a first nonionic surfactant having an HLB of at least 11 and a second nonionic surfactant having an HLB less than 11. Said emulsions are liquid at room temperature and pour by ordinary gravity. Also disclosed are methods of making said hydrocarbon in water emulsions.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: September 4, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Tapan Chakrabarty, Robert J. Wittenbrink, Paul J. Berlowitz, Loren L. Ansell
  • Patent number: 6245709
    Abstract: Nickel-copper catalysts supported on an amorphous silica-alumina acidic carrier, preferably containing a binder, and having an iso-electric point of ≧6.5 are used to hydroisomerize paraffins, particularly Fischer-Tropsch paraffins, boiling at 350° F.+ into lighter, more valuable products.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: June 12, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Janet R. Clark, Robert J. Wittenbrink, Stephen M. Davis, Kenneth L. Riley
  • Patent number: 6180842
    Abstract: A Fischer-Tropsch derived distillate fraction is blended with either a raw virgin condensate fraction or a mildly hydrotreated virgin condensate to obtain a stable inhibited distillate fuel.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: January 30, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Paul J Berlowitz, Robert J. Wittenbrink, Bruce R. Cook
  • Patent number: 6179994
    Abstract: 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 comprising a catalytic platinum component and an H-mordenite component. The hydrocarbon fraction is preferably synthesized by a slurry Fischer-Tropsch using a catalyst containing a catalytic cobalt component. This combination of the process, high purity, waxy paraffinic feed and the Pt/H-mordenite dewaxing catalyst, produce a relatively high yield of premium lubricant base stock.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: January 30, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Janet R. Clark, Robert J. Wittenbrink, Daniel F. Ryan, Albert E. Schweizer
  • Patent number: 6165949
    Abstract: 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 dithiophosphate a metal thiocarbamate, a metal dithiocarbamate, an ethoxylated amine dialkyldithiophosphate and an ethoxylated amine dithiobenzoate. Metal dialkyldithiophosphates are preferred, particularly zincdialkyldithiophosphate (ZDDP). The base stock is derived from a waxy, Fischer-Tropsch synthesized hydrocarbon feed fraction comprising hydrocarbons having an initial boiling point in the range of about 650-750.degree. F., by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The lubricant may also contain hydrocarbonaceous and synthetic base stock material in admxture with the Fischer-Tropsch derived base stock.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: December 26, 2000
    Assignee: Exxon Research and Engineering Company
    Inventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
  • Patent number: 6162956
    Abstract: A Fischer-Tropsch derived distillate fraction is blended with either a raw gas field condensate distillate fraction or a mildly hydrotreated condensate fraction to obtain a stable, inhibited distillate fuel.
    Type: Grant
    Filed: August 18, 1998
    Date of Patent: December 19, 2000
    Assignee: Exxon Research and Engineering Co
    Inventors: Paul J. Berlowitz, Robert J. Wittenbrink
  • Patent number: 6147126
    Abstract: 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 also produces a hydrogen rich tail gas which is used in the process for at least one of (i) hydrocarbon synthesis catalyst rejuvenation, (ii) the hydrocarbon synthesis, and (iii) hydrogen production. In one embodiment the tail gas is used to hydrodesulfurize sulfur-containing hydrocarbon liquids recovered from the natural gas used to form the synthesis gas. The hydrogen production is accomplished by physical separation, such as PSA, with or without chemical means such as a water gas shift reaction.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: November 14, 2000
    Assignee: Exxon Research and Engineering Company
    Inventors: Charles W. DeGeorge, Robert J. Wittenbrink, Thomas M. Stark
  • Patent number: 6103099
    Abstract: 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 1050.degree. F., synthesized by a slurry Fischer-Tropsch hydrocarbon synthesis process. The hydroisomerization forms a hydroisomerate containing the desired base stock which is recovered, without dewaxing the hydroisomerate. The hydroisomerization is conducted at conditions effective to convert at least 67 wt. % of the 650-750.degree. F.+ waxy feed hydrocarbons to lower boiling hydrocarbons. When combined with a standard lubricant additive package, these base stocks have been formed into multigrade automotive crankcase oils, transmission oils and hydraulic oils meeting the specifications for these oils.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: August 15, 2000
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert J. Wittenbrink, Daniel F. Ryan, Douglas R. Boate
  • Patent number: 6103773
    Abstract: A gas conversion process comprising synthesis gas production, hydrocarbon synthesis and hydrogen production from the synthesis gas, also includes hydrodesulfurizing sulfur-containing hydrocarbon liquids separated from a mixture of natural gas and the liquids produced from a gas well. Hydrogen produced from the synthesis gas is used for the hydrodesulfurization, to remove at least a portion of the sulfur as H.sub.2 S and form desulfurized hydrocarbon liquid. The hydrogen is produced from the synthesis gas by one or more of (i) physical separation means such as pressure swing adsorption and (ii) chemical means such as a water gas shift reactor. The synthesized hydrocarbons are upgraded by hydroconversion. A portion of the hydrogen produced from the synthesis gas may also be used for at least one of (i) hydrocarbon synthesis catalyst rejuvenation and the hydroconversion.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: August 15, 2000
    Assignee: Exxon Research and Engineering Co
    Inventors: Robert J. Wittenbrink, Charles W. DeGeorge