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).
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Patent number: 6610636Abstract: 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: GrantFiled: November 9, 2001Date of Patent: August 26, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
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Patent number: 6475960Abstract: 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: GrantFiled: September 4, 1998Date of Patent: November 5, 2002Assignee: ExxonMobil Research and Engineering Co.Inventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
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Patent number: 6458855Abstract: 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: GrantFiled: January 22, 1999Date of Patent: October 1, 2002Assignee: Exxon Research and Engineering CompanyInventors: Robert J. Wittenbrink, Paul J. Berlowitz, Tapan Chakrabaty, Loren L. Ansell
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Patent number: 6420618Abstract: 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: GrantFiled: April 28, 2000Date of Patent: July 16, 2002Assignee: ExxonMobil Research and Engineering CompanyInventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
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Publication number: 20020086803Abstract: 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: ApplicationFiled: November 9, 2001Publication date: July 4, 2002Inventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
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Patent number: 6375830Abstract: 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: GrantFiled: November 21, 2000Date of Patent: April 23, 2002Assignee: ExxonMobil Research and Engineering CompanyInventors: Janet R. Clark, Robert J. Wittenbrink, Daniel F. Ryan, Albert E. Schweizer
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Publication number: 20020005009Abstract: 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: ApplicationFiled: February 27, 2001Publication date: January 17, 2002Inventors: Robert J. Wittenbrink, Paul J. Berlowitz, Bruce R. Cook
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Patent number: 6332974Abstract: 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: GrantFiled: September 11, 1998Date of Patent: December 25, 2001Assignee: Exxon Research and Engineering Co.Inventors: Robert J. Wittenbrink, Daniel F. Ryan, Paul J. Berlowitz, Jacob J. Habeeb
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Patent number: 6325833Abstract: Emulsion blends are provided containing Fischer-Tropsch hydrocarbons, non-Fischer-Tropsch hydrocarbons, water, and a surfactant.Type: GrantFiled: September 12, 1997Date of Patent: December 4, 2001Assignee: Exxon Research and Engineering CompanyInventors: Paul J. Berlowitz, Robert J. Wittenbrink
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Patent number: 6309432Abstract: 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: GrantFiled: June 16, 1998Date of Patent: October 30, 2001Assignee: Exxon Research and Engineering CompanyInventors: Robert J. Wittenbrink, Paul J Berlowitz, Bruce R. Cook
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Patent number: 6294587Abstract: Fischer-Tropsch liquids, useful as distillate fuels are emulsified with water and a non-ionic surfactant.Type: GrantFiled: January 25, 1999Date of Patent: September 25, 2001Assignee: Exxon Research and Engineering CompanyInventors: Robert J. Wittenbrink, Paul J. Berlowitz, Tapan Chakrabaty, Loren L. Ansell, Daniel F. Ryan
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Patent number: 6284806Abstract: 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: GrantFiled: September 12, 1997Date of Patent: September 4, 2001Assignee: Exxon Research and Engineering CompanyInventors: Tapan Chakrabarty, Robert J. Wittenbrink, Paul J. Berlowitz, Loren L. Ansell
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Patent number: 6245709Abstract: 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: GrantFiled: August 22, 1997Date of Patent: June 12, 2001Assignee: Exxon Research and Engineering CompanyInventors: Janet R. Clark, Robert J. Wittenbrink, Stephen M. Davis, Kenneth L. Riley
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Patent number: 6180842Abstract: 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: GrantFiled: August 21, 1998Date of Patent: January 30, 2001Assignee: Exxon Research and Engineering CompanyInventors: Paul J Berlowitz, Robert J. Wittenbrink, Bruce R. Cook
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Patent number: 6179994Abstract: 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: GrantFiled: September 4, 1998Date of Patent: January 30, 2001Assignee: Exxon Research and Engineering CompanyInventors: Janet R. Clark, Robert J. Wittenbrink, Daniel F. Ryan, Albert E. Schweizer
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Patent number: 6165949Abstract: 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: GrantFiled: September 4, 1998Date of Patent: December 26, 2000Assignee: Exxon Research and Engineering CompanyInventors: Paul J. Berlowitz, Jacob J. Habeeb, Robert J. Wittenbrink
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Patent number: 6162956Abstract: 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: GrantFiled: August 18, 1998Date of Patent: December 19, 2000Assignee: Exxon Research and Engineering CoInventors: Paul J. Berlowitz, Robert J. Wittenbrink
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Patent number: 6147126Abstract: 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: GrantFiled: February 10, 1998Date of Patent: November 14, 2000Assignee: Exxon Research and Engineering CompanyInventors: Charles W. DeGeorge, Robert J. Wittenbrink, Thomas M. Stark
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Patent number: 6103099Abstract: 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: GrantFiled: September 4, 1998Date of Patent: August 15, 2000Assignee: Exxon Research and Engineering CompanyInventors: Robert J. Wittenbrink, Daniel F. Ryan, Douglas R. Boate
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Patent number: 6103773Abstract: 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: GrantFiled: February 27, 1998Date of Patent: August 15, 2000Assignee: Exxon Research and Engineering CoInventors: Robert J. Wittenbrink, Charles W. DeGeorge