Patents by Inventor David Mentzer
David Mentzer 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: 9587184Abstract: Methods are provided for producing a plurality of lubricant base oil products with an increased overall yield. Prior to the final hydrocracking stage for viscosity index uplift, a feed for making a lubricant base oil is fractionated in order to form at least a feed for making a lighter lubricant base oil and a feed for making a heavier lubricant base oil. The fractionation cut points are selected to so that the feed fraction for forming a light lubricant base oil has a higher Noack volatility and a lower viscosity than the desired targets for the lighter lubricant base oil. The feed fractions are then hydroprocessed separately to achieve desired properties. After hydroprocessing, a portion of the heavier base oil is blended into the light lubricant base oil to produce a blended base oil product. This returns the volatility and the viscosity of the blended base oil to the desired specifications.Type: GrantFiled: September 21, 2011Date of Patent: March 7, 2017Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eric D. Joseck, Michael Brian Carroll, David Mentzer, Sara M. Berberich, Yogi V. Shukla
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Patent number: 9394494Abstract: Methods are provided for producing multiple lubricating oil basestocks from a feedstock. Prior to dewaxing, various fractions of the feedstock are exposed to hydrocracking conditions of different severity to produce a higher overall yield of basestocks. The hydrocracking conditions of different severity can represent exposing fractions of a feedstock to different processing conditions, exposing fractions of a feedstock to different amounts of hydrocracking catalyst, or a combination thereof.Type: GrantFiled: July 12, 2012Date of Patent: July 19, 2016Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eric D. Joseck, Michael Brian Carroll, David Mentzer, Teck-Mui Hoo, Michel Daage, Ajit Bhaskar Dandekar
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Patent number: 9212325Abstract: Conditions selected for lubricant base oil production can be used to also produce a high quality diesel product. The diesel product can have a cetane index or cetane number of at least 55, corresponding to a high value diesel fuel. The diesel product can also have good cold flow properties, such as a pour point of ?40° C. or less and/or a cloud point of ?25° C. or less. Additionally, the sulfur content of the diesel product can be low, such as less than 1 wppm. This can allow the diesel product to be blended with other potential diesel boiling range products that have a higher sulfur content while still meeting an overall diesel fuel specification. The aromatics content can also be low, allowing the premium diesel to comply with various regulatory requirements.Type: GrantFiled: September 12, 2012Date of Patent: December 15, 2015Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eric D. Joseck, Michael Brian Carroll, David Mentzer
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Publication number: 20150027925Abstract: Methods are provided for producing a plurality of lubricant base oil products with an increased overall yield. Prior to the final hydrocracking stage for viscosity index uplift, a feed for making a lubricant base oil is fractionated in order to form at least a feed for making a lighter lubricant base oil and a feed for making a heavier lubricant base oil. The fractionation cut points are selected to so that the feed fraction for forming a light lubricant base oil has a higher Noack volatility and a lower viscosity than the desired targets for the lighter lubricant base oil. The feed fractions are then hydroprocessed separately to achieve desired properties. After hydroprocessing, a portion of the heavier base oil is blended into the light lubricant base oil to produce a blended base oil product. This returns the volatility and the viscosity of the blended base oil to the desired specifications.Type: ApplicationFiled: September 21, 2011Publication date: January 29, 2015Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eric D. Joseck, Michael Brian Carroll, David Mentzer, Sara M. Berberich, Yogi V. Shukla
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Publication number: 20130092598Abstract: Methods are provided for producing multiple lubricating oil basestocks from a feedstock. Prior to dewaxing, various fractions of the feedstock are exposed to hydrocracking conditions of different severity to produce a higher overall yield of basestocks. The hydrocracking conditions of different severity can represent exposing fractions of a feedstock to different processing conditions, exposing fractions of a feedstock to different amounts of hydrocracking catalyst, or a combination thereof.Type: ApplicationFiled: July 12, 2012Publication date: April 18, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eric D. Joseck, Michael Brian Carroll, David Mentzer, Teck-Mui Hoo, Michel Daage, Ajit Bhaskar Dandekar
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Publication number: 20130066122Abstract: Conditions selected for lubricant base oil production can be used to also produce a high quality diesel product. The diesel product can have a cetane index or cetane number of at least 55, corresponding to a high value diesel fuel. The diesel product can also have good cold flow properties, such as a pour point of ?40° C. or less and/or a cloud point of 25° C. or less. Additionally, the sulfur content of the diesel product can be low, such as less than 1 wppm. This can allow the diesel product to be blended with other potential diesel boiling range products that have a higher sulfur content while still meeting an overall diesel fuel specification. The aromatics content can also be low, allowing the premium diesel to comply with various regulatory requirements.Type: ApplicationFiled: September 12, 2012Publication date: March 14, 2013Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eric D. Joseck, Michael Brian Carroll, David Mentzer
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Patent number: 8394256Abstract: The present invention is a process for removing waxy haze from and improving the filterability of base stocks including heavy mineral oil base stocks, gas-to-liquids (GTL) and hydrodewaxed or hydroisomerized waxy feed basestocks by filtering the waxy haze causing particles out of the base stock employing a filter characterized by a high surface area of pores accessible to the haze wax particles which have particles dimensions of no more than about 5 microns.Type: GrantFiled: October 13, 2009Date of Patent: March 12, 2013Assignee: Exxonmobil Research and Engineering CompanyInventors: James W. Gleeson, Eric B. Sirota, Charles L. Baker, Dennis A. Gaal, David Mentzer, John E. Gallagher, Jr., Min Chang, Norman G. Cathcart, Stephen A. Geibel, Mark F. Hurwitz, Tore H. Lindstrom, Michael B. Whitlock
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Patent number: 8366908Abstract: An integrated process for producing lubricant base oils from feedstocks under sour conditions is provided. The ability to process feedstocks under higher sulfur conditions allows for reduced cost processing and increases the flexibility in selecting a suitable feedstock. The sour feed can be delivered to a catalytic dewaxing step without any separation of sulfur and nitrogen contaminants, or a high pressure separation can be used to partially eliminate contaminants.Type: GrantFiled: December 23, 2009Date of Patent: February 5, 2013Assignee: ExxonMobil Research and Engineering CompanyInventors: Krista Marie Prentice, Gary Paul Schleicher, Lei Zhang, Timothy Lee Hilbert, Michel A. Daage, Sylvain Hantzer, Wenyih F. Lai, David Mentzer, William Francis Heaney, Christine Nicole Elia, Shifang Luo, Stephen J. McCarthy, Mohan Kalyanaraman
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Publication number: 20120261307Abstract: Provided is a three stage hydroprocessing process for producing lubricant base stocks with a stripping/separating zone between the first two hydroprocessing zones and a separating zone following the third hydroprocessing zone. The stripping/separating zone occurs at high pressure and temperature with no disengagement between or following the hydroprocessing zones and without the use of a liquid pump prior to the second hydroprocessing zone. The process pressure is greatest at the entrance to the first hydroprocessing zone. There is also recycle of compressed gaseous effluent from the last separating zone to the stripping zone, the first hydroprocessing zone, the second hydroprocessing zone, and/or the third hydroprocessing zone.Type: ApplicationFiled: April 11, 2012Publication date: October 18, 2012Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANYInventors: Eric D. Joseck, Michael Brian Carroll, David Mentzer
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Publication number: 20110083995Abstract: The present invention is a process for removing waxy haze from and improving the filterability of base stocks including heavy mineral oil base stocks, gas-to-liquids (GTL) and hydrodewaxed or hydroisomerized waxy feed basestocks by filtering the waxy haze causing particles out of the base stock employing a filter characterized by a high surface area of pores accessible to the haze wax particles which have particles dimensions of no more than about 5 microns.Type: ApplicationFiled: October 13, 2009Publication date: April 14, 2011Inventors: James W. Gleeson, Eric B. Sirota, Charles L. Baker, Dennis A. Gaal, David Mentzer, John E. Gallagher, JR., Min Chang, Norman G. Cathcart, Stephen A. Geibel, Mark F. Hurwitz, Tore H. Lindstrom, Michael B. Whitlock
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Publication number: 20100187156Abstract: An integrated process for producing lubricant base oils from feedstocks under sour conditions is provided. The ability to process feedstocks under higher sulfur conditions allows for reduced cost processing and increases the flexibility in selecting a suitable feedstock. The sour feed can be delivered to a catalytic dewaxing step without any separation of sulfur and nitrogen contaminants, or a high pressure separation can be used to partially eliminate contaminants.Type: ApplicationFiled: December 23, 2009Publication date: July 29, 2010Inventors: Krista Marie Prentice, Gary Paul Schleicher, Lei Zhang, Timothy Lee Hilbert, Michel A. Daage, Sylvain Hantzer, Wenyih F. Lai, David Mentzer, William Francis Heaney, Christine Nicole Elia, Shifang Luo, Stephen J. McCarthy, Mohan Kalyanaraman
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Patent number: 4334983Abstract: It has been discovered that extraction processes which employ solvents to separate components from a feed stream and which solvents are themselves recovered by stripping from the thus produced extract or raffinate or both are improved in that the solvent is stripped from the extract, raffinate or both by the use of steam which has been previously distilled from a major portion of the process stream in one of the initial stages of the solvent recovery process, which steam rather than being vented or condensed for disposal is employed as a replacement for specifically generated fresh steam. This recycle steam is employed to strip any residual solvent from the extract, the raffinate or both. The steam and any residual solvent thus stripped is recycled from the extract stripper, raffinate stripper or both to the input feed of the solvent recovery train.Type: GrantFiled: June 30, 1980Date of Patent: June 15, 1982Assignee: Exxon Research & Engineering Co.Inventor: David Mentzer