Patents by Inventor Stephen J. Miller

Stephen J. Miller 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).

  • Publication number: 20120184787
    Abstract: A process for making a lubricating base oil having a viscosity index of at least 110, comprising the steps of: combining a waxy light neutral base oil and a wax derived from pyrolyzing a plastics feed comprising polyethylene to form a blend; hydroisomerization dewaxing the blend; and recovering the lubricating base oil from an effluent from the hydroisomerization dewaxing step.
    Type: Application
    Filed: January 18, 2011
    Publication date: July 19, 2012
    Inventor: Stephen J. Miller
  • Patent number: 8222471
    Abstract: We provide a process, comprising oligomerizing one or more olefins having a boiling point less than 82° C. in a presence of an ionic liquid catalyst and one or more C5+ alpha olefins in a reactor to produce a base oil having a kinematic viscosity at 100° C. of 36 mm2/s or higher and a VI greater than 55; and wherein the one or more olefins having the boiling point less than 82° C. comprise greater than 50 wt % of a total mixture of olefins fed to the reactor. We provide a process, comprising oligomerizing olefins having a low boiling point in a presence of an ionic liquid catalyst and a mixture of C5+ alpha olefins derived from waste plastic to produce a base oil having a kinematic viscosity at 40° C. greater than 1100 mm2/s and a VI greater than 55. We also provide a base oil made by the process.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: July 17, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Saleh Elomari, Stephen J. Miller, Sven Ivar Hommeltoft, Hye-Kyung C. Timken
  • Patent number: 8221531
    Abstract: A method of making a crosslinked polyimide membrane is described. A monoesterified membrane is formed from a monoesterified polyimide polymer. The monoesterified membrane is subjected to transesterification conditions to form a crosslinked membrane. The monoesterified membrane is incorporated with an organic titanate catalyst before or after formation of the monoesterified membrane. A crosslinked polyimide membrane made using the aforementioned method and a method of using the membrane to separate fluids in a fluid mixture also are described.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: July 17, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: John D. Wind, Stephen J. Miller, Oluwasijibomi O. Okeowo
  • Patent number: 8216448
    Abstract: A method for improving the lubricating properties of a distillate base oil characterized by a pour point of 0 degrees C. or less and a boiling range having the 10 percent point falling between about 625 degrees F. and about 790 degrees F. and the 90 percent point falling between about 725 degrees F. and about 950 degrees F., the method comprises blending with said distillate base oil a sufficient amount of a pour point depressing base oil blending component to reduce the pour point of the resulting base oil blend at least 3 degrees C. below the pour point of the distillate base oil, wherein the pour point depressing base oil blending component is an isomerized Fischer-Tropsch derived bottoms product having a pour point that is at least 3 degrees C. higher than the pour point of the distillate base oil.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: July 10, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventor: Stephen J. Miller
  • Publication number: 20120161085
    Abstract: Provided is an electrical insulating oil formulation comprising at least one diester or triester species having ester links on adjacent carbons, and an anti-oxidant additive. The formulation exhibits an excellent balance of the pour point, viscosity and fire point properties, and is imminently suitable for use as a transformer oil.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Applicant: Chevron U.S.A. Inc.
    Inventors: Ryan J. Schexnaydre, John M. Rosenbaum, Saleh Elomari, Stephen J. Miller, Zhen Zhou
  • Publication number: 20120164506
    Abstract: Provided is a heat transfer fluid formulation comprising at least one diester or triester species having ester links on adjacent carbons. The formulation exhibits an excellent balance of dielectric and heat transfer properties, and is useful as a coolant for electric vehicles.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 28, 2012
    Applicant: Chevron U.S.A. Inc.
    Inventors: Sandra G. Claeys, Serge S. Lievens, Paul Van De Ven, Zhen Zhou, Stephen J. Miller, Ryan J. Schexnaydre, Saleh Elomari
  • Publication number: 20120149953
    Abstract: We provide a process, comprising oligomerizing one or more olefins having a boiling point less than 82° C. in a presence of an ionic liquid catalyst and one or more C5+ alpha olefins in a reactor to produce a base oil having a kinematic viscosity at 100° C. of 36 mm2/s or higher and a VI greater than 55; and wherein the one or more olefins having the boiling point less than 82° C. comprise greater than 50 wt % of a total mixture of olefins fed to the reactor. We provide a process, comprising oligomerizing olefins having a low boiling point in a presence of an ionic liquid catalyst and a mixture of C5+ alpha olefins derived from waste plastic to produce a base oil having a kinematic viscosity at 40° C. greater than 1100 mm2/s and a VI greater than 55. We also provide a base oil made by the process.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 14, 2012
    Inventors: Saleh A. Elomari, Stephen J. Miller, Sven Ivar Hommeltoft, Hye-Kyung C. Timken
  • Publication number: 20120149612
    Abstract: A process for making base oil, comprising: oligomerizing one or more olefins having a boiling point less than 82° C. in the presence of an ionic liquid catalyst to produce the base oil having a kinematic viscosity at 40° C. of 1100 mm2/s or higher. Also, a process, comprising: oligomerizing the olefins in the presence of an ionic liquid catalyst to produce the base oil having a kinematic viscosity at 40° C. of 300 mm2/s or higher and a low cloud point, wherein a wt % yield of products boiling at 482° C.+ (900° F.+) is at least 65 wt % of a total yield of products from the oligomerizing. Additionally, a process, comprising: oligomerizing the olefins in the presence of an ionic liquid catalyst to produce the base oil having a kinematic viscosity at 40° C. greater than 1100 mm2/s and a low cloud point.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 14, 2012
    Inventors: Saleh Elomari, Stephen J. Miller, Sven Ivar Hommeltoft
  • Patent number: 8178739
    Abstract: A process, comprising: a. selecting a kinematic viscosity; b. feeding an olefin feed comprising a propylene to an oligomerization zone; c. tuning an oligomerizing step to produce a base oil having the kinematic viscosity and a viscosity index from 20 to 90. A process, comprising: a. selecting a kinematic viscosity that is greater than 20 mm2/s; b. feeding a feed comprising propylene to an oligomerization zone; and c. adding a Brönsted acid to produce a base oil. A process, comprising tuning a step in an oligomerization zone comprising a propylene and an ionic liquid catalyst to produce a base oil having: a. a high kinematic viscosity; b. a viscosity index from 25 to 90; and c. a low pour point. A base oil, comprising oligomerized olefins, wherein the base oil has: a. a high kinematic viscosity; b. a viscosity index from 25 to 90; and c. a low pour point.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: May 15, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Saleh Elomari, Stephen J. Miller
  • Publication number: 20120111191
    Abstract: A composition of and a method of making high performance crosslinked membranes are described. The membranes have a high resistance to plasticization by use of crosslinking. The preferred polymer material for the membrane is a polyimide polymer comprising covalently bonded ester crosslinks. The resultant membrane exhibits a high permeability of CO2 in combination with a high CO2/CH4selectivity. Another embodiment provides a method of making the membrane from a monesterified polymer followed by final crosslinking after the membrane is formed.
    Type: Application
    Filed: December 17, 2010
    Publication date: May 10, 2012
    Inventors: William J. Koros, David Wallace, John D. Wind, Stephen J. Miller, Claudia Staudt-Bickel
  • Publication number: 20120102827
    Abstract: A method comprising the steps of providing a fatty acyl mixture comprising: (i) a C10-C16 acyl carbon atom chain content of at least 30 wt. % wherein at least 80% of the C10-C16 acyl carbon atom chains are saturated; and (ii) a C18-C22 acyl carbon atom chain content of at least 20 wt. % wherein at least 50% of the acyl C16-C22 carbon atom chains contain at least one double bond; hydrolyzing at least some of the mixture to yield a quantity of C10-C16 saturated fatty acids and C18-C22 unsaturated fatty acids; oligomerizing at least some of the C18-C22 unsaturated fatty acids to yield a quantity of C36+ fatty acid oligomers; separating at least some of the C10-C16 saturated fatty acids from the C36+ fatty acid oligomers.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 3, 2012
    Inventor: Stephen J. Miller
  • Publication number: 20120108870
    Abstract: A method comprising the steps of providing a fatty acyl mixture comprising: (i) a C10-C16 acyl carbon atom chain content of at least 30 wt. % wherein at least 80% of the C10-C16 acyl carbon atom chains are saturated; and (ii) a C18-C22 acyl carbon atom chain content of at least 20 wt. % wherein at least 50% of the acyl C18-C22 carbon atom chains contain at least one olefin; oligomerizing at least some of the mixture to yield a second mixture comprising C36+ oligomers; hydrotreating the second mixture to yield a quantity of diesel fuel blendstock and C36+ alkanes; and separating at least some of the diesel fuel blendstock from the C36+ alkanes.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 3, 2012
    Inventor: Stephen J. Miller
  • Publication number: 20120102828
    Abstract: A method comprising providing a fatty acyl mixture comprising: (i) a C10-C16 acyl carbon atom chain content of at least 30 wt. % wherein at least 80% of the C10-C16 acyl carbon atom chains are saturated; and (ii) a C18-C22 acyl carbon atom chain content of at least 20 wt. % wherein at least 50% of the acyl C18-C22 carbon atom chains contain at least one double bond; hydrolyzing the mixture to yield a quantity of C10-C16 saturated fatty acids and C18-C22 unsaturated fatty acids; separating the C10-C16 saturated fatty acids from the C18-C22 unsaturated fatty acids; hydrotreating the C10-C16 saturated fatty acids to yield a quantity of diesel fuel blendstock; oligomerizing at least some of the C18-C22 unsaturated fatty acids to yield a quantity of C36+ fatty acid oligomers; and hydrotreating the C36+ fatty acid oligomers to yield a quantity of C36+ alkanes.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 3, 2012
    Inventor: Stephen J. Miller
  • Publication number: 20120108869
    Abstract: A method comprising the steps of providing a quantity of biologically-derived oil comprising triglycerides; processing the biologically derived oil so as to transesterify at least some of the triglycerides contained therein to yield a quantity of saturated monoesters and unsaturated monoesters; oligomerizing at least some of the unsaturated monoesters to yield a quantity of fatty acid ester oligomers; separating at least some of the saturated monoesters from the fatty acid ester oligomers; and hydrotreating at least some of the fatty acid ester oligomers to yield a quantity of alkanes.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 3, 2012
    Inventors: Stephen J. Miller, Paul F. Bryan
  • Publication number: 20120108871
    Abstract: A method comprising providing a fatty acyl mixture comprising: (i) a C10-C16 acyl carbon atom chain content of at least 30 wt. % wherein at least 80% of the C10-C16 acyl carbon atom chains are saturated; and (ii) a C18-C22 acyl carbon atom chain content of at least 20 wt. % wherein at least 50% of the acyl C18-C22 carbon atom chains contain at least one double bond; hydrolyzing the mixture to yield a quantity of C10-C16 saturated fatty acids and C18-C22 unsaturated fatty acids; oligomerizing at least some of the C18-C22 unsaturated fatty acids to yield a quantity of C36+ fatty acid oligomers; hydrotreating at least some of the C10-C16 saturated fatty acids and at least some of the C36+ fatty acid oligomers to yield a quantity of diesel fuel blendstock and C36+ alkanes; and separating at least some of the diesel fuel blendstock from the C36+ alkanes.
    Type: Application
    Filed: October 28, 2010
    Publication date: May 3, 2012
    Inventor: Stephen J. Miller
  • Publication number: 20120067208
    Abstract: The present disclosure relates to a high molecular weight, monoesterified polyimide polymer. Such high molecular weight, monoesterified polyimide polymers are useful in forming crosslinked polymer membranes for the separation of fluid mixtures. According to its broadest aspect, the method of making a crosslinked membrane comprises the following steps: (a) preparing a polyimide polymer comprising carboxylic acid functional groups from a reaction solution comprising monomers and at least one solvent; (b) treating the polyimide polymer with a diol at esterification conditions in the presence of dehydrating conditions to form a monoesterified polyimide polymer; and (c) subjecting the monoesterified fiber to transesterification conditions to form a crosslinked fiber membrane, wherein the dehydrating conditions at least partially remove water produced during step (b). The crosslinked membranes can be used to separate at least one component from a feed stream including more than one component.
    Type: Application
    Filed: November 28, 2011
    Publication date: March 22, 2012
    Applicants: Georgia Tech Research Corporation, Chevron U.S.A. Inc.
    Inventors: Stephen J. MILLER, Imona C. Omole, William J. Koros
  • Publication number: 20120061295
    Abstract: The present invention is a method for synthesizing non-zeolitic molecular sieves which have a three dimensional microporous framework comprising [AlO2] and [PO2] units. In preparing the reaction mixture, a surfactant is used, coupled with non-aqueous impregnation to prevent acid sites from being destroyed by water during Pt impregnation. The superior SAPO exhibits higher activity and selectivity especially in catalytic hydroisomerization of waxy feeds, due to the presence of medium-sized silica islands distributed throughout the SAPO.
    Type: Application
    Filed: October 4, 2011
    Publication date: March 15, 2012
    Applicant: CHEVRON U.S.A. INC.
    Inventor: Stephen J. MILLER
  • Publication number: 20120048109
    Abstract: Disclosed herein are mixed matrix membranes which include a continuous phase organic polymer with molecular sieves interspersed therein, the molecular sieves comprising one or more zeolites having an HEU structure type; wherein the membrane exhibits a mixed matrix effect and further wherein the membrane has a N2/CH4 selectivity of greater than about 5, at 35° C. and a pressure of 100 psia (690 kPa). Methods for their preparation and use are also disclosed.
    Type: Application
    Filed: August 24, 2010
    Publication date: March 1, 2012
    Applicant: CHEVRON U. S. A. INC.
    Inventors: Daniel Chinn, De Q. Vu, Stephen J. Miller, Paul F. Bryan, Curtis L. Munson
  • Patent number: 8124823
    Abstract: A process for producing a jet fuel, comprising contacting an olefin and an isoparaffin with an unsupported catalyst system comprising an ionic liquid catalyst and a halide containing additive in an alkylation zone under alkylation conditions to make an alkylate product, and recovering the jet fuel from the alkylate product, wherein the jet fuel has a NMR branching index greater than 60 and meets the boiling point, flash point, smoke point, heat of combustion, and freeze point requirements for Jet A-1 fuel. Also a process for producing a jet fuel, comprising providing a feed produced in a FC cracker comprising olefins, mixing the feed with an isoparaffin, alkylating the mixed feed in an ionic liquid alkylation zone, and separating the jet fuel from the alkylated product.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: February 28, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Sven Ivar Hommeltoft, Stephen J. Miller, Ajit R. Pradhan
  • Patent number: 8124821
    Abstract: We provide a process, comprising: a. oligomerizing propylene in ionic liquid; b. optionally alkylating the oligomer; to make a base oil having: i. a kinematic viscosity at 100° C. of 2.9 mm2/s or greater, ii. a viscosity index from 25 to 90, and iii. a low cloud point. We provide a process, comprising: oligomerizing a feed comprising propylene and propane to make a base oil having: i. from 45 to 70 wt % hydrocarbons boiling at 900° F. or higher, ii. a viscosity index from 25 to 90, and iii. a low cloud point. We provide a process, comprising: a. mixing longer chain alpha olefins with propylene; b. oligomerizing the feed, to make a base oil having: i. a kinematic viscosity at 100° C. greater than 10 mm2/s; ii. a viscosity index from 50 to 90; iii. a low pour point; and iv. a low cloud point.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: February 28, 2012
    Assignee: Chevron U.S.A. Inc.
    Inventors: Saleh Elomari, Stephen J. Miller