Patents by Inventor Sumathy Raman

Sumathy Raman 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: 10894925
    Abstract: A multi-stage process for upgrading tars is provided. A predominantly hydrotreating stage can be applied before a cracking stage, which can be a hydrocracking or a thermal cracking stage. Alternatively, a predominantly cracking stage, which can be a hydrocracking or a thermal cracking stage, can be applied before a hydrotreating stage. Apparatus suitable for performing the method is also provided.
    Type: Grant
    Filed: July 2, 2018
    Date of Patent: January 19, 2021
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Kapil Kandel, Bryan A. Patel, Sumathy Raman, John S. Coleman, Reyyan Koc-Karabocek, Teng Xu, Cyrus J. Rachal, Subramanya V. Nayak
  • Patent number: 10865487
    Abstract: An electrochemical conversion method for converting at least a portion of a first mixture comprising hydrocarbon to C2+ unsaturates by repeatedly applying an electric potential difference, V(?1), to a first electrode of an electrochemical cell during a first time interval ?1; and reducing the electric potential difference, V(?1), to a second electric potential difference, V(?2), for a second time interval ?2, wherein ?2??1. The method is beneficial, among other things, for reducing coke formation in the electrochemical production of C2+ unsaturates in an electrochemical cell. Accordingly, a method of reducing coke formation in the electrochemical conversion of such mixtures and a method for electrochemically converting carbon to C2+ unsaturates as well as an apparatus for such methods are also provided.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: December 15, 2020
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Walter Weissman, Sumathy Raman, Mark A. Greaney
  • Patent number: 10851036
    Abstract: Systems and methods are provided for direct methane conversion to methanol. The methods can include exposing methane to an oxidant, such as O2, in a solvent at conditions that are substantially supercritical for the solvent while having a temperature of about 310° C. or less, or about 300° C. or less, or about 290° C. or less. The solvent can correspond to an electron donor solvent that, when in a supercritical state, can complex with O2. By forming a complex with the O2, the supercritical electron donor solvent can facilitate conversion of methane to methanol at short residence times while reducing or minimizing further oxidation of the methanol to other products.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: December 1, 2020
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Partha Nandi, Steven L. Suib, Sumathy Raman
  • Publication number: 20200071164
    Abstract: Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.
    Type: Application
    Filed: August 14, 2019
    Publication date: March 5, 2020
    Inventors: Ramesh Gupta, Sumathy Raman, Hugo S. Caram, David C. Dankworth
  • Publication number: 20200071162
    Abstract: Systems and methods for molten media pyrolysis for the conversion of methane into hydrogen and carbon-containing particles are disclosed. The systems and methods include the introduction of seed particles into the molten media to facilitate the growth of larger, more manageable carbon-containing particles. Additionally or alternatively, the systems and methods can include increasing the residence time of carbon-containing particles within the molten media to facilitate the growth of larger carbon-containing particles.
    Type: Application
    Filed: August 14, 2019
    Publication date: March 5, 2020
    Inventors: Ramesh Gupta, Sumathy Raman, Hugo S. Caram, David C. Dankworth
  • Patent number: 10570342
    Abstract: Systems and methods are provided for solvent deasphalting of steam cracker tar. The resulting deasphalted oil produced from the steam cracker tar can then be hydroprocessed, such as hydrotreated and/or hydrocracked in a fixed bed reactor. The solvent deasphalting can correspond to a mild or trim deasphalting or can correspond to solvent deasphalting at higher solvent to oil ratios. Performing a trim deasphalting can reduce or minimize the amount of deasphalting residue that is formed as a product from the deasphalting process.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: February 25, 2020
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Patrick L. Hanks, Anjaneya S. Kovvali, David T. Ferrughelli, Steven Pyl, Sumathy Raman
  • Patent number: 10527601
    Abstract: A method is disclosed for determining a presence, type, quality and/or volume of a subsurface hydrocarbon accumulation from a sample related thereto. The method may include obtaining sample data associated with a subsurface hydrocarbon accumulation, wherein the sample data includes a noble gas signature, a clumped isotope signature and/or a ecology signature. From the signatures, relationships between the noble gas signature; the clumped isotope signature and the ecology signature are identified and stored in memory.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: January 7, 2020
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Sebastien L. Dreyfus, Michael Lawson, Aaron B. Regberg, A. Lucie N'Guessan, Robert J. Pottorf, Steven R. May, Amelia C. Robinson, William G. Powell, Sumathy Raman
  • Publication number: 20190352572
    Abstract: Systems and methods are provided for adding a heated stream of light hydrocarbons to a fluidized coking environment to improve liquid product yield and/or reduce coke production. The light hydrocarbons can correspond to C1-C10 hydrocarbons and/or hydrogen. The light hydrocarbons can be heated so that the light hydrocarbons are exposed to an activation temperature of 535° C. to 950° C. and/or an activation temperature higher than the temperature in the coking zone by 50° C. or more for an activation time prior to entering the fluidized coking reactor and/or the coking zone in the fluidized coking environment.
    Type: Application
    Filed: May 16, 2018
    Publication date: November 21, 2019
    Inventors: Tien V. Le, Walter E. Dubois, Brenda A. Raich, Bing Du, Sumathy Raman, Gawain J. Lau
  • Publication number: 20190278880
    Abstract: This disclosure generally relates to a methodology of effectively designing and/or discovering new materials based on microstructure, and more particularly, to designing and/or discovering new materials by combining material fundamentals and experimental data. The methodology disclosed herein provides cost-effective and time-effective solutions for material design that combine the benefits of both of the two major computational material design approaches: physics-based and data-driven computer models.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 12, 2019
    Inventors: Ning Ma, Niranjan A. Subrahmanya, Wei D. Liu, Sumathy Raman
  • Patent number: 10330659
    Abstract: A method is disclosed for determining for determining a presence, type, quality and/or volume of a subsurface hydrocarbon accumulation from a sample related thereto. The method may include determining a noble gas signature of a sample and at least one or more of determining a clumped isotope signature of the sample and characterizing the ecology signature of the sample. Then, the method integrates signatures to determine information about the subsurface accumulation, such as the location, fluid type and quality, and volume of a subsurface hydrocarbon accumulation.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: June 25, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Sebastien L. Dreyfus, Michael Lawson, Aaron B. Regberg, A. Lucie N'Guessan, Robert J. Pottorf, Steven R. May, Amelia C. Robinson, William G. Powell, Sumathy Raman
  • Publication number: 20190185397
    Abstract: Systems and methods are provided for direct methane conversion to methanol. The methods can include exposing methane to an oxidant, such as O2, in a solvent at conditions that are substantially supercritical for the solvent while having a temperature of about 310° C. or less, or about 300° C. or less, or about 290° C. or less. The solvent can correspond to an electron donor solvent that, when in a supercritical state, can complex with O2. By forming a complex with the O2, the supercritical electron donor solvent can facilitate conversion of methane to methanol at short residence times while reducing or minimizing further oxidation of the methanol to other products.
    Type: Application
    Filed: November 29, 2018
    Publication date: June 20, 2019
    Inventors: Partha NANDI, Steven L. SUIB, Sumathy RAMAN
  • Patent number: 10309217
    Abstract: A method is disclosed for producing hydrocarbons with the use of reservoir surveillance. The method includes interpreting a sample to determine noble gas signatures and clumped isotope signatures for the region of interest. Then, using the region of interest fingerprint to perform reservoir surveillance on produced fluids from the subsurface regions.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: June 4, 2019
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Michael Lawson, Robert J. Pottorf, Steven R. May, Amelia C. Robinson, Sumathy Raman, Sebastien L. Dreyfus, Cara L. Davis
  • Publication number: 20190078218
    Abstract: An electrochemical conversion method for converting at least a portion of a first mixture comprising hydrocarbon to C2+ unsaturates by repeatedly applying an electric potential difference, V(?1), to a first electrode of an electrochemical cell during a first time interval ?1; and reducing the electric potential difference, V(?1), to a second electric potential difference, V(?2), for a second time interval ?2, wherein ?2??1. The method is beneficial, among other things, for reducing coke formation in the electrochemical production of C2+ unsaturates in an electrochemical cell. Accordingly, a method of reducing coke formation in the electrochemical conversion of such mixtures and a method for electrochemically converting carbon to C2+ unsaturates as well as an apparatus for such methods are also provided.
    Type: Application
    Filed: March 2, 2018
    Publication date: March 14, 2019
    Inventors: Walter Weissman, Sumathy Raman, Mark A. Greaney
  • Publication number: 20190016969
    Abstract: A multi-stage process for upgrading tars is provided. A predominantly hydrotreating stage can be applied before a cracking stage, which can be a hydrocracking or a thermal cracking stage. Alternatively, a predominantly cracking stage, which can be a hydrocracking or a thermal cracking stage, can be applied before a hydrotreating stage. Apparatus suitable for performing the method is also provided.
    Type: Application
    Filed: July 2, 2018
    Publication date: January 17, 2019
    Inventors: Kapil Kandel, Bryan A. Patel, Sumathy Raman, John S. Coleman, Reyyan Koc-Karabocek, Teng Xu, Cyrus J. Rachal, Subramanya V. Nayak
  • Patent number: 10093597
    Abstract: In a process for separating one or more 3,3?-, 3,4?- and 4,4?-dimethyl biphenyl isomers, a feed comprising the isomers is contacted with an adsorbent containing a zeolite having a largest diffuse along dimension of at least 4 Angstroms. The adsorbents provide selective adsorption of 4,4?-dimethyl biphenyl.
    Type: Grant
    Filed: February 1, 2018
    Date of Patent: October 9, 2018
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Changyub Paek, Michael P. Lanci, Randall D. Partridge, Allen W. Burton, Peter I. Ravikovitch, Sumathy Raman
  • Patent number: 9932679
    Abstract: An electrochemical conversion method for converting at least a portion of a first mixture comprising hydrocarbon to C2+ unsaturates by repeatedly applying an electric potential difference, V(?1), to a first electrode of an electrochemical cell during a first time interval ?1; and reducing the electric potential difference, V(?1), to a second electric potential difference, V(?2), for a second time interval ?2, wherein ?2??1. The method is beneficial, among other things, for reducing coke formation in the electrochemical production of C2+ unsaturates in an electrochemical cell. Accordingly, a method of reducing coke formation in the electrochemical conversion of such mixtures and a method for electrochemically converting carbon to C2+ unsaturates as well as an apparatus for such methods are also provided.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: April 3, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Walter Weissman, Sumathy Raman, Mark A. Greaney
  • Patent number: 9856186
    Abstract: A process is described for converting at least one isomer of a dialkyl-substituted biphenyl compound, such as at least one 2,X? dialkylbiphenyl isomer (where X? is 2?, 3? and/or 4?), into at least one different isomer, 3,3?, 3,4? and/or 4,4? dialkylbiphenyl isomer. The process comprises contacting a feed comprising the dialkyl-substituted biphenyl compound isomer with an acid catalyst under isomerization conditions.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: January 2, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Michael Salciccioli, Jihad M. Dakka, Emiel de Smit, Neeraj Sangar, Scott J. Weigel, Sumathy Raman, Terry E. Helton, Lorenzo C. DeCaul, Christine N. Elia, Chuansheng Bai, Ranjita Ghose
  • Publication number: 20170362514
    Abstract: Systems and methods are provided for solvent deasphalting of steam cracker tar. The resulting deasphalted oil produced from the steam cracker tar can then be hydroprocessed, such as hydrotreated and/or hydrocracked in a fixed bed reactor. The solvent deasphalting can correspond to a mild or trim deasphalting or can correspond to solvent deasphalting at higher solvent to oil ratios. Performing a trim deasphalting can reduce or minimize the amount of deasphalting residue that is formed as a product from the deasphalting process.
    Type: Application
    Filed: May 26, 2017
    Publication date: December 21, 2017
    Inventors: Patrick L. Hanks, Anjaneya S. Kovvali, David T. Ferrughelli, Steven Pyl, Sumathy Raman
  • Patent number: 9612231
    Abstract: A method for detecting hydrocarbons is described. The method includes performing a remote sensing survey of a survey location to identify a target location. Then, an underwater vehicle (UV) is deployed into a body of water and directed to the target location. The UV collects measurement data within the body of water at the target location, which is then analyzed to determine whether hydrocarbons are present at the target location.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: April 4, 2017
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Robert J. Pottorf, Leonard J. Srnka, William Bond, Sebastien L. Dreyfus, Michael Lawson, William P. Meurer, Daniel P. Cherney, Steven R. May, William G. Powell, Christoper J. Vandewater, Mehmet D. Ertas, Sumathy Raman, Aaron B. Regberg, A. Lucie N'Guessan, Amelia C. Robinson, Kurt W. Rudolph
  • Publication number: 20160176785
    Abstract: A process is described for converting at least one isomer of a dialkyl-substituted biphenyl compound, such as at least one 2,X? dialkylbiphenyl isomer (where X? is 2?, 3? and/or 4?), into at least one different isomer, 3,3?, 3,4? and/or 4,4? dialkylbiphenyl isomer. The process comprises contacting a feed comprising the dialkyl-substituted biphenyl compound isomer with an acid catalyst under isomerization conditions.
    Type: Application
    Filed: December 2, 2015
    Publication date: June 23, 2016
    Inventors: Michael Salciccioli, Jihad M. Dakka, Emiel de Smit, Neeraj Sangar, Scott J. Weigel, Sumathy Raman, Terry E. Helton, Lorenzo C. DeCaul, Christine N. Ella, Chuansheng Bai, Ranjita Ghose