Patents by Inventor Jihad M. Dakka

Jihad M. Dakka 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: 10287230
    Abstract: A process for selective oxidation of dimethyl-1,1?-biphenyl(s) to form methyl-1,1?-biphenyl mono-carboxylic acid(s), which can be esterified to form plasticizers, comprising contacting a solution of dimethyl-1,1?-biphenyl(s) in acetic acid in the presence of an oxidation catalyst and air under time and temperature conditions sufficient to oxidize the dimethyl-1,1?-biphenyl(s) into one or more methyl-1,1?-biphenyl mono-carboxylic acid(s) products, conducting at least one of (i) adding an antisolvent, or (ii) optimizing a total conversion of dimethyl-1,1?-biphenyl(s) by oxidation based upon a molar ratio of dimethyl-1,1?-biphenyl isomers, or (iii) precipitating the methyl-1,1?-biphenyl mono-carboxylic acid(s) products by lowering the temperature, or (iv) decreasing the oxidation reaction temperature to enhance conversion of aldehydes over methyl functional groups, so as to limit over-oxidation of the dimethyl-1,1?-biphenyl(s), wherein the oxidation reaction is conducted in the absence of bromide-containing cata
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: May 14, 2019
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Michael P. Lanci, Joshua W. Allen, Jarid M. Metz, Victor DeFlorio, Jihad M. Dakka, Bryan A. Patel, Michael Salciccioli, Michael W. Weber, Stephen Zushma
  • Patent number: 10259765
    Abstract: Disclosed are novel processes for making cyclohexanone compositions, from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene. The process includes hydrogenation of a feed stream comprising phenol, cyclohexanone, and cyclohexylbenzene. The feed stream may be subjected to one or more pre-hydrogenation treatments, such as passing through one or more sorbents, addition of basic chemical agents, and/or addition of water, so as to improve catalyst activity, minimize undesired side reactions, and/or remove catalyst poisons from the feed stream. The feed stream may be provided to a hydrogenation reaction zone in the vapor phase, with periodic alterations to hydrogenation reaction conditions such that the feed is provided in mixed liquid and vapor phase in order to carry out liquid washing of a hydrogenation catalyst bed within the hydrogenation reaction zone.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: April 16, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M. Dakka, Ashley J. Malik, Christopher L. Becker, Jason D. Davis, Kirk C. Nadler, Jose M. Vargas, Tan-Jen Chen, Seth M. Washburn, Jörg F. W. Weber
  • Patent number: 10252968
    Abstract: Disclosed are novel processes for making cyclohexanone compositions, from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene. The process includes hydrogenation of a feed stream comprising phenol, cyclohexanone, and cyclohexylbenzene. The feed stream may be subjected to one or more pre-hydrogenation treatments, such as passing through one or more sorbents, addition of basic chemical agents, and/or addition of water, so as to improve catalyst activity, minimize undesired side reactions, and/or remove catalyst poisons from the feed stream. The feed stream may be provided to a hydrogenation reaction zone in the vapor phase, with periodic alterations to hydrogenation reaction conditions such that the feed is provided in mixed liquid and vapor phase in order to carry out liquid washing of a hydrogenation catalyst bed within the hydrogenation reaction zone.
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: April 9, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M. Dakka, Ashley J. Malik, Christopher L. Becker, Jason D. Davis, Kirk C. Nadler, Jose M. Vargas, Tan-Jen Chen, Seth M. Washburn, Jörg F. W. Weber
  • Patent number: 10233140
    Abstract: Disclosed are processes and systems for making cyclohexanone from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene, comprising a step of or a device for subjecting at least a portion of the mixture to hydrogenation and a step of or a device for distilling a phenol/cyclohexanone/cyclohexylbenzene mixture to obtain an effluent rich in cyclohexanone.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: March 19, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Christopher L. Becker, Jason D. Davis, Jihad M. Dakka, Kirk C. Nadler
  • Publication number: 20190022631
    Abstract: Catalyst compositions with improved alkylation activity and corresponding methods for making such catalyst compositions are provided. The catalyst(s) correspond to solid acid catalysts formed by exposing a catalyst precursor with a zeolitic framework structure to a molten metal salt that includes fluorine, such as a molten metal fluoride. The resulting fluorinated solid acid catalysts can have improved alkylation activity while having a reduced or minimized amount of structural change due to the exposure to the molten metal fluoride. This is in contrast to fluorinated solid acid catalysts that are exposed to higher severity forms of fluorination, such as exposure to ammonium fluoride or HF. SnF2 is an example of a suitable molten metal fluoride.
    Type: Application
    Filed: June 26, 2018
    Publication date: January 24, 2019
    Inventors: Partha Nandi, Matthew S. Ide, Jihad M. Dakka, Quddus A. Nizami, Mobae Afeworki
  • Patent number: 10160708
    Abstract: Integrated methods and systems are disclosed for the production of dimethyl ether. The method may include reforming natural gas to syngas in a first reactor; contacting the syngas produced in the first reactor with a catalyst system in a second reactor to produce dimethyl ether and carbon dioxide; and supplying steam as a cofeed to at least one of the first reactor and the second reactor in an amount sufficient to achieve a Mm value of 1.4 to 1.8 or to improve the hydrocarbon or oxygenate selectivity.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: December 25, 2018
    Assignee: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Anita S. Lee, Jihad M. Dakka, Arun K. Sharma, Michel Daage, Preeti Kamakoti, Ronald Suryo, Chuansheng Bai, J. Timothy Cullinane
  • Publication number: 20180273457
    Abstract: Disclosed are novel processes for making cyclohexanone compositions, from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene. The process includes hydrogenation of a feed stream comprising phenol, cyclohexanone, and cyclohexylbenzene. The feed stream may be subjected to one or more pre-hydrogenation treatments, such as passing through one or more sorbents, addition of basic chemical agents, and/or addition of water, so as to improve catalyst activity, minimize undesired side reactions, and/or remove catalyst poisons from the feed stream. The feed stream may be provided to a hydrogenation reaction zone in the vapor phase, with periodic alterations to hydrogenation reaction conditions such that the feed is provided in mixed liquid and vapor phase in order to carry out liquid washing of a hydrogenation catalyst bed within the hydrogenation reaction zone.
    Type: Application
    Filed: June 17, 2016
    Publication date: September 27, 2018
    Inventors: Jihad M. Dakka, Ashley J. Malik, Christopher L. Becker, Jason D. Davis, Kirk C. Nadler, Jose M. Vargas, Tan-Jen Chen, Seth M. Washburn, Jörg F.W Weber
  • Patent number: 10081593
    Abstract: Provided are compounds of the following: wherein R1 is a saturated or unsaturated cyclic hydrocarbon optionally substituted with an alkyl and/or an OXO-ester, and R2 is a C4 to C14 hydrocarbyl, preferably the residue of a C4 to C14 OXO-alcohol. Also provided are processes for making the compounds and plasticized polymer compositions containing said compounds.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: September 25, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M. Dakka, Christine A. Costello, Edmund J. Mozeleski, Stephen Zushma, Diana S. Smirnova, Catherine A. Faler, Victor DeFlorio
  • Patent number: 10053408
    Abstract: Disclosed are processes for making cyclohexanone from a mixture comprising phenol, cyclohexanone, cyclohexylbenzene, and an S-containing component, comprising a step of removing at least a portion of the S-containing component to reduce poisoning of a hydrogenation catalyst used for hydrogenating phenol to cyclohexanone.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: August 21, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Keith H. Kuechler, Jörg F. W. Weber, Ashley J. Poucher, Jason D. Davis, Christopher L. Becker, Jihad M. Dakka
  • Publication number: 20180222819
    Abstract: A hydrocarbon conversion process is described. The process includes contacting in a reactor an inert gas with one or more catalyst compositions suitable for methylation of toluene and hydrogenation of phenol; contacting a reducing agent with the one or more catalyst compositions under conditions suitable for reducing metal oxide content of the catalyst composition; contacting at least part of toluene and/or benzene-containing with a oxygenate in the presence of the one or more catalyst compositions and under conditions effective to convert toluene to xylenes and produce a reactor effluent stream comprising para-xylene and having a lower concentration of phenol than the toluene-containing stream; separating at least one para-xylene-enriched stream from the reactor effluent stream; and separating from the at least one para-xylene enriched stream at least one toluene-enriched stream and at least one para-xylene-product stream. An apparatus for carrying out such a process is also described.
    Type: Application
    Filed: March 30, 2018
    Publication date: August 9, 2018
    Applicant: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M. Dakka, Robert G. Tinger
  • Publication number: 20180194705
    Abstract: Disclosed are novel processes for making cyclohexanone compositions, from a mixture comprising phenol, cyclohexanone, and cyclohexylbenzene. The process includes hydrogenation of a feed stream comprising phenol, cyclohexanone, and cyclohexylbenzene. The feed stream may be subjected to one or more pre-hydrogenation treatments, such as passing through one or more sorbents, addition of basic chemical agents, and/or addition of water, so as to improve catalyst activity, minimize undesired side reactions, and/or remove catalyst poisons from the feed stream. The feed stream may be provided to a hydrogenation reaction zone in the vapor phase, with periodic alterations to hydrogenation reaction conditions such that the feed is provided in mixed liquid and vapor phase in order to carry out liquid washing of a hydrogenation catalyst bed within the hydrogenation reaction zone.
    Type: Application
    Filed: June 17, 2016
    Publication date: July 12, 2018
    Inventors: Jihad M. Dakka, Ashley J. Malik, Christopher L. Becker, Jason D. Davis, Kirk C. Nadler, Jose M. Vargas, Tan-Jen Chen, Seth M. Washburn, Jörg F.W. Weber
  • Patent number: 10011538
    Abstract: A method for the purification of an aromatic hydrocarbon process stream having phenol therein is disclosed. Aspects of the method include contacting at least a portion of the aromatic hydrocarbon process stream with a hydrogenation catalyst under hydrogenation conditions to provide a hydrogenation effluent having a lower concentration of phenol than said aromatic hydrocarbon process stream.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: July 3, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M. Dakka, Robert G. Tinger
  • Publication number: 20180179138
    Abstract: A process for selective oxidation of dimethyl-1,1?-biphenyl to form methyl-1,1?-biphenyl mono-carboxylic acid(s), comprising contacting a solution of dimethyl-1,1?-biphenyl in acetic acid solvent in the presence of a Co(II) acetate catalyst and air, and optionally adding a co-solvent, or adding sodium or potassium acetate, and oxidizing the dimethyl-1,1?-biphenyl under time and temperature conditions sufficient to form one or more methyl-1,1?-biphenyl mono-carboxylic acid(s). The mono-carboxylic acids are advantageously isolated and esterified to form biphenyl mono-esters for use as plasticizers.
    Type: Application
    Filed: December 1, 2017
    Publication date: June 28, 2018
    Inventors: Michael P. LANCI, Joshua W. ALLEN, Jarid M. METZ, Victor DeFLORIO, Jihad M. DAKKA, Bryan A. PATEL, Michael SALCICCIOLI, Michael W. WEBER, Stephen ZUSHMA
  • Publication number: 20180179141
    Abstract: A process for selective oxidation of dimethyl-1,1?-biphenyl(s) to form methyl-1,1?-biphenyl mono-carboxylic acid(s), which can be esterified to form plasticizers, comprising contacting a solution of dimethyl-1,1?-biphenyl(s) in acetic acid in the presence of an oxidation catalyst and air under time and temperature conditions sufficient to oxidize the dimethyl-1,1?-biphenyl(s) into one or more methyl-1,1?-biphenyl mono-carboxylic acid(s) products, conducting at least one of (i) adding an antisolvent, or (ii) optimizing a total conversion of dimethyl-1,1?-biphenyl(s) by oxidation based upon a molar ratio of dimethyl-1,1?-biphenyl isomers, or (iii) precipitating the methyl-1,1?-biphenyl mono-carboxylic acid(s) products by lowering the temperature, or (iv) decreasing the oxidation reaction temperature to enhance conversion of aldehydes over methyl functional groups, so as to limit over-oxidation of the dimethyl-1,1?-biphenyl(s), wherein the oxidation reaction is conducted in the absence of bromide-containing cata
    Type: Application
    Filed: December 1, 2017
    Publication date: June 28, 2018
    Inventors: Michael P. LANCI, Joshua W. ALLEN, Jarid M. METZ, Victor DeFLORIO, Jihad M. DAKKA, Bryan A. PATEL, Michael SALCICCIOLI, Michael W. WEBER, Stephen ZUSHMA
  • Publication number: 20180170838
    Abstract: A process for upgrading an ethane-containing C5? paraffin stream comprises contacting the paraffin stream with an oxygen containing gas in the presence of a selective oxidation catalyst under conditions to selectively oxidize at least part of the ethane in the paraffin stream and produce a first product stream comprising ethylene. At least part of the first product stream may then be contacted with an isoparaffin-containing feed in the presence of a solid alkylation catalyst and under conditions to alkylate at least part of the isoparaffin with at least part of the ethylene and produce a second product stream comprising C6+ alkylate. Alternatively, at least part of the ethylene in the first product stream may be dimerized before the alkylation step.
    Type: Application
    Filed: December 7, 2017
    Publication date: June 21, 2018
    Inventors: Guang CAO, Jihad M. DAKKA
  • Publication number: 20180162788
    Abstract: Systems and methods are provided for forming alkylate from a tertiary alcohol feed. Olefins for the alkylation reaction can be generated from a portion of the tertiary alcohol feed. The tertiary alcohol feed can be obtained, for example, by selective oxidation to convert a portion of an isoparaffin-containing feed into alcohol, such as conversion of isobutane to t-butyl alcohol. The alcohol can then be converted to an alkene, such as conversion of t-butyl alcohol to isobutene, in the alkylation reaction environment in the presence of a solid acid catalyst. The solid acid catalyst can then facilitate dimerization of the alkenes (e.g. isobutene) to form C8+ olefins (e.g. isooctene). A catalyst having an MWW framework is an example of a suitable solid acid catalyst.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 14, 2018
    Inventors: Jihad M. Dakka, David B. Spry, Cynthia F. Omilian, Matthew S. Ide, Jenna L. Walp, Ralph C. Dehaas
  • Publication number: 20180162786
    Abstract: Systems and methods are provided for forming alkylate from an isoparaffin-containing feed. Olefins for the alkylation reaction can be generated from a portion of the isoparaffin-containing feed. This can be achieved, for example, by using selective oxidation to convert a portion of isoparaffins into alcohol, such as conversion of isobutane to t-butyl alcohol. The alcohol can then be converted to an alkene, such as conversion of t-butyl alcohol to isobutene, in the alkylation reaction environment in the presence of a solid acid catalyst. The solid acid catalyst can then facilitate alkylation of isoparaffin using the in-situ formed alkenes. A catalyst having an MWW framework is an example of a suitable solid acid catalyst.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 14, 2018
    Inventors: Jihad M. DAKKA, Guang CAO, Patrick L. HANKS, James R. BIELENBERG, Cynthia F. OMILIAN, Jessica M. WITTMANN
  • Publication number: 20180162789
    Abstract: Methods and systems for converting hydrocarbons including exposing a portion of a hydroperoxide-containing feed including tert-butyl hydroperoxide to a solid deperoxidation catalyst under decomposition conditions to form an oxidation effluent comprising tert-butyl alcohol, wherein the solid deperoxidation catalyst comprises a manganese oxide octahedral molecular sieve, are provided herein. Further methods and systems for converting the oxidation effluent to an alkylation product are also provided herein.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 14, 2018
    Inventors: Sophie LIU, Jihad M. DAKKA, Partha NANDI, Sara YACOB, Quddus A. NIZAMI, Chuansheng BAI
  • Publication number: 20180162787
    Abstract: Systems and methods are provided for production of high octane hydrocarbon from an isoparaffin feed using oxidation acid catalysis chemistry.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 14, 2018
    Inventors: Jihad M. DAKKA, Matthew S. IDE, David B. SPRY, Sumod KALAKKUNNATH, Guang CAO, Patrick L. HANKS, Cynthia F. OMILIAN
  • Patent number: 9963403
    Abstract: A hydrocarbon conversion process is described. The process includes contacting in a reactor an inert gas with one or more catalyst compositions suitable for methylation of toluene and hydrogenation of phenol; contacting a reducing agent with the one or more catalyst compositions under conditions suitable for reducing metal oxide content of the catalyst composition; contacting at least part of toluene and/or benzene-containing with a oxygenate in the presence of the one or more catalyst compositions and under conditions effective to convert toluene to xylenes and produce a reactor effluent stream comprising para-xylene and having a lower concentration of phenol than the toluene-containing stream; separating at least one para-xylene-enriched stream from the reactor effluent stream; and separating from the at least one para-xylene enriched stream at least one toluene-enriched stream and at least one para-xylene-product stream. An apparatus for carrying out such a process is also described.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: May 8, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M Dakka, Robert G. Tinger