Patents by Inventor Doron Levin

Doron Levin 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: 7897825
    Abstract: This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7 aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: March 1, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Doron Levin
  • Publication number: 20100298117
    Abstract: This disclosure relates to a process for regenerating a catalyst composition, wherein the catalyst composition comprising a molecular sieve and at least 10 wt. % coke having a C/H ratio in the range of 0.26 to 5, the process comprising (a) contacting the catalyst composition with a first oxidative medium having oxygen and water at first conditions sufficient to form a first regenerated catalyst composition having at least 50 wt. % less coke than the catalyst composition; and then (b) contacting at least a portion of the first regenerated catalyst composition with a second oxidative medium having oxygen, and optionally water, at second conditions sufficient to form a second regenerated catalyst composition having at least 50 wt % less coke than the first regenerated catalyst composition, wherein the catalyst composition in step (a) and the first regenerated catalyst in step (b) have contacted total amount of water in the range of 1 to 50 weight water per weight of the second regenerated catalyst composition.
    Type: Application
    Filed: November 4, 2008
    Publication date: November 25, 2010
    Inventors: Doron Levin, James Harding Beech, JR., Selma SheungNam Kwok, Julia Elizabeth Steinheider
  • Patent number: 7829751
    Abstract: The present invention relates to processes for forming mixed alcohols containing methanol and ethanol. The mixed alcohol can then be used as a feedstock for an oxygenate to olefin reaction system for conversion thereof to ethylene, propylene, and the like. In addition, the olefins produced by the oxygenate to olefin reaction can then be used as monomers for a polymerization of olefin-containing polymers and/or oligomers.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: November 9, 2010
    Assignee: ExxonMobil Chemical Patents, Inc.
    Inventors: Doron Levin, Richard B. Hall
  • Patent number: 7799956
    Abstract: A process for producing phenol and methyl ethyl ketone comprises contacting benzene with a C4 alkylating agent under alkylation conditions with catalyst comprising zeolite beta or a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom to produce an alkylation effluent comprising sec-butylbenzene. The sec-butylbenzene is then oxidized to produce a hydroperoxide and the hydroperoxide is decomposed to produce phenol and methyl ethyl ketone.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: September 21, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jane Chi-ya Cheng, John S. Buchanan, Doron Levin, Michael A. Steckel, Jihad M. Dakka, James P. Stokes, John L. Robbins, Jon E. Stanat, Charles M. Smith, José G. Santiesteban
  • Publication number: 20100197978
    Abstract: The invention relates to the production of isopropyl alcohol (IPA) by direct hydration of propylene over mixed transition metal oxides co-precipitated with ZrO2. In embodiments the mixed metal oxides have improved hydrolytic stability and are active over a wider temperature range than existing direct hydration catalysts.
    Type: Application
    Filed: April 10, 2008
    Publication date: August 5, 2010
    Inventors: Jihad M. Dakka, Doron Levin, Stephen McCarthy, Travis Allen Reine, Mary Jo Schneider, James C. Vartuli, Charles M. Yarbrough
  • Patent number: 7763765
    Abstract: A gas-solids reaction system is provided for improving product recovery in a multiple reactor reaction system. An oxygenate feedstock, desirably of high concentration in oxygenate, is reacted with a catalyst having a low to modest acidity and a Si/Al2 ratio of from 0.10 to 0.32. The reaction occurs in a reaction zone of a fluidized bed reactor at an oxygenate partial pressure of at least 45 psia and a reactor gas superficial velocity of at least 10 ft/s, conveying catalyst through the reaction zone to a circulation zone. The catalyst undergoes displacement with an inert gas in the circulation zone at a displacement gas superficial velocity of at least 0.03 m/s, after which at least a portion, preferably a large portion is returned to the reaction zone. The catalyst has a residence time in the circulation zone of at least twice that of the residence time of catalyst in the reaction zone.
    Type: Grant
    Filed: January 26, 2007
    Date of Patent: July 27, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Keith H. Kuechler, James H. Beech, Doron Levin, Stephen N. Vaughn, Stephen H. Brown
  • Publication number: 20100093520
    Abstract: This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7 aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.
    Type: Application
    Filed: December 17, 2009
    Publication date: April 15, 2010
    Inventor: Doron Levin
  • Publication number: 20100094068
    Abstract: This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7 aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.
    Type: Application
    Filed: December 17, 2009
    Publication date: April 15, 2010
    Inventor: Doron Levin
  • Patent number: 7663010
    Abstract: This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7 aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: February 16, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Doron Levin
  • Publication number: 20090131726
    Abstract: The invention relates to a method of making Group 3 and Group 4 mixed metal oxide catalyst suitable for the decomposition of ethers to alkenes and alkanols. In an embodiment, it relates to a method of making a cerium-zirconium mixed metal oxide catalyst. In an embodiment, the catalyst made by the process of the invention is used for the production of isopropanol (IPA) from isopropyl ether (IPE).
    Type: Application
    Filed: November 17, 2008
    Publication date: May 21, 2009
    Inventors: James Clarke Vartuli, Doron Levin, Stephen John McCarthy
  • Publication number: 20090112034
    Abstract: This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7 aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.
    Type: Application
    Filed: October 10, 2008
    Publication date: April 30, 2009
    Inventor: Doron Levin
  • Patent number: 7468465
    Abstract: The invention relates to a method of making Group 3 and Group 4 mixed metal oxide catalyst suitable for the decomposition of ethers to alkenes and alkanols. In an embodiment, it relates to a method of making a cerium-zirconium mixed metal oxide catalyst. In an embodiment, the catalyst made by the process of the invention is used for the production of isopropanol (IPA) from isopropyl ether (IPE).
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: December 23, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: James Clarke Vartuli, Doron Levin, Stephen John McCarthy
  • Patent number: 7446232
    Abstract: In a process for oxidizing alkylaromatic compounds to the corresponding hydroperoxide, an alkylaromatic compound of general formula (I): in which R1 and R2 each independently represents an alkyl group having from 1 to 4 carbon atoms, provided that R1 and R2 may be joined to form a cyclic group having from 4 to 10 carbon atoms, said cyclic group being optionally substituted, and R3 represents hydrogen, one or more alkyl groups having from 1 to 4 carbon atoms or a cyclohexyl group, with oxygen in the presence of an added catalyst comprising tert-butyl hydroperoxide and in the absence of any other catalyst, to produce a hydroperoxide of general formula (II): in which R1, R2 and R3 have the same meaning as in formula (I). The hydroperoxide may then be converted into a phenol and a ketone of the general formula R1COCH2R2 (III), in which R1 and R2 have the same meaning as in formula (I).
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: November 4, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad Mohammed Dakka, Doron Levin, John Scott Buchanan, Jon Edmond Randolph Stanat
  • Patent number: 7435863
    Abstract: A porous crystalline material is described having the chabazite framework type and having a composition involving the molar relationship: X2O3:(n)YO2, wherein X is a trivalent element, such as aluminum, boron, iron, indium, and/or gallium; Y is a tetravalent element such as silicon, tin, titanium and/or germanium; and n is greater than 100 and typically greater than 200, such as about 300 to about 4000, for example from about 400 to about 1200. The material is synthesized in a fluoride medium and exhibits activity and selectivity in the conversion of methanol to lower olefins, especially ethylene and propylene.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: October 14, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Karl G. Strohmaier, Sebastian C. Reyes, Doron Levin
  • Patent number: 7411106
    Abstract: The invention relates to a catalyst composition, a method of making the same and its use in the conversion of a feedstock, preferably an oxygenated feedstock, into one or more olefin(s), preferably ethylene and/or propylene The catalyst composition comprises a molecular sieve and at least one metal oxide, such as a magnesium oxide that, when saturated with acetone and contacted with said acetone for 1 hour at 25° C., converts more than 80% of the acetone.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: August 12, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Teng Xu, Stephen N. Vaughn, Richard B. Hall, Doron Levin, James Clark Vartuli
  • Patent number: 7399891
    Abstract: This invention relates to a process for the production of an alcohol, the process comprising (a) reacting an olefin and water in the presence of a catalyst under conditions sufficient to form a crude alcohol stream comprising alcohol, and a dialkyl ether; (b) separating at least a portion of the crude alcohol stream into an alcohol-containing stream and a dialkyl ether stream; (c) contacting at least a portion of the dialkyl ether stream with an ether decomposition catalyst, the ether decomposition catalyst comprising a mixed metal oxide having the following composition XmYnZpOq where X is at least one metal selected from Group 4 of the Periodic Table of Elements, Y is at least one metal selected from Group 3 (including the Lanthanides and Actinides) and Group 6 of the Periodic Table of Elements and Z is at least one metal selected from Groups 7, 8, and 11 of the Periodic Table of Elements; m, n, p, and q are the atomic ratios of their respective components and, when m is 1, n is from about 0.01 to about 0.
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: July 15, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Charles M Yarbrough, Brian William Roberts, Dennis Jay Davoren, Kenneth Joseph Buturla, Carl Stotz Katzenstein, Doron Levin, Hans Georg Korsten, Vijay Swarup
  • Patent number: 7378563
    Abstract: The invention relates to a conversion process of a feedstock, preferably an oxygenated feedstock, into one or more olefin(s), preferably ethylene and/or propylene, in the presence of a molecular sieve catalyst composition that includes a molecular sieve and a Group 3 metal oxide and/or an oxide of a Lanthanide or Actinide series element. The invention is also directed to methods of making and formulating the molecular sieve catalyst composition useful in a conversion process of a feedstock into one or more olefin(s).
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: May 27, 2008
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Doron Levin, James Clark Vartuli
  • Publication number: 20080103345
    Abstract: The present invention relates to processes for forming mixed alcohols containing methanol and ethanol. The mixed alcohol can then be used as a feedstock for an oxygenate to olefin reaction system for conversion thereof to ethylene, propylene, and the like. In addition, the olefins produced by the oxygenate to olefin reaction can then be used as monomers for a polymerization of olefin-containing polymers and/or oligomers.
    Type: Application
    Filed: September 14, 2007
    Publication date: May 1, 2008
    Inventors: Doron Levin, Richard B. Hall
  • Publication number: 20080086018
    Abstract: A process for producing phenol and methyl ethyl ketone comprises contacting benzene with a C4 alkylating agent under alkylation conditions with catalyst comprising zeolite beta or a molecular sieve having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07 Angstrom to produce an alkylation effluent comprising sec-butylbenzene. The sec-butylbenzene is then oxidized to produce a hydroperoxide and the hydroperoxide is decomposed to produce phenol and methyl ethyl ketone.
    Type: Application
    Filed: August 5, 2005
    Publication date: April 10, 2008
    Inventors: Jane Cheng, John Buchanan, Doron Levin, Michael Steckel, Jihad Dakka, James Stokes, John Robbins, Jon Stanat, Charles Smith, Jose Santiesteban
  • Publication number: 20080033217
    Abstract: In a process for oxidizing alkylaromatic compounds to the corresponding hydroperoxide, an alkylaromatic compound of general formula (I): in which R1 and R2 each independently represents an alkyl group having from 1 to 4 carbon atoms, provided that R1 and R2 may be joined to form a cyclic group having from 4 to 10 carbon atoms, said cyclic group being optionally substituted, and R3 represents hydrogen, one or more alkyl groups having from 1 to 4 carbon atoms or a cyclohexyl group, is contacted with oxygen in the presence of an added catalyst comprising tert-butyl hydroperoxide and in the absence of any other catalyst, to produce a hydroperoxide of general formula (II): in which R1, R2 and R3 have the same meaning as in formula (I). The hydroperoxide may then be converted into a phenol and a ketone of the general formula R1COCH2R2 (III), in which R1 and R2 have the same meaning as in formula (I).
    Type: Application
    Filed: July 13, 2007
    Publication date: February 7, 2008
    Inventors: Jihad Mohammed Dakka, Doron Levin, John Scott Buchanan, Jon Edmond Randolph Stanat