Patents by Inventor C. Cheng

C. Cheng 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: 7939693
    Abstract: A process for producing sec-butylbenzene comprises feeding reactants comprising benzene and a C4 olefin to a distillation column reactor having a first reaction zone containing an alkylation catalyst and a second distillation zone, which is located below said first reaction zone and which is substantially free of alkylation catalyst, wherein the ratio of the number of distillation stages in said first reaction zone to the number of distillation stages in said second distillation zone is less than 1:1. Concurrently in the distillation reactor, the reactants are contacted with the alkylation catalyst in the first reaction zone under conditions such that the C4 olefin reacts with the benzene to produce sec-butylbenzene and the sec-butylbenzene is fractioned from the unreacted C4 olefin. The sec-butylbenzene thereby passes as a liquid phase stream from the first reaction zone to the second distillation zone and the liquid phase steam is withdrawn from the distillation column reactor as bottoms.
    Type: Grant
    Filed: July 11, 2008
    Date of Patent: May 10, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jane C. Cheng, Jihad M. Dakka, Travis A. Reine, Jon E. Stanat
  • Publication number: 20110097039
    Abstract: Disclosed herewith a interconnection system includes an optoelectronic receptacle connector including insulative housing defines a cylindrical receiving chamber having a front and a rear end. An aligning pin extends from the rear end into the chamber and with an optical receiver disposed in the chamber. An optoelectronic plug connector includes a jack member defining a passage to receive the aligning pin when the plug connector is inserted into the receptacle connector. An organizer is enveloped on the jack member and defines at least a pair of orifices aligned with the optical receiver. And an optoelectronic cable includes at least a pair of fiber optics disposed within the orifices of the organizer and at least a conductive wires terminated to the jack member.
    Type: Application
    Filed: October 28, 2009
    Publication date: April 28, 2011
    Inventors: Jim Zhao, Andrew C. Cheng
  • Publication number: 20110077438
    Abstract: This disclosure relates to a process for manufacturing a mono-cycloalkyl-substituted aromatic compound, said process comprising contacting a feedstock comprising an aromatic compound and hydrogen under hydroalkylation reaction conditions with a catalyst system comprising a molecular sieve, wherein said molecular sieve comprises a framework of tetrahedral atoms bridged by oxygen atoms, the tetrahedral atom framework being defined by a unit cell with atomic coordinates in nanometers shown in Table 2.
    Type: Application
    Filed: July 15, 2009
    Publication date: March 31, 2011
    Inventors: Wieslaw J. Roth, Terry E. Helton, Jane C. Cheng, Michael J. Brennan
  • Publication number: 20110071329
    Abstract: This disclosure relates to a process for manufacturing a mono-cycloalkyl-substituted aromatic compound, said process comprising contacting a feedstock comprising an aromatic compound and hydrogen under hydroalkylation reaction conditions with a catalyst system comprising a molecular sieve and at least one metal with hydrogenation activity, wherein said molecular sieve has, in its as-synthesized form and in calcined form, an X-ray diffraction pattern including peaks having a d-spacing maximum in the range of 14.17 to 12.57 Angstroms, a d-spacing maximum in the range of 12.1 to 12.56 Angstroms.
    Type: Application
    Filed: July 15, 2009
    Publication date: March 24, 2011
    Inventors: Wieslaw J. Roth, Terry E. Helton, Jane C. Cheng, Michael J. Brennan
  • Patent number: 7910779
    Abstract: In a process for producing cyclohexylbenzene, benzene and hydrogen are fed to at least one reaction zone. The benzene and hydrogen are then contacted in the at least one reaction zone under hydroalkylation conditions with a catalyst system comprising 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, and at least one hydrogenation metal to produce an effluent containing cyclohexylbenzene. The catalyst system has an acid-to-metal molar ratio of from about 75 to about 750.
    Type: Grant
    Filed: October 14, 2010
    Date of Patent: March 22, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Tan-Jen Chen, Jane C. Cheng, Terry E. Helton, John Scott Buchanan
  • Patent number: 7910785
    Abstract: This disclosure relates to a process for hydrocarbon conversion comprising contacting, under conversion conditions, a feedstock suitable for hydrocarbon conversion with a catalyst comprising an EMM-10 family molecular sieve.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: March 22, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Wieslaw J. Roth, Jane C. Cheng, Mohan Kalyanaraman, Michael C. Kerby, Terry E. Helton
  • Patent number: 7906685
    Abstract: In a process for producing cyclohexylbenzene, benzene and hydrogen are fed to at least one reaction zone. The benzene and hydrogen are then contacted in the at least one reaction zone under hydroalkylation conditions with a catalyst system comprising 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, and at least one hydrogenation metal to produce an effluent containing cyclohexylbenzene. The ratio of the total number of moles of hydrogen fed to said at least one reaction zone to the number of moles of benzene fed to said at least one reaction zone is between 0.4 and 0.9:1.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: March 15, 2011
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Tan-Jen Chen, Francisco M. Benitez, Jane C. Cheng, Jon E. Stanat, John Scott Buchanan
  • Publication number: 20110044940
    Abstract: The present invention relates to novel Heterocyclic Ether or Thioether Derivatives, compositions comprising the Heterocyclic Ether or Thioether Derivatives, and methods for using the Heterocyclic Ether or Thioether Derivatives for treating or preventing a proliferative disorder, an anti-proliferative disorder, inflammation, arthritis, a central nervous system disorder, a cardiovascular disease, alopecia, a neuronal disease, an ischemic injury, a viral infection, a fungal infection, or a disorder related to the activity of a protein kinase.
    Type: Application
    Filed: October 27, 2008
    Publication date: February 24, 2011
    Inventors: Gerald W. Shipps, JR., Matthew Richards, Cliff C. Cheng, Xiaohua Huang
  • Publication number: 20110037022
    Abstract: In a process for producing phenol and/or cyclohexanone, benzene and hydrogen are contacted with a first catalyst in a hydroalkylation step to produce a first effluent stream comprising cyclohexylbenzene, cyclohexane, and unreacted benzene. At least part of the first effluent stream is supplied to a first separation system to divide the first effluent stream part into a cyclohexylbenzene-rich stream and a C6 product stream comprising unreacted benzene and cyclohexane.
    Type: Application
    Filed: March 16, 2009
    Publication date: February 17, 2011
    Applicant: EXXONMOBIL CHEMICAL PATENTS INC.
    Inventors: Jihad M. Dakka, J. Scott Buchanan, Jane C. Cheng, Tan-Jen Chen, Lorenzo C. Decaul, Terry E. Helton, Jon E. Stanat, Francisco M. Benitez
  • Publication number: 20110028762
    Abstract: In a process for producing cyclohexylbenzene, benzene and hydrogen are fed to at least one reaction zone. The benzene and hydrogen are then contacted in the at least one reaction zone under hydroalkylation conditions with a catalyst system comprising 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, and at least one hydrogenation metal to produce an effluent containing cyclohexylbenzene. The catalyst system has an acid-to-metal molar ratio of from about 75 to about 750.
    Type: Application
    Filed: October 14, 2010
    Publication date: February 3, 2011
    Inventors: Tan-Jen CHEN, Jane C. Cheng, Terry E. Helton, John Scott Buchanan
  • Publication number: 20110021841
    Abstract: In a process for producing cyclohexylbenzene, benzene and hydrogen are contacted with a catalyst under hydroalkylation conditions to produce an effluent containing cyclohexylbenzene. The catalyst comprises a composite of a molecular sieve, an inorganic oxide different from said molecular sieve and at least one hydrogenation metal, wherein at least 50 wt % of said hydrogenation metal is supported on the inorganic oxide and the inorganic oxide has an average particle size less than 40 ?m (microns).
    Type: Application
    Filed: February 23, 2009
    Publication date: January 27, 2011
    Inventors: Tan-Jen Chen, Jane C. Cheng, Francisco M. Benitez, Terry E. Helton, Jon E. Stanat
  • Publication number: 20110015457
    Abstract: In a process for producing cyclohexylbenzene, benzene and hydrogen are contacted under hydroalkylation conditions with a catalyst system comprising a MCM-22 family molecular sieve and at least one hydrogenation metal. The conditions comprise a temperature of about 140° C. to about 175° C., a pressure of about 135 psig to about 175 psig (931 kPag to 1207 kPag), a hydrogen to benzene molar ratio of about 0.30 to about 0.65 and a weight hourly space velocity of benzene of about 0.26 to about 1.05 hr?1.
    Type: Application
    Filed: February 24, 2009
    Publication date: January 20, 2011
    Inventors: Jane C. Cheng, Tan-Jen Chen, Prasenjeet Ghosh
  • Patent number: 7858832
    Abstract: A process for producing sec-butylbenzene comprises contacting a feed comprising benzene and a C4 alkylating agent under alkylation conditions comprising a temperature of about 110° C. to about 150° C. with a catalyst comprising at least one 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. The sec-butylbenzene can be then oxidized to produce a hydroperoxide and the hydroperoxide decomposed to produce phenol and methyl ethyl ketone.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: December 28, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jane C. Cheng, John S. Buchanan, Jon E. Stanat, Christine N. Elia, Jihad M. Dakka
  • Publication number: 20100317896
    Abstract: A process for producing sec-butylbenzene comprises feeding reactants comprising benzene and a C4 olefin to a distillation column reactor having a first reaction zone containing an alkylation catalyst and a second distillation zone, which is located below said first reaction zone and which is substantially free of alkylation catalyst, wherein the ratio of the number of distillation stages in said first reaction zone to the number of distillation stages in said second distillation zone is less than 1:1. Concurrently in the distillation column reactor, the reactants are contacted with the alkylation catalyst in the first reaction zone under conditions such that the C4 olefin reacts with the benzene to produce sec-butylbenzene and the sec-butylbenzene is fractionated from the unreacted C4 olefin. The sec-butylbenzene thereby passes as a liquid phase stream from the first reaction zone to the second distillation zone and the liquid phase stream is withdrawn from the distillation column reactor as bottoms.
    Type: Application
    Filed: July 11, 2008
    Publication date: December 16, 2010
    Inventors: Jane C. Cheng, Jihad M. Dakka, Travis A. Reine, Jon E. Stanat
  • Publication number: 20100317895
    Abstract: In a process for producing cyclohexylbenzene, hydrogen and a liquid feed comprising benzene are introduced into a reaction zone and are contacted in the reaction zone under hydroalkylation conditions to produce cyclohexylbenzene. An effluent stream comprising cyclohexylbenzene and unreacted benzene is removed from the reaction zone and is divided into at least first and second portions, wherein the mass ratio of the effluent stream first portion to the effluent stream second portion is at least 2:1. The effluent stream first portion is then cooled and the cooled effluent stream first portion is recycled to the reaction zone.
    Type: Application
    Filed: January 13, 2009
    Publication date: December 16, 2010
    Inventors: John S. Buchanan, Jane C. Cheng, Tan-Jen Chen, James R. Lattner
  • Patent number: 7847128
    Abstract: In a process for producing cyclohexylbenzene, benzene and hydrogen are fed to at least one reaction zone. The benzene and hydrogen are then contacted in the at least one reaction zone under hydroalkylation conditions with a catalyst system comprising 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, and at least one hydrogenation metal to produce an effluent containing cyclohexylbenzene. The catalyst system has an acid-to-metal molar ratio of from about 75 to about 750.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: December 7, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Tan-Jen Chen, Jane C. Cheng, Terry E. Helton, John Scott Buchanan
  • Publication number: 20100298617
    Abstract: Disclosed herein is a process and catalyst for producing an ethylbenzene feed from a polyethylbenzene feed, comprising the step of contacting a benzene feed with a polyethylbenzene feed under at least partial liquid phase conditions in the presence of a zeolite beta catalyst having a phosphorus content in the range of 0.01 wt. % to 0.5 wt. % of said catalyst, to provide a product which comprises ethylbenzene.
    Type: Application
    Filed: July 29, 2010
    Publication date: November 25, 2010
    Inventors: Michael C. Clark, Jane C. Cheng, Ajit B. Dandekar
  • Publication number: 20100292847
    Abstract: A patient positioning system for use with a radiation therapy system that monitors the location of fixed and movable components and pre-plans movement of the movable components so as to inhibit movement if a collision would be indicated. The positioning system can also coordinate movement of multiple movable components for reduced overall latency in registering a patient. The positioning system includes external measurement devices which measure the location and orientation of objects, including components of the radiation therapy system, in space and can also monitor for intrusion into the active area of the therapy system by personnel or foreign objects to improve operational safety of the radiation therapy system.
    Type: Application
    Filed: June 28, 2010
    Publication date: November 18, 2010
    Applicant: Loma Linda University Medical Center
    Inventors: Chieh C. Cheng, David A. Lesyna, Michael F. Moyers
  • Patent number: 7834218
    Abstract: A process for producing phenol and methyl ethyl ketone comprises contacting benzene and a C4 alkylating agent under alkylation conditions and in the presence of an alkylation catalyst comprising at least one molecular sieve of the MCM-22 family to produce an alkylation effluent comprising secbutylbenzene; wherein the contacting is conducted in a plurality of reaction zones and the C4 alkylating agent secbutylbenzene fraction is recovered from the alkylation effluent and comprises at least 95 wt % sec-butylbenzene, less than 100 wt ppm of C8+ olefins, and less than 0.5 wt % of isobutylbenzene and tert-butylbenzene. The sec-butylbenzene fraction is then oxidized to produce sec-butylbenzene hydroperoxide and the hydroperoxide is cleaved to produce phenol and methyl ethyl ketene.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: November 16, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M. Dakka, Jon E. Stanat, Francisco M. Benitez, John S. Buchanan, Jane C. Cheng, Jeffrey T. Elks
  • Patent number: 7812196
    Abstract: A process for producing phenol and methyl ethyl ketone comprises contacting benzene and a C4 olefin under alkylation conditions and in the presence of an alkylation catalyst to produce an alkylation effluent comprising sec-butylbenzene and C8+ olefins. The alkylation effluent is then treated to reduce the amount of said C8+ olefins and produce a treated effluent, whereafter the sec-butylbenzene in the treated effluent is oxidized to produce a hydroperoxide and the hydroperoxide is cleaved to produce phenol and methyl ethyl ketone.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: October 12, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Jihad M. Dakka, Edmund J. Mozeleski, Jane C. Cheng, Francisco M. Benitez, Jon E. Stanat, John S. Buchanan