Patents by Inventor Lubo Zhou

Lubo Zhou 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: 20210139399
    Abstract: Processes of producing cresols from a phenols containing feed are described. The processes involve a combination of dealkylation and transalkylation processes. The dealkylation process converts the heavy alkylphenols in an alkylphenols stream to phenol and olefins. The olefins produced in the dealkylation process are separated out. The methylphenols, which are not converted in the dealkylation process, and phenol react in the transalkylation process to generate cresols.
    Type: Application
    Filed: February 4, 2019
    Publication date: May 13, 2021
    Inventors: Shuguang Zhang, Lubo Zhou
  • Patent number: 10919826
    Abstract: An improved isobutanol synthesis process is provided which proceeds through the formation of mixed alcohols from syngas. The two-step process avoids the slowest ?-carbon addition reaction in the conventional one-step, direct isobutanol synthesis process. Once ethanol and propanol are produced in the first reaction zone, they can react with methanol and/or syngas in a second reaction zone to produce isobutanol through the fast ?-carbon addition reaction in the presence of catalysts, resulting on significantly improved isobutanol productivity.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: February 16, 2021
    Assignees: China Petroleum & Chemical Corporation, UOP LLC
    Inventors: Richard Long, Tian Ruan, Lubo Zhou, Jinbiao Guo
  • Patent number: 10723675
    Abstract: Processes and apparatus for making xylenes and phenol are described. Phenol and alkyl phenols are separated from coal derived liquid. The phenol is separated from the alkyl phenols. The alkyl phenols can be reacted with aromatics such as benzene and toluene to make xylenes. The xylenes and other aromatics are then separated from the phenol and alkyl phenols. Para-xylene is separated and recovered using a xylene separation process, and meta-xylene and ortho-xylene are optionally converted to para-xylene through an isomerization reaction.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: July 28, 2020
    Assignees: China Petroleum & Chemical Corporation, UOP LLC
    Inventors: Lubo Zhou, Shuguang Zhang
  • Patent number: 10683246
    Abstract: A process is provided for separation of light olefins and paraffins and particular for the separation of propylene and propane comprising sending at least one olefin/paraffin stream to a distillation column and a membrane unit to produce an olefin stream comprising at least 92 mol % olefin. In an embodiment of the invention where the membrane unit is placed downstream from the column which can produce propylene streams at polymer grade of over 99.5 mol % propylene.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: June 16, 2020
    Assignee: UOP LLC
    Inventors: Chunqing Liu, Lubo Zhou, Stanley J. Frey, Gregory R. Werba, Carl W. Liskey, Simon E. Albo, Trung Pham
  • Publication number: 20200039905
    Abstract: An improved isobutanol synthesis process is provided which proceeds through the formation of mixed alcohols from syngas. The two-step process avoids the slowest ?-carbon addition reaction in the conventional one-step, direct isobutanol synthesis process. Once ethanol and propanol are produced in the first reaction zone, they can react with methanol and/or syngas in a second reaction zone to produce isobutanol through the fast ?-carbon addition reaction in the presence of catalysts, resulting on significantly improved isobutanol productivity.
    Type: Application
    Filed: October 4, 2019
    Publication date: February 6, 2020
    Inventors: Richard LONG, Tian RUAN, Lubo ZHOU, Jinbiao GUO
  • Publication number: 20200031741
    Abstract: Processes and apparatus for making xylenes and phenol are described. Phenol and alkyl phenols are separated from coal derived liquid. The phenol is separated from the alkyl phenols. The alkyl phenols can be reacted with aromatics such as benzene and toluene to make xylenes. The xylenes and other aromatics are then separated from the phenol and alkyl phenols. Para-xylene is separated and recovered using a xylene separation process, and meta-xylene and ortho-xylene are optionally converted to para-xylene through an isomerization reaction.
    Type: Application
    Filed: October 4, 2019
    Publication date: January 30, 2020
    Inventors: Lubo Zhou, Shuguang Zhang
  • Patent number: 10281209
    Abstract: A reboiler in fluid communication with a fractionator column in an offshore low temperature process removing carbon dioxide from natural gas has a vessel volume. A carbon steel tubing bundle is disposed within the vessel volume. Each tube in the bundle has an outer surface with a porous granular metal layer deposited thereon. The granular metal layer comprises a pore size distribution which promotes bubble nucleation during vaporization of a nearly pure liquid carbon dioxide stream.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: May 7, 2019
    Assignee: UOP LLC
    Inventors: Lubo Zhou, Thomas J. Godry, Zhanping Xu
  • Publication number: 20190100479
    Abstract: A process is provided for separation of light olefins and paraffins and particular for the separation of propylene and propane comprising sending at least one olefin/paraffin stream to a distillation column and a membrane unit to produce an olefin stream comprising at least 92 mol % olefin. In an embodiment of the invention where the membrane unit is placed downstream from the column which can produce propylene streams at polymer grade of over 99.5 mol % propylene.
    Type: Application
    Filed: August 8, 2018
    Publication date: April 4, 2019
    Inventors: Chunqing Liu, Lubo Zhou, Stanley J. Frey, Gregory R. Werba, Carl W. Liskey, Simon E. Albo, Trung Pham
  • Publication number: 20180326348
    Abstract: Solvent absorption processes for separating components of an impure feed gas are disclosed. The processes involve two stages of gas purification. The acid gases including hydrogen sulfide, carbon dioxide and other sulfur compounds are simultaneously removed from the feed gas by contact with a physical solvent in two stages. The subject matter disclosed provide improved processes and apparatus to reduce the operating costs of the system.
    Type: Application
    Filed: July 25, 2018
    Publication date: November 15, 2018
    Inventors: Nikunj Tanna, Xiaoming Wen, Lubo Zhou
  • Publication number: 20180126328
    Abstract: A method for conditioning natural gas into fuel gas, where the method includes the step of: delivering a natural gas stream including both CO2 and C2+ hydrocarbons to a membrane separation assembly; and separating the natural gas stream into the following streams: (i) a first permeate stream, (ii) a second permeate stream, and (iii) a residual stream. The first permeate stream includes CO2 removed from the natural gas stream. The second permeate stream includes methane at a greater concentration than a concentration of methane in the natural gas stream. The residual stream contains C2+ hydrocarbons at a greater concentration than a concentration of C2+ hydrocarbons in the natural gas stream.
    Type: Application
    Filed: January 9, 2018
    Publication date: May 10, 2018
    Inventors: Lubo Zhou, Parag Jain
  • Publication number: 20180106535
    Abstract: A reboiler in fluid communication with a fractionator column in an offshore low temperature process removing carbon dioxide from natural gas has a vessel volume. A carbon steel tubing bundle is disposed within the vessel volume. Each tube in the bundle has an outer surface with a porous granular metal layer deposited thereon. The granular metal layer comprises a pore size distribution which promotes bubble nucleation during vaporization of a nearly pure liquid carbon dioxide stream.
    Type: Application
    Filed: December 19, 2017
    Publication date: April 19, 2018
    Inventors: Lubo Zhou, Thomas J. Godry, Zhanping Xu
  • Patent number: 9914090
    Abstract: Vapor-liquid contacting apparatuses and methods for removing contaminants from gas streams are provided. In an embodiment, a vapor-liquid contacting apparatus includes a vortex contacting stage having a contacting zone bound by a wall and defining an axis, a radially inner region surrounding the axis, and a radially outer region adjacent the wall. The vapor-liquid contacting apparatus also includes a feed conduit configured to direct flow of a feed gas into the radially outer region of the contacting zone in a direction tangential to the axis to form a vortex. Further, the vapor-liquid contacting apparatus includes a liquid conduit configured to deliver a liquid absorbent stream to the radially inner region in the contacting zone.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: March 13, 2018
    Assignee: UOP LLC
    Inventors: Lev Davydov, Xiaoming Wen, Lubo Zhou
  • Patent number: 9731243
    Abstract: A low pressure re-absorber is integrated with a sulfur-rich solvent flash drum or a sulfur-rich solvent stripping column in a solvent acid gas removal process that provides for sufficient sulfur concentration for the downstream sulfur recovery unit. In another aspect of the invention, carbon dioxide containing or carbon dioxide rich gas streams that are at a lower temperature relative to a lean solvent stream are used to cool those lean solvent streams and then optionally to cool other process streams, to save energy consumption.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: August 15, 2017
    Assignee: UOP LLC
    Inventors: Xiaoming Wen, Edward P. Zbacnik, Saadet Ulas Acikgoz, Lubo Zhou
  • Patent number: 9682343
    Abstract: Sour syngas treatment apparatuses and processes for treating a sour syngas stream are provided herein. In an embodiment, a process for treating a sour syngas stream that includes sulfur components and carbon dioxide includes absorbing the sulfur components and carbon dioxide from the sour syngas stream in a primary liquid/vapor phase absorption stage with a solvent to produce a liquid absorbent stream. The liquid absorbent stream includes the solvent, the sulfur components, and carbon dioxide. A portion of the sulfur components from the liquid absorbent stream is directly oxidized in the presence of a direct oxidation catalyst to produce elemental sulfur and a recycle stream. The recycle stream includes an unconverted portion of the sulfur components and carbon dioxide. The recycle stream is recycled for further absorption of the unconverted portion of the sulfur components and carbon dioxide through liquid/vapor phase absorption.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: June 20, 2017
    Assignee: UOP LLC
    Inventors: Lubo Zhou, Bart Beuckels, Ernest James Boehm
  • Patent number: 9528062
    Abstract: The invention involves a process for treating a natural gas stream comprising sending the natural gas stream first to an adsorbent unit for removal of mercury. Then the gas stream is sent to an absorbent unit containing a chemical solvent and a physical solvent for removal of carbon dioxide, hydrogen sulfide, carbonyl sulfide and organic sulfur compounds to produce a partially purified natural gas stream. This stream is dehydrated and becomes the product stream. The partially purified natural gas stream to a dehydration unit to remove water to produce a natural gas product stream. The impurities absorbed by the absorption unit are removed and a liquid stream is separated that contains the sulfur impurities. This liquid stream may be purified and stabilized before being shipped for further treatment.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: December 27, 2016
    Assignee: UOP LLC
    Inventors: Shain-Jer Doong, Lubo Zhou
  • Patent number: 9518239
    Abstract: A process for the removal of sulfur compounds from a feed stream. A first separation zone removes sulfur compounds and produces a partially cleaned stream. A first adsorption zone adsorbs the remaining organic sulfur compounds on a regenerable adsorbent a produces a treated gas stream. A portion of the treated gas stream may regenerate the adsorbent in the first adsorption zone by removing organic sulfur compounds. The organic sulfur compound rich stream can be passed to a non-regenerable adsorption zone. The non-regenerable adsorption zone will separate out the organic sulfur compounds and provide a re-treated gas stream which may be recycled to a portion of the process. The non-regenerable adsorption zone may include regenerable adsorbent, but the zone is not operated to regenerate the adsorbent while it is in the non-regenerable adsorption zone.
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: December 13, 2016
    Assignee: UOP LLC
    Inventors: Shain-Jer Doong, Jayant Kumar Gorawara, Lubo Zhou
  • Patent number: 9505683
    Abstract: A process for treatment of a natural gas stream, or other methane containing stream that passes through a guard bed for removal of mercury and hydrolysis of COS, followed by treatment with an absorbent unit containing an amine solvent for removal of carbon dioxide and hydrogen sulfide. The gas is then dried by a molecular sieve bed. The regeneration gas for the molecular sieve adsorbent bed is chilled to remove liquid hydrocarbons and sulfur compounds. The process is accomplished without the use of an absorbent unit to remove the sulfur compounds.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: November 29, 2016
  • Publication number: 20160296878
    Abstract: Sour syngas treatment apparatuses and processes for treating a sour syngas stream are provided herein. In an embodiment, a process for treating a sour syngas stream that includes sulfur components and carbon dioxide includes absorbing the sulfur components and carbon dioxide from the sour syngas stream in a primary liquid/vapor phase absorption stage with a solvent to produce a liquid absorbent stream. The liquid absorbent stream includes the solvent, the sulfur components, and carbon dioxide. A portion of the sulfur components from the liquid absorbent stream is directly oxidized in the presence of a direct oxidation catalyst to produce elemental sulfur and a recycle stream. The recycle stream includes an unconverted portion of the sulfur components and carbon dioxide. The recycle stream is recycled for further absorption of the unconverted portion of the sulfur components and carbon dioxide through liquid/vapor phase absorption.
    Type: Application
    Filed: April 9, 2015
    Publication date: October 13, 2016
    Inventors: Lubo Zhou, Bart Beuckels, Ernest James Boehm
  • Patent number: 9453174
    Abstract: Methods and apparatuses for removing impurities from a hydrocarbon stream are provided herein. In an embodiment, a method for removing impurities from a hydrocarbon stream includes providing the hydrocarbon stream that includes carbon dioxide in an amount of greater than about 50 ppm by mole. Carbon dioxide is selectively adsorbed from the hydrocarbon stream to produce a treated hydrocarbon stream that has less than or equal to 50 ppm by mole of carbon dioxide. The adsorbed carbon dioxide is desorbed to produce a raffinate stream that includes the carbon dioxide. The carbon dioxide is separated from the raffinate stream using a solvent separation technique to produce a treated raffinate stream.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: September 27, 2016
    Assignee: UOP LLC
    Inventors: Saadet Ulas Acikgoz, Shain Doong, Lubo Zhou, Bhargav Sharma
  • Publication number: 20160032206
    Abstract: A process for the removal of sulfur compounds from a feed stream. A first separation zone removes sulfur compounds and produces a partially cleaned stream. A first adsorption zone adsorbs the remaining organic sulfur compounds on a regenerable adsorbent a produces a treated gas stream. A portion of the treated gas stream may regenerate the adsorbent in the first adsorption zone by removing organic sulfur compounds. The organic sulfur compound rich stream can be passed to a non-regenerable adsorption zone. The non-regenerable adsorption zone will separate out the organic sulfur compounds and provide a re-treated gas stream which may be recycled to a portion of the process. The non-regenerable adsorption zone may include regenerable adsorbent, but the zone is not operated to regenerate the adsorbent while it is in the non-regenerable adsorption zone.
    Type: Application
    Filed: July 29, 2014
    Publication date: February 4, 2016
    Inventors: Shain-Jer Doong, Jayant Kumar Gorawara, Lubo Zhou