Patents by Inventor Qianjun Chen
Qianjun Chen 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).
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Publication number: 20160168061Abstract: Methods and apparatuses for catalytically generating a polyol from biomass are provided. An exemplary method includes the steps of: contacting a feed stream comprising biomass to acid conditions in a first reaction zone, wherein the acid conditions in the first reaction zone are sufficient to hydrolyze a saccharide from the biomass to generate glucose; directing at least a first portion of a first effluent from the first reaction zone to a second reaction zone; and contacting the at least first portion of the first effluent with a first saccharide-to-polyol catalyst system under conditions suitable for catalytic conversion of saccharide to polyol.Type: ApplicationFiled: December 10, 2014Publication date: June 16, 2016Inventors: Tom N. Kalnes, John Qianjun Chen, Joseph Anthony Kocal
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Publication number: 20160145178Abstract: Methods and apparatuses for catalytically generating a polyol from whole biomass are provided. An exemplary method includes the steps of: depolymerizing at least a portion of lignin present in a stream that includes whole biomass; generating an effluent that includes depolymerized lignin and a saccharide; separating the effluent to generate a depolymerized lignin stream and a saccharide process stream, wherein the saccharide process stream includes a saccharide and an amount of lignin that is reduced relative to an amount of lignin present the effluent; and contacting the saccharide process stream with a saccharide-to-polyol catalyst system under conditions suitable for the catalytic conversion of saccharide to polyol.Type: ApplicationFiled: November 20, 2014Publication date: May 26, 2016Inventors: Tom N Kalnes, John Qianjun Chen, Joseph Anthony Kocal
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Publication number: 20140250773Abstract: Processes are disclosed that achieve a high conversion of lignin to aromatic hydrocarbons, and that may be carried out without the addition of a base. Depolymerization and deoxygenation, the desired lignin convention steps to yield aromatic hydrocarbons, are carried by contacting a mixture of lignin and a solvent (e.g., a lignin slurry) with hydrogen in the presence of a catalyst. A preferred solvent is a hydrogen transfer solvent such as a single-ring or fused-ring aromatic compound that beneficially facilitates depolymerization and hinders coke formation. These advantages result in favorable overall process economics for obtaining fuel components and/or chemicals from renewable sources.Type: ApplicationFiled: May 22, 2014Publication date: September 11, 2014Applicant: UOP LLCInventors: John Qianjun Chen, Mark Blaise Koch
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Publication number: 20140255264Abstract: Embodiments of methods and apparatuses for producing an aromatic hydrocarbon-containing effluent are provided herein. The method comprises the step of rapidly heating a biomass-based feedstock to a first predetermined temperature of from about 300 to about 650° C. in the presence of a catalyst, hydrogen, and an organic solvent within a time period of about 20 minutes or less to form the aromatic hydrocarbon-containing effluent. The biomass-based feedstock comprises lignocellulosic material, lignin, or a combination thereof.Type: ApplicationFiled: May 21, 2014Publication date: September 11, 2014Applicant: UOP LLCInventor: John Qianjun Chen
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Patent number: 8772557Abstract: Processes are disclosed that achieve a high conversion of lignin to aromatic hydrocarbons, and that may be carried out without the addition of a base. Depolymerization and deoxygenation, the desired lignin convention steps to yield aromatic hydrocarbons, are carried by contacting a mixture of lignin and a solvent (e.g., a lignin slurry) with hydrogen in the presence of a catalyst. A preferred solvent is a hydrogen transfer solvent such as a single-ring or fused-ring aromatic compound that beneficially facilitates depolymerization and hinders coke formation. These advantages result in favorable overall process economics for obtaining fuel components and/or chemicals from renewable sources.Type: GrantFiled: July 26, 2011Date of Patent: July 8, 2014Assignee: UOP LLCInventors: John Qianjun Chen, Mark Blaise Koch
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Patent number: 8772558Abstract: Embodiments of methods and apparatuses for producing an aromatic hydrocarbon-containing effluent are provided herein. The method comprises the step of rapidly heating a biomass-based feedstock to a first predetermined temperature of from about 300 to about 650° C. in the presence of a catalyst, hydrogen, and an organic solvent within a time period of about 20 minutes or less to form the aromatic hydrocarbon-containing effluent. The biomass-based feedstock comprises lignocellulosic material, lignin, or a combination thereof.Type: GrantFiled: July 26, 2011Date of Patent: July 8, 2014Assignee: UOP LLCInventor: John Qianjun Chen
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Publication number: 20130030228Abstract: Embodiments of methods and apparatuses for producing an aromatic hydrocarbon-containing effluent are provided herein. The method comprises the step of rapidly heating a biomass-based feedstock to a first predetermined temperature of from about 300 to about 650° C. in the presence of a catalyst, hydrogen, and an organic solvent within a time period of about 20 minutes or less to form the aromatic hydrocarbon-containing effluent. The biomass-based feedstock comprises lignocellulosic material, lignin, or a combination thereof.Type: ApplicationFiled: July 26, 2011Publication date: January 31, 2013Applicant: UOP LLCInventor: John Qianjun Chen
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Publication number: 20130025191Abstract: Processes are disclosed that achieve a high conversion of lignin to aromatic hydrocarbons, and that may be carried out without the addition of a base. Depolymerization and deoxygenation, the desired lignin convention steps to yield aromatic hydrocarbons, are carried by contacting a mixture of lignin and a solvent (e.g., a lignin slurry) with hydrogen in the presence of a catalyst. A preferred solvent is a hydrogen transfer solvent such as a single-ring or fused-ring aromatic compound that beneficially facilitates depolymerization and hinders coke formation. These advantages result in favorable overall process economics for obtaining fuel components and/or chemicals from renewable sources.Type: ApplicationFiled: July 26, 2011Publication date: January 31, 2013Applicant: UOP LLCInventors: JOHN QIANJUN CHEN, MARK KOCH
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Patent number: 6388159Abstract: A process for isomerising xylene using a new family of related crystalline aluminosilicate zeolites has been developed. These zeolites are represented by the empirical formula: Mmn+Rrp+Al(1−x)ExSiyOz where M is an alkali or alkaline earth metal such as lithium and strontium, R is a nitrogen containing organic cation such as tetramethyl-ammonium and E is a framework element such as gallium.Type: GrantFiled: November 3, 2000Date of Patent: May 14, 2002Assignee: UOP LLCInventors: Deng-Yang Jan, Gregory J. Lewis, Jaime G. Moscoso, Mark A. Miller, Qianjun Chen
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Patent number: 6358400Abstract: A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a large-pore molecular-sieve catalyst containing a uniformly distributed platinum-group metal component, and a tin component incorporated into the large-pore molecular sieve by secondary synthesis. The use of this catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.Type: GrantFiled: May 25, 1999Date of Patent: March 19, 2002Assignee: UOP LLCInventors: Paula L. Bogdan, Qianjun Chen, Jaime G. Moscoso, Jeffery C. Bricker
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Patent number: 6280608Abstract: This invention relates to a layered catalyst composition, a process for preparing the composition and processes for using the composition. The catalyst composition comprises an inner core such as alpha-alumina, and an outer layer bonded to the inner core composed of an outer refractory inorganic oxide such as gamma-alumina. The outer layer has uniformly dispersed thereon a platinum group metal such as platinum and a promoter metal such as tin. The composition also contains a modifier metal such as lithium. The catalyst composition shows improved durability and selectivity for dehydrogenating hydrocarbons.Type: GrantFiled: May 30, 2000Date of Patent: August 28, 2001Assignee: UOP LLCInventors: Robert H. Jensen, Jeffery C. Bricker, Qianjun Chen, Masaru Tatsushima, Kenji Kikuchi, Masao Takayama, Koji Hara, Isao Tsunokuma, Hiroyuki Serizawa
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Patent number: 6177601Abstract: An aromatization process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a large-pore molecular-sieve catalyst containing a uniformly distributed platinum-group metal component, and a tin component incorporated into the large-pore molecular sieve by secondary synthesis. The use of this catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.Type: GrantFiled: May 25, 1999Date of Patent: January 23, 2001Assignee: UOP LLCInventors: Paula L. Bogdan, Qianjun Chen, Jaime G. Moscoso, Jeffery C. Bricker
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Patent number: 6177381Abstract: This invention relates to a layered catalyst composition, a process for preparing the composition and processes for using the composition. The catalyst composition comprises an inner core such as alpha-alumina, and an outer layer bonded to the inner core composed of an outer refractory inorganic oxide such as gamma-alumina. The outer layer has uniformly dispersed thereon a platinum group metal such as platinum and a promoter metal such as tin. The composition also contains a modifier metal such as lithium. The catalyst composition shows improved durability and selectivity for dehydrogenating hydrocarbons.Type: GrantFiled: November 3, 1998Date of Patent: January 23, 2001Assignee: UOP LLCInventors: Robert H Jensen, Jeffrey C. Bricker, Qianjun Chen, Masaru Tatsushima, Kenji Kikuchi, Masao Takayama, Koji Hara, Isao Tsunokuma, Hiroyuki Serizawa
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Patent number: 6132595Abstract: A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing a uniformly distributed platinum-group metal component, a surface-layer metal component comprising one or more of the Group IVA metals, indium, Group VIIB (IUPAC 7) metals, iron, zinc, gold and bismuth and a nonacidic large-pore molecular sieve. The use of this bed of catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.Type: GrantFiled: March 23, 1999Date of Patent: October 17, 2000Assignee: UOP LLCInventors: Paula L. Bogdan, Qianjun Chen
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Patent number: 6066251Abstract: A catalyst system comprising a physical mixture of particles of a non-acidic large-pore zeolite containing a platinum-group metal and particles comprising a refractory inorganic oxide which is metal-free is effective for the reforming of a hydrocarbon feedstock. Reforming of paraffinic feedstocks to effect aromatization, particularly of a raffinate from aromatics extraction, provides improved activity in producing gasoline-range products when using the catalyst system of the invention.Type: GrantFiled: December 15, 1998Date of Patent: May 23, 2000Assignee: UOP LLCInventors: Qianjun Chen, Paula L. Bogdan
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Patent number: 5885443Abstract: A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing a uniformly distributed platinum-group metal component, a surface-layer metal component comprising one ore more of the Group IVA metals and indium and a nonacidic large-pore molecular sieve. The use of this bed of catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.Type: GrantFiled: June 17, 1998Date of Patent: March 23, 1999Assignee: UOP LLCInventors: Paula L. Bogdan, Qianjun Chen
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Patent number: 5883032Abstract: A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing a uniformly distributed platinum-group metal component, a surface-layer metal component comprising one one more of the Group IVA metals and indium and a nonacidic large-pore molecular sieve. The use of this bed of catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.Type: GrantFiled: November 21, 1996Date of Patent: March 16, 1999Assignee: UOP LLCInventors: Paula L. Bogdan, Qianjun Chen
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Patent number: 5880051Abstract: A catalyst system comprising a physical mixture of particles of a non-acidic large-pore zeolite containing a platinum-group metal and particles comprising a refractory inorganic oxide which is metal-free is effective for the reforming of a hydrocarbon feedstock. Reforming of paraffinic feedstocks to effect aromatization, particularly of a raffinate from aromatics extraction, provides improved activity in producing gasoline-range products when using the catalyst system of the invention.Type: GrantFiled: October 23, 1996Date of Patent: March 9, 1999Assignee: UOP LLCInventors: Qianjun Chen, Paula L. Bogdan
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Patent number: 5559068Abstract: Reforming is effected with a combination of a primary supported noble-metal catalyst and a catalyst containing one or more medium-pore non-zeolitic molecular sieves (MP-NZMS). The latter reforming and dehydrocyclization catalysts comprise a Group VIII metal and at least one bound MP-NZMS characterized in the calcined form by an adsorption of isobutane of at least 2 percent by weight at a partial pressure of 500 torr and a temperature of 20.degree. C. and characterized by an adsorption of triethylamine less than about 5 percent by weight at a partial pressure of 2.6 torr and a temperature of 22.degree. C. The MP-NZMS catalyst binder preferably is alumina and/or silica, and the Group VIII metal preferably is platinum.Type: GrantFiled: May 12, 1995Date of Patent: September 24, 1996Assignee: UOPInventors: Qianjun Chen, Peter K. Coughlin, Regis J. Pellet
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Patent number: 5520796Abstract: Reforming is effected with a combination of a primary supported noble-metal catalyst and a catalyst containing one or more medium pore non-zeolite molecular sieves (MP-NZMS). The latter reforming and dehydrocyclization comprise a Group VIII metal and at least one bound MP-NZMS characterized in the calcined form by an adsorption of isobutane of at least 2 percent by weight at a partial pressure of 500 torr and a temperature of 20.degree. C. and characterized by an adsorption of triethylamine less than about 5 percent by weight at a partial pressure of 2.6 torr and a temperature of 22.degree. C., The MP-NZMS catalyst binder preferably is alumina and/or silica, and the Group VIII metal preferably is platinum.Type: GrantFiled: September 13, 1994Date of Patent: May 28, 1996Assignee: UOPInventors: Qianjun Chen, Peter K. Coughlin, Regis J. Pellet