Patents by Inventor Yunkui Li
Yunkui Li 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: 20210069680Abstract: An oxygen storage material (OSM) that exhibits enhanced redox properties, developed mesoporosity, and a resistance to sintering. The oxygen storage material (OSM) has a high oxygen storage capacity (i.e., OSC>1.5 mmol H2/g) and enhanced reducibility (i.e., bimodal TPR-H2 profile with two Tmax in the temperature range from 150° C. to 550° C.). The OSM is suitable for use as a catalyst and a catalyst support. The method of making the oxygen storage material comprises the preparation of a solution containing zirconium, cerium, rare earth and transition metal salts, followed by the co-precipitation of all constituent metal hydroxides with a base.Type: ApplicationFiled: January 7, 2019Publication date: March 11, 2021Inventors: Anatoly Bortun, Mila Bortun, David Shepard, Yunkui Li, Jin Cho, Wei Wu, Jeffery Lachapelle
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Publication number: 20210071558Abstract: A method of making an oxygen storage material (OSM) with developed mesoporosity having a small fraction of pores <10 nm (fresh or aged), and resistance to thermal sintering is provided. This OSM is suitable for use as a catalyst and catalyst support. The method of making this oxygen storage material (OSM) includes the preparation of a solution containing pre-polymerized zirconium oligomers, cerium, rare earth and transition metal salts; the interaction of this solution with a complexing agent that has an affinity towards zirconium; the formation of a zirconium-based precursor; and the co-precipitation of all constituent metal hydroxide with abase.Type: ApplicationFiled: January 7, 2019Publication date: March 11, 2021Inventors: Anatoly Bortun, Mila Bortun, David Shepard, Yunkui Li, Jin Cho, Wei Wu, Jeffery Lachapelle
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Patent number: 10882755Abstract: Mesoporous, zirconium-based mixed oxides and a method of making the same comprises: injecting a polyvalent metal-containing solution into an electrolyte solution to form a mother liquor; forming a precipitate; aging the precipitate in the mother liquor to form the mixed oxides; washing the mixed oxides with an aqueous medium; drying and collecting the mixed oxides. The pH of the electrolyte solution exceeds the isoelectric point for zirconium-based mixed oxides. The mixed oxides exhibit a single particle size distribution, improved Ce02 reducibility in the presence of Rhodium, a decrease in surface area after calcination (800-1100° C.) that is not more than 55%, and a tetragonal/cubic structure after calcination. After calcination at 1100° C. for 10 hours in air, the mixed oxides exhibit a surface area >25 m2/g, a pore volume >0.20 cm3/g, an average pore size >30 nm, and an average crystallite size between 8-15 nm.Type: GrantFiled: March 30, 2017Date of Patent: January 5, 2021Assignee: Pacific Industrial Development CorporationInventors: Anatoly Bortun, David Shepard, Yunkui Li, Wei Wu, Jeffery Lachapelle
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Publication number: 20190336954Abstract: A crystalline, core-shell hybrid Chabazite (CHA) material for use as a catalyst has a core with a silicon to aluminum ratio (SAR) that is less than 25 and a shell that at least partially encapsulates the core, the shell having an SAR of about 25 or greater. The crystalline, core-shell hybrid Chabazite is prepared by forming a first chabazite (CHA) material having a silicon to aluminum ratio (SAR) that is less than 25, placing the first CHA material into an aqueous reaction mixture comprising one or more precursors capable of forming a second chabazite (CHA) material having an SAR that is 25 or greater, growing the second CHA material on the surface of the first CHA material, and collecting the core-shell hybrid CHA material.Type: ApplicationFiled: May 1, 2018Publication date: November 7, 2019Inventors: Wei Wu, Geng Zhang, De Gao, David Shepard, Yunkui Li, Jeffery Lachapelle
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Patent number: 10328421Abstract: The present disclosure generally provides novel STT-type zeolite materials called PIDC-120501, PIDC-120502, and PIDC-120805/120806 or PIDC-type zeolites and a method of making these zeolites. The present disclosure also provides for the use of these zeolite materials as a catalyst and a method of preparing said catalyst. The PIDC-type zeolites or STT-type zeolite materials may be used as a catalyst, such as in Selective Catalytic Reduction (SCR) applications.Type: GrantFiled: March 26, 2015Date of Patent: June 25, 2019Assignee: Pacific Industrial Development CorporationInventors: Manjola Mancka, Yunkui Li, Jeffery LaChapelle, Wei Wu, David Shepard
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Publication number: 20190112198Abstract: Mesoporous, zirconium-based mixed oxides and a method of making the same comprises: injecting a polyvalent metal-containing solution into an electrolyte solution to form a mother liquor; forming a precipitate; aging the precipitate in the mother liquor to form the mixed oxides; washing the mixed oxides with an aqueous medium; drying and collecting the mixed oxides. The pH of the electrolyte solution exceeds the isoelectric point for zirconium-based mixed oxides. The mixed oxides exhibit a single particle size distribution, improved Ce02 reducibility in the presence of Rhodium, a decrease in surface area after calcination (800-1 100° C.) that is not more than 55%, and a tetragonal/cubic structure after calcination. After calcination at 1 100° C. for 10 hours in air, the mixed oxides exhibit a surface area >25 m2/g, a pore volume >0.20 cm3/g, an average pore size >30 nm, and an average crystallite size between 8-15 nm.Type: ApplicationFiled: March 30, 2017Publication date: April 18, 2019Inventors: Anatoly Bortun, David Shepard, Yunkui Li, Wei Wu, Jeffery Lachapelle
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Patent number: 10232348Abstract: A catalyst support material (D-CZMLA) with oxygen storage capacity corresponds to the formula vD:x(Ce1-wZrwO2):yM:zL:(1-v-x-y-z)Al2O3, wherein w is a molar ratio between 0.1-0.8 and v, x, y, and z are weight ratios, such that v is between 0.005-0.15, x is between 0.05-0.80, and y and z are between 0.001-0.10. M is an interactive promoter for oxygen storage, L is a stabilizer (L) for the Al2O3 support; and D is an oxidizing dopant. The catalyst support material can be incorporated into a wash coat that combines platinum group metals (PGM), an adhesive, and a mixture of (?)RE-Ce—ZrO2+(?)CZMLA+(1????)RE-Al2O3, wherein RE-Ce—ZrO2 is a rare earth element stabilized ceria zirconia having a weight ratio (?) between 0-0.7; CZMLA is the doped catalyst support material having a weight ratio (?) between 0.2-1, such that (?+?)?1; and RE-Al2O3 is rare earth element stabilized alumina having a weight ratio equal to (1????).Type: GrantFiled: June 16, 2016Date of Patent: March 19, 2019Assignee: Pacific Industrial Development CorporationInventors: Wei Wu, Yunkui Li, Jeffery Lachapelle, David Shepard
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Patent number: 10137411Abstract: A method of preparing a crystalline STT-type zeolite that has a mole ratio greater than about 15:1 of a tetravalent element oxide to a trivalent element oxide is disclosed along with a gas treatment system that incorporates the STT-type zeolite and a process for treating a gas using the STT-type zeolite. The method generally comprises forming an aqueous mixture comprising a tetravalent element oxide source, a trivalent element oxide source, a source of alkali metal, and an organic structure directing agent; maintaining the mixture under conditions that crystallize crystals of a STT-type zeolite; and recovering the crystals The STT-type zeolite crystals exhibit x-ray diffraction 2-theta degree peaks at: 8.26, 8.58, 9.28, 9.54, 10.58, 14.52, 15.60, 16.43, 17.13, 17.74, 18.08, 18.46, 19.01, 19.70, 20.12, 20.38, 20.68, 21.10, 21.56, 22.20, 22.50, 22.78, 23.36, 23.76, 23.99, 24.54, 24.92, 25.16, 25.58, 25.80, 26.12, 26.94, 27.38, 27.92, 28.30, 28.60, 29.24, 29.48, 30.08, 30.64, 31.20, 31.46, 31.80, 32.02, 32.Type: GrantFiled: March 26, 2015Date of Patent: November 27, 2018Assignee: Pacific Industrial Development CorporationInventors: Manjola Mancka, Yunkui Li, Jeffery Lachapelle, Wei Wu
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Patent number: 10065177Abstract: A catalyst support material and a catalyst system incorporating said support material along with a method of making the same is provided for use in applications in which the support material is exposed to sulfur-containing impurities. The catalyst support material generally comprises an inorganic oxide base material having a surface and pores of predetermined size; and a zirconium layer adapted to interact with the surface and sized to be received by the pores of the base material. The catalyst support material being prepared by applying a layer of a zirconium compound to the surface and pores of an inorganic oxide base material followed by calcination in order to convert the zirconium compound to a metal, a metal oxide, or a mixture thereof.Type: GrantFiled: October 4, 2011Date of Patent: September 4, 2018Assignee: Pacific Industrial Development CorporationInventors: Wei Wu, Yunkui Li, Jeffery Lachapelle, Christopher Sketch, Evan Leonard, William Germond
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Patent number: 9597666Abstract: A wash coat is formed by combining platinum group metals (PGM) and an adhesive with a mixture of catalyst support materials according to the relationship (?)RE-Ce—ZrO2+(?)CZMLA+(1????)RE-Al2O3. The RE-Ce—ZrO2 is a commercial material of rare earth elements stabilized ceria zirconia having a weight ratio (?) ranging from 0 to about 0.7; CZMLA is a catalyst support material comprising a core support powder coated with a solid solution and has a weight ratio (?) ranging from about 0.2 to about 1 such that (?+?)?1. RE-Al2O3 is rare earth element stabilized alumina having a weight ratio equal to (1????). The wash coat exhibits a lower activation temperature compared with traditional wash coat formulations by at least 50° C. This wash coat also requires less RE-Ce—ZrO2 oxide and/or less PGM in the formulation for use as an emission control catalyst for gasoline and diesel engines.Type: GrantFiled: June 10, 2016Date of Patent: March 21, 2017Assignee: Pacific Industrial Development CorporationInventors: Wei Wu, Yunkui Li, Jeffery Lachapelle
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Publication number: 20170043294Abstract: A method of preparing a crystalline STT-type zeolite that has a mole ratio greater than about 15:1 of a tetravalent element oxide to a trivalent element oxide is disclosed along with a gas treatment system that incorporates the STT-type zeolite and a process for treating a gas using the STT-type zeolite. The method generally comprises forming an aqueous mixture comprising a tetravalent element oxide source, a trivalent element oxide source, a source of alkali metal, and an organic structure directing agent; maintaining the mixture under conditions that crystallize crystals of a STT-type zeolite; and recovering the crystals The STT-type zeolite crystals exhibit x-ray diffraction 2-theta degree peaks at: 8.26, 8.58, 9.28, 9.54, 10.58, 14.52, 15.60, 16.43, 17.13, 17.74, 18.08, 18.46, 19.01, 19.70, 20.12, 20.38, 20.68, 21.10, 21.56, 22.20, 22.50, 22.78, 23.36, 23.76, 23.99, 24.54, 24.92, 25.16, 25.58, 25.80, 26.12, 26.94, 27.38, 27.92, 28.30, 28.60, 29.24, 29.48, 30.08, 30.64, 31.20, 31.46, 31.80, 32.02, 32.Type: ApplicationFiled: March 26, 2015Publication date: February 16, 2017Inventors: Manjola Mancka, Yunkui Li, Jeffery LaChapelle, Wei Wu
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Publication number: 20160346764Abstract: A wash coat is formed by combining platinum group metals (PGM) and an adhesive with a mixture of catalyst support materials according to the relationship (?)RE-Ce—ZrO2+(?)CZMLA+(1????)RE-Al2O3. The RE-Ce—ZrO2 is a commercial material of rare earth elements stabilized ceria zirconia having a weight ratio (?) ranging from 0 to about 0.7; CZMLA is a catalyst support material comprising a core support powder coated with a solid solution and has a weight ratio (?) ranging from about 0.2 to about 1 such that (?+?)?1. RE-Al2O3 is rare earth element stabilized alumina having a weight ratio equal to (1????). The wash coat exhibits a lower activation temperature compared with traditional wash coat formulations by at least 50° C. This wash coat also requires less RE-Ce—ZrO2 oxide and/or less PGM in the formulation for use as an emission control catalyst for gasoline and diesel engines.Type: ApplicationFiled: June 10, 2016Publication date: December 1, 2016Inventors: Wei Wu, Yunkui Li, Jeffery Lachapelle
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Publication number: 20160296910Abstract: A catalyst support material (D-CZMLA) with oxygen storage capacity corresponds to the formula vD:x(Ce1-wZrwO2):yM:zL:(1?v?x?y?z)Al2O3, wherein w is a molar ratio between 0.1-0.8 and v, x, y, and z are weight ratios, such that v is between 0.005-0.15, x is between 0.05-0.80, and y and z are between 0.001-0.10. M is an interactive promoter for oxygen storage, L is a stabilizer (L) for the Al2O3 support; and D is an oxidizing dopant. The catalyst support material can be incorporated into a wash coat that combines platinum group metals (PGM), an adhesive, and a mixture of (?)RE-Ce—ZrO2+(?)CZMLA+(1????)RE-Al2O3, wherein RE-Ce—ZrO2 is a rare earth element stabilized ceria zirconia having a weight ratio (?) between 0-0.7; CZMLA is the doped catalyst support material having a weight ratio (?) between 0.2-1, such that (?+?)?1; and RE-Al2O3 is rare earth element stabilized alumina having a weight ratio equal to (1????).Type: ApplicationFiled: June 16, 2016Publication date: October 13, 2016Inventors: Wei Wu, Yunkui Li, Jeffery Lachapelle, David Shepard
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Patent number: 9387461Abstract: A new type of catalyst support with oxygen storage capacity (OSC) and methods of making the same are disclosed. The composition ratio is x(Ce1?wZrwO2):yM:zL:(1?x?y?z)Al2O3, where Ce1?wZrwO2 is the oxygen storage composition with stabilizer Zr02, molar ratio (w) in the range of 0 to about 0.8, and a weight ratio (x) of about 0.05 to about 0.8; M is an interactive promoter for oxygen storage capacity with a weight ratio (y) of 0 to about 0.10; and L is a stabilizer for the support Al2O3 with weight ratio (z) of from 0 to about 0.10. In some cases, M or L can act as both OSC promoter and thermal stabilizer. The weight percentage range of ceria-zirconia and other metal and rare earth oxides (x+y+z) is from about 5 to about 80% relative to total oxides.Type: GrantFiled: December 22, 2011Date of Patent: July 12, 2016Assignee: Pacific Industrial Development CorporationInventors: Wei Wu, Yunkui Li, Jeffery Lachapelle
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Publication number: 20150266007Abstract: The present disclosure generally provides novel STT-type zeolite materials called PIDC-120501, PIDC-120502, and PIDC-120805/120806 or PIDC-type zeolites and a method of making these zeolites. The present disclosure also provides for the use of these zeolite materials as a catalyst and a method of preparing said catalyst. The PIDC-type zeolites or STT-type zeolite materials may be used as a catalyst, such as in Selective Catalytic Reduction (SCR) applications.Type: ApplicationFiled: March 26, 2015Publication date: September 24, 2015Applicant: Pacific Industrial Development CorporationInventors: Manjola Mancka, Yunkui Li, Jeffery LaChapelle, Wei Wu, David Shepard
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Publication number: 20150196876Abstract: A method of preparing a crystalline STT-type zeolite that has a mole ratio greater than about 15:1 of a tetravalent element oxide to a trivalent element oxide is disclosed along with a gas treatment system that incorporates the STT-type zeolite and a process for treating a gas using the STT-type zeolite. The method generally comprises forming an aqueous mixture comprising a tetravalent element oxide source, a trivalent element oxide source, a source of alkali metal, and an organic structure directing agent; maintaining the mixture under conditions that crystallize crystals of a STT-type zeolite; and recovering the crystals The STT-type zeolite crystals exhibit x-ray diffraction 2-theta degree peaks at: 8.26, 8.58, 9.28, 9.54, 10.58, 14.52, 15.60, 16.43, 17.13, 17.74, 18.08, 18.46, 19.01, 19.70, 20.12, 20.38, 20.68, 21.10, 21.56, 22.20, 22.50, 22.78, 23.36, 23.76, 23.99, 24.54, 24.92, 25.16, 25.58, 25.80, 26.12, 26.94, 27.38, 27.92, 28.30, 28.60, 29.24, 29.48, 30.08, 30.64, 31.20, 31.46, 31.80, 32.02, 32.Type: ApplicationFiled: March 26, 2015Publication date: July 16, 2015Inventors: Manjola Mancka, Yunkui Li, Jeffery LaChapelle, Wei Wu
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Patent number: 8629077Abstract: A rare earth alumina particulate composition manufacturing method and application are disclosed. The rare earth alumina of the invention is a particulate of porous structure with a molecular formula (REx,Al1-x)2O3, phase ? or ?+? characterized by a particle size distribution ranging from 1 to 80 ?m with a D50 of 5 to 15 ?m, a pore size distribution ranging from 0.4-200 nm with an average pore diameter of 8 to 30 nm, a pore volume (PV) raging from 0.5 to 1.2 cc/g and a fresh specific surface area (SA) ranging from 130 to 250 m2/g after calcination at 500-900° C. for 5 to 10 hours. The rare earth alumina retains a SA of greater than 60 m2/g after calcination at 1200° C. for 4 hours and greater than 40 m2/g after calcination at 1200° C. for 50 hours. There is no presence of the ? phase or other impurity phases in the long-term aged samples. The rare earth alumina of the invention has a high thermal stability and is a fine three-way catalyst support material.Type: GrantFiled: August 29, 2007Date of Patent: January 14, 2014Inventor: Yunkui Li
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Publication number: 20130274096Abstract: A new type of catalyst support with oxygen storage capacity (OSC) and methods of making the same are disclosed. The composition ratio is x(Ce1-wZrw02):yM:zL:(1-x-y-z)AI203, where Ce1-wZrw02 is the oxygen storage composition with stabilizer Zr02, molar ratio (w) in the range of 0 to about 0.8, and a weight ratio (x) of about 0.05 to about 0.8; M is an interactive promoter for oxygen storage capacity with a weight ratio (y) of 0 to about 0.10; and L is a stabilizer for the support Al203 with weight ratio (z) of from 0 to about 0.10. In some cases, M or L can act as both OSC promoter and thermal stabilizer. The weight percentage range of ceria-zirconia and other metal and rare earth oxides (x+y+z) is from about 5 to about 80% relative to total oxides.Type: ApplicationFiled: December 22, 2011Publication date: October 17, 2013Applicant: PACIFIC INDUSTRIAL DEVELOPMENT CORPORATIONInventors: Wei Wu, Yunkui Li, Jeffery Lachapelle
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Publication number: 20100285956Abstract: A rare earth alumina particulate composition manufacturing method and application are disclosed. The rare earth alumina of the invention is a particulate of porous structure with a molecular formula (RExAl1-x)2O3, phase ? or ?+? characterized by a particle size distribution ranging from 1 to 80 ?m with a D50 of 5 to 15 ?m, a pore size distribution ranging from 0.4-200 nm with an average pore diameter of 8 to 30 nm, a pore volume (PV) raging from 0.5 to 1.2 cc/g and a fresh specific surface area (SA) ranging from 130 to 250 m2/g after calcination at 500-900° C. for 5 to 10 hours. The rare earth alumina retains a SA of greater than 60 m2/g after calcination at 1200° C. for 4 hours and greater than 40 m2/g after calcination at 1200° C. for 50 hours. There is no presence of the ? phase or other impurity phases in the long-term aged samples. The rare earth alumina of the invention has a high thermal stability and is a fine three-way catalyst support material.Type: ApplicationFiled: August 29, 2007Publication date: November 11, 2010Inventor: Yunkui Li