Patents by Inventor Kaidong Chen
Kaidong 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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Patent number: 11963455Abstract: There is provided a method for etching magnetic tunnel junction, using an etching apparatus including a sample loading chamber, a vacuum transition chamber, a reactive ion plasma etching chamber, an ion beam etching chamber, a coating chamber, and a vacuum transmission chamber. The method completes the etching of the magnetic tunnel junction in the reactive ion plasma etching chamber, performs ion beam cleaning in the ion beam etching chamber, and performs coating protection in the coating chamber. The transmission among the respective chambers is all in a vacuum state. The invention can overcome the bottleneck in the production of high-density small devices, while greatly improving the yield, reliability and production efficiency of the devices.Type: GrantFiled: May 21, 2019Date of Patent: April 16, 2024Assignee: JIANGSU LEUVEN INSTRUMENTS CO. LTDInventors: Kaidong Xu, Dongchen Che, Dongdong Hu, Lu Chen
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Publication number: 20230312862Abstract: Provided is a continuous process for converting waste plastic into recycle for polyethylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene and preparing a stable blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery FCC unit. A liquid petroleum gas LPG olefin/paraffin mixture and naphtha are recovered from the FCC unit and passed to a steam cracker to make ethylene.Type: ApplicationFiled: March 30, 2023Publication date: October 5, 2023Applicant: Chevron U.S.A. Inc.Inventors: Tengfei LIU, Joel E. SCHMIDT, Hye-Kyung C. TIMKEN, Richard L. GROVE, Kaidong CHEN
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Publication number: 20230312437Abstract: Provided is a continuous process for converting waste plastic into recycle for polypropylene polymerization. The process comprises selecting waste plastics containing polyethylene and/or polypropylene and preparing a stable blend of petroleum and the selected plastic. The amount of plastic in the blend comprises no more than 20 wt. % of the blend. The blend is passed to a refinery FCC unit. A liquid petroleum gas C3 olefin/paraffin mixture is recovered from the FCC unit. The C3 paraffins and C3 olefins are separated into different fractions with the C3 olefin fraction passed to a propylene polymerization reactor, and the C3 paraffin fraction passed optionally to a dehydrogenation unit to produce additional propylene.Type: ApplicationFiled: March 30, 2023Publication date: October 5, 2023Applicant: Chevron U.S.A. Inc.Inventors: Joel E. SCHMIDT, Hye-Kyung C. TIMKEN, Tengfei LIU, Richard L. GROVE, Kaidong CHEN
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Patent number: 9169449Abstract: A method to upgrade heavy oil feedstock using an ebullated bed reactor and a novel catalyst system is provided. The ebullated bed reactor system includes two different catalyst with different characteristics: an expanded catalyst zone containing particulate catalyst having a particle size of greater than 0.65 mm; and a slurry catalyst having an average particle size ranging from 1 to 300 ?m. The slurry catalyst is introduced to the ebullated bed system with the heavy oil feedstock, and entrained in the upflowing hydrocarbon liquid passing through the ebullated bed reaction zone. The slurry catalyst reduces the formation of sediment and coke precursors in the ebullating bed reactor system. The slurry catalyst is prepared from at least a water-soluble metal precursor and pre-sulfided prior to being introduced with the heavy oil feedstock to the reactor system, or sulfided in-situ in the ebullated bed reactor in another embodiment.Type: GrantFiled: December 20, 2011Date of Patent: October 27, 2015Assignee: Chevron U.S.A. Inc.Inventors: Bruce E. Reynolds, Julie Chabot, Erin Maris, Sean Solberg, Kaidong Chen
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Publication number: 20120152806Abstract: A method to upgrade heavy oil feedstock using an ebullated bed reactor and a novel catalyst system is provided. The ebullated bed reactor system includes two different catalyst with different characteristics: an expanded catalyst zone containing particulate catalyst having a particle size of greater than 0.65 mm; and a slurry catalyst having an average particle size ranging from 1 to 300 ?m. The slurry catalyst is introduced to the ebullated bed system with the heavy oil feedstock, and entrained in the upflowing hydrocarbon liquid passing through the ebullated bed reaction zone. The slurry catalyst reduces the formation of sediment and coke precursors in the ebullating bed reactor system. The slurry catalyst is prepared from at least a water-soluble metal precursor and pre-sulfided prior to being introduced with the heavy oil feedstock to the reactor system, or sulfided in-situ in the ebullated bed reactor in another embodiment.Type: ApplicationFiled: December 20, 2011Publication date: June 21, 2012Inventors: Bruce E. Reynolds, Julie Chabot, Erin Maris, Sean Solberg, Kaidong Chen
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Patent number: 7972499Abstract: The instant invention is directed to a process employing slurry catalyst compositions in the upgrading of heavy oils. The slurry catalyst composition is not permitted to settle, which would result in possible deactivation. The slurry is recycled to an upgrading reactor for repeated use and products require no further separation procedures for catalyst removal.Type: GrantFiled: September 18, 2008Date of Patent: July 5, 2011Assignee: Chevron U.S.A. Inc.Inventors: Kaidong Chen, Julie Chabot
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Patent number: 7947623Abstract: A hydroprocessing bulk catalyst is provided. A process to prepare hydroprocessing bulk catalysts is also provided. The hydroprocessing catalyst has the formula (Mt)a(Lu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h,, wherein M is at least one group VIB metal; promoter metal L is optional and if present, L is at least one Group VIII non-noble metal; t, u, v, w, x, y, z representing the total charge for each of the components (M, L, S, C, H, O and N, respectively); ta+ub+vd+we+xf+yg+zh=0; 0=<b; and 0=<b/a=<5, (a+0.5b)<=d<=(5a+2b), 0<=e<=11(a+b), 0<=f<=7(a+b), 0<=g<=5(a+b), 0<=h<=0.5(a+b). The catalyst has an X-ray powder diffraction pattern with at least one broad diffraction peak at any of Bragg angles: 8 to 18°, 32 to 40°, and 55 to 65° (from 0 to 70° 2-? scale).Type: GrantFiled: May 26, 2010Date of Patent: May 24, 2011Inventors: Oleg Mironov, Alexander E. Kuperman, Jaime Lopez, Axel Brait, Bruce Reynolds, Kaidong Chen
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Patent number: 7931796Abstract: Systems and methods for hydroprocessing a heavy oil feedstock, the system employs a plurality of contacting zones and separation zones with at least some of the fresh slurry catalyst being supplied to at least a contacting zone other than the first contacting zone. The contacting zones operate under hydrocracking conditions, employing the slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and optionally, further treated in an in-line hydrotreater. A least a portion of the non-volatile fractions recovered from the separation zones is recycled back to the first contacting zone in the system.Type: GrantFiled: September 18, 2008Date of Patent: April 26, 2011Assignee: Chevron U.S.A. Inc.Inventors: Julie Chabot, Kaidong Chen, Bruce Reynolds
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Publication number: 20100234212Abstract: A hydroprocessing bulk catalyst is provided. A process to prepare hydroprocessing bulk catalysts is also provided. The hydroprocessing catalyst has the formula (Mt)a(Lu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h,, wherein M is at least one group VIII metal; promoter metal L is optional and if present, L is at least one Group VIII non-noble metal; t, u, v, w, x, y, z representing the total charge for each of the components (M, L, S, C, H, O and N, respectively); ta+ub+vd+we+xf+yg+zh=0; 0=<b; and 0=<b/a=<5, (a+0.5b)<=d<=(5a+2b), 0<=e<=11(a+b), 0<=f<=7(a+b), 0<=g<=5(a+b), 0<=h<=0.5(a+b). The catalyst has an X-ray powder diffraction pattern with at least one broad diffraction peak at any of Bragg angles: 8 to 18°, 32 to 40°, and 55 to 65° (from 0 to 70° 2-? scale).Type: ApplicationFiled: May 26, 2010Publication date: September 16, 2010Inventors: Axel Brait, Alexander E. Kuperman, Jaime Lopez, Oleg Mironov, Bruce Reynolds, Kaidong Chen
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Patent number: 7737072Abstract: A hydroprocessing catalyst is provided. The hydroprocessing catalyst has the formula (Mt)a(Xu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h, wherein M is at least one group VIB metal; X is at least one Group VIII non-noble metal; t, u, v, w, x, y, z representing the total charge for each of the components (M, X, S, C, H, O and N, respectively); ta+ub+vd+we+xf+yg+zh=0; and 0=<b/a=<5, (a+0.5b)<=d<=(5a+2b), 0<=e<=11(a+b), 0<=f<=7(a+b), 0<=g<=5(a+b), 0<=h<=0.5(a+b). The catalyst has an X-ray powder diffraction pattern with at least one broad diffraction peak at any of Bragg angles: 8 to 18°, 32 to 40°, and 55 to 65° (from 0 to 70° 2-? scale). In one embodiment, the at least one diffraction peak is greater than 2 degrees wide at ½ height.Type: GrantFiled: October 31, 2007Date of Patent: June 15, 2010Assignee: Chevron USA Inc.Inventors: Oleg Mironov, Alexander E. Kuperman, Jaime Lopez, Axel Brait, Bruce Reynolds, Kaidong Chen
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Patent number: 7737073Abstract: A hydroprocessing bulk catalyst is provided. A process to prepare hydroprocessing bulk catalysts is also provided. The hydroprocessing catalyst has the formula (Mt)a(Lu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h, wherein M is at least one group VIB metal; promoter metal L is optional and if present, L is at least one Group VIII non-noble metal; t, u, v, w, x, y, z representing the total charge for each of the components (M, L, S, C, H, O and N, respectively); ta+ub+vd+we+xf+yg+zh=0; 0=<b; and 0=<b/a=<5, (a+0.5b)<=d<=(5a+2b), 0<=e<=11(a+b), 0<=f<=7(a+b), 0<=g<=5(a+b), 0<=h<=0.5(a+b). The catalyst has an X-ray powder diffraction pattern with at least one broad diffraction peak at any of Bragg angles: 8 to 18°, 32 to 40°, and 55 to 65° (from 0 to 70° 2-? scale).Type: GrantFiled: October 29, 2008Date of Patent: June 15, 2010Assignee: Chevron U.S.A. Inc.Inventors: Oleg Mironov, Alexander E. Kuperman, Jaime Lopez, Axel Brait, Bruce Reynolds, Kaidong Chen
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Publication number: 20100065471Abstract: Systems and methods for hydroprocessing a heavy oil feedstock, the system employs a plurality of contacting zones and separation zones with at least some of the fresh slurry catalyst being supplied to at least a contacting zone other than the first contacting zone. The contacting zones operate under hydrocracking conditions, employing the slurry catalyst for upgrading the heavy oil feedstock, forming upgraded products of lower boiling boiling hydrocarbons. In the separation zones, upgraded products are removed overhead and optionally, further treated in an in-line hydrotreater. A least a portion of the non-volatile fractions recovered from the separation zones is recycled back to the first contacting zone in the system.Type: ApplicationFiled: September 18, 2008Publication date: March 18, 2010Inventors: Julie Chabot, Kaidong Chen, Bruce Reynolds
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Patent number: 7678732Abstract: The instant invention is directed to the preparation of a slurry catalyst composition. The slurry catalyst composition is prepared in a series of steps, involving mixing a Group VIB metal oxide and aqueous ammonia to form an aqueous mixture and sulfiding the mixture to form a slurry. The slurry is then promoted with a Group VIII metal. Subsequent steps involve mixing the slurry with a hydrocarbon oil, and combining the resulting mixture with hydrogen gas (under conditions which maintain the water in a liquid phase) to produce the active slurry catalyst.Type: GrantFiled: September 17, 2008Date of Patent: March 16, 2010Assignee: Chevron USA Inc.Inventors: Kaidong Chen, Bruce E. Reynolds, Darush Farshid
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Publication number: 20090200204Abstract: A hydroprocessing catalyst is provided. The hydroprocessing catalyst has the formula (Mt)a(Xu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h, wherein M is at least one group VIB metal; X is at least one Group VIII non-noble metal; t, u, v, w, x, y, z representing the total charge for each of the components (M, X, S, C, H, O and N, respectively); ta+ub+vd+we+xf+yg+zh=0; and 0=<b/a=<5, (a+0.5b)<=d<=(5a+2b), 0<=e<=11(a+b), 0<=f<=7(a+b), 0<=g<=5(a+b), 0<=h<=0.5(a+b). The catalyst has an X-ray powder diffraction pattern with at least one broad diffraction peak at any of Bragg angles: 8 to 18°, 32 to 40°, and 55 to 65° (from 0 to 70° 2-? scale). In one embodiment, the at least one diffraction peak is greater than 2 degrees wide at ½ height.Type: ApplicationFiled: October 31, 2007Publication date: August 13, 2009Inventors: Oleg Mironov, Alexander E. Kuperman, Jaime Lopez, Axel Brait, Bruce Reynolds, Kaidong Chen
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Publication number: 20090159495Abstract: A method of converting heavy oil into one or more valuable products comprises hydroconverting heavy oil, recovering an effluent stream from the hydroconverting, and deep catalytic cracking the effluent stream. The hydroconverting comprises reacting a slurry comprising unsupported fine catalyst in heavy oil. The effluent stream comprises unsupported fine catalyst in unconverted heavy oil. The deep catalytic cracking converts unconverted heavy oil into one or more light oil products.Type: ApplicationFiled: December 20, 2007Publication date: June 25, 2009Applicant: Chevron U.S.A. Inc.Inventor: Kaidong Chen
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Publication number: 20090057201Abstract: A hydroprocessing bulk catalyst is provided. A process to prepare hydroprocessing bulk catalysts is also provided. The hydroprocessing catalyst has the formula (Mt)d(Lu)b(Sv)d(Cw)e(Hx)f(Oy)g(Nz)h, wherein M is at least one group VIB metal; promoter metal L is optional and if present, L is at least one Group VIII non-noble metal; t, u, v, w, x, y, z representing the total charge for each of the components (M, L, S, C, H, O and N, respectively); ta+ub+vd+we+xf+yg+zh=0; 0 =<b; and 0=<b/a=<5, (a+0.5b)<=d<=(5a+2b), 0<=e<=11(a+b), 0<=f<=7(a+b), 0<=g<=5(a+b), 0<=h<=0.5(a+b). The catalyst has an X-ray powder diffraction pattern with at least one broad diffraction peak at any of Bragg angles: 8 to 18°, 32 to 40°, and 55 to 65° (from 0 to 70° 2-? scale).Type: ApplicationFiled: October 29, 2008Publication date: March 5, 2009Inventors: Axel Brait, Alexander E. Kuperman, Jaime Lopez, Oleg Mironov, Bruce Reynolds, Kaidong Chen
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Publication number: 20090050526Abstract: The instant invention is directed to a process employing slurry catalyst compositions in the upgrading of heavy oils. The slurry catalyst composition is not permitted to settle, which would result in possible deactivation. The slurry is recycled to an upgrading reactor for repeated use and products require no further separation procedures for catalyst removal.Type: ApplicationFiled: September 18, 2008Publication date: February 26, 2009Inventors: Kaidong Chen, Julie Chabot
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Publication number: 20090011931Abstract: The instant invention is directed to the preparation of a slurry catalyst composition. The slurry catalyst composition is prepared in a series of steps, involving mixing a Group VIB metal oxide and aqueous ammonia to form an aqueous mixture and sulfiding the mixture to form a slurry. The slurry is then promoted with a Group VIII metal. Subsequent steps involve mixing the slurry with a hydrocarbon oil, and combining the resulting mixture with hydrogen gas (under conditions which maintain the water in a liquid phase) to produce the active slurry catalyst.Type: ApplicationFiled: September 17, 2008Publication date: January 8, 2009Inventors: Kaidong Chen, Bruce Reynolds, Darush Farshid
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Publication number: 20080305947Abstract: The instant invention is directed to the preparation of a slurry catalyst composition. The slurry catalyst composition is prepared in a series of steps, involving mixing a Group VIB metal oxide and aqueous ammonia to form an aqueous mixture and sulfiding the mixture to form a slurry. The slurry is then promoted with a Group VIII metal. Subsequent steps involve mixing the slurry with a hydrocarbon oil, and combining the resulting mixture with hydrogen gas (under conditions which maintain the water in a liquid phase) to produce the active slurry catalyst.Type: ApplicationFiled: July 7, 2008Publication date: December 11, 2008Inventors: Kaidong Chen, Bruce E. Reynolds
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Patent number: 7431824Abstract: The instant invention is directed to a process employing slurry catalyst compositions in the upgrading of heavy oils. The slurry catalyst composition is not permitted to settle, which would result in possible deactivation. The slurry is recycled to an upgrading reactor for repeated use and products require no further separation procedures for catalyst removal.Type: GrantFiled: September 10, 2004Date of Patent: October 7, 2008Assignee: Chevron U.S.A. Inc.Inventors: Kaidong Chen, Julie Chabot