Ferrite Patents (Class 585/625)
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Patent number: 11154816Abstract: Passive NOx adsorption (PNA) compositions have a formula Pd—NiFe2O4 wherein Pd represents a palladium component, such as palladium oxide, that is adsorbed on surfaces of the nickel ferrite. Such compositions can be synthesized by wet impregnation of nickel ferrite with a palladium salt, and exhibit efficient NOx adsorption at low temperature, with NOx desorption occurring predominantly at high temperature. Two-stage NOx abatement catalysts, effective under engine cold start conditions, include a PNA composition upstream from an NOx conversion catalyst.Type: GrantFiled: May 30, 2019Date of Patent: October 26, 2021Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.Inventors: Torin C. Peck, Krishna Gunugunuri, Charles Alexander Roberts
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Patent number: 11117119Abstract: The present invention relates to a catalyst for oxidative dehydrogenation and a method of preparing the same. More particularly, the present invention provides a catalyst for oxidative dehydrogenation having a porous structure which may easily control heat generation due to high-temperature and high-pressure reaction conditions and side reaction due to the porous structure and thus exhibits superior product selectivity, and a method of preparing the catalyst.Type: GrantFiled: November 30, 2016Date of Patent: September 14, 2021Assignee: LG CHEM, LTD.Inventors: Myung Ji Suh, Yoon Jae Min, Dong Hyun Ko, Kyong Yong Cha, Se Won Baek, Jun Kyu Han
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Patent number: 11078135Abstract: One aspect of the present disclosure provides a system for producing 1,3-butadiene, which includes: a first supply unit, by which a first feed including a butene raw material, oxygen and steam is supplied; a second supply unit, by which a second feed including a butene raw material and oxygen is supplied; and a reaction unit, which includes a catalyst fixed bed and in which an oxidative dehydrogenation reaction takes place, wherein the first supply unit is connected to a front end of the reaction unit, and the second supply unit is connected to an intermediate end of the reaction unit.Type: GrantFiled: December 9, 2019Date of Patent: August 3, 2021Assignee: Korea Kumho Petrochemical Co., Ltd.Inventors: Kyoung Ho Row, Yong Hee Yun, Jin Woo Park, Jae Woo Kim
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Patent number: 10888844Abstract: Provided is a catalyst for oxidative dehydrogenation, a method of preparing the catalyst, and a method of performing oxidative dehydrogenation using the catalyst. The catalyst for oxidative dehydrogenation has improved durability and fillability by including a porous support coated with a metal oxide (AB2O4) according to Equation 1 of the present invention, wherein the metal oxide exhibits activity during oxidative dehydrogenation. Therefore, when the catalyst is used in oxidative dehydrogenation of butene, the conversion rate of butene and the selectivity and yield of butadiene may be greatly improved.Type: GrantFiled: April 12, 2018Date of Patent: January 12, 2021Assignee: LG CHEM, LTD.Inventors: Myung Ji Suh, Dong Hyun Ko, Kyong Yong Cha, Dae Heung Choi, Ye Seul Hwang, Jun Kyu Han, Sun Hwan Hwang
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Patent number: 10532963Abstract: Methods for producing butadiene by the oxidative dehydrogenation of butene are provided. Methods for producing butadiene from a feed stream including oxygen and butene in a molar ratio of oxygen to butene (O2/C4H8) from about 0.9 to about 1.5 can include introducing the feed stream to a catalyst in the presence of steam. The molar ratio of steam to butene (H2O/C4H8) can be from about 10 to about 20. Methods can further include reacting the butene to generate a product stream therefrom comprising butadiene and water. Methods can further include separating water from the product stream to generate a butadiene stream including greater than about 85 wt-% butadiene.Type: GrantFiled: January 5, 2017Date of Patent: January 14, 2020Assignee: SABIC GLOBAL TECHNOLOGIES B.V.Inventors: Xin Li, Jorge Jimenez, Paulette Hazin, Reggie Tennyson, Xiankuan Zhang
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Patent number: 9546118Abstract: The present disclosure provides a catalyst for oxidative dehydrogenation of butene to butadiene, comprising at least one compound of formula ZnaAlbMcFeeOf.Z(?-Fe2O3), wherein M is at least one element chosen from Be, Mg, Ca, Sr, Mn, Ba, Cu, Co, and Ni, Z represents the percentage by weight of ?-Fe2O3 in the catalyst and ranges from 10% to 70%. Also provided herein is a process of preparing said catalyst and the use of said catalyst in an oxidative dehydrogenation of butene to butadiene processes.Type: GrantFiled: September 4, 2013Date of Patent: January 17, 2017Assignees: China Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Technology SinopecInventors: Changxi Miao, Wenhai Wu, Zhigui Fan, Tieqiang Zeng, Chunjing Ma, Sheng Wu
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Patent number: 8674156Abstract: A method of producing a mixed manganese ferrite catalyst, and a method of preparing 1,3-butadiene using the mixed manganese ferrite catalyst. Specifically, a method of producing a mixed manganese ferrite catalyst through a coprecipitation method which is performed at a temperature of 10˜40° C., and a method of preparing 1,3-butadiene using the mixed manganese ferrite catalyst through an oxidative dehydrogenation reaction, in which a C4 mixture containing n-butene, n-butane and other impurities is directly used as reactants without performing additional n-butane separation process or n-butene extraction. 1,3-butadiene can be prepared directly using a C4 mixture including n-butane at a high concentration as a reactant through an oxidative hydrogenation reaction without performing an additional n-butane separation process, and 1,3-butadiene, having high activity, can be also obtained in high yield for a long period of time.Type: GrantFiled: November 7, 2008Date of Patent: March 18, 2014Assignees: SK Innovation Co., Ltd., SK Global Chemical Co. Ltd.Inventors: Young Min Chung, Yong Tak Kwon, Tae Jin Kim, Seong Jun Lee, Min Su Ko, Seung Hoon Oh, Yong Seung Kim, In Kyu Song
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Publication number: 20140066680Abstract: The present disclosure provides a catalyst for oxidative dehydrogenation of butene to butadiene, comprising at least one compound of formula ZnaAlbMcFeeOf.Z(?-Fe2O3), wherein M is at least one element chosen from Be, Mg, Ca, Sr, Mn, Ba, Cu, Co, and Ni, Z represents the percentage by weight of ?-Fe2O3 in the catalyst and ranges from 10% to 70%. Also provided herein is a process of preparing said catalyst and the use of said catalyst in an oxidative dehydrogenation of butene to butadiene processes.Type: ApplicationFiled: September 4, 2013Publication date: March 6, 2014Applicants: Shanghai Research Institute of Petrochemical Technology SINOPEC, China Petroleum & Chemical CorporationInventors: Changxi Miao, Wenhai Wu, Zhigui Fan, Tieqiang Zeng, Chunjing Ma, Sheng Wu
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Patent number: 8513479Abstract: The present invention relates to a zinc ferrite catalyst, a method of producing the same, and a method of preparing 1,3-butadiene using the same. Specifically, the present invention relates to a zinc ferrite catalyst which is produced in a pH-adjusted solution using a coprecipitation method, a method of producing the same, and a method of preparing 1,3-butadiene using the same, in which the 1,3-butadiene can be prepared directly using a C4 mixture including n-butene and n-butane through an oxidative dehydrogenation reaction. The present invention is advantageous in that 1,3-butadiene can be obtained at a high yield directly using a C4 fraction without performing an additional process for separating n-butene, as a reactant, from a C4 fraction containing impurities.Type: GrantFiled: May 8, 2008Date of Patent: August 20, 2013Assignees: SK Global Chemical Co., Ltd, SK Innovation Co., Ltd.Inventors: Young Min Chung, Seong Jun Lee, Tae Jin Kim, Seung Hoon Oh, Yong Seung Kim, In Kyu Song, Hee Soo Kim, Ji Chul Jung, Ho Won Lee
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Publication number: 20130158325Abstract: This invention relates to a method of preparing a mixed manganese ferrite coated catalyst, and a method of preparing 1,3-butadiene using the same, and more particularly, to a method of preparing a catalyst by coating a support with mixed manganese ferrite obtained by co-precipitation at 10˜40° C. using a binder and to a method of preparing 1,3-butadiene using oxidative dehydrogenation of a crude C4 mixture containing n-butene and n-butane in the presence of the prepared catalyst. This mixed manganese ferrite coated catalyst has a simple synthetic process, and facilitates control of the generation of heat upon oxidative dehydrogenation and is very highly active in the dehydrogenation of n-butene.Type: ApplicationFiled: May 26, 2011Publication date: June 20, 2013Applicant: SK INNOVATION CO., LTD.Inventors: Yong Tak Kwon, Tae Jin Kim, Young Min Chung, Ok Youn Kim, Seung Hoon Oh
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Publication number: 20120059208Abstract: A catalyst for oxidative dehydrogenation of organic compounds is provided by forming a solution of catalyst precursor components comprised of Fe+3 and Zn+2 cations and at least one other modifier element cation in water to form an aqueous solution of the catalyst precursor components. The modifier element cation has a standard reduction potential of from greater than about ?2.87 E° (V) to less than about ?0.036 E° (V) with a valence of +2. A base is separately and simultaneously added to the aqueous solution in amounts to maintain the pH of the aqueous solution at a pH of from about 8.5 to about 9.5 as the catalyst precursor components. The catalyst precursor components are allowed to react and precipitate out of solution as a precipitate. The resulting precipitate is calcined to form a modified zinc ferrite catalyst compound.Type: ApplicationFiled: September 2, 2010Publication date: March 8, 2012Inventors: Aghaddin Mamedov, Shahid Shaikh, Clark Rea, Xiankuan Zhang
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Patent number: 6566573Abstract: A process and catalyst for the partial oxidation of paraffinic hydrocarbons, such as ethane, propane, naphtha, and natural gas condensates, to olefins, such as ethylene and propylene. The process involves contacting a paraffinic hydrocarbon with oxygen in the presence of hydrogen and a catalyst under autothermal process conditions. Preheating the feed decreases oxygen consumption and increases the net hydrogen balance. The catalyst comprises a Group 8B metal, preferably, a platinum group metal, and at least one promoter selected from Groups 1B, 6B, 3A, 4A, and 5A, optionally supported on a catalytic support, such as magnesia or alumina. In preferred embodiments, the support is pretreated with a support modifier selected from Groups 1A, 2A, 3B, 4B, 5B, 6B, 1B, 3A, 4A, 5A, the rare earth lanthanides, and the actinides. A modified fluidized bed reactor is disclosed for the process.Type: GrantFiled: September 1, 1999Date of Patent: May 20, 2003Assignee: Dow Global Technologies Inc.Inventors: Sameer S. Bharadwaj, Joseph J. Maj, Jonathan H. Siddall, Mark D. Bearden, Craig B. Murchison, Gerald E. Lazaruk
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Patent number: 5877377Abstract: A method for conducting a chemical reaction with a catalyst composed of metal oxide particles among which are uniformly incorporated, in order to reduce the operating temperature of the catalyst, palladium particles.Type: GrantFiled: October 20, 1995Date of Patent: March 2, 1999Assignee: Johnson Matthey Public Limited CompanyInventors: Stanislaw E. Golunski, John M. Gascoyne, Anthony Fulford, John W. Jenkins
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Patent number: 4973793Abstract: Cofeeding butylenes with amylenes in a catalytic oxidative dehydrogenation reaction substantially improves the conversion of the amylenes. The approved amylene conversion is obtained by the oxidative dehydrogenation of mixtures of amylenes and from 10 to 95 mole % butylenes.Type: GrantFiled: June 8, 1989Date of Patent: November 27, 1990Assignee: Texas Petrochemicals CorporationInventor: Cecil G. McFarland
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Patent number: 4644088Abstract: A catalyst for removing acetylenic impurities from gaseous organic product streams, comprising at least Fe and Ni, other elements from Groups 8, 1b, 2b, 4b, 6b and 7b of the Periodic Table, an alkaline earth metal and an alkali metal.Type: GrantFiled: June 15, 1981Date of Patent: February 17, 1987Assignee: Petro-Tex Chemical CorporationInventor: Cecil G. McFarland
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Patent number: 4547615Abstract: A process for producing a conjugated diolefin, which comprises oxidatively dehydrogenating a monoolefin having at least 4 carbon atoms in the vapor phase with molecular oxygen to form the corresponding conjugated diolefin, said reaction being carried out in the presence of a catalyst having the general composition formulaMo.sub.a Bi.sub.b Cr.sub.c Ni.sub.d X.sub.e Fe.sub.f Y.sub.g Z.sub.h O.sub.iwherein X represents Zr or Al, Y represents at least one element selected from the group consisting of metal elements of Group Ia of the periodic table, metal elements of Group II of the periodic table, Tl and P, Z represents at least one element selected from the group consisting of In, Ag, Ti, Nb, Ta, Co, La, Ce, Nd and Mn, a, b, c, d, e, f, g, h and i are respectively the atomic numbers of Mo, Bi, Cr, Ni, X, Fe, Y, Z and O, and when a=12, b=0.05-20, c=0.05-20, d=0.1-30, e=0.01-20, f=0.01-20, g=0.001-20, h=0-20, and i is the atomic number of oxygen satisfying the atomic valences of the other elements.Type: GrantFiled: June 8, 1984Date of Patent: October 15, 1985Assignee: Nippon Zeon Co. Ltd.Inventor: Haruhisa Yamamoto
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Patent number: 4513159Abstract: A catalyst for removing acetylenic impurities from gaseous organic product streams, comprising at least Fe and Ni, other elements from Groups 8, 1b, 2b, 4b, 6b and 7b of the Periodic Table, an alkaline earth metal and an alkali metal.Type: GrantFiled: October 12, 1979Date of Patent: April 23, 1985Assignee: Petro-Tex Chemical CorporationInventor: Cecil G. McFarland
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Patent number: 4413155Abstract: Oxide complex catalysts comprising Fe-Sb-Bi-O.sub.x promoted with a wide variety of different elements have been found to be especially useful in the ammoxidation of olefins to nitriles such as acrylonitrile and methacrylonitrile. Not only are the desired nitriles obtained with high yields when these catalysts are used, but also the production of unwanted liquid byproducts such as acrolein, acrylic acid and acetonitrile is significantly reduced.Type: GrantFiled: March 30, 1981Date of Patent: November 1, 1983Assignee: The Standard Oil Co.Inventors: Dev D. Suresh, Robert K. Grasselli, David A. Orndoff
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Patent number: 4332972Abstract: Improved oxidative dehydrogenation catalysts are prepared by modifying a preformed zinc ferrite oxidative dehydrogenation catalyst with zinc oxide. The resulting catalyst compositions exhibit higher conversions and yields.Type: GrantFiled: September 8, 1978Date of Patent: June 1, 1982Assignee: Petro-Tex Chemical CorporationInventors: Harold F. Christmann, Edward J. Miklas