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公开(公告)号：US20200222883A1
公开(公告)日：2020-07-16
申请号：US16830276
申请日：2020-03-26
发明人： Shinnosuke GOTO , Takeru YOSHIDA , Takumi TOJO , Hiromasa SUZUKI
摘要： The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia complex oxide and alumina, each partition wall includes a first carrier layer defining a surface layer of the partition wall and carrying Pd, and a second carrier layer located more inwardly of the partition wall than the first carrier layer and carrying Rh.
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公开(公告)号：US20190144342A1
公开(公告)日：2019-05-16
申请号：US16245257
申请日：2019-01-11
发明人： Shinnosuke GOTO , Kenta NOMURA , Takumi TOJO , Takeru YOSHIDA , Hiromasa SUZUKI
IPC分类号： C04B38/00 , C04B35/488 , C04B35/10 , F01N3/28
摘要： The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, and when the pore size of the partition wall of the honeycomb fired body is measured by mercury porosimetry, and the measurement results are shown as a pore size distribution curve with pore size (μm) on the horizontal axis and log differential pore volume (ml) on the vertical axis, at least one peak is present in each of the pore size ranges of 0.01 to 0.1 μm and 0.1 to 5 μm.
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公开(公告)号：US20200222884A1
公开(公告)日：2020-07-16
申请号：US16830278
申请日：2020-03-26
发明人： Shinnosuke GOTO , Takumi TOJO , Takeru YOSHIDA , Hiromasa SUZUKI
IPC分类号： B01J23/63 , B01J35/04 , B01J37/00 , B01J37/02 , B01J37/08 , B01D53/94 , B01J23/00 , F01N3/28
摘要： The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a noble metal supported on the honeycomb structured body; and an inlet-side end face and on outlet-side end face, wherein each partition wall includes a substrate portion in the form of an extrudate containing a ceria-zirconia complex oxide and alumina, and a coat layer formed on a surface of the substrate portion and containing the noble metal, and the inlet-side end face has a higher aperture ratio than the outlet-side end face.
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公开(公告)号：US20200222882A1
公开(公告)日：2020-07-16
申请号：US16830272
申请日：2020-03-26
发明人： Shinnosuke GOTO , Takumi TOJO , Takeru YOSHIDA , Hiromasa SUZUKI
摘要： The present invention provides a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia composite oxide and alumina, and cerium on a surface of each partition wall has a lower concentration than cerium in a central portion of the partition wall in a thickness direction.
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公开(公告)号：US20190143312A1
公开(公告)日：2019-05-16
申请号：US16245255
申请日：2019-01-11
发明人： Shinnosuke GOTO , Takumi TOJO , Takeru YOSHIDA , Hiromasa SUZUKI
摘要： The present invention relates to a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, wherein the honeycomb fired body is an extrudate containing ceria-zirconia composite oxide particles and alumina particles, the ceria-zirconia composite oxide particles have an average particle size of 1 to 50 μm, and the ceria-zirconia composite oxide particles include a cracked particle.
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公开(公告)号：US20200222889A1
公开(公告)日：2020-07-16
申请号：US16830275
申请日：2020-03-26
发明人： Shinnosuke GOTO , Takeru YOSHIDA , Takumi TOJO , Hiromasa SUZUKI
摘要： The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body including in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein the honeycomb structured body contains a ceria-zirconia complex oxide and alumina, each partition wall includes a first carrier layer defining a surface layer of the partition wall and carrying Rh, and a second carrier layer located more inwardly of the partition wall than the first carrier layer and carrying Pd, and the Pd concentration on the first carrier layer side of each second carrier layer is higher than the Pd concentration in the center of the second carrier layer.
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公开(公告)号：US20200078984A1
公开(公告)日：2020-03-12
申请号：US16566891
申请日：2019-09-11
摘要： The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength. The present invention relates to a method of producing a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method including: a raw material mixing step of preparing a raw material paste containing ceria-zirconia composite oxide particles, alumina particles, an inorganic binder, and inorganic fibers; a molding step of molding the raw material paste into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a drying step of drying the honeycomb molded body obtained in the molding step; and a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body, wherein the raw material mixing step includes pre-mixing of the inorganic binder and the inorganic fibers.
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公开(公告)号：US20200222890A1
公开(公告)日：2020-07-16
申请号：US16830277
申请日：2020-03-26
发明人： Shinnosuke GOTO , Takumi TOJO , Takeru YOSHIDA , Hiromasa SUZUKI
摘要： The present invention relates to a honeycomb catalytic converter including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and a noble metal supported on the honeycomb structured body, wherein each partition wall includes a substrate portion in the form of an extrudate containing a ceria-zirconia complex oxide and alumina, and a coat layer formed on a surface of the substrate portion and containing the noble metal, and the partition walls have a thermal expansion coefficient of 7.0×10−6/° C. to 8.0×10−6/° C. in a longitudinal direction.
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公开(公告)号：US20200222881A1
公开(公告)日：2020-07-16
申请号：US16830279
申请日：2020-03-26
发明人： Shinnosuke GOTO , Takumi TOJO , Takeru YOSHIDA , Hiromasa SUZUKI
摘要： The present invention relates to a honeycomb catalytic converter, including: a honeycomb structured body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; and Pd and Rh supported on the partition walls of the honeycomb structured body, wherein the honeycomb structured body is an extrudate containing a ceria-zirconia complex oxide and alumina, a Pd-carrying region where only Pd is supported is formed on the partition walls within a predetermined width from one end of the honeycomb structured body, and a Rh-carrying region where only Rh is supported is formed on the partition walls within a predetermined width from the other end of the honeycomb structured body, and the Pd-carrying region extends to at least 50% of the length of the honeycomb structured body, and the Rh-carrying region extends to at least 20% of the length of the honeycomb structured body.
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公开(公告)号：US20200078983A1
公开(公告)日：2020-03-12
申请号：US16566890
申请日：2019-09-11
摘要： The present invention provides a method of producing a honeycomb structured body having excellent mechanical strength. The present invention relates to a method of producing a honeycomb structured body including a honeycomb fired body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween, the method including: a raw material mixing step of preparing a raw material paste containing ceria-zirconia composite oxide particles, alumina particles, an inorganic binder, and alumina fibers; a molding step of molding the raw material paste into a honeycomb molded body in which multiple through-holes are arranged longitudinally in parallel with one another with a partition wall therebetween; a drying step of drying the honeycomb molded body obtained in the molding step; and a firing step of firing the honeycomb molded body dried in the drying step into a honeycomb fired body, wherein the percentage of amorphous alumina fibers in the alumina fibers for use in the raw material mixing step is 50 to 100 wt %.
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