公开(公告)号：US20240325956A1

公开(公告)日：2024-10-03

申请号：US18581618

申请日：2024-02-20

Applicant: NGK INSULATORS, LTD.

Inventor： Sachiko MASUDA

IPC: B01D46/24 ,  B01D53/94 ,  B01J21/04 ,  B01J35/57

CPC classification number: B01D46/2474 ,  B01D46/2429 ,  B01D46/24491 ,  B01D46/24492 ,  B01D46/2482 ,  B01D46/2484 ,  B01D46/249 ,  B01D53/94 ,  B01J21/04 ,  B01J35/57 ,  B01D2255/2092 ,  B01D2255/9155 ,  B01D2258/01 ,  B01D2279/30

Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having a porous partition wall disposed so as to surround a plurality of cells which serve as a fluid through channel extending from a first end face to a second end face; and a plugging portion provided at either an end on the first end face side or the second end face side of the cell; wherein a thickness of the partition wall is 203 to 254 μm, a porosity of the partition wall measured by the mercury press-in method is 55 to 70%, an average pore diameter of the partition wall measured by the mercury press-in method is 20 to 25 μm, and the partition wall has an average base material neck diameter of 11 to 18 μm for a base material neck part in which an actual part of a porous base material constituting the partition wall is locally narrowed.

公开(公告)号：US20240261715A1

公开(公告)日：2024-08-08

申请号：US18596025

申请日：2024-03-05

Applicant: PROTERIAL, LTD.

Inventor： Tomohisa OGATA

IPC: B01D46/24 ,  B01J35/56

CPC classification number: B01D46/247 ,  B01D46/2418 ,  B01D46/2429 ,  B01D46/24491 ,  B01D46/2474 ,  B01D46/2482 ,  B01D46/2494 ,  B01D46/2498 ,  B01J35/56 ,  B01D2279/30

Abstract: A ceramic honeycomb filter has (a) cross section areas of intake flow paths being larger than those of discharge flow paths; (b) the intake and discharge flow paths having octagonal cross section shapes with four-fold rotation symmetry each obtained by cutting off four corners from a square; (c) the intake and discharge flow paths being alternately arranged in a first direction and a second direction perpendicular to the first direction, such that their opposing sides are parallel; (d) the opening ratio of the intake flow paths being 45-60%; (e) the number of the flow paths per cm2 being 30-60; (f) the thickness t1 of a cell wall between an intake flow path and a discharge flow path adjacent to that intake flow path being 0.150-0.260 mm; and (g) the thickness t2 of a cell wall between adjacent intake flow paths meeting 1.175

公开(公告)号：US11976012B2

公开(公告)日：2024-05-07

申请号：US17294121

申请日：2019-11-06

Applicant: CORNING INCORPORATED

Inventor： Huthavahana Sarma Kuchibhotla ,  Cameron Wayne Tanner

IPC: B01D46/00 ,  B01D46/24 ,  C04B35/195 ,  C04B38/00 ,  F01N3/28

CPC classification number: C04B38/0006 ,  B01D46/2429 ,  B01D46/24491 ,  B01D46/24492 ,  B01D46/24494 ,  B01D46/2484 ,  B01D46/249 ,  B01D46/2498 ,  C04B35/195 ,  C04B38/0054 ,  B01D2279/30 ,  C04B2235/3481 ,  C04B2235/447 ,  C04B2235/9607 ,  F01N3/2825 ,  F01N2330/06

Abstract: A cordierite-containing ceramic body with % P≥50%, df≤0.50, and a combined weight percentage of crystalline phases containing cordierite and indialite of at least 85 wt %. The porous ceramic body contains, as expressed on a relative oxide weight percent basis in terms of MgO, Al2O3, and SiO2 that is within a field defined by (15.4, 34.1, and 50.5), (12.2, 34.1, and 53.7), (13.3, 31.2, and 55.5), and (16.6, 31.1, and 52.3). Batch composition mixtures and methods of manufacturing a porous ceramic body using the batch compositions are provided, as are other aspects.

公开(公告)号：US11850540B2

公开(公告)日：2023-12-26

申请号：US17507020

申请日：2021-10-21

Applicant: DENSO CORPORATION

Inventor： Hirokatsu Imagawa

IPC: B01D46/24

CPC classification number: B01D46/2429 ,  B01D46/24491 ,  B01D46/24492 ,  B01D2275/30 ,  B01D2279/30

Abstract: An exhaust gas purification filter includes a plurality of cells each extending from an inflow end face to an outflow end face, a porous partition wall forming the cells in a partitioned manner, inflow-side sealing parts sealing openings on an inflow end face side of outflow cells where the exhaust gas flows out, and outflow-side sealing parts sealing openings on an outflow end face side of inflow cells where the exhaust gas flows in. Each of the inflow-side sealing parts has a porosity of less than 60%. The partition wall has a porosity of 60% or more and 70% or less. Assuming a pore size, at which cumulative pore volume is 50% in pore size distribution of the inflow-side sealing parts, is d50Pin, and a pore size, at which cumulative pore volume is 50% in pore size distribution of the partition wall, is d50B, the pore size d50Pin is less than 18 μm, and the pore size d50B is 18 μm or more and 25 μm or less.

公开(公告)号：US11840949B2

公开(公告)日：2023-12-12

申请号：US17487254

申请日：2021-09-28

Applicant: DENSO CORPORATION

Inventor： Kazuhiko Koike ,  Keisuke Mizutani ,  Kana Asaoku

IPC: F01N3/022 ,  B01D53/94 ,  B01D39/20 ,  B01D46/24 ,  B01J35/04

CPC classification number: F01N3/0222 ,  B01D39/2068 ,  B01D46/2429 ,  B01D46/24491 ,  B01D46/24492 ,  B01D53/94 ,  B01J35/04

Abstract: An exhaust gas purification filter includes a honeycomb structure part and sealing parts. The honeycomb structure part has a porous partition wall and a plurality of cells defined by the partition wall to form exhaust gas flow paths. The sealing parts seal alternately a gas inflow-side end face or a gas outflow-side end face of the cells. The exhaust gas purification filter includes fine pores with diameters of 10 μm or less measured by the mercury intrusion method that account for 5% or more of all pores by volume in the honeycomb structure part. The partition wall has a plurality of communication pores communicating between the cells adjacent to the partition wall and has constricted communication pore of which a largest diameter Φ1 and a smallest diameter Φ2 satisfy relationships Φ1≥50, 100×Φ2/Φ1≤20.

公开(公告)号：US20230311111A1

公开(公告)日：2023-10-05

申请号：US18173911

申请日：2023-02-24

Applicant: NGK Insulators, Ltd.

Inventor： Fumihiko YOSHIOKA ,  Yudai KURIMOTO

IPC: B01J35/04 ,  F01N3/28 ,  B01D53/94 ,  B01D46/24

CPC classification number: B01J35/04 ,  F01N3/2803 ,  B01D53/94 ,  B01D46/2482 ,  B01D46/2484 ,  B01D46/24491 ,  B01D46/2474 ,  B01D46/249 ,  F01N2330/32 ,  F01N2330/48 ,  B01D2255/9155 ,  B01D2279/30 ,  B01D2259/4566

Abstract: A honeycomb filter includes: a honeycomb structure having porous partition walls disposed so as to surround cells, and plugging portions disposed at any one of ends on the inflow end face and the ends on the outflow end face, of cells. In a cross section perpendicular to an extending direction of the cells, a thickness T1 of the partition walls in a central portion including a center of gravity O of the cross section is 0.17 to 0.32 mm, a thickness T2 of the partition walls in an outer peripheral portion is 70 to 90% of the thickness T1, and the outer peripheral portion extends from an outer peripheral edge of the cross section of honeycomb structure by 6 to 12% of a radius r which is from the center of gravity O of the cross section to the outer peripheral edge.

公开(公告)号：US20230311048A1

公开(公告)日：2023-10-05

申请号：US18177292

申请日：2023-03-02

Applicant: NGK Insulators, Ltd.

Inventor： Yudai KURIMOTO ,  Fumihiko YOSHIOKA

IPC: B01D46/24 ,  B01D39/20

CPC classification number: B01D46/2474 ,  B01D46/2482 ,  B01D46/24491 ,  B01D46/2429 ,  B01D46/24492 ,  B01D46/2484 ,  B01D39/2068 ,  B01D46/249 ,  B01D46/247 ,  B01D2279/30

Abstract: A honeycomb filter comprising a pillar-shaped honeycomb structure body having a porous partition wall and a plugging portion, wherein a thickness of the partition wall is 0.217 mm or less, a porosity of the partition wall is 57 to 63%, an average pore diameter of the partition wall is 6 to 14 μm, a number per unit area of pores which exist at a surface of the partition wall and which have equivalent circle opening diameters exceeding 3 μm is 800 to 1500 /mm2, an average equivalent circle opening diameter of pores which exist at a surface of the partition wall and which have equivalent circle opening diameters exceeding 3 μm is 6.7 to 12.5 μm, and in a pore diameter distribution of the partition wall, D10 is 3.0 to 7.0 μm, D90 is 13.0 to 27.0 μm, and (Log (D90)-Log (D10))/Log (D50) is 0.75 or less.

公开(公告)号：US20240246015A1

公开(公告)日：2024-07-25

申请号：US18542863

申请日：2023-12-18

Applicant: NGK INSULATORS, LTD.

Inventor： Yuta KATO ,  Shinji KATO ,  Narimasa SHINODA

IPC: B01D46/24 ,  B01D39/20 ,  B01D46/82 ,  B01D53/88 ,  F01N3/28

CPC classification number: B01D46/2455 ,  B01D39/2093 ,  B01D46/24491 ,  B01D46/24492 ,  B01D46/82 ,  B01D53/885 ,  F01N3/2828 ,  B01D2258/012 ,  F01N2370/02

Abstract: A honeycomb filter includes a pillar-shaped honeycomb structure having a porous partition wall disposed so as to surround a plurality of cells which serve as a fluid through channel extending from a first end face to a second end face; a plugging portion provided at either an end on the first end face side or the second end face side of the cell; and a catalyst for purifying exhaust gas that is loaded on the partition wall; wherein, in the state where the catalyst is not loaded, the partition wall has a pore volume of 0.07 to 0.30 cc/g of pores having a pore diameter of 10 μm or less, an average pore diameter of 11 to 23 μm, and a porosity of 56 to 65%.

公开(公告)号：US11878258B2

公开(公告)日：2024-01-23

申请号：US17538596

申请日：2021-11-30

Applicant: DENSO CORPORATION

Inventor： Hiroaki Kayama

IPC: B01D46/00 ,  B01D46/24

CPC classification number: B01D46/0005 ,  B01D46/2429 ,  B01D46/2459 ,  B01D46/24492 ,  B01D46/2455 ,  B01D46/24491

Abstract: An exhaust gas purification filter includes a plurality of cells extending in a filter axial direction, a porous partition separating and defining the plurality of cells, and a sealing section sealing the plurality of cells alternately at both filter ends. In the exhaust gas purification filter, the partition has a void volume of a reduced dale, Vvv, and a material volume of a reduced peak, Vmp, as volume parameters determined in noncontact surface roughness measurement on a surface of the partition, with their total value being 1.8 μm3/μm2 or less.

公开(公告)号：US11850541B2

公开(公告)日：2023-12-26

申请号：US17575309

申请日：2022-01-13

Applicant: DENSO CORPORATION

Inventor： Hiroaki Kayama

IPC: B01D46/24

CPC classification number: B01D46/2429 ,  B01D46/24491 ,  B01D46/24492 ,  B01D2279/30

Abstract: An exhaust gas purification filter includes a plurality of cells extending in a filter axial direction, a porous partition separating and defining the plurality of cells, and a sealing section sealing the plurality of cells alternately at both filter ends. The partition has a void volume of a reduced dale, Vvv, and a material volume of a reduced peak, Vmp, as volume parameters determined in noncontact surface roughness measurement on a surface of the partition, with their total value being more than 1.3 μm3/μm2 and 1.7 μm3/μm2 or less. The partition has a mean pore size of 12 μm or more and 20 μm or less. The partition also has a porosity of 50% or more and 75% or less.