公开(公告)号：US10710023B2

公开(公告)日：2020-07-14

申请号：US16078082

申请日：2017-02-23

Applicant: CATALER CORPORATION

Inventor： Koki Yanagawa ,  Satoshi Matsueda ,  Yu Sakurada ,  Chihiro Kasuya

IPC: F01N3/20 ,  B01D53/94 ,  B01J37/08 ,  B01J27/053 ,  B01J35/00 ,  B01J37/02 ,  F01N3/10 ,  B01J35/04 ,  B01J37/04

Abstract: An exhaust gas purification catalyst, characterized by having a catalyst layer containing palladium, rhodium, and alumina, which supports a sulfate of an alkaline-earth metal selected from barium sulfate and strontium sulfate, and the correlation coefficients ρPd,AE and ρRh,AE calculated from the characteristic X-ray intensity measured using an electron beam micro-analyzer for the palladium, rhodium, and alkaline-earth metal being +0.75 to +1.00 and 0.00 to +0.25, respectively, using 350 points as measurement points obtained by equally dividing the catalyst layer into 351 parts in the thickness direction on a virtual straight line that runs through the catalyst layer in the thickness direction.

公开(公告)号：US10828602B2

公开(公告)日：2020-11-10

申请号：US15771902

申请日：2016-10-24

Applicant: CATALER CORPORATION

Inventor： Yu Sakurada ,  Satoshi Matsueda ,  Sho Hoshino ,  Ryota Nakashima

IPC: B01D53/94 ,  B01J37/04 ,  B01J23/63 ,  B01J35/00 ,  B01J23/10 ,  B01J23/42 ,  B01J23/46 ,  B01J23/44 ,  B01J21/04 ,  B01J21/06 ,  B01J21/08

Abstract: A novel exhaust gas purifying catalyst, method for producing same, and an exhaust gas purification device using same, which are capable of maintaining catalytic activity of a precious metal at a higher level than compared with conventional exhaust gas purifying catalysts. An exhaust gas purifying catalyst having a first carrier particle, a second carrier particle, and a precious metal catalyst particle carried on the first and second carrier particles, wherein: the first carrier particle contains a rare-earth oxide other than ceria and at least one metal oxide selected from the group consisting of silica, alumina, ceria, zirconia, and titania; the second carrier particle contains a rare-earth oxide other than ceria; and the contained amount of the rare-earth oxide in the second carrier particle is higher than the contained amount of the rare-earth oxide in the first carrier particle.

公开(公告)号：US11179701B2

公开(公告)日：2021-11-23

申请号：US16086869

申请日：2017-03-09

Applicant: CATALER CORPORATION

Inventor： Yu Sakurada ,  Takahiro Harada ,  Ryota Nakashima

IPC: B01J23/63 ,  B01J37/04 ,  B01J37/08 ,  B01J35/00 ,  B01D53/94 ,  F01N3/20

Abstract: An exhaust gas purifying catalyst having first carrier particles, second carrier particles, and precious metal catalyst particles supported on the first and second carrier particles, wherein: the first carrier particles contain ceria, zirconia, and a rare-earth oxide other than ceria; the second carrier particles contain a rare-earth oxide other than ceria, and may contain ceria and zirconia; the contained proportion of ceria and zirconia in the first carrier particles is higher than the contained proportion of ceria and zirconia in the second carrier particles; the contained proportion of the rare-earth oxide in the second carrier particles is higher than the contained proportion of the rare-earth oxide in the first carrier particles; and the contained proportion of ceria in the first carrier particles is 45 wt % or less, while the precious metal catalyst particles include rhodium particles.