公开(公告)号：US10688480B2

公开(公告)日：2020-06-23

申请号：US16078427

申请日：2017-07-26

申请人： MITSUI MINING & SMELTING CO., LTD.

发明人： Jo Nishikawa ,  Satoshi Watanabe ,  Michitaka Yamaguchi

IPC分类号： B01J29/85 ,  B01J20/18 ,  B01J29/70 ,  F01N3/10 ,  B01D53/92 ,  F01N3/08 ,  B01D53/94 ,  B01J20/28

摘要： An exhaust gas purifying composition of the present invention contains zeolite that is BEA zeolite having an SiO2/Al2O3 molar ratio of greater than 25 and 600 or less and containing phosphorus. Furthermore, the exhaust gas purifying composition preferably contains zirconium in addition to phosphorus. Furthermore, the zeolite has an SiO2/Al2O3 molar ratio of from 30 to 150. The present invention provides an exhaust gas purifying composition having excellent HC adsorbability for exhaust gas purification in internal combustion engines such as gasoline engines.

公开(公告)号：US11633723B2

公开(公告)日：2023-04-25

申请号：US16760479

申请日：2018-10-03

申请人： Mitsui Mining & Smelting Co., Ltd.

发明人： Michitaka Yamaguchi ,  Satoshi Watanabe

IPC分类号： B01J23/50 ,  B01D53/94 ,  B01J21/04 ,  B01J23/34 ,  B01J35/02 ,  B01J37/00 ,  F01N3/28

摘要： A composition for exhaust gas purification containing Y—Mn—O and Al2O3 and having a specific surface area (SSA) retention satisfying inequality (1) SSA retention (%) >−61.54×(Y—Mn—O ratio)+75.55 and inequality (2) SSA retention (%) >45 (2), where SSA retention is represented by (SSA after aging)/(initial SSA)×100 (%). The SSA after aging and the initial SSA are as defined in the description. The Y—Mn—O ratio is a mass ratio of Y—Mn—O to the sum of Y—Mn—O and Al2O3 in the composition for exhaust gas purification, being represented by Y—Mn—O/(Y—Mn—O+Al2O3).

公开(公告)号：US10434502B2

公开(公告)日：2019-10-08

申请号：US16307768

申请日：2017-07-26

申请人： Mitsui Mining & Smelting Co., Ltd.

发明人： Jo Nishikawa ,  Satoshi Watanabe ,  Michitaka Yamaguchi

IPC分类号： B01J29/80 ,  B01J23/648 ,  F01N3/035 ,  C10G11/05

摘要： The present invention provides an exhaust gas purifying composition containing BEA zeolite containing phosphorus, wherein an amount of phosphorus is such that a molar ratio thereof with respect to Al in the zeolite is 0.5 or greater, and a maintaining factor RS of a specific surface area of the exhaust gas purifying composition after heating at 980° C. for 25 hours is 35% or greater. Furthermore, the present invention also provides an exhaust gas purifying composition containing phosphorus-containing zeolite, wherein an amount of phosphorus is such that a molar ratio thereof with respect to Al in the zeolite is from 0.5 to 8, and a maintaining factor Rd of a crystallite diameter after heating at 980° C. for 25 hours is 50% or greater. The exhaust gas purifying composition of the present invention has excellent HC purifiability for exhaust gas purification in internal combustion engines such as gasoline engines.