- 专利标题: METHOD FOR PRODUCING EXHAUST GAS PURIFYING FILTER, EXHAUST GAS PURIFYING FILTER, AND EXHAUST GAS PURIFICATION DEVICE
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申请号: US15741341申请日: 2016-06-14
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公开(公告)号: US20180185826A1公开(公告)日: 2018-07-05
- 发明人: Masatoshi Uetani , Takahiro Mishima
- 申请人: OTSUKA CHEMICAL CO., LTD.
- 申请人地址: JP Osaka-city, Osaka
- 专利权人: OTSUKA CHEMICAL CO., LTD.
- 当前专利权人: OTSUKA CHEMICAL CO., LTD.
- 当前专利权人地址: JP Osaka-city, Osaka
- 优先权: JP2015-137042 20150708
- 国际申请: PCT/JP2016/067672 WO 20160614
- 主分类号: B01J29/46
- IPC分类号: B01J29/46 ; F01N3/035 ; F01N3/022 ; B01J21/06 ; B01J35/04 ; B01J37/00 ; B01J37/08 ; B01J37/30 ; B01D53/94
摘要:
Provided is a method for producing an exhaust gas purifying filter that enables a catalyst to be supported on an exhaust gas purifying filter in a simple manner without the need for impregnation with or application of a solution containing catalyst particles after the production of the exhaust gas purifying filter and also enables an exhaust gas purifying filter having a high NOx reduction efficiency to be obtained. The method includes the steps of: extruding a mixture containing zeolite and raw material particles of a support to prepare a green body; firing the green body to prepare a sintered body; treating the sintered foody with alkali under a condition at pH 9.5 or more; and exchanging an element at an ion-exchange site of the zeolite contained in the alkali-treated sintered body with a transition metal.