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公开(公告)号:US11447396B2
公开(公告)日:2022-09-20
申请号:US16767011
申请日:2018-11-28
申请人: Mitsui Mining & Smelting Co., Ltd. , NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY , NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY
发明人: Yoshihiro Kamimura , Akira Endou , Yasuo Yamazaki , Naonobu Katada , Satoshi Suganuma , Yoshihiro Kubota , Satoshi Inagaki
摘要: Provided are the following: an MWW type zeolite which has many Brønsted acid sites when in the form of a proton type and which is highly suitable as a cracking catalyst for cumene; a method for producing same; and an application of same. The present invention provides an MWW type zeolite in which the ratio (B/A) of the peak intensity (B) attributable to tetracoordinate aluminum relative to the peak intensity (A) attributable to hexacoordinate aluminum is 2 or more in 27Al MAS NMR, when measured as an ammonium type. The present invention also provides a method for producing an MWW type zeolite, the method having a step for carrying out a hydrothermal synthesis reaction in the presence of: a seed crystal of an MWW type zeolite containing no organic structure-directing agent; and a reaction mixture containing a silica source, an alumina source, an alkali source, an organic structure-directing agent, and water. The reaction mixture satisfies the following molar ratio: X/SiO2
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公开(公告)号:US11065606B2
公开(公告)日:2021-07-20
申请号:US16758193
申请日:2018-10-25
申请人: Mitsui Mining & Smelting Co., Ltd. , NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY , NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY
发明人: Yoshihiro Kubota , Satoshi Inagaki , Naonobu Katada , Satoshi Suganuma , Yasuo Yamazaki , Takahiro Kogawa
摘要: The purpose of the present invention is to provide a metal-substituted beta zeolite that exhibits a more excellent catalytic performance than conventional one, and a method for producing the same. The present invention provides a metal-substituted beta zeolite by subjecting an alkali metal-form beta zeolite produced without using an organic structure-directing agent to ion exchange with ammonium ion and then, using a filter cake procedure, to ion exchange with copper ion or iron(II) ion. The present invention also provides a metal-substituted beta zeolite which has been ion exchanged with copper ion or iron(II) ion and in which the amount of Lewis acid sites is greater than the amount of Bronsted acid sites when the amount of Bronsted acid sites and the amount of Lewis acid sites are measured by ammonia infrared-mass spectroscopy temperature-programmed desorption on the as-produced state.
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公开(公告)号:US11485644B2
公开(公告)日:2022-11-01
申请号:US16767011
申请日:2018-11-28
申请人: Mitsui Mining & Smelting Co., Ltd. , NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY , NATIONAL UNIVERSITY CORPORATION YOKOHAMA NATIONAL UNIVERSITY
发明人: Yoshihiro Kamimura , Akira Endou , Yasuo Yamazaki , Naonobu Katada , Satoshi Suganuma , Yoshihiro Kubota , Satoshi Inagaki
摘要: Provided are the following: an MWW type zeolite which has many Brønsted acid sites when in the form of a proton type and which is highly suitable as a cracking catalyst for cumene; a method for producing same; and an application of same. The present invention provides an MWW type zeolite in which the ratio (B/A) of the peak intensity (B) attributable to tetracoordinate aluminum relative to the peak intensity (A) attributable to hexacoordinate aluminum is 2 or more in 27Al MAS NMR, when measured as an ammonium type. The present invention also provides a method for producing an MWW type zeolite, the method having a step for carrying out a hydrothermal synthesis reaction in the presence of: a seed crystal of an MWW type zeolite containing no organic structure-directing agent; and a reaction mixture containing a silica source, an alumina source, an alkali source, an organic structure-directing agent, and water. The reaction mixture satisfies the following molar ratio: X/SiO2
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