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公开(公告)号：US20240058801A1
公开(公告)日：2024-02-22
申请号：US18269906
申请日：2022-01-24
发明人： Tatsuya OKUBO , Toru WAKIHARA , Kenta IYOKI , Junki TOMITA , Katsuhiko HAYASHI , Akihiro KANNO
CPC分类号： B01J29/7007 , B01J37/04 , B01J37/08 , B01J35/1038 , B01J20/186
摘要： Provided is a method for producing a beta zeolite, the method including bringing a beta zeolite parent powder synthesized without using an organic structure-directing agent into contact with an alkaline aqueous solution having a pH of 12 or higher. The liquid temperature of the alkaline aqueous solution is preferably se to 40° C. or above and 100° C. or below. The ratio of the parent powder to the alkaline aqueous solution is preferably set to 10 g/L or greater and 1000 g/L or less. The contact time is preferably 0.5 hours or longer and 48 hours or shorter. The SiO2/Al2O3 molar ratio is preferably s16 or less.
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2.发明公开公开(公告)号：US20240190881A1
公开(公告)日：2024-06-13
申请号：US18283340
申请日：2022-03-15
IPC分类号： C07D487/04 , C01B39/48
CPC分类号： C07D487/04 , C01B39/48 , C01P2002/60 , C01P2002/72
摘要： Provided are: a pyrrolidine derivative containing quaternary ammonium cations having a bicyclo framework that can be used as an organic structure directing agent; a method for producing the same; an MSE-type zeolite; and a method for producing the same.
The pyrrolidine derivative containing quaternary ammonium cations having a bicyclo framework has, in an X-ray diffraction spectrum, a highest peak intensity I in a diffraction angle (2θ) range of 14.0° to 16.0° and a highest peak intensity II in a diffraction angle (2θ) range of 17.0° to 19.0°, wherein a peak intensity ratio (I/II) of the peak intensity I to the peak intensity II is in a range of 0.4 or more and 1.5 or less.-
公开(公告)号：US20220212941A1
公开(公告)日：2022-07-07
申请号：US17606949
申请日：2020-06-29
摘要： A method for producing a zeolite with improved Si/Al according to the present invention includes the steps of: subjecting a zeolite synthesized without using an organic structure directing agent to ion exchange, thereby obtaining a sodium-type, a proton-type, or an ammonium-type zeolite; and bringing the zeolite subjected to ion exchange into contact with an ammonium salt solution, thereby dealuminating the zeolite. It is preferable that the ammonium salt is any one of ammonium oxalate, ammonium fluoride, ammonium fluorosilicate, ammonium fluoroborate, ammonium fluorophosphate, ammonium fluorotitanate, and ammonium florozirconate. It is also preferable that the zeolite after ion exchange is exposed to water vapor, and is then brought into contact with the ammonium salt solution.
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4.发明公开公开(公告)号：US20230271136A1
公开(公告)日：2023-08-31
申请号：US18018214
申请日：2021-07-29
发明人： Hidekazu GOTO , Katsuhiko HAYASHI , Mayuko SUWA
CPC分类号： B01D53/9486 , B01J20/18 , B01J21/06 , B01J23/42 , B01J23/44 , B01J23/462 , B01J20/28064
摘要： Provided are a hydrocarbon adsorbent, an exhaust gas purifying catalyst, and an exhaust gas purifying system, which are capable of adsorbing hydrocarbons, storing the adsorbed hydrocarbons up to a relatively high temperature, and desorbing the adsorbed and stored hydrocarbons at a relatively high temperature.
The hydrocarbon adsorbent contains a multipore zeolite containing, outside the zeolite framework, at least one metal selected from the group consisting of transition metals belonging to Groups 3 to 12 in the periodic table, amphoteric metals belonging to Groups 13 and 14 in the periodic table, alkali metals, and alkaline earth metals; and has a content ratio of the metal of 9% by mass or less relative to the multipore zeolite containing the metal.-
公开(公告)号：US20220203344A1
公开(公告)日：2022-06-30
申请号：US17606912
申请日：2020-06-29
摘要： Provided is a beta zeolite satisfying P>76.79Q−29.514 in a range in which Q is less than 0.4011 nm, wherein, P represents an AB value that is an intensity ratio of A to B, A represents a diffraction intensity of a main peak of the beta zeolite observed by X-ray diffraction measurement, B represents a diffraction intensity of the (116) plane of α-alumina obtained by X-ray diffraction measurement under the same conditions as those for the X-ray diffraction measurement on the beta zeolite, the α-alumina being the standard substance 674a distributed by the American National Institute of Standards and Technology, and Q represents a lattice interplanar spacing of the main peak of the beta zeolite observed by X-ray diffraction measurement. It is preferable that the formula (1) above is satisfied in a range in which Q is from 0.3940 to 0.4000 nm.
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公开(公告)号：US20190193056A1
公开(公告)日：2019-06-27
申请号：US16325637
申请日：2017-06-16
发明人： Katsuhiko HAYASHI , Kazuyuki ABE , Yunosuke NAKAHARA , Yasunori TABIRA , Tomoko NAKANO , Kazuhiro KANAZAWA , Yasushiro GOMI
CPC分类号： B01J23/626 , B01D53/94 , B01J23/62 , B01J35/0053 , B01J35/006 , B01J35/0066 , B01J35/10 , F01N3/10 , F01N3/2066 , F01N3/28 , F01N2370/02
摘要： An improved methane oxidation catalyst including tin oxide-supported platinum exerts superior methane oxidation activity at lower temperatures. The methane oxidation catalyst for oxidizing methane in exhaust gas includes platinum supported on tin oxide, and satisfies formula (1): y≤0.27 x, where x is a platinum content (wt %) relative to tin oxide, and y is a ratio of a peak intensity of (111)-faceted platinum relative to a peak intensity of (111)-faceted tin oxide (Pt(111)/SnO2(111)), in a diffraction pattern (2θ=37 to 41°) obtained by measurement with an X-ray diffractometer (XRD).
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