公开(公告)号：US11065597B2

公开(公告)日：2021-07-20

申请号：US16475226

申请日：2017-12-26

Applicant: TOSOH CORPORATION

Inventor： Shigeru Hirano ,  Keisuke Tokunaga ,  Hiroshi Okaniwa ,  Megu Fukui

IPC: B01J20/18 ,  B01J20/02 ,  B01J20/28 ,  C01B39/46 ,  B01J29/74 ,  B01J29/06 ,  B01J29/67 ,  B01J29/65 ,  B01J29/072 ,  B01J29/68 ,  B01J29/064 ,  B01J29/76 ,  B01J37/00 ,  B01J35/00 ,  B01J20/04 ,  B01J37/02 ,  B01J37/30 ,  C01B39/44

Abstract: A xenon adsorbent capable of efficiently adsorbing xenon, even at a low concentration, from a mixture gas is Provided.
A xenon adsorbent comprising a zeolite having a pore size in the range of 3.5 to 5 Å and a silica alumina molar ratio in the range of 10 to 30.

公开(公告)号：US10603652B2

公开(公告)日：2020-03-31

申请号：US16078902

申请日：2017-02-23

Applicant: TOSOH CORPORATION

Inventor： Keisuke Tokunaga ,  Shigeru Hirano ,  Yoju Shimizu ,  Hajime Funakoshi

IPC: B01J20/28 ,  B01J20/18 ,  C01B39/22 ,  B01J20/30 ,  B01J29/12 ,  B01J35/10 ,  B01J35/02 ,  B01J37/30

Abstract: Provided are: a silver-carrying zeolite molded article in which aggregation of silver is inhibited and which has excellent capability of dispersing silver, when compared to conventional silver-carrying zeolite molded articles; and a method for producing the silver-carrying zeolite molded article. In the silver-carrying zeolite molded article, the molar ratio of Si/Al2 is 2.0-3.0, the molar ratio of (alkali metal+Ag)/Al is 0.9-1.1, the total amount of SiO2, Al2O3, Ag2O, and alkali metal oxides is 90 wt % or more, the contained amount of silver ions is 5 wt % or more, and only a single type of zeolite is contained. The molded article can be produced by subjecting a zeolite molded article having zeolite purity of 90% or more to an ion exchange treatment using a silver-containing aqueous solution.

公开(公告)号：US12017201B2

公开(公告)日：2024-06-25

申请号：US17620085

申请日：2020-06-17

Applicant: TOSOH CORPORATION

Inventor： Yuki Oba ,  Keisuke Tokunaga

IPC: B01J20/18 ,  B01J20/12 ,  B01J20/28 ,  B01J20/30

CPC classification number: B01J20/18 ,  B01J20/12 ,  B01J20/28011 ,  B01J20/2803 ,  B01J20/3014 ,  B01J20/3042 ,  B01J20/3078

Abstract: A high-strength zeolite molding includes 10 parts by weight or more and 40 parts by weight or less of clay relative to 100 parts by weight of zeolite, and having a compressive strength of 20 N or more, in which the zeolite contains at least one zeolite that has Si/Al2 of 300 or more and 100000 or less and a water adsorption amount of 10 (g/100 g) or less under conditions of 25° C. and a relative pressure of 0.5, and the clay contains at least one clay that has a solid acidity of 0.15 mmol/g or less as determined by a NH3-TPD method. A method for producing includes kneading, molding, drying and disintegrating a product and then firing at 400° C. or higher and 700° C. or lower.

公开(公告)号：US11471855B2

公开(公告)日：2022-10-18

申请号：US16239177

申请日：2019-01-03

Applicant: TOSOH CORPORATION ,  EBARA CORPORATION

Inventor： Yoju Shimizu ,  Hajime Funakoshi ,  Keisuke Tokunaga ,  Shigeru Hirano ,  Takashi Sakuma ,  Makoto Komatsu ,  Takeshi Izumi

IPC: B01J20/10 ,  C01B33/20 ,  G21F9/12 ,  B01J20/02 ,  B01J20/28 ,  C02F1/28 ,  B01J20/30 ,  C02F101/10 ,  C02F103/06 ,  C02F103/08

Abstract: The present invention provides a composition that includes a silicotitanate that has a sitinakite structure, the composition having higher cesium adsorptivity than conventional compositions. The present invention also provides a production method for the composition that includes a silicotitanate that has a sitinakite structure. The production method does not require the use of hazardous or deleterious materials, can generate a product using a compound that is easily acquired, and can use a general-purpose autoclave. Also provided is a silicotitanate composition that has higher strontium adsorptivity than the present invention. Provided is a silicotitanate composition that contains niobium and a silicotitanate that has a sitinakite structure, the composition having at least two or more diffraction peaks selected from the group consisting of 2θ=8.8°±0.5°, 2θ=10.0°±0.5°, and 2θ=29.6°±0.5°.

公开(公告)号：US11110430B2

公开(公告)日：2021-09-07

申请号：US16079177

申请日：2017-02-23

Applicant: EBARA CORPORATION ,  TOSOH CORPORATION

Inventor： Takashi Sakuma ,  Makoto Komatsu ,  Takeshi Izumi ,  Keisuke Tokunaga ,  Shigeru Hirano

IPC: B01D53/02 ,  B01J20/18 ,  C01B39/22 ,  G21F9/02 ,  G21F9/12 ,  C01B39/18 ,  B01J20/28 ,  B01J20/30 ,  B01D53/04 ,  C01B39/14

Abstract: The present invention provides a treatment method of a radioactive iodine-containing fluid, comprising passing the radioactive iodine-containing fluid through an adsorbent for iodine consisting of a silver-containing binderless zeolite molded body having a silver content of 50 mass % or less, to adsorb the radioactive iodine on the adsorbent for iodine.

公开(公告)号：US10343136B2

公开(公告)日：2019-07-09

申请号：US15322918

申请日：2015-07-17

Applicant: TOSOH CORPORATION

Inventor： Yoju Shimizu ,  Hajime Funakoshi ,  Keisuke Tokunaga ,  Shigeru Hirano

IPC: C02F1/42 ,  B01J20/10 ,  C01B33/20 ,  C02F1/28 ,  B01J20/30 ,  G21F9/12 ,  B01J20/02 ,  B01J20/28 ,  B01D15/00 ,  C02F101/10 ,  C02F103/06 ,  C02F103/08

Abstract: The present invention provides a composition that includes a silicotitanate that has a sitinakite structure, the composition having higher cesium adsorptivity than conventional compositions. The present invention also provides a production method for the composition that includes a silicotitanate that has a sitinakite structure. The production method does not require the use of hazardous or deleterious materials, can generate a product using a compound that is easily acquired, and can use a general-purpose autoclave. Also provided is a silicotitanate composition that has higher strontium adsorptivity than the present invention. Provided is a silicotitanate composition that contains niobium and a silicotitanate that has a sitinakite structure, the composition having at least two or more diffraction peaks selected from the group consisting of 2θ=8.8°±0.5°, 2θ=10.0°±0.5°, and 2θ=29.6°±0.5°.