Patents Assigned to Rasa Industries Ltd.
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Patent number: 11712683Abstract: Provided is a new heat source device that utilizes the catalytic reaction heat as a heat source for industries. The heat source device 100 utilizing the catalytic reaction heat of silver zeolite 1 includes an accommodation container 10 for accommodating the silver zeolite 1 while ensuring air permeability, wherein the accommodation container 10 is configured to be ventilated with a mixed gas G containing hydrogen, steam, and air. The mixed gas has a hydrogen concentration of 1 to 20% by volume, a steam concentration of 1 to 95% by volume, an air concentration of 1 to 95% by volume, and a temperature of 100° C. or higher.Type: GrantFiled: October 5, 2018Date of Patent: August 1, 2023Assignee: Rasa Industries, Ltd.Inventors: Toshiki Kobayashi, Koji Endo
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Publication number: 20210304912Abstract: Provided is a method for treating radioactive iodine contained in steam discharged from a nuclear power facility, including a filling step of filling an air-permeable container with a granulated radioactive iodine adsorbent of zeolite X, wherein ion exchange sites of the zeolite X are substituted with silver so that a size of minute pores of the zeolite X is suited to a size of a hydrogen molecule, and the radioactive iodine adsorbent has a silver content of 36 wt % or more when dried, a particle size of 10×20 mesh, a hardness of 94% or more, and a water content of 12 wt % or less when dried at 150° C. for 3 h and thereby reduced in weight; and a flow passing step of passing a flow of the steam discharged from the nuclear power facility, through the container filled with the radioactive iodine adsorbent.Type: ApplicationFiled: April 15, 2021Publication date: September 30, 2021Applicant: Rasa Industries, Ltd.Inventors: Toshiki KOBAYASHI, Koji ENDO
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Patent number: 10434494Abstract: Provided are a filtration material for filtered venting and a filtered venting device that are more effective in adsorbing radioactive iodine than in the conventional art and are useful for addressing severe accidents. The filtration material for filtered venting comprises granulated zeolite L, wherein at least a portion of the ion exchange sites of the zeolite L are substituted with silver. Of the ion exchange sites, a constitution ratio (a/b) of ion exchange sites (a) substituted with silver to ion exchange sites (b) not substituted with silver is 25/75-55/45. The zeolite L has a silver content of 7-12 wt % on a dry weight basis.Type: GrantFiled: March 8, 2016Date of Patent: October 8, 2019Assignee: Rasa Industries, Ltd.Inventors: Toshiki Kobayashi, Koji Endo
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Publication number: 20180029007Abstract: Provided are a filtration material for filtered venting and a filtered venting device that are more effective in adsorbing radioactive iodine than in the conventional art and are useful for addressing severe accidents. The filtration material for filtered venting comprises granulated zeolite L, wherein at least a portion of the ion exchange sites of the zeolite L are substituted with silver. Of the ion exchange sites, a constitution ratio (a/b) of ion exchange sites (a) substituted with silver to ion exchange sites (b) not substituted with silver is 25/75-55/45. The zeolite L has a silver content of 7-12 wt % on a dry weight basis.Type: ApplicationFiled: March 8, 2016Publication date: February 1, 2018Applicant: Rasa Industries, Ltd.Inventors: Toshiki KOBAYASHI, Koji ENDO
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Patent number: 5884856Abstract: A method and system for reclaiming aggregate from concrete waste material includes crushing step and means of compression-crushing lumps of concrete waste material into a crushed mixture, and sorting the crushed mixture by size thereof, grinding step and means of rotating the crushed mixture sorted to grind it with a grinding member which rotates in an opposite direction to the rotating direction of the crushed mixture sorted, thereby peeling mortar from gravel, crushed stones and sand of the crushed mixture to obtain a mixture of gravel, crushed stones, sand, cement and mortar, and product separating step and means of separating the mixture of gravel, crushed stones, sand, cement and mortar into gravel and crushed stones, sand, cement and mortar.Type: GrantFiled: November 19, 1997Date of Patent: March 23, 1999Assignees: Shinwa Plant Kikou Co., Ltd., Kawasaki Jukogyo Kabushiki Kaisha, Rasa Industries, Ltd., Kyoboshi Co., Ltd.Inventor: Kazutoshi Isaji
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Patent number: 5699969Abstract: A method and system for reclaiming aggregate from concrete waste material includes crushing step and means of compression-crushing lumps of concrete waste material into a crushed mixture, and sorting the crushed mixture by size thereof, grinding step and means of rotating the crushed mixture sorted to grind it with a grinding member which rotates in an opposite direction to the rotating direction of the crushed mixture sorted, thereby peeling mortar from gravel, crushed stones and sand of the crushed mixture to obtain a mixture of gravel, crushed stones, sand, cement and mortar, and product separating step and means of separating the mixture of gravel, crushed stones, sand, cement and mortar into gravel and crushed stones, sand, cement and mortar.Type: GrantFiled: January 11, 1996Date of Patent: December 23, 1997Assignees: Shinwa Plant Kikou Co., Ltd., Kawasaki Jukogyo Kabushiki Kaisha, Rasa Industries Ltd., Kyoboshi Co., Ltd.Inventor: Kazutoshi Isaji