Patents by Inventor Daisuke HOTTA

Daisuke HOTTA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20260115663
    Abstract: A raw material solution concentration system that has: a first unit for obtaining a concentrated raw material solution and a diluted induction solution by bringing a raw material solution containing a solvent and a solute into contact with an induction solution containing an induction solute through a forward osmosis membrane and transferring the solvent in the raw material solution into the induction solution and the induction solute in the induction solution into the raw material solution; and a second unit for performing a freeze-dry treatment on the concentrated raw material solution and obtaining a further-concentrated product.
    Type: Application
    Filed: December 10, 2025
    Publication date: April 30, 2026
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Masato Mikawa, Mitsuru Fujita, Daisuke Hotta
  • Patent number: 12420233
    Abstract: Provided is a system preventing or reducing adhesion of a raw material component to a membrane surface and increasing the recovery rate of the raw material component after concentration. A raw material liquid concentration system for a medicine production process comprising a forward osmosis membrane unit having a forward osmosis membrane, and a raw material liquid side space and an inductive solution side space which are separated from each other by the forward osmosis membrane; a raw material liquid channel supplying, to the raw material liquid side space, a raw material liquid containing a solvent and a solute; an inductive solution channel supplying, to the inductive solution side space, an inductive solution containing an inductive material; a concentrated liquid channel removing a concentrated raw material liquid from the forward osmosis membrane unit; and a diluted inductive solution channel removing a diluted inductive solution from the forward osmosis membrane unit.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: September 23, 2025
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Mitsuru Fujita, Masato Mikawa, Daisuke Hotta
  • Patent number: 12274984
    Abstract: [PROBLEM] To provide an evaluation method and evaluation device with which the practical performance of a forward osmosis membrane can more accurately be measured. [SOLVING MEANS] Provided is a method for evaluating a forward osmosis membrane module. The method includes the steps of, in a forward osmosis membrane module having spaces which are partitioned by a forward osmosis membrane including a porous support body and a separation function layer stacked thereon, connecting a feed solution line to a space on the separation function layer side, and connecting a draw solution line to a space on the porous support body side, and moving a solvent in the feed solution into the draw solution via the forward osmosis membrane while adjusting a physical pressure differential across the forward osmosis membrane to a constant value within the range of more than 0 kPa to 200 kPa.
    Type: Grant
    Filed: June 28, 2022
    Date of Patent: April 15, 2025
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventor: Daisuke Hotta
  • Patent number: 12251662
    Abstract: Provided are a forward osmosis membrane, a forward osmosis membrane module, and a manufacturing method thereof, wherein a forward osmosis membrane, which achieves an extremely favorable reduction in the reverse diffusion of salt compared to the prior art and has a predetermined water permeability, is developed thereby bringing about: practicality in that a liquid-like raw material solution used in actual concentration operations can be concentrated with suppressed diffusion of an induction solution even when used multiple times; and durability in that the performance of the membrane can be maintained within a predetermined range even when a raw material solution having an osmotic pressure is concentrated multiple times.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: March 18, 2025
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventor: Daisuke Hotta
  • Publication number: 20240367108
    Abstract: Provided is a forward osmosis membrane module composed of a plurality of hollow-fiber forward osmosis membranes. The forward osmosis membranes are each provided with a separation function layer on a surface of a hollow-fiber support membrane having a porous support body. The membrane surface area of the forward osmosis membrane module is 0.1 m2 or more. The porous support body is such that the porosity of a dense layer up to 1.0 ?m from the interface with the separation function layer is 40% or less. The average thickness of the separation function layer is 2.0 ?m or less, and the variation coefficient of the average thickness of the separation function layer is 30% or less in the radial direction and longitudinal direction of the forward osmosis membrane module.
    Type: Application
    Filed: June 13, 2022
    Publication date: November 7, 2024
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventor: Daisuke Hotta
  • Publication number: 20240269619
    Abstract: This forward osmosis membrane has a support membrane, and a separation functional layer on the support membrane. The support membrane has a porous support body. After water has been positioned on the separation functional layer side and a 3.5 mass % sodium chloride aqueous solution has been positioned on the porous support body side, with the forward osmosis membrane interposed therebetween, and a forward osmosis process has been performed with a transmembrane pressure difference P=100 kPa and with the porous support body side being forward, when a forward osmosis process is then performed with a transmembrane pressure difference P=20 kPa and with the porous support body side being forward, the ratio (R100/F100) of the permeated water quantity (F100, unit: kg/(m2×hr)) and the salt reverse diffusion quantity (R100, unit: g/(m2×hr)) satisfies the expression 0 g/kg?R100/F100?0.12 g/kg.
    Type: Application
    Filed: May 19, 2022
    Publication date: August 15, 2024
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventor: Daisuke Hotta
  • Publication number: 20240269618
    Abstract: A forward osmosis membrane comprising a support membrane and an isolative function layer, wherein: the support membrane is equipped with at least a porous support body; the isolative function layer is provided on the porous support body; the porous support body is provided with a compact layer and a macrovoid layer in this order in the depth direction from the surface thereof which contacts the isolative function layer; the thickness of the compact layer is 1.0-9.5 ?m; there are 0-0.20 macrovoids/?m in a region A which extends to a depth of 0-5.0 ?m from the interface between the isolative function layer and the porous support body; and there are 0.04-0.40 macrovoids/?m in a region B which extends to a depth of 5.0-10.0 ?m from the interface between the isolative function layer and the porous support body.
    Type: Application
    Filed: June 10, 2022
    Publication date: August 15, 2024
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Daisuke Hotta, Tomotaka Hashimoto
  • Publication number: 20240261737
    Abstract: The present invention provides: a forward osmosis membrane which achieves good water permeability, good rejection performance and good resistance against the counter pressure at the same time; and a method for producing a forward osmosis membrane, the method being capable of easily producing the above-described forward osmosis membrane. One embodiment of the present invention provides a forward osmosis membrane which comprises a porous supporting membrane and a separation function layer that is arranged on the porous supporting membrane, wherein: the porous supporting membrane is in contact only with the separation function layer; and the separation function layer is composed of a polyamide layer.
    Type: Application
    Filed: June 28, 2022
    Publication date: August 8, 2024
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventor: Daisuke Hotta
  • Publication number: 20230356149
    Abstract: A feedstock solution flow concentration system, which has a first step for counterflowing or parallel flowing a feedstock solution flow a containing a solute and a solvent b, and a draw solution flow d via a forward osmosis membrane o and transferring the solvent b in the feedstock solution flow a to the draw solution flow d to obtain a concentrated feedstock solution flow c, which is the feedstock solution flow which has been concentrated, and a diluted draw solution flow e, which is the draw solution flow which has been diluted.
    Type: Application
    Filed: July 21, 2023
    Publication date: November 9, 2023
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Daisuke Hotta, Mitsuru Fujita, Masato Mikawa
  • Publication number: 20220410073
    Abstract: [PROBLEM] To provide an evaluation method and evaluation device with which the practical performance of a forward osmosis membrane can more accurately be measured. [SOLVING MEANS] Provided is a method for evaluating a forward osmosis membrane module. The method includes the steps of, in a forward osmosis membrane module having spaces which are partitioned by a forward osmosis membrane including a porous support body and a separation function layer stacked thereon, connecting a feed solution line to a space on the separation function layer side, and connecting a draw solution line to a space on the porous support body side, and moving a solvent in the feed solution into the draw solution via the forward osmosis membrane while adjusting a physical pressure differential across the forward osmosis membrane to a constant value within the range of more than 0 kPa to 200 kPa.
    Type: Application
    Filed: June 28, 2022
    Publication date: December 29, 2022
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventor: Daisuke Hotta
  • Publication number: 20220226778
    Abstract: Provided are a forward osmosis membrane, a forward osmosis membrane module, and a manufacturing method thereof, wherein a forward osmosis membrane, which achieves an extremely favorable reduction in the reverse diffusion of salt compared to the prior art and has a predetermined water permeability, is developed thereby bringing about: practicality in that a liquid-like raw material solution used in actual concentration operations can be concentrated with suppressed diffusion of an induction solution even when used multiple times; and durability in that the performance of the membrane can be maintained within a predetermined range even when a raw material solution having an osmotic pressure is concentrated multiple times. According to an aspect, provided is a forward osmosis membrane having a polymeric separation active layer disposed on the surface of a microporous support membrane, wherein when purified water is placed as a raw material solution on the separation active layer side and 3.
    Type: Application
    Filed: May 29, 2020
    Publication date: July 21, 2022
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventor: Daisuke Hotta
  • Publication number: 20220226777
    Abstract: Provided is a system that can prevent or reduce adhesion of a raw material component to a membrane surface and increase the recovery rate of the raw material component after concentration. A raw material liquid concentration system for a medicine production process is provided with: a forward osmosis membrane unit having a forward osmosis membrane, and a raw material liquid side space and an inductive solution side space which are separated from each other by the forward osmosis membrane; a raw material liquid channel for supplying, to the raw material liquid side space, a raw material liquid containing a solvent and a solute; an inductive solution channel for supplying, to the inductive solution side space, an inductive solution containing an inductive material; a concentrated liquid channel for removing a concentrated raw material liquid from the forward osmosis membrane unit; and a diluted inductive solution channel for removing a diluted inductive solution from the forward osmosis membrane unit.
    Type: Application
    Filed: May 29, 2020
    Publication date: July 21, 2022
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Mitsuru Fujita, Masato Mikawa, Daisuke Hotta
  • Publication number: 20220187015
    Abstract: A raw material solution concentration system that has: a first unit for obtaining a concentrated raw material solution and a diluted induction solution by bringing a raw material solution containing a solvent and a solute into contact with an induction solution containing an induction solute through a forward osmosis membrane and transferring the solvent in the raw material solution into the induction solution and the induction solute in the induction solution into the raw material solution; and a second unit for performing a freeze-dry treatment on the concentrated raw material solution and obtaining a further-concentrated product.
    Type: Application
    Filed: May 28, 2020
    Publication date: June 16, 2022
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Masato Mikawa, Mitsuru Fujita, Daisuke Hotta
  • Patent number: 11250378
    Abstract: An aircraft tire management system includes a management device capable of communicating with a tire manufacturer, an MRO-providing company, and an airline through a network, and an acquisition device configured to acquire tire individual information on aircraft tires and wheel individual information on wheels. The acquisition device sends the tire individual information acquired in the tire manufacturer to the management device, sends the tire individual information and the wheel individual information on each aircraft tire fitted on the corresponding wheel acquired in the MRO-providing company to the management device, and sends the wheel individual information acquired in the airline to the management device. The management device links the tire individual information with the wheel individual information, and outputs tire management information including at least tire identification information, location information, and date and time information.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: February 15, 2022
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Makoto Ishiyama, Takumi Kakara, Daisuke Hotta
  • Publication number: 20220005553
    Abstract: Provided is a supporting method of supporting concentration of maple sap in production of a maple syrup liquid, the supporting method including: acquiring current sap information including current color information and a current sugar content of the maple sap; and outputting predicted color information indicating a color of the maple syrup liquid predicted based on the current sap information and a target sugar content of a concentrated liquid obtained by concentrating the maple sap.
    Type: Application
    Filed: June 30, 2021
    Publication date: January 6, 2022
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Daisuke HOTTA, Yuki SUGA, Tomotaka HASHIMOTO, Noboru KUBOTA
  • Publication number: 20210339194
    Abstract: A feedstock solution flow concentration system, which has a first step for counterflowing or parallel flowing a feedstock solution flow a containing a solute and a solvent b, and a draw solution flow d via a forward osmosis membrane o and transferring the solvent b in the feedstock solution flow a to the draw solution flow d to obtain a concentrated feedstock solution flow c, which is the feedstock solution flow which has been concentrated, and a diluted draw solution flow e, which is the draw solution flow which has been diluted.
    Type: Application
    Filed: September 3, 2019
    Publication date: November 4, 2021
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Daisuke Hotta, Mitsuru Fujita, Masato Mikawa
  • Publication number: 20200364651
    Abstract: An aircraft tire management system includes a management device capable of communicating with a tire manufacturer, an MRO-providing company, and an airline through a network, and an acquisition device configured to acquire tire individual information on aircraft tires and wheel individual information on wheels. The acquisition device sends the tire individual information acquired in the tire manufacturer to the management device, sends the tire individual information and the wheel individual information on each aircraft tire fitted on the corresponding wheel acquired in the MRO-providing company to the management device, and sends the wheel individual information acquired in the airline to the management device. The management device links the tire individual information with the wheel individual information, and outputs tire management information including at least tire identification information, location information, and date and time information.
    Type: Application
    Filed: July 24, 2018
    Publication date: November 19, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Makoto ISHIYAMA, Takumi KAKARA, Daisuke HOTTA