Patents by Inventor Katsufumi Oto
Katsufumi Oto 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).
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Patent number: 9387445Abstract: To provide a separation membrane element that is able to increase the amount of permeate fluid per unit time and also able to improve stability performance, provided is a separation membrane element, comprising a separation membrane and a permeate spacer, wherein a separation functional layer is arranged on the surface of said separation membrane and a nonwoven fabric served as a substrate is arranged on the back surface of said separation membrane, wherein said permeate spacer is arranged on the back surface side of said substrate, wherein said permeate spacer is made of a different material from said separation membrane, and a projection area ratio of said permeate spacer to said separation membrane is 0.03 to 0.80.Type: GrantFiled: June 2, 2011Date of Patent: July 12, 2016Assignee: TORAY INDUSTRIES, INC.Inventors: Masahiro Kimura, Katsufumi Oto, Kentarou Takagi, Hiroho Hirozawa, Masakazu Koiwa, Yutaro Suzuki
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Publication number: 20150321148Abstract: A separation membrane including: a separation membrane main body having a feed-side face and a permeate-side face; and a plurality of channel members adhered to the permeate-side face of the separation membrane main body, in which a weight W (g) of the plurality of channel members and a volume V (cm3) of the plurality of channel members, exclusive of portions impregnated into the permeate-side face, satisfy the following relational expression: 1.0?W/V?2.5, and the channel members have a melting temperature of 200° C. or lower as measured with a differential scanning calorimeter.Type: ApplicationFiled: June 28, 2013Publication date: November 12, 2015Inventors: Hiroho Hirozawa, Masakazu Koiwa, Hiroyuki Yamada, Kentaro Takagi, Yoshiki Okamoto, Tsuyoshi Hamada, Katsufumi Oto, Masahiro Kimura
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Publication number: 20150041388Abstract: A separation membrane includes a separation membrane main body that includes a supply-side surface and a filtrate-side surface; and a supply-side channel member disposed on the supply-side surface of the separation membrane main body, wherein when a thickness of the supply-side channel member in a direction perpendicular to a flowing direction of a supplied water that flows on the supply-side surface is a width d of the supply-side channel member, a ratio of height/width (h/d) of the supply-side channel member is 0.7 or greater and 3.0 or less.Type: ApplicationFiled: February 19, 2013Publication date: February 12, 2015Inventors: Hiroho Hirozawa, Masakazu Koiwa, Hiroyuki Yamada, Kentaro Takagi, Yoshiki Okamoto, Tsuyoshi Hamada, Katsufumi Oto, Masahiro Kimura
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Publication number: 20140251896Abstract: A separation membrane, including: a separation membrane main body having at least a base material and a separating functional layer; and a flow path material independently fixed in the thickness direction of the base material, and having a compression elasticity of 0.1-5.0 GPa.Type: ApplicationFiled: September 28, 2012Publication date: September 11, 2014Inventors: Hiroho Hirozawa, Masakazu Koiwa, Kentaro Takagi, Yoshiki Okamoto, Hiroyuki Yamada, Tsuyoshi Hamada, Katsufumi Oto, Masahiro Kimura
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Publication number: 20140231332Abstract: A separation membrane includes a separation membrane sheet at least including a substrate and a separation functional layer, and a flow path member having a composition different from the separation membrane sheet and directly secured to the substrate by an adhesive force of at least 1 N/m on side opposite in thickness direction to the separation functional layer.Type: ApplicationFiled: September 28, 2012Publication date: August 21, 2014Inventors: Hiroho Hirozawa, Masakazu Koiwa, Kentaro Takagi, Yoshiki Okamoto, Hiroyuki Yamada, Tsuyoshi Hamada, Katsufumi Oto, Masahiro Kimura
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Publication number: 20140224726Abstract: To provide a separation membrane element that is able to increase the amount of permeate fluid per unit time and also able to improve stability performance, provided is a separation membrane element, comprising a separation membrane and a permeate spacer, wherein a separation functional layer is arranged on the surface of said separation membrane and a nonwoven fabric served as a substrate is arranged on the back surface of said separation membrane, wherein said permeate spacer is arranged on the back surface side of said substrate, wherein said permeate spacer is made of a different material from said separation membrane, and a projection area ratio of said permeate spacer to said separation membrane is 0.03 to 0.80.Type: ApplicationFiled: June 2, 2011Publication date: August 14, 2014Applicant: TORAY INDUSTRIES, INC.Inventors: Masahiro Kimura, Katsufumi Oto, Kentarou Takagi, Hiroho Hirozawa, Masakazu Koiwa, Yutaro Suzuki
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Patent number: 8631946Abstract: A composite semipermeable membrane comprising a porous support membrane on which a separating functional polyamide layer resulting from the polycondensation reaction of polyfunctional aromatic amines with polyfunctional acid halides is formed, wherein the separating functional polyamide layer has carboxy groups, amino groups, phenolic hydroxyl groups, and azo groups, wherein XA, the ratio of the amino groups (molar equivalent of the amino groups/(molar equivalent of the azo groups+molar equivalent of the phenolic hydroxyl groups+molar equivalent of the amino groups)) on a feed water contact surface of the separating functional polyamide layer (an A surface), is in the range 0.5 or less, and XB, the ratio of the amino groups (molar equivalent of the amino groups/(molar equivalent of the azo groups+molar equivalent of the phenolic hydroxyl groups+molar equivalent of the amino groups)) on a permeate-side surface of the separating functional polyamide layer (a B surface), i.e.Type: GrantFiled: December 16, 2010Date of Patent: January 21, 2014Assignee: Toray Industries, Inc.Inventors: Takao Sasaki, Tomoko Mitsuhata, Kentaro Takagi, Katsufumi Oto
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Publication number: 20130213880Abstract: A separation membrane is provided containing hydrophilic molecules and having, as formed on at least one surface of a feed side and a permeate side thereof, a height difference of from 80 ?m to 2000 ?m, in which a weight of the hydrophilic molecules in a bone-dry separation membrane is from 0.1% to 40% based on a weight of the bone-dry separation membrane from which the weight of the hydrophilic molecules has been subtracted.Type: ApplicationFiled: October 21, 2011Publication date: August 22, 2013Applicant: TORAY INDUSTRIES, INC.Inventors: Hiroho Hirozawa, Masakazu Koiwa, Kentaro Takagi, Yutaro Suzuki, Katsufumi Oto, Masahiro Fimura
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Publication number: 20120248027Abstract: A composite semipermeable membrane comprising a porous support membrane on which a separating functional polyamide layer resulting from the polycondensation reaction of polyfunctional aromatic amines with polyfunctional acid halides is formed, wherein the separating functional polyamide layer has carboxy groups, amino groups, phenolic hydroxyl groups, and azo groups, wherein XA, the ratio of the amino groups (molar equivalent of the amino groups/(molar equivalent of the azo groups+molar equivalent of the phenolic hydroxyl groups+molar equivalent of the amino groups)) on a feed water contact surface of the separating functional polyamide layer (an A surface), is in the range 0.5 or less, and XB, the ratio of the amino groups (molar equivalent of the amino groups/(molar equivalent of the azo groups+molar equivalent of the phenolic hydroxyl groups+molar equivalent of the amino groups)) on a permeate-side surface of the separating functional polyamide layer (a B surface), i.e.Type: ApplicationFiled: December 16, 2010Publication date: October 4, 2012Applicant: TORAY INDUSTRIES, INC.Inventors: Takao Sasaki, Tomoko Mitsuhata, Kentaro Takagi, Katsufumi Oto
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Patent number: 7279097Abstract: A composite semipermeable membrane which satisfies the following relationship when seawater at 25° C. having a pH of 6.5, a boron concentration of 5 ppm and a TDS concentration of 3.5% by weight is permeated under an operation pressure of 5.5 MPa: Boron removal ratio (%)?95?4×membrane permeation flow rate (m3/m2·day).Type: GrantFiled: June 14, 2004Date of Patent: October 9, 2007Assignee: Toray Industries, Inc.Inventors: Hiroki Tomioka, Kazuya Sugita, Katsufumi Oto
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Bactericide for use in water treatment, method for water treatment and apparatus for water treatment
Patent number: 7090780Abstract: A water-treating microbicide, containing an inorganic acid and a corrosion inhibitor, and further containing a carboxylic acid having 8 or less carbon atoms or any of alkali metal salts thereof. The present invention can provide a water-treating microbicide, water treatment method and water treatment apparatus exhibiting a high sterilization effect in a membrane separation device for seawater desalination, etc.Type: GrantFiled: April 2, 2002Date of Patent: August 15, 2006Assignee: Toray Industries, Inc.Inventors: Akihiko Ito, Katsufumi Oto, Kazuya Sugita, Yoshinari Fusaoka -
Publication number: 20060016754Abstract: A water-treating microbicide, containing an inorganic acid and a corrosion inhibitor, and further containing a carboxylic acid having 8 or less carbon atoms or any of alkali metal salts thereof. The present invention can provide a water-treating microbicide, water treatment method and water treatment apparatus exhibiting a high sterilization effect in a membrane separation device for seawater desalination, etc.Type: ApplicationFiled: September 29, 2005Publication date: January 26, 2006Applicant: Toray industries, Inc. a corporation of JapanInventors: Akihiko Ito, Katsufumi Oto, Kazuya Sugita, Yoshinari Fusaoka
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Publication number: 20040256309Abstract: A composite semipermeable membrane which satisfies the following relationship when seawater at 25° C. having a pH of 6.5, a boron concentration of 5 ppm and a TDS concentration of 3.5% by weight is permeated under an operation pressure of 5.5 MPa: Boron removal ratio (%)≧95−4×membrane permeation flow rate (m3/m2·day).Type: ApplicationFiled: June 14, 2004Publication date: December 23, 2004Applicant: TORAY INDUSTRIES, INC.Inventors: Hiroki Tomioka, Kazuya Sugita, Katsufumi Oto
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Bactericide for use in water treatment, method for water treatment and apparatus for water treatment
Publication number: 20040050800Abstract: A water-treating microbicide, containing an inorganic acid and a corrosion inhibitor, and further containing a carboxylic acid having 8 or less carbon atoms or any of alkali metal salts thereof. The present invention can provide a water-treating microbicide, water treatment method and water treatment apparatus exhibiting a high sterilization effect in a membrane separation device for seawater desalination, etc.Type: ApplicationFiled: May 23, 2003Publication date: March 18, 2004Inventors: Akihiko Ito, Katsufumi Oto, Kazuya Sugita, Yoshinari Fusaoka -
Patent number: 4634531Abstract: The present invention relates to the membrane treatment method for semipermeable membranes, that is, a method wherein it is characterized that not only remarkable improving effect of selective separation performance of semipermeable membranes is obtained but also durability of said improving effect for selective separation performance is improved by means of extremely simple and easy procedures such as said semipermeable membranes are successively brought into contact with very dilute of aqueous solutions including effective substances which are individually water-soluble in due order and for a short time, where said effective water-soluble substances form water-insoluble or very little water-soluble materials thereof fixed on the surface of said semipermeable membranes.Type: GrantFiled: February 12, 1985Date of Patent: January 6, 1987Assignee: Toray Industries, Inc.Inventors: Yukio Nakagawa, Katsufumi Oto, Masaru Kurihara