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公开(公告)号：US20210339205A1
公开(公告)日：2021-11-04
申请号：US17281975
申请日：2019-09-30
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Kazuki ISHII
Abstract: A water treatment chemical for membranes, which contains a polymer compound having a carboxyl group and a sulfo group, preferably a polymer compound represented by formula (1). A membrane treatment method wherein this water treatment chemical for membranes is added to membrane feed water when water to be treated, which contains an organic compound having a phenolic hydroxy group, is subjected to a membrane separation treatment. In the formula, m and n represent molar percentages of respective structural units; (m+n) is 90-100%; and R represents an anionic group containing a sulfo group.
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公开(公告)号：US20210292674A1
公开(公告)日：2021-09-23
申请号：US17266109
申请日：2019-04-11
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Masaki MIYAHARA , Youichi HIRANO , Takashi KIKKAWA
IPC: C10L10/18
Abstract: Provided is an antioxidant capable of coating the surface layer of a coal deposit (coal pile) and further reducing the amount of oxygen permeation into the inside of the deposit. The present invention is an antioxidant for coal, containing an oil-in-water type resin emulsion having an average particle size of emulsion particles of 0.3 μm or more and 1.0 μm or less. The antioxidant preferably further contains a surfactant. The worker sprays the above antioxidant on the coal deposit. This forms a consolidated layer on the surface of the coal deposit that is highly effective in suppressing oxygen permeation. Therefore, the permeation of oxygen in the air atmosphere into the inside of the coal deposit is blocked, thus preventing the oxidation of the coal.
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公开(公告)号：US20200350643A1
公开(公告)日：2020-11-05
申请号：US16332943
申请日：2018-03-29
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Jun KANEKO , Shingo MIYAMOTO , Mitsuru NOZUE
IPC: H01M10/52 , H01M10/0525
Abstract: A lithium ion battery comprises a positive electrode terminal and a negative electrode terminal, a battery case, and an electrode body housed inside the battery case. The electrode body has a positive electrode current collector and a positive-electrode electrode plate and a negative electrode current collector and a negative-electrode electrode plate, and has a structure in which the positive-electrode electrode plate and the negative-electrode electrode plate are laminated via a separator. A carbon-based porous material in a battery case has a methane gas absorption capacity and preferably has a carbon dioxide gas absorption capacity and has a pore volume of 0.3 mL/g or less, for pores having a pore size of 4.5 Å or more. Such a gas absorber for a lithium ion battery generates no gas from reaction with an electrolytic solution of the lithium ion battery and can suitably absorb methane gas generated at the time of abnormality.
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公开(公告)号：US20200290873A1
公开(公告)日：2020-09-17
申请号：US16341610
申请日：2017-09-19
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Ikunori YOKOI , Yoshiaki IDE
IPC: C01B15/013 , B01D61/02 , B01D69/02 , C02F1/44 , C02F1/42 , B01J39/05 , B01J39/20 , B01J41/05 , B01J41/14 , B01J47/028 , C08F212/08
Abstract: A purification method for an aqueous hydrogen peroxide solution includes subjecting the aqueous hydrogen peroxide solution to a reverse osmosis membrane separation treatment with a high-pressure reverse osmosis membrane separation device. The high-pressure reverse osmosis membrane has a denser skin layer on the membrane surface and is therefore lower in an amount of membrane permeate water per unit operating pressure but higher in the rejection rate of TOC and boron, as compared with a low-pressure or ultralow-pressure reverse osmosis membrane. The high-pressure reverse osmosis membrane permeate water is preferably further subjected to an ion exchange treatment with an ion exchange device including two or more columns packed with gel-type strong ion exchange resins.
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公开(公告)号：US10765115B2
公开(公告)日：2020-09-08
申请号：US15773623
申请日：2016-03-28
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Takashi Iyasu , Yasushi Murano , Toshimasa Kato
Abstract: The present invention provides a method for suppressing a decrease in the concentration of an isothiazoline compound, wherein even if an addition concentration of the isothiazoline compound used as an antibacterial agent is low in a water system, the decrease in the concentration thereof can be suppressed so that the residual rate thereof after 24 hours can be raised. The method is carried out in a manner wherein to a water system, an isothiazoline compound is fed with an addition concentration of 0.2 mg/L or more and less than 1 mg/L, and a combined chlorine agent consisting of a chlorine stabilizer and a chlorine-based oxidant is added so as to maintain a concentration thereof at 0.3 mg/L as Cl2 or more and 6 mg/L as Cl2 or less therein.
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Patent Agency Ranking
86.发明授权公开(公告)号：US10737221B2
公开(公告)日：2020-08-11
申请号：US16071791
申请日：2016-09-12
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Kazuki Ishii
Abstract: Provided is a scale inhibitor for RO membranes which effectively inhibits the precipitation of calcium carbonate in an RO membrane treatment without increasing the phosphorus concentration in effluent and which can be used even in the RO membrane treatment of feed in which high-M-alkalinity concentrate having a calcium hardness level of 100 to 600 mg/L-CaCO3 and an M alkalinity of 1000 to 16000 mg-CaCO3/L is produced. A scale inhibitor for reverse osmosis membranes which inhibits the formation of calcium carbonate scale in an RO membrane treatment, the scale inhibitor including components (A) and (B) below. An RO membrane treatment method including adding the scale inhibitor for RO membranes to RO feed. Component (A): Terpolymer of maleic acid, an acrylic acid alkyl ester, and vinyl acetate, Component (B): Homopolymer of carboxylic acid
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公开(公告)号：US10585079B2
公开(公告)日：2020-03-10
申请号：US15038813
申请日：2015-02-10
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Junichi Takahashi
Abstract: An object of the present technology is to provide a chlorine-concentration-measuring composition that can reduce staining by reagents, a measurement method using the chlorine-concentration-measuring composition and a method for reducing staining by chlorine-concentration-measuring composition using an aromatic sulfonic acid-based polymer or the salt thereof.Provided are a chlorine-concentration-measuring composition comprising an aromatic sulfonic acid-based polymer or the salt thereof; a chlorine-concentration-measuring composition comprising component (a) a color reagent for detection of residual chlorine and component (b) an aromatic sulfonic acid-based polymer or the salt thereof; a chlorine-concentration-measuring method comprising using the composition; and a method for reducing or preventing staining by using the chlorine-concentration-measuring composition comprising an aromatic sulfonic acid-based polymer or the salt thereof.
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公开(公告)号：US10583405B2
公开(公告)日：2020-03-10
申请号：US16077310
申请日：2017-03-03
Inventor： Takahiro Kawakatsu , Hideto Matsuyama , Daisuke Saeki , Toru Takai
IPC: B01D69/12 , B01D71/06 , C02F1/44 , B01D71/74 , B01D67/00 , B01D69/10 , B01D69/14 , B01D61/00 , B01D61/02 , C02F103/08
Abstract: The present invention provides a RO membrane or a FO membrane comprising a coating layer made of a phospholipid bilayer membrane and formed on a surface of a porous membrane body, having a high water permeate flow rate and salt rejection performance, the membrane being a permselective membrane comprising a porous membrane having a pore size of 5 nm to 50 nm and a coating layer made of a phospholipid bilayer and formed on a surface of the porous membrane, wherein (i) the phospholipid bilayer comprises phospholipid, amphotericin B, and ergosterol; (ii) a content of the amphotericin B is 3 to 20 mol % based on the phospholipid bilayer; (iii) a total content of the ergosterol and the amphotericin B in the phospholipid bilayer is 10 to 30 mol %.
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公开(公告)号：US10550026B2
公开(公告)日：2020-02-04
申请号：US15119234
申请日：2015-02-10
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Shuhei Izawa
IPC: C02F9/00 , C02F1/52 , C02F1/72 , C02F101/16 , C02F1/02 , C02F1/66 , C02F1/74 , C02F101/20 , C02F103/16 , C02F1/56
Abstract: A method for treating ammonia-containing water containing ammonia, metal ions that form a complex with ammonia, and a reducing substance includes a first step of oxidizing the reducing substance by adding hydrogen peroxide to the ammonia-containing water; a second step of aerating the resultant water treated in the first step to remove the ammonia; a third step of forming an insoluble solid at a pH of 7 to 12 by adding at least one compound selected from the group consisting of iron salts, aluminum salts, calcium salts, and calcium hydroxide to the water treated in the second step; and a fourth step of separating the insoluble solid formed in the third step by solid-liquid separation.
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公开(公告)号：US20200024154A1
公开(公告)日：2020-01-23
申请号：US16494019
申请日：2017-09-11
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Yoshimasa NAKANO
Abstract: When the water quality of effluent water H or intermediate water A or B is measured, the effluent water H or the intermediate water B or A is allowed to flow from a pipe 40, 50, or 60 to a measurement column 84 via pipes 37, 80, 83, and the water quality is measured by a sensor 85. When the water quality of raw water R is measured, the effluent water H and raw water R are introduced from pipes 40, 70, mixed in a line mixer 38, and allowed to flow into the measurement column 84 via the pipe 80, a three-way valve 81, and the pipe 83, and the water quality is measured by a sensor 85.
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