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1.发明申请公开(公告)号：US20250099916A1
公开(公告)日：2025-03-27
申请号：US18715096
申请日：2022-12-08
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Yuta OHTSUKA , Junichi TAKAHASHI , Kunihiro HAYAKAWA
Abstract: A silica fouling inhibition method for a reverse osmosis membrane system is provided, in which an acrylic acid-based polymer and/or a maleic acid-based polymer; and a combined chlorine-based oxidizing agent and/or a combined bromine-based oxidizing agent are allowed to be present in water to be treated. A silica fouling inhibitor for a reverse osmosis membrane system is provided, the silica fouling inhibitor includes: a copolymer of acrylic acid and 2-acrylamide-2-methylpropanesulfonic acid and/or a terpolymer of acrylic acid, acrylamide methylpropanesulfonic acid, and N-substituted acrylamide; and a combined chlorine-based oxidizing agent and/or a combined bromine-based oxidizing agent.
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公开(公告)号：US20250051203A1
公开(公告)日：2025-02-13
申请号：US18721662
申请日：2022-12-15
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Yuta OHTSUKA , Chikako SHIMPO , Gou NAKAGAWA , Junichi TAKAHASHI , Kunihiro HAYAKAWA
Abstract: A method for preventing microorganism fouling in a water system containing a reducing agent, said microorganism fouling prevention method for a water system being characterized by adding a stabilized chlorine-based oxidizing agent composed of a chlorine-based oxidizing agent and a sulfamic acid compound, with the ratio of the sulfamic acid compound relative to 1 mol effective chlorine of the chlorine-based oxidizing agent being 1-1.5 mol, and/or a stabilized bromine-based oxidizing agent composed of a bromine-based oxidizing agent and a sulfamic acid compound, with the ratio of the sulfamic acid compound relative to 1 mol effective chlorine conversion amount of the bromine-based oxidizing agent being 1-1.5 mol, to the water system, such that the addition concentration of the stabilized chlorine-based oxidizing agent and/or the stabilized bromine-based oxidizing agent relative to the reducing agent concentration in the water system is 2.5 times or more by molar ratio.
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公开(公告)号：US20240067539A1
公开(公告)日：2024-02-29
申请号：US18013901
申请日：2021-09-02
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Kazuki ISHII , Kunihiro HAYAKAWA , Junichi TAKAHASHI
IPC: C02F1/44
CPC classification number: C02F1/441 , C02F2303/22
Abstract: The present invention is a method for operating a demineralization apparatus provided with a plurality of demineralizing lines arranged in parallel and having demineralizers, the method comprising passing through some of the demineralizing lines water to be treated to produce demineralized water while passing through another demineralizing line(s) dilute water from a dilute water tank to perform washing of the line(s), and returning water used for said washing back to the dilute water tank, and being characterized by, when the water quality of the dilute water is on the high salts concentration side past a predefined value, discharging part of the dilute water so as to let said part join the water to be treated and providing a new supply of dilute water for replenishment.
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4.发明申请HARDNESS-MEASURING COMPOSITION, HARDNESS-MEASURING REAGENT KIT, HARDNESS MEASUREMENT METHOD, AND FOULING PREVENTION METHOD FOR HARDNESS-MEASURING DEVICE 审中-公开硬度测量组合物，硬度测量试剂盒，硬度测量方法和硬度测量装置的预防方法公开(公告)号：US20160377586A1
公开(公告)日：2016-12-29
申请号：US15103073
申请日：2015-02-10
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Junichi TAKAHASHI
Abstract: Provided is a hardness-measuring composition that is used for prevention of measurement error of the measurement unit of a water hardness-measuring device by deposition of the staining components contained in sample water.The hardness-measuring composition comprises a colorant containing Eriochrome Black T and/or Calmagite and a sulfate ester-type anionic surfactant.
Abstract translation: 硬度测量组合物包含含有Eriochrome Black T和/或Calmagite和硫酸酯型阴离子表面活性剂的着色剂。
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公开(公告)号：US20160377583A1
公开(公告)日：2016-12-29
申请号：US15038813
申请日：2015-02-10
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Junichi TAKAHASHI
CPC classification number: G01N31/22 , G01N21/15 , G01N21/78 , G01N31/224 , G01N33/182
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.
Abstract translation: 提供了包含芳族磺酸基聚合物或其盐的氯浓度测量组合物; 一种氯浓度测量组合物，其包含组分（a）用于检测残余氯的着色剂和组分（b）芳族磺酸基聚合物或其盐; 包括使用所述组合物的氯浓度测量方法; 以及通过使用包含芳香族磺酸类聚合物或其盐的氯浓度测定组合物来减少或防止染色的方法。
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Patent Agency Ranking
6.发明申请公开(公告)号：US20160320309A1
公开(公告)日：2016-11-03
申请号：US15206822
申请日：2016-07-11
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Junichi TAKAHASHI
IPC: G01N21/80
Abstract: In measuring a dissolved substance, a concentration of a specific dissolved substance in a sample water is measured using a measuring water W1 developing a specific color within a specific pH range by adding each of two reagents to a sample water W0, and an acid-base indicator S developing different colors other than the specific color is selected in a first pH range including the specific pH range and a second pH range deviating from the first pH range. Next, a reagent is prepared by adding the acid-base indicator to one reagent wherein a pH value of a reagent added water where the two kinds of reagents are separately added to the sample water is within the second pH range. Next, absorbance values are calculated by three region component lights which are a transmitted light in the measuring water wherein the prepared reagent is added.
Abstract translation: 在测定溶解物质时，使用在特定pH范围内形成特定颜色的测定水W1，将样品水中的特定溶解物的浓度加入到样品水W0中，并将酸基 在包括特定pH范围和偏离第一pH范围的第二pH范围的第一pH范围内选择在特定颜色以外发展不同颜色的指示剂S. 接下来，通过将酸碱指示剂添加到一个试剂中来制备试剂，其中将两种试剂分别添加到样品水中的试剂添加水的pH值在第二pH范围内。 接下来，通过添加了所制备的试剂的测量水中的透射光的三个区域分量光来计算吸光度值。
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7.发明申请公开(公告)号：US20150316486A1
公开(公告)日：2015-11-05
申请号：US14440523
申请日：2013-10-17
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Junichi TAKAHASHI
IPC: G01N21/80
Abstract: In measuring a dissolved substance, a concentration of a specific dissolved substance in a sample water is measured using a measuring water W1 developing a specific color within a specific pH range by adding each of two reagents to a sample water W0, and an acid-base indicator S developing different colors other than a specific color is selected in a first pH range including the specific pH range and a second pH range deviating from the first pH range. Next, a reagent is prepared by adding the acid-base indicator to one reagent wherein a pH value of a reagent added water where the two kinds of reagents are separately added to the sample water is within the second pH range. Next, absorbance values are calculated by three region component lights which are a transmitted light in the measuring water where the prepared reagent is added.
Abstract translation: 在测定溶解物质时，使用在特定pH范围内形成特定颜色的测定水W1，将样品水中的特定溶解物的浓度加入到样品水W0中，并将酸基 在包括特定pH范围和偏离第一pH范围的第二pH范围的第一pH范围内选择在特定颜色以外发展不同颜色的指示剂S. 接下来，通过将酸碱指示剂添加到一个试剂中来制备试剂，其中将两种试剂分别添加到样品水中的试剂添加水的pH值在第二pH范围内。 接下来，通过添加了所制备的试剂的测量水中的透射光的三个区域分量光来计算吸光度值。
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8.发明公开公开(公告)号：US20240083779A1
公开(公告)日：2024-03-14
申请号：US18273027
申请日：2022-02-24
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Koji Nakata , Junichi TAKAHASHI
CPC classification number: C02F1/441 , C02F1/50 , C02F2303/20 , C02F2305/02
Abstract: A method for operating a reverse osmosis membrane device, a slime control method that is applied to a reverse osmosis membrane device, and a water treatment device are provided. The method comprises: a first step for intermittently adding an oxidation-based slime inhibitor and intermittently supplying water to be treated containing the oxidation-based slime inhibitor to a reverse osmosis membrane device; and a second step for adding an organic-based slime inhibitor at least during a period other than the addition period of the first step and supplying the water to be treated containing the organic-based slime inhibitor to the reverse osmosis membrane device.
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公开(公告)号：US20200173739A1
公开(公告)日：2020-06-04
申请号：US16640607
申请日：2018-11-21
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Shogo UJIIE , Junichi TAKAHASHI , Eishi SHIMMURA
Abstract: A method to condense and liquefy vapor by introducing the vapor into a heat exchanger and bringing same into contact with a cooling body in the heat exchanger, wherein a droplet condensation promoting agent is directly added to the vapor introduced into the heat exchanger or to the heat exchanger. A droplet condensation promoting effect due to the droplet condensation promoting agent can be sufficiently manifested and condensation efficiency by droplet condensation can be improved by way of directly adding the droplet condensation promoting agent such as a film forming amine or the like to the vapor introduced into the heat exchanger or to the heat exchanger.
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公开(公告)号：US20150362436A1
公开(公告)日：2015-12-17
申请号：US14764817
申请日：2014-02-13
Applicant: KURITA WATER INDUSTRIES LTD.
Inventor： Yoshitaka KISHINE , Toshikazu TAKAHASHI , Junichi TAKAHASHI
Abstract: A reagent includes a coloring agent allowing a measured solution to develop a color transmitting a region component light for a dissolved-substance concentration measurement selected from three region component lights of red, green, and blue obtained by transmitting a light including a visible light region to the measured solution colored by addition of the reagent to the sample, and dividing a light of the visible light region of a transmitted light thereof into roughly three portions. Based on the transmitted light from the measured solution with the coloring agent added, an absorbance of the region component light for the dissolved-substance concentration measurement, and an absorbance A3 of another region component light resulted only from the coloring agent are calculated. Whether or not the reagent in a necessary quantity is added to the sample can be judged by comparing the absorbance A3 and a standard absorbance A0.
Abstract translation: 试剂包括着色剂，其允许测量溶液形成透射区域成分光的颜色，用于溶解物质浓度测量，所述溶解物质浓度测量选自通过将包括可见光区域的光透射到的红色，绿色和蓝色的三个区域分量光， 测定的溶液通过向样品中添加试剂而着色，并将透射光的可见光区域的光分成大致三部分。 基于添加有着色剂的测定溶液的透射光，计算溶解物浓度测定中的区域成分光的吸光度和仅由着色剂得到的另一区域成分光的吸光度A3。 可以通过比较吸光度A3和标准吸光度A0来判断所需量的试剂是否添加到样品中。
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