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    METHOD FOR SUPPRESSING MICROORGANISM CONTAMINATION IN WATER SYSTEM
    1.
    发明公开
    METHOD FOR SUPPRESSING MICROORGANISM CONTAMINATION IN WATER SYSTEM 审中-公开

    公开(公告)号：EP4455096A1

    公开(公告)日：2024-10-30

    申请号：EP22911059.8

    申请日：2022-12-15

    申请人： Kurita Water Industries Ltd.

    发明人： OHTSUKA, Yuta ,  TAKAHASHI, Junichi ,  HAYAKAWA, Kunihiro

    IPC分类号： C02F1/50 ,  C02F1/76

    摘要： Provided is a method for suppressing microorganism contamination in a water system that contains a reducing agent, the method being characterized in that a stabilized chlorine-based oxidizing agent comprising a chlorine-based oxidizing agent and a sulfamic acid compound, and/or a stabilized bromine-based oxidizing agent comprising a bromine-based oxidizing agent and a sulfamic acid compound is intermittently added to the water system so that the ratio of the time when the stabilized chlorine-based oxidizing agent and/or stabilized bromine-based oxidizing agent is not being added relative to the time when the same is being added of is 0.1 or more.

    METHOD OF PRODUCING A STABILIZED AQUEOUS CHLORINE DIOXIDE SOLUTION
    8.
    发明公开
    METHOD OF PRODUCING A STABILIZED AQUEOUS CHLORINE DIOXIDE SOLUTION 审中-公开

    公开(公告)号：EP4206122A1

    公开(公告)日：2023-07-05

    申请号：EP21862175.3

    申请日：2021-06-16

    申请人： Nexigreen Solutions Ltd

    发明人： VELKOVICH, Mikhail Abramovich ,  SHMATKOV, Aleksandr Alekseevich ,  RUCHYEV, Andrei Andreevich ,  SHMATKOVA, Emiliya Borisovna

    IPC分类号： C01B11/02 ,  C02F1/76 ,  A61L2/18 ,  A01N59/00

    摘要： The invention relates to the chemical industry and can be used in the production of an aqueous chlorine dioxide solution for disinfection, water purification, sterilization and bleaching. To produce a stabilized aqueous chlorine dioxide solution, in the first step two aqueous solutions, (A) and (B), are prepared. To prepare the first solution (A), metallic or ammonium chloride (Al), metallic or ammonium carbonate (A2) and metallic or ammonium bicarbonate (A3) are dissolved in water. The mass ratio of (B1) to (A2+A3) is (2.4-3.0):1. To prepare the second solution (B). metallic or ammonium persulfate (B1) and metallic or ammonium bisulfate (B2) are dissolved in water. The mass ratio of (B1) to (B2) is 3:1. In the second step, solution (B) is added to solution (A). The invention provides maximum production of the end product (aqueous chlorine dioxide solution) that does not have destabilizing side products and can be stored at a temperature of up to 30°C and at normal atmospheric pressure for at least 12 months.