Kurita Water Industries patented a conductive aqueous solution production device that ensures stable concentration and excellent performance in response to concentration changes. The device includes an ion exchange device, supply pipe, and conductivity-imparting substance supply device. The patent claims specify the configuration and components required for optimal operation. GlobalData’s report on Kurita Water Industries gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Kurita Water Industries, Reverse osmosis and nano-filtration was a key innovation area identified from patents. Kurita Water Industries's grant share as of January 2024 was 20%. Grant share is based on the ratio of number of grants to total number of patents.

Conductive aqueous solution production device with stable concentration

Source: United States Patent and Trademark Office (USPTO). Credit: Kurita Water Industries Ltd

The granted patent (Publication Number: US11834638B2) discloses a conductive aqueous solution production device designed to efficiently produce a conductive aqueous solution. The device comprises a main pipe with an ion exchange device for circulating raw water, a branch pipe downstream of the ion exchange device, a supply pipe merging into the main pipe, a preliminary dilution storage tank connected to the branch pipe and supply pipe, and a conductivity-imparting substance supply device adding ammonia to the treated water in the tank. The ammonia generates cations, imparting conductivity to the water. The ion exchange device is filled with a cation exchanger, and the distance between the outlet of the device and the junction point in the main pipe is limited to 5m. The raw water supplied to the device is pure or ultrapure water with a metal ion concentration of 10 ng/L or less, resulting in a low metal ion concentration of 1 ng/L or less in the conductive aqueous solution downstream of the junction point.

This innovative device offers a practical solution for producing a high-quality conductive aqueous solution with minimal metal ion contamination. By utilizing ammonia as the conductivity-imparting substance and ensuring a short separation distance between the ion exchange device and the junction point, the device effectively maintains low metal ion concentrations in the final product. The use of pure or ultrapure water as the raw material further enhances the quality of the conductive aqueous solution. Overall, this patented technology presents a reliable and efficient method for generating a conductive aqueous solution suitable for various industrial applications.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.