The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2023
Filed:
Mar. 09, 2017
Kurita Water Industries Ltd., Tokyo, JP;
Yuuichi Ogawa, Tokyo, JP;
KURITA WATER INDUSTRIES LTD., Tokyo, JP;
Abstract
A conductive aqueous solution production devicehas an ion exchange devicemounted on the way of the main pipesupplying ultrapure water W as raw water, a supply pipewhich joins the main pipeon the downstream side of the ion exchange device, and a conductivity-imparting substance supply device. For example, if the conductivity-imparting substance is ammonia, since the ions are cations, that is, ammonium ions (NH), it is preferable that an ion exchanger which fills the ion exchange devicebe a cation exchange resin. If the conductivity-imparting substance is carbon dioxide, the ions are anions, that is, bicarbonate ions (HCO) or carbonate ions (CO), and therefore it is preferable that the ion exchange devicebe filled with an anion exchange resin. Such a conductive aqueous solution production device is capable of producing a conductive aqueous solution with a stable concentration, and achieves excellent follow-up performance with respect to a change in concentration.