Title:
AQUEOUS CHLORINE DIOXIDE SOLUTION AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2020/067033
Kind Code:
A9
Abstract:
This aqueous chlorine dioxide solution contains chlorine dioxide, a potassium salt of a weak acid having a pKa of 2.5 or more, and a chlorite, while having a pH of from 4.0 to 7.5 (inclusive). A method for producing an aqueous chlorine dioxide solution according to the present invention comprises: a first step for preparing a first aqueous solution that contains chlorine dioxide; a second step for preparing an intermediate aqueous solution having a pH of from 4.0 to 7.5 (inclusive) by mixing the first aqueous solution with a second aqueous solution that contains a potassium salt of a weak acid having a pKa of 2.5 or more; and a third step for preparing an aqueous chlorine dioxide solution having a pH of from 4.0 to 7.5 (inclusive) by mixing the intermediate aqueous solution with a third aqueous solution that contains chlorite, or alternatively by mixing the intermediate aqueous solution with the third aqueous solution and subsequently adding the second aqueous solution thereto. Consequently, the present invention provides: an aqueous chlorine dioxide solution wherein the concentration of chlorine dioxide is stably maintained without using a phosphate or a salt thereof as a pH adjusting agent; and a method for producing this aqueous chlorine dioxide solution.
Inventors:
FUJITA HIROMASA (JP)
FUJITA TETSUHIRO (JP)
FUJITA MASASHI (JP)
TAKATOMI HIROSHI (JP)
FUJITA TETSUHIRO (JP)
FUJITA MASASHI (JP)
TAKATOMI HIROSHI (JP)
Application Number:
PCT/JP2019/037311
Publication Date:
February 25, 2021
Filing Date:
September 24, 2019
Export Citation:
Assignee:
AMATERA INC (JP)
International Classes:
C01B11/02; A61L9/01
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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