Aqueous Chlorine Dioxide Stabilization via pH and Inhibitor

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Solution Overview

Problem

Chlorine dioxide solutions are unstable at room temperature, leading to decomposition and loss of disinfecting power over time, which limits their storage and distribution duration.

Innovation Solution

A composition of long-term constant-concentration aqueous chlorine dioxide solution is developed, incorporating a decomposition inhibitor and a pH modifier to stabilize chlorine dioxide, maintaining its concentration for extended periods by achieving chemical equilibrium and preventing side reactions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If chlorine dioxide solution is stored at room temperature, then it is convenient for storage and distribution, but the concentration decreases due to decomposition

Engineering Contradiction:

Improvestorage convenienceVSAvoidconcentration stability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

A stabilizer is introduced as an intermediary substance that mediates between chlorine dioxide and the aqueous environment, preventing direct decomposition reactions while allowing the solution to remain stable at room temperature without requiring special storage conditions

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The pH of the solution is modified to create an optimal stable range (pH 2-6) where chlorine dioxide decomposition is minimized. By controlling this critical parameter, the solution maintains its concentration stability under normal storage conditions

Inventive Principle:

Principle #35Parameter changes

2Duration of action of stationary object

If chlorine dioxide solution is stored for long periods, then distribution time is extended, but decomposition increases and disinfecting power is lost

Engineering Contradiction:

Improvestorage durationVSAvoiddisinfecting power

Core Design Contradiction:

Duration of action of stationary objectVSReliability

Solution Approach 1:

A stabilizer is added in advance to preemptively counteract decomposition reactions before they can significantly reduce the chlorine dioxide concentration, thereby preserving disinfecting power throughout the intended storage and distribution period

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The solution pH is adjusted and maintained within the optimal range of pH 2-6, which kinetically suppresses decomposition pathways and allows the solution to retain its effective concentration for extended periods without refrigeration

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution effectively retains chlorine dioxide concentration for 6 months or more, with up to 98% stability after one year, enhancing its usability for various applications by inhibiting decomposition and maintaining effective sterilization capabilities.

Implementation Method 1

a decomposition inhibitor for dissolved chlorine dioxide

Methodology Applied

Scientific EffectDecomposition inhibition: Preservative

Implementation Method 2

a pH modifier

Methodology Applied

Scientific EffectpH modification: Chemical Bonding

Data Source

PatentUS10881111B1Composition for providing room temperature long-term constant-concentration chlorine dioxide solution in aqueous medium and preparation method thereof

Publication Date: 2021.01.05 NEOCL CO LTD

AI summary

The present invention provides a composition of long-term constant-concentration aqueous chlorine dioxide solution including dissolved chlorine dioxide, a decomposition inhibitor for dissolved chlorine dioxide, and a pH modifier, and a method for preparing the same.