Polymeric Stabilizers for Peroxyacid Solution Stability

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Solution Overview

Problem

Existing peroxyacid solutions face instability issues due to the introduction of impurities during manufacturing, packaging, and transportation, which can lead to decomposition, affecting their efficacy and safety, especially during storage and use.

Innovation Solution

The use of polymeric stabilizers such as phosphino polycarboxylic acids and polymers with specific molecular weights, derived from specific monomer units, is introduced to enhance the stability of peroxyacid solutions against metal attack and decomposition, allowing for their use in food and oil field applications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If conventional stabilizers are used in peracid solutions, then stability during storage is improved, but the solutions remain vulnerable to decomposition from metal ions introduced during manufacturing, packaging, and transportation

Engineering Contradiction:

Improvestability of peracid solutionVSAvoidresistance to metal ion decomposition

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent introduces polymeric stabilizers as intermediary substances that mediate between metal ions and peracid molecules. These polymers contain multiple binding sites that sequester metal ions, preventing them from catalyzing peracid decomposition while maintaining solution stability during storage and use.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention employs composite stabilizer systems combining polymeric stabilizers with traditional stabilizers like phosphonates and dipicolinic acid. This composite approach creates a multi-layered protection mechanism where different stabilizers work synergistically to address various decomposition pathways, enhancing overall reliability against metal ion attack.

Inventive Principle:

Principle #40Composite materials

2Stability of the object's composition

If impurities are avoided during manufacture, then stability is improved, but it is virtually impossible to ensure no such impurities are present

Engineering Contradiction:

Improvestability of peracid solutionVSAvoidmanufacturing complexity

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by incorporating stabilizers into the peracid solution during the manufacturing process itself, rather than attempting to prevent all impurity introduction. This proactive approach ensures stabilizers are present before metal ions can cause decomposition, making the manufacturing process more feasible while maintaining stability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention converts the unavoidable presence of metal ion impurities into a controlled interaction by introducing stabilizers that selectively bind these ions. Rather than trying to eliminate metal ions completely, the system harnesses their presence by directing their interaction toward stabilizer complexes rather than peracid decomposition, turning a harmful factor into a manageable condition.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Stability of the object's composition

If stabilizers are added to enhance stability, then decomposition is reduced, but the hazardous properties of the solution may increase

Engineering Contradiction:

Improvestability of peracid solutionVSAvoidhazardous properties of solution

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The patent utilizes parameter changes by selecting stabilizers with specific molecular weights, functional group compositions, and charge characteristics. These parameter optimizations ensure stabilizers effectively bind metal ions while maintaining solution safety. The polymeric structure and specific functional groups are chosen to maximize stabilization efficiency while minimizing any potential increase in hazardous properties.

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 stabilization of peroxyacid solutions with polymeric stabilizers improves their long-term stability, maintains their effectiveness, and reduces hazardous properties, enabling their safe use in various applications, including food and oil field applications.

Implementation Method 1

The stability of peroxyacid solutions can be improved by the avoidance of the introduction into the solution during its manufacture of impurities which can destabilize the peracid, notably transition metal ions... stabilized against decomposition by such impurities

Methodology Applied

Scientific EffectChelation:

Data Source

PatentUS11779013B2Stabilized peroxyacid solutions

Publication Date: 2023.10.10 EVONIK CORPORATION

AI summary

Aqueous solutions of peroxyacids are stabilized by a polymeric stabilizer selected from a phosphino polycarboxylic acid, a poly(acrylic acid)-acrylamidoalkylpropane sulfonic acid co-polymer, or a poly(acrylic acid)-acrylamidoalkylpropane sulfonic acid-sulfonated styrene terpolymer. The polymer-stabilized peroxyacid solutions have applications in aseptic sterilization and disinfecting of surfaces.