Cationic Bleach Activator for Low-Temperature Washing Performance
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Solution Overview
Problem
Existing bleach activators lose effectiveness at low temperatures, limiting the energy-saving potential of washing and bleaching processes below 60°C.
Innovation Solution
Compounds that form organic peroxoacids with a cationic group under perhydrolysis conditions, specifically those containing a quaternary N atom in a heterocyclic 6-membered functional group, are used to enhance the bleaching effect of washing and cleaning agents, allowing for effective bleaching at temperatures as low as 20°C to 40°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional bleach activators are used, then effective bleaching is achieved at high temperatures (above 80°C), but the oxidizing effect diminishes significantly at low temperatures (below 60°C)
Solution Approach 1:
The patent modifies the molecular structure of bleach activators by introducing a quaternary ammonium group within a heterocyclic 6-membered ring. This structural parameter change enables the activator to maintain its ability to form peroxycarboxylic acids at low temperatures, thereby preserving bleaching effectiveness below 60°C while conventional activators fail
Solution Approach 2:
The invention creates a composite molecular structure combining a quaternary ammonium cation with a heterocyclic 6-membered ring system and perhydrolysis-active groups. This composite structure integrates the benefits of low-temperature stability from the quaternary ammonium moiety with the perhydrolysis reactivity of conventional activators, achieving effective bleaching across a broader temperature range
2Reliability
If high temperatures (above 80°C) are used for bleaching, then sufficient oxidizing effect is achieved, but energy consumption increases
Solution Approach 1:
By changing the chemical parameters of the bleach activator to include a quaternary ammonium group in a heterocyclic structure, the patent enables perhydrolysis reactions to proceed efficiently at lower temperatures (20-40°C). This parameter modification allows achieving the same oxidizing effect at 40°C with the new activator as would require 95°C with conventional activators, thereby reducing energy consumption by approximately 55°C temperature differential
3Use of energy by moving object
If washing temperature is reduced below 60°C for energy saving, then energy consumption decreases, but the effectiveness of conventional bleach activators diminishes noticeably
Solution Approach 1:
The patent changes the chemical parameters of the activator molecule by incorporating a quaternary ammonium group within a heterocyclic 6-membered ring. This structural modification fundamentally alters the temperature-dependence profile of the perhydrolysis reaction, enabling it to maintain high effectiveness at low temperatures (20-40°C) where conventional activators show noticeable performance degradation
Solution Approach 2:
The quaternary ammonium group acts as an intermediary structural element that mediates between the temperature requirements for energy efficiency and the chemical reactivity requirements for effective bleaching. This intermediary structure enables the perhydrolysis reaction to proceed at low temperatures by stabilizing the transition state or intermediate species, thereby decoupling the temperature-energy relationship from the bleaching effectiveness
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
These compounds significantly enhance the bleaching performance of washing and cleaning agents at low temperatures, maintaining strong oxidizing effects and improving stain removal efficiency even at cold water temperatures.
Implementation Method 1
compounds which form, under perhydrolysis conditions, organic peroxoacids having a cationic group
Implementation Method 2
The oxidizing effect of these substances depends greatly on temperature in dilute solutions
Data Source
AI summary
The present invention relates to compounds which form, under perhydrolysis conditions, certain cationic organic peracids, to the use of said compounds for activating peroxygen compounds in the context of bleaching stains when washing textiles and cleaning hard surfaces, and to washing and cleaning agents that contain said compounds.