Lipase-Acylhydrazone Detergent System for Low-Temperature Stain Removal
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Solution Overview
Problem
Conventional bleaching agents based on active oxygen perform poorly at low temperatures, and increasing their concentration can reduce the effectiveness of enzymes like protease and lipase, leading to inadequate removal of protein and fat-containing stains.
Innovation Solution
The combination of lipase with a specific acylhydrazone of the general formula (I) enhances the primary detergency of peroxygen-containing detergents, particularly at low temperatures, by maintaining the cleaning performance of both components and synergistically improving soiling removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the concentration of bleaching agent is increased to improve bleaching performance at low temperatures, then the bleaching performance is improved, but the effectiveness of enzymes such as protease and lipase is reduced
Solution Approach 1:
The invention divides the cleaning system into distinct functional components: a specific lipase (from Humicola lanuginosa) that handles fat-containing stains and an acylhydrazone catalyst that activates oxygen species for other stain types. This segmentation allows each component to operate optimally without interfering with the other, resolving the contradiction between low-temperature bleaching and enzyme effectiveness.
Solution Approach 2:
The acylhydrazone compound acts as an intermediary that activates oxygen species (hydrogen peroxide, peracids) to create reactive oxygen species for stain removal. This intermediary mechanism enables effective low-temperature bleaching without directly exposing enzymes to high concentrations of harsh bleaching agents, thus preserving enzyme activity while achieving bleaching performance.
2Quantity of substance
If the amount of bleach is increased to improve bleaching performance, then the bleaching performance is improved, but the removal of protein and fat-containing stains is reduced
Solution Approach 1:
The cleaning formulation is segmented into specialized components: a specific lipase dedicated to fat-containing stains and an acylhydrazone-based oxygen activation system for other stain types. This segmentation eliminates the need to increase overall bleach concentration, as each component targets specific stain types efficiently, maintaining high productivity without excessive bleach usage.
Solution Approach 2:
The invention changes the chemical parameters of the bleaching system by using acylhydrazone catalysts that activate oxygen species at lower concentrations and temperatures. This parameter change allows effective stain removal with reduced bleach concentration, avoiding the negative impact on enzyme activity and overall cleaning productivity.
3Use of energy by stationary object
If conventional bleaching agents are used at low temperatures, then energy consumption is reduced, but the bleaching performance is limited
Solution Approach 1:
The acylhydrazone compound serves as a mediator that enables oxygen activation at low temperatures. It facilitates the formation of reactive oxygen species from hydrogen peroxide or peracids without requiring high thermal energy input, thus maintaining low energy consumption while significantly improving low-temperature bleaching performance.
Solution Approach 2:
The invention changes the activation parameters of the bleaching system by introducing acylhydrazone catalysts that lower the activation energy barrier for oxygen species generation. This allows effective bleaching to occur at low temperatures, simultaneously reducing energy consumption and improving bleaching performance.
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 combination of lipase and acylhydrazone significantly improves the removal of stains at low temperatures, outperforming the sum of their individual effects, and maintains the cleaning performance of both components, especially at temperatures below 30°C.
Implementation Method 1
A lipase is an enzyme that catalyzes the hydrolysis of ester bonds in lipid substrates, particularly fats and oils.
Implementation Method 2
The international patent application WO 2009/124855 A1 relates to the use of metal complexes with acylhydrazone ligands as catalysts for oxidation reactions
Data Source
AI summary
The problem addressed by the invention is that of boosting the primary washing efficiency of oxygen-containing washing and cleaning agents. This problem is solved by using a combination of lipase and an acyl hydrazone.