Manganese Catalyst Granule for Homogeneous Dosing

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Solution Overview

Problem

Existing bleaching detergent formulations face challenges in achieving accurate dosing and homogeneous distribution of manganese catalysts, leading to issues with bleaching performance due to heterogeneous distribution, which can result in underdosing or excessive hydrogen peroxide decomposition and storage instability of bleaching catalysts.

Innovation Solution

A composition comprising a water-soluble polymer, an absorbent, and a water-soluble mononuclear or dinuclear Mn(III) and/or Mn(IV) complex bleaching catalyst, where the catalyst is incorporated in a non-crystalline or nanocrystalline form, enhancing storage stability and bleaching activity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If small amounts of manganese catalyst are used to achieve effective bleaching, then bleaching efficiency is improved, but homogeneous distribution throughout the formulation becomes difficult to achieve

Engineering Contradiction:

Improvebleaching efficiencyVSAvoiddosing accuracy and distribution homogeneity

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent uses a composite granule system comprising a manganese catalyst core surrounded by a coating layer containing binding agents and inert materials. This composite structure allows precise dosing of small catalyst amounts while ensuring homogeneous distribution through the granule matrix, resolving the contradiction between high efficiency and distribution homogeneity

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent applies a coating layer (shell) around the catalyst core containing binding agents such as polyvinyl alcohol, starch, or cellulose derivatives. This flexible shell structure enables controlled release and uniform distribution of the catalyst throughout the detergent formulation, maintaining dosing accuracy while achieving homogeneous mixing

Inventive Principle:

Principle #30Flexible shells and thin films

2Productivity

If catalyst is dosed at low levels to improve bleaching performance, then hydrogen peroxide decomposition is reduced, but storage stability of the catalyst deteriorates

Engineering Contradiction:

Improvebleaching performanceVSAvoidcatalyst storage stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The coating layer acts as a protective shell that isolates the manganese catalyst from environmental factors during storage, preventing premature decomposition and maintaining catalyst stability. The binding agents in the coating provide a stable matrix that protects the catalyst while allowing it to remain active at low dosing levels

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The coating layer serves as an intermediary between the catalyst and the external environment, mediating protection during storage while allowing catalyst function during use. The binding agents and inert materials in the coating create a buffer that maintains catalyst stability without requiring high dosing levels

Inventive Principle:

Principle #24Intermediary (Mediator)

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 provides improved storage stability and increased bleaching activity, maintaining performance over extended storage periods and ensuring consistent bleaching performance by maintaining the catalyst in an amorphous or nanocrystalline form within the composition.

Implementation Method 1

The catalyst is incorporated in a non-crystalline or nanocrystalline form, enhancing storage stability and bleaching activity

Methodology Applied

Scientific EffectAmorphous solid formation:

Implementation Method 2

The catalyst is incorporated in a non-crystalline or nanocrystalline form, enhancing storage stability and bleaching activity

Methodology Applied

Scientific EffectNanocrystalline structure:

Implementation Method 3

Transition metal complexes, such as manganese catalysts based on triazacyclononane ligands are known to be active catalysts in the bleaching of stains in laundry detergent products

Methodology Applied

Scientific EffectCatalysis: Catalysis

Implementation Method 4

The present invention concerns compositions that comprise a water-soluble polymer, an absorbent and a selected water-soluble bleaching catalyst... which compositions are prepared by dosing a solution of said water-soluble bleaching catalyst... The invention further relates to methods of oxidising with the bleaching formulations described herein

Methodology Applied

Scientific EffectOxidation: Oxidation

Data Source

PatentUS20230365899A1Compositions comprising bleaching catalyst, manufacturing process thereof, and bleaching and cleaning agent comprising same

Publication Date: 2023.11.16 WEYLCHEM PERFORMANCE PRODUCTS GMBH

AI summary

The present invention concerns a composition comprising manganese containing catalyst salts, a water-soluble polymer and a polysaccharide absorbent. The invention also concerns a method of making such compositions, preferably in the form of a granule, and bleaching formulations comprising the salt and a peroxy compound or precursor thereof. The catalyst salt containing composition and formulations comprising it, are suitable for use in catalysing oxidation, for example as a component of a laundry or dishwasher bleaching composition. The invention further relates to cleaning agents comprising the compositions described herein.