Alkaline Detergent Copolymer for Hard Water Scale Control
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Solution Overview
Problem
Conventional alkaline detergents face challenges in hard water environments due to excessive water hardness, leading to scale deposition and reduced cleaning efficacy, and are often reliant on phosphorus-containing compounds that are environmentally and health-concerned, necessitating an alternative for effective scale control.
Innovation Solution
A detergent composition comprising an alkali metal hydroxide and a copolymer with specific monomers, such as monoethylenically unsaturated C3-C8-carboxylic acids and nonionic monomers, which forms a stable solution free of phosphates, effectively controlling hard water scale without using NTA or EDTA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phosphates or NTA are used as sequestering agents in alkaline detergents, then scale control and cleaning effectiveness are improved, but environmental and health concerns arise due to phosphate pollution and persistence of aminocarboxylates
Solution Approach 1:
The invention extracts and removes harmful substances (phosphates and NTA) from the detergent formulation while maintaining the essential scale control function through alternative sequestering agents such as EDTA, carboxymethyl cellulose, and other non-phosphate, non-NTA sequestering agents that are environmentally friendly
Solution Approach 2:
The invention changes the chemical composition parameters by substituting phosphate and NTA-based sequestering agents with alternative agents having different chemical structures (EDTA, carboxymethyl cellulose, etc.), thereby achieving the same scale control function without the harmful environmental effects
2Reliability
If chelating agents are added to counteract water hardness, then cleaning effectiveness is improved, but the water hardness may exceed the chelating capacity causing free calcium ions to cause precipitation and scale build up
Solution Approach 1:
The invention uses a composite approach by combining multiple types of sequestering agents (EDTA, carboxymethyl cellulose, and other non-phosphate sequestering agents) in the detergent formulation, creating a synergistic effect that provides sufficient chelating capacity to handle high water hardness levels and prevent scale precipitation
3Ease of operation
If conventional alkaline detergents are used in hard water environments, then cleaning function is provided, but scale deposition occurs on surfaces and machine components reducing cleaning efficacy
Solution Approach 1:
The invention applies preliminary anti-action by incorporating sequestering agents that proactively bind calcium and magnesium ions before they can react with soap to form scale, thereby preventing scale deposition on surfaces and machine components while maintaining the cleaning function of the detergent
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 composition maintains cleaning effectiveness while preventing scale deposition on surfaces and machine components, adhering to environmental regulations by eliminating phosphate content and providing efficient scale control across various cleaning applications.
Implementation Method 1
the copolymer... for water scale control... sequestering agent to sequester metal ions associated with hard water such as calcium, magnesium and iron
Implementation Method 2
the ability of NTA, EDTA and polyphosphates to solubilize preexisting inorganic salts... the copolymer... effectively controlling hard water scale
Data Source
AI summary
An alkaline detergent is described which includes the use of a copolymer in combination with an alkali metal hydroxide. The detergent maintains cleaning functions and also prevents hard water scaling, for example at application temperatures of between 145 - 180 degrees Fahrenheit and with a pH of 9.5 to about 13.