Triazine-Based Polymer Flocculant for Sludge Dewatering
Solution Overview
Problem
Existing methods for producing water-soluble polymer flocculants struggle to create polymers with controlled branched or cross-linking structures, leading to insufficient performance in flocculation and high moisture content in dehydrated cakes, due to the use of water-insoluble swollen gels and low reactivity of cross-linking agents.
Innovation Solution
A copolymer of a cross-linkable monomer with a structure derived from specific formulas and a water-soluble unsaturated monomer is used, allowing for the formation of a polymer with controlled viscosity and reactivity, resulting in a polymer flocculant with excellent water solubility and dispersibility, suitable for applications in sewage treatment and papermaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cross-linking agent with two or more vinyl groups or allyl groups is used, then cross-linking structure is formed, but the reactivity is low and sufficient flocculation performance is not obtainable
Solution Approach 1:
The patent changes the chemical structure parameters of the cross-linking agent by introducing a triazine ring with exocyclic double bonds. This structural modification significantly increases the reactivity of the cross-linking agent compared to conventional vinyl or allyl groups, enabling sufficient flocculation performance while maintaining controlled cross-linking
Solution Approach 2:
The patent creates a composite structure by combining the triazine ring cross-linking agent with water-soluble polymer chains. This composite approach allows the highly reactive triazine core to provide strong cross-linking while the water-soluble polymer segments maintain solubility and flocculation effectiveness
2Stability of the object's composition
If a water-insoluble swollen gel is obtained, then three-dimensional network structure is formed, but it is difficult to produce a water-soluble or water dispersible polymer with controlled branched chain
Solution Approach 1:
The patent applies local quality by creating localized cross-linking regions through the triazine ring structure while maintaining water-soluble segments throughout the polymer chain. This allows the formation of a three-dimensional network in specific areas without compromising overall water solubility and dispersibility
Solution Approach 2:
The patent changes the hydrophilicity parameter by selecting water-soluble monomers for the polymer chains that will be cross-linked. This ensures that even with the formation of a three-dimensional network structure, the overall polymer remains water-soluble or water-dispersible
3Productivity
If the reactivity of cross-linking agents is increased, then cross-linking efficiency is improved, but control over polymer structure becomes more difficult
Solution Approach 1:
The patent changes the reactivity parameter of the cross-linking agent through the triazine ring structure, achieving high cross-linking efficiency. Simultaneously, the functional groups on the triazine ring are designed to provide controlled reaction sites, maintaining manufacturing precision
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 polymer flocculant effectively forms coarse flocks with high affinity for sludge, reducing moisture content in dehydrated cakes and improving flocculation performance, while maintaining low viscosity and handleability, and can be produced at a low cost using a general aqueous solution polymerization method.
Implementation Method 1
a copolymer of a cross-linkable monomer (a) having a structure derived from Formula (I) in the molecule, and a water-soluble unsaturated monomer (b) having a polymerizable unsaturated bond in the molecule
Data Source
AI summary
Provided is a polymer flocculant which is capable of controlling the structure of a polymer that is a copolymerization product of a monomer (a) having a structure derived from formula (I) in each molecule and a water-soluble unsaturated monomer (b) having a polymerizable unsaturated bond in each molecule, and which has a branched or cross-linking structure, and is excellent in water-solubility and water dispersibility,In formula (I), R1 and R2 are respectively a linear or branched functional group configured of atoms selected from the group consisting of carbon not having a carbon-carbon unsaturated bond, oxygen, nitrogen, and hydrogen; W is a non-metal element of the group 15; X and Y are each a linear or branched functional group configured of atoms selected from the group consisting of carbon, oxygen, nitrogen, and hydrogen, and each have at least one carbon-carbon unsaturated bond, provided that X and Y have different structures; and Z is a chlorine ion, a bromine ion, or an iodine ion.