Superabsorbent Polymer Particle Process for Faster Liquid Absorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing processes for producing superabsorbent polymer particles do not effectively enhance absorption speed.
Innovation Solution
Incorporating a chelating agent and aluminum cations into the monomer solution during polymerization, followed by thermal surface post-crosslinking with aluminum hydroxide application, to improve absorption speed and permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional polymerization processes are used without chelating agents and aluminum cations, then the production process is simple, but the absorption speed is insufficient
Solution Approach 1:
The chelating agent and aluminum cations are added to the monomer solution before polymerization begins, pre-establishing the conditions for enhanced absorption speed in the final product. This preliminary action during monomer preparation resolves the contradiction by incorporating the speed-enhancing components at the start of the process rather than requiring complex post-processing steps
Solution Approach 2:
The invention changes the chemical composition parameters of the monomer solution by introducing specific concentrations of chelating agents (0.001-1.00 mol-%) and aluminum cations (0.0001-0.100 mol-%). These parameter changes directly improve absorption speed while maintaining a relatively simple overall process structure
2Speed
If aluminum salts are added to improve absorption speed, then absorption speed increases, but the control over the polymerization process becomes more difficult
Solution Approach 1:
The chelating agent acts as an intermediary between the aluminum cations and the polymerization process. It complexes with the aluminum cations to form stable chelates, thereby controlling their reactivity and preventing unwanted side reactions. This intermediary role allows aluminum salts to improve absorption speed while maintaining good process control through defined dosage ranges
Solution Approach 2:
By precisely controlling the concentration parameters of aluminum cations (0.0001-0.100 mol-%) and chelating agents (0.001-1.00 mol-%), the invention achieves improved absorption speed while maintaining manufacturing precision. The specific parameter ranges ensure that the aluminum salts enhance performance without causing uncontrolled polymerization
3Speed
If thermal surface post-crosslinking is performed to enhance absorption properties, then absorption speed and permeability improve, but energy consumption increases
Solution Approach 1:
The aluminum cations and chelating agents are incorporated during the initial polymerization stage, creating a foundation for enhanced absorption properties that reduces the need for extensive subsequent thermal treatment. This preliminary action partially achieves the absorption enhancement early, thereby reducing the energy required in later post-crosslinking steps
Solution Approach 2:
The invention optimizes the thermal post-crosslinking parameters by controlling temperature and time to achieve the desired absorption speed and permeability with minimal energy input. The pre-established aluminum-chelating agent complexes during polymerization allow for more efficient thermal processing in the post-crosslinking stage
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 process results in superabsorbent polymer particles with enhanced absorption speed and permeability, as demonstrated by improved centrifuge retention capacity and gel bed permeability.
Implementation Method 1
the monomer solution comprises a chelating agent and aluminum cations
Implementation Method 2
Addition of chelating agents alone or addition of aluminum cations alone has no effect or a contrary effect on the absorption speed
Implementation Method 3
Aluminum hydroxide on the surface of the superabsorbent polymer particles improves the permeability
Implementation Method 4
thermally surface post-crosslinking of the polymer particles
Data Source
AI summary
The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, drying the formed polymer gel, grinding the dried polymer gel, classifying and thermally surface post-crosslinking the polymer particles, wherein the monomer solution comprises a chelating agent and an aluminum salt.