Acid Functionalized Silicates Purify Polyalkylene Oxide Polymers
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Solution Overview
Problem
Current methods for purifying crude polyalkylene oxide polymers are inefficient in removing alkaline catalysts, which are essential for producing high-quality urethane polymers, as they often leave residual catalysts that can affect the polymer's properties and characteristics.
Innovation Solution
The use of acid functionalized silicates, such as acid functionalized magnesium silicate, to effectively remove catalysts from crude polyalkylene oxide polymers by contacting them in an amount sufficient to neutralize and adsorb the alkaline impurities, thereby purifying the polymers for use in urethane production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional purification methods are used to remove catalysts from crude polyalkylene oxide polymers, then the polymers can be processed, but residual catalysts remain that affect polymer properties and characteristics
Solution Approach 1:
The patent changes the chemical parameters of the purification system by using acid-functionalized silicates with specific acid groups (carboxylic, sulfonic, phosphonic, or boronic acid) to alter the interaction mechanism between the adsorbent and alkaline catalysts, enabling effective removal while maintaining polymer quality
Solution Approach 2:
The patent employs composite acid-functionalized silicate materials that combine the adsorptive properties of silicates with the acidic functionality of organic or inorganic acid groups, creating a material with enhanced catalyst removal capability that achieves both high purity and reliable polymer properties
2Manufacturing precision
If more catalyst is removed from crude polyalkylene oxide polymers, then polymer purity improves, but the complexity of the purification process increases
Solution Approach 1:
The patent extracts the harmful alkaline catalysts from the crude polyalkylene oxide polymer matrix by contacting with acid-functionalized silicates, selectively removing only the catalyst impurities while leaving the desired polymer product intact, thereby achieving high purification precision without complex multi-step processes
Solution Approach 2:
The acid-functionalized silicates act as intermediary substances that facilitate the removal of alkaline catalysts through acid-base interactions, providing a simple yet effective mediation mechanism that achieves high catalyst removal efficiency without requiring complex equipment or multiple processing stages
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
This method significantly reduces residual catalyst concentrations to less than 0.001%, ensuring the production of urethane polymers with desired properties by enhancing the adsorption capacity and efficiency of catalyst removal, improving the overall quality and purity of polyalkylene oxide polymers.
Implementation Method 1
contacting the crude polyalkylene oxide polymer with an acid functionalized silicate adsorbent containing at least one acid selected from the group consisting of carboxylic acid, sulfonic acid, phosphonic acid, and boronic acid
Data Source
AI summary
A method of purifying a crude polyalkylene oxide polymer that contains a catalyst, such as potassium hydroxide. The method comprises contacting the crude polyalkylene oxide polymer with a composition comprising an acid functionalized silicate, such as an acid functionalized magnesium silicate adsorbent containing at least one acid in an amount effective to remove the catalyst from the polyalkylene oxide polymer. Such a method provides for an improved removal of the catalyst from the polyalkylene oxide polymer.