Chelatable EDDHA Synthesis with Fast Precipitation and High Purity
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Solution Overview
Problem
Existing methods for synthesizing chelatable EDDHA are inefficient and difficult to scale up economically due to long precipitation times and high impurity content, making it challenging to produce high-purity EDDHA suitable for semiconductor processes.
Innovation Solution
A method involving the synthesis of phenol, ethylenediamine, and glyoxylic acid at elevated temperatures (75-80°C) followed by heating the product at 55-65°C to collect and wash with a cleaning solution, reducing impurities and increasing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the synthesis reaction is carried out at elevated temperature (75-80°C) for a shorter duration (2-4 hours), then the synthesis yield is improved and production time is reduced, but the reaction requires more energy input
Solution Approach 1:
The patent changes the reaction temperature parameter from conventional lower temperatures to elevated temperatures (75-80°C), which fundamentally alters the reaction kinetics and allows the synthesis to proceed faster with higher yield, resolving the contradiction between productivity and energy input by optimizing the temperature parameter
Solution Approach 2:
The patent implements continuous heating at elevated temperature throughout the synthesis process (2-4 hours) to maintain optimal reaction conditions, ensuring continuous productive action rather than intermittent processing, thereby maximizing yield while managing energy consumption through sustained thermal input
2Productivity
If the product is collected by heating at 55-65°C for 30 minutes to 2 hours, then the collection rate is improved and purification is enhanced, but the process time increases
Solution Approach 1:
The patent utilizes phase transition (precipitation) of the product upon heating to 55-65°C, where the product transitions from dissolved state to solid precipitate, enabling rapid separation and collection within 30 minutes to 2 hours, thus achieving high collection rate with controlled time expenditure
Solution Approach 2:
The patent changes the temperature parameter during collection from room temperature to elevated temperature (55-65°C), which fundamentally alters the solubility characteristics of the product, enabling rapid precipitation and collection while managing the time required for this thermal process
3Quantity of substance
If conventional synthesis methods are used with long precipitation time (72 hours or longer), then the product can be collected, but the production efficiency is reduced and additional purification steps are required
Solution Approach 1:
The patent fundamentally changes the temperature parameter during synthesis and collection, using elevated temperatures (75-80°C for synthesis, 55-65°C for collection) that dramatically accelerate the precipitation process from 72+ hours to 30 minutes to 2 hours, thereby resolving the contradiction between product collection and production efficiency
Solution Approach 2:
The patent implements continuous heating and continuous precipitation throughout the collection process, maintaining optimal temperature conditions to ensure continuous product formation and separation, eliminating the need for prolonged static precipitation and subsequent additional purification steps
4Manufacturing precision
If the synthesis is performed to achieve high purity (90% or greater) with low metal content, then the product suitability for semiconductor processes is improved, but the synthesis complexity and purification requirements increase
Solution Approach 1:
The patent changes the temperature parameter during synthesis to elevated temperatures (75-80°C) that promote selective formation of the desired product and minimize side reactions, inherently reducing impurity formation and simplifying the overall synthesis process while achieving high purity without complex purification steps
Solution Approach 2:
The patent converts the potential harm of high temperature (which could cause decomposition) into a benefit by using controlled elevated temperatures (75-80°C) that actually promote selective synthesis and improve product purity, turning what could be a source of impurity into a means of achieving high 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
High-purity chelatable EDDHA is produced with a yield of 18% or greater and purity of 90% or greater, suitable for semiconductor applications with low metal content.
Implementation Method 1
synthesizing a product by reacting the mixture at 75° C. to 80° C.
Implementation Method 2
collecting the product by heating the product to 55° C. to 65° C.
Implementation Method 3
increasing a collection rate of the product through precipitation with heating at a certain temperature
Data Source
AI summary
The present disclosure relates to a method for preparing chelatable EDDHA, and more particularly, to a preparation method capable of preparing high-purity chelatable EDDHA with an excellent yield.