Complex Acidic Salt Synthesis via pH Control
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Solution Overview
Problem
Current methods for producing complex salts of divalent metals and dicarboxylic acids are inefficient, resulting in mixtures with variable composition and hydration levels, making it difficult to achieve high-purity, anhydrous products suitable for industrial use due to issues with stoichiometry, solubility, and impurity formation during synthesis and drying processes.
Innovation Solution
A method involving controlled heating and stirring of a reactor with precise molar ratios of metal oxides and dicarboxylic acids in water, followed by cooling, sedimentation, filtration, and drying to produce complex acidic salts with a defined composition, allowing for the production of salts with a predetermined ratio of Me:Ac and controlled hydration levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional synthesis methods are used to produce complex salts of divalent metals and dicarboxylic acids, then a wide spectrum of compounds is formed including neutral salts and complex salts with variable composition, but the biological effects are not studied and they are not allowed to be used in food, pharmaceutical and veterinary industries
Solution Approach 1:
The invention changes the pH parameter during synthesis to maintain it within 2-4 units below the equivalence point, and controls the molar ratio of acid to metal salt at 2:1. These parameter changes ensure that only complex acidic salts with the composition Me(AcH)2.nH2O are formed, excluding neutral salts and other unwanted compounds, thereby ensuring reliability for industrial use while maintaining compositional versatility
Solution Approach 2:
The invention implements feedback control by monitoring and maintaining pH within specific ranges during the synthesis process. The pH is kept 2-4 units below the equivalence point to ensure selective formation of complex acidic salts. This feedback mechanism prevents formation of unwanted neutral salts and ensures consistent product composition suitable for pharmaceutical and food industries
2Adaptability or versatility
If conventional synthesis methods are used, then complex salts with variable composition are formed, but obtaining such complex salts of high purity is difficult and expensive
Solution Approach 1:
The invention applies parameter changes by controlling pH to be 2-4 units below the equivalence point and maintaining a 2:1 molar ratio of acid to metal salt. These controlled parameters ensure that only complex acidic salts with defined composition Me(AcH)2.nH2O are formed, achieving high purity (at least 95% of the mass) while allowing compositional variability through different metal cations and dicarboxylic acid anions
Solution Approach 2:
The invention uses partial action by adding excess dicarboxylic acid (2:1 molar ratio) to ensure complete complexation of metal cations while preventing formation of neutral salts. This excess acid approach ensures high purity of complex acidic salts by suppressing side reactions that would produce unwanted neutral compounds
3Stability of the object's composition
If conventional synthesis methods are used, then salts with coordinated water molecules are formed that determine degree of hydration, but this makes the drying process more difficult and prevents conversion to anhydrous state
Solution Approach 1:
The invention changes the pH parameter to 2-4 units below the equivalence point, which fundamentally alters the hydration characteristics of the resulting salts. This parameter change produces complex acidic salts with defined hydration states that can be easily controlled and removed during drying, enabling complete dehydration to anhydrous form without compromising the complex acidic salt structure
Solution Approach 2:
The invention performs preliminary action by controlling the synthesis conditions (pH and molar ratio) to pre-determine the hydration state of the complex acidic salts before drying. This preliminary control of hydration allows for easier and more complete removal of water during subsequent drying processes, enabling production of anhydrous salts
4Quantity of substance
If initial components are added in 1:2 ratio to produce complex salts with structure Me(AcH)2, then the target compound is formed, but co-precipitation of poorly-soluble neutral salt MeSuc occurs and equivalent amount of more soluble MeSuc3 remains in solution
Solution Approach 1:
The invention changes the pH parameter to be 2-4 units below the equivalence point and maintains a 2:1 molar ratio of acid to metal salt. This parameter change ensures selective formation of complex acidic salts Me(AcH)2 while preventing co-precipitation of neutral salts and avoiding formation of overly soluble complexes, thereby achieving homogeneous composition with at least 95% of the mass being the target compound
Solution Approach 2:
The invention uses feedback control by monitoring pH and maintaining it within the 2-4 unit range below equivalence point. This feedback mechanism ensures selective precipitation of complex acidic salts with homogeneous composition, preventing co-precipitation of neutral salts and ensuring that the target compound makes up at least 95% of the precipitated mass
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 enables the production of complex acidic salts with a composition making up at least 95% of the mass, which can be completely dehydrated or have a predetermined water content, enhancing their biological activity and suitability for industrial applications.
Implementation Method 1
stirring the water to dissolve the dicarboxylic acid in the heated water to produce a solution or a suspension
Implementation Method 2
cooling the complex acidic salt to below a temperature of crystallization
Implementation Method 3
sedimenting the complex acidic salt
Implementation Method 4
filtering the complex acidic salt to remove water from the complex acidic salt
Implementation Method 5
drying the complex acidic salt
Data Source
AI summary
A method of obtaining a complex acidic salt of a divalent metal and a dicarboxylic acid includes heating water in a reactor; adding a dicarboxylic acid to the heated water; stirring the water to dissolve the dicarboxylic acid in the heated water to produce a solution or a suspension of the dicarboxylic acid in the heated water; adding MeO to the solution or the suspension, where Me is a divalent metal; continuing the stirring of the solution or suspension until formation of the complex acidic salt Me(AcH)2.nH2O begins, where Ac is an anion of the dicarboxylic acid, and n=0-8; cooling the complex acidic salt to below a temperature of crystallization; sedimenting the complex acidic salt; filtering the complex acidic salt to remove water from the complex acidic salt; and drying the complex acidic salt.