Metal Bispidone Chelate Solutions Without Unstable Dispersions
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Solution Overview
Problem
Existing methods for preparing metal bispidone chelate complexes require the preparation of dispersions, which are prone to sedimentation and have inconsistent particle size distributions, leading to stability issues and process complications in large-scale production.
Innovation Solution
A method involving the direct reaction of metal salts and bispidone ligands in a solvent comprising alkylesters of alcohols, allowing for the formation of a homogeneous solution without the need for dispersions, using alkylesters that exhibit excellent solubility and miscibility for both components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If dispersions are used to prepare metal bispidone chelate complexes, then the reaction can proceed with heterogeneous components, but the dispersion is prone to sedimentation and has inconsistent particle size distributions leading to stability issues
Solution Approach 1:
The patent changes the physical state parameter from heterogeneous dispersion to homogeneous solution by selecting appropriate solvents (alkylesters of alcohols) that dissolve both the bispidone ligand and metal salt, eliminating sedimentation and particle size distribution issues while maintaining ease of preparation
Solution Approach 2:
The patent introduces alkylester solvents as intermediary substances that facilitate the dissolution and homogeneous mixing of reactants, acting as a medium that enables reliable stable solutions without requiring dispersion stabilization
2Ease of manufacture
If dispersions are used, then the process can handle solid powders directly, but intensive stirring is required to maintain homogeneity which consumes more energy
Solution Approach 1:
The patent changes the physical state parameter from solid dispersion to liquid solution, allowing reactants to mix homogeneously without intensive stirring, thereby reducing energy consumption while maintaining ease of handling
3Manufacturing precision
If dispersions are used, then the particle size distribution is determined by the powder particle size, but this leads to inconsistent dispersion quality and formation of big lumps during storage
Solution Approach 1:
The patent changes the physical state from heterogeneous dispersion to homogeneous solution, eliminating particle size distribution issues and lump formation during storage, ensuring consistent composition without compromising manufacturing precision
4Ease of manufacture
If a heterogeneous reaction is used, then the reaction can proceed with dispersed phases, but the formed complex has low solubility and precipitates requiring separation
Solution Approach 1:
The patent changes the solubility parameter by selecting alkylester solvents that maintain high solubility of the metal bispidone chelate complex throughout the reaction and storage, eliminating precipitation and the need for separation processes while keeping the reaction process simple
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 method enables the production of a stable, homogeneous solution of metal bispidone chelate complexes with consistent particle sizes, improving process stability and efficiency in oxidative drying systems for coatings and inks.
Implementation Method 1
alkylesters of at least one alcohol do not only have an excellent solubility for bispidone ligands, an excellent solubility for metal bispidone chelate complexes as well as an excellent miscibility with water
Implementation Method 2
Metal bispidone chelate complexes are effective catalysts which are used for oxidation reactions with atmospheric oxygen
Implementation Method 3
Other applications for solutions of such metal bispidone chelate complexes in a solvent are their use as a siccative for the drying of unsaturated binders, such as alkyd resins and/or oil-based varnishes and/or unsaturated polyesters in inks and coatings
Data Source
AI summary
The present invention relates to a method for preparing a solution of one or more metal complexes according to the general formula (1) in a solvent comprising at least one alkylester of at least one alcohol, wherein the method comprises the steps of: a) providing a solution of at least one metal salt in a solvent comprising water or a mixture of water and at least one alkylester of at least one alcohol, wherein the at least one metal of the at least one metal salt is selected from the group consisting of Mn, Cu, Fe, Zn, Ti, V, Mo, W, Tc, In, Ga, Y, Re and combinations thereof, b) providing a solution of a bispidone ligand according to the general formula (2) in a solvent comprising at least one alkylester of at least one alcohol and c) adding the solution of a bispidone ligand provided in step b) into the solution of at least one metal salt provided in step a) or vice versa, and allowing to react the so obtained mixture so as to obtain the solution of one or more metal complexes according to the general formula (1) in the solvent comprising at least one alkylester of at least one alcohol.