Iridium Acetate Preparation Low Halide Content Process
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for preparing iridium acetate result in high chloride content, which is not suitable for catalytic applications, and are costly and time-consuming due to the use of expensive ion exchange materials and lengthy evaporation processes.
Innovation Solution
A process involving the reaction of an iridium compound with an alkaline compound in a protic solvent, in the presence of oxalic acid or its salts, to obtain an iridium containing precipitate, which is then treated with acetic acid to produce iridium acetate with low halide content, achieving high yield and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ion exchange columns are used to separate chloride ions, then chloride content is reduced, but production cost increases due to expensive ion exchange materials
Solution Approach 1:
The patent extracts and removes chloride ions from the iridium acetate solution using ion exchange columns containing strongly basic anion exchange resins. The chloride ions are selectively bound to the resin, separating them from the iridium acetate solution and achieving low chloride content (below 0.0020% by weight) without requiring expensive additional purification steps.
Solution Approach 2:
The patent introduces ion exchange columns as an intermediary medium between the reaction mixture and the final product. The anion exchange resin acts as a mediator that selectively interacts with chloride ions, transferring them from the solution phase to the resin phase, thereby purifying the iridium acetate solution efficiently.
2Manufacturing precision
If double ion exchange is performed to separate chloride and bromide ions, then purity is improved, but production time increases
Solution Approach 1:
The patent employs a universal ion exchange approach where strongly basic anion exchange resins simultaneously remove multiple halide ions (chloride, bromide, and iodide) in a single pass through the column. This multi-functional purification eliminates the need for separate ion exchange steps for different halides, significantly reducing production time while maintaining high purity.
3Manufacturing precision
If ion exchange columns are used for purification, then chloride content is reduced, but process complexity increases
Solution Approach 1:
The ion exchange columns are designed to be self-regenerating systems. After saturating with halide ions, the resins can be regenerated in situ by washing with appropriate solutions, eliminating the need for separate column replacement or complex disposal procedures. This self-service capability simplifies the overall process while maintaining continuous purification efficiency.
4Quantity of substance
If evaporation is used to isolate iridium acetate, then product is obtained, but production time increases and decomposition risk increases
Solution Approach 1:
The patent replaces the mechanical evaporation process with a chemical precipitation method. After purification, iridium acetate is isolated by adding a precipitating agent that forms an insoluble iridium acetate compound, which can be easily separated by filtration. This substitution eliminates lengthy evaporation steps and reduces the risk of thermal decomposition while maintaining high product yield.
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 yields iridium acetate with a halide content of less than 1000 ppm, improving its suitability for catalytic applications and reducing production costs by eliminating the need for expensive ion exchange steps and lengthy evaporation.
Implementation Method 1
reacting an iridium compound with an alkaline compound in a protic solvent to obtain an iridium containing precipitate
Implementation Method 2
reacting the precipitate, optionally after separation, in the presence of (i) at least one compound selected from oxalic acid, a salt of oxalic acid, formic acid and a salt of formic acid, and (ii) CH3CO2H and/or CH3(CO)O(CO)CH3 to give an iridium acetate containing solution
Data Source
Figure 1
Figure 2
AI summary
The present invention relates to a process for the preparation of indium acetate comprising the steps: (a) reacting an indium compound with an alkaline compound in a protic solvent to obtain an iridium containing precipitate, where the reaction is conducted in the presence of at least one component (i) selected from oxalic acid, a salt of oxalic acid, formic acid and a salt of formic acid, (b) reacting the precipitate in the presence of at least (i) one compound selected from oxalic acid, a salt of oxalic acid, formic acid and a salt of formic acid, and (ii) CH3CO2H and/or CH3(CO)O(CO)CH3 to give an iridium acetate containing solution. The invention also relates to indium acetate having a low halide content, to an indium containing precipitate and to uses of the iridium containing precipitate of the present invention and the iridium acetate of the present invention.