Phosphoryl Imide Salt Production via Low-Water Cation Exchange
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Solution Overview
Problem
Conventional methods for producing phosphoryl imide salts result in low yields and impurities, especially when attempting to exchange cations like lithium, sodium, or magnesium, due to the use of expensive metal hydrides and toxic reagents, making them industrially unfeasible.
Innovation Solution
A method involving cation exchange in an organic solvent with a water content of 0.3% by mass or less using a cation exchange resin or metal salts to produce phosphoryl imide salts with specific alkali metal, alkaline earth metal, or quaternary ammonium cations, enhancing yield and purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods using metal hydrides are used to exchange cations, then phosphoryl imide salts can be produced, but the yield is low and impurities are generated
Solution Approach 1:
The invention changes the water content parameter of the organic solvent from conventional levels to 0.3% by mass or less. This parameter change enables the cation exchange reaction to proceed with high efficiency, achieving both high yield (80% or more) and high purity of phosphoryl imide salt, resolving the contradiction between manufacturing precision and productivity
Solution Approach 2:
The invention introduces a specific organic solvent as an intermediary medium for the cation exchange reaction. By controlling the water content of this solvent to 0.3% or less, the organic solvent facilitates the exchange between phosphoryl imide salt and cations (lithium, sodium, magnesium, or quaternary ammonium) while preventing side reactions that would generate impurities, thus achieving both high yield and high purity
2Manufacturing precision
If expensive metal hydrides are used for cation exchange, then phosphoryl imide salts can be produced, but the production cost increases making it industrially unfeasible
Solution Approach 1:
The invention replaces expensive metal hydrides with inexpensive, readily available reagents such as lithium hydroxide, sodium hydroxide, magnesium hydroxide, or quaternary ammonium hydroxide. These cheaper reagents are used in the cation exchange reaction within the controlled organic solvent system, achieving the same high purity product while dramatically reducing production costs and improving industrial feasibility
3Ease of operation
If water content in organic solvent is not controlled, then the process is simpler, but yield and purity of phosphoryl imide salt decrease
Solution Approach 1:
The invention establishes a specific parameter threshold for water content (0.3% by mass or less) in the organic solvent. This precise parameter control enables the cation exchange reaction to achieve high yield (80% or more) while maintaining operational simplicity. The controlled water level prevents hydrolysis and side reactions without requiring overly complex process conditions
Solution Approach 2:
The invention requires preliminary drying or purification of the organic solvent to achieve the required water content of 0.3% or less before conducting the cation exchange reaction. This preliminary action ensures that the reaction proceeds efficiently from the start, achieving high yield and purity without requiring complex in-process controls or post-processing steps
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 approach allows for the production of phosphoryl imide salts with high yield and purity, overcoming the limitations of conventional methods by minimizing water content and using more accessible and cost-effective reagents.
Implementation Method 1
performing cation exchange by bringing a phosphoryl imide salt represented by general formula (2) into contact with a cation exchange resin having M1n+
Data Source
AI summary
To provide a method for producing a phosphoryl imide salt represented by the following general formula (1) at a satisfactory yield by cation exchange. The method comprises the step of performing cation exchange by bringing a phosphoryl imide salt represented by the following general formula (2) into contact with a cation exchange resin having M1 n+ or a metal salt represented by the general formula (4) in an organic solvent having a water content of 0.3% by mass or less.