Bidentate Diphosphite Synthesis Selectivity Control
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Solution Overview
Problem
Current methods for synthesizing bidentate diphosphites are complex and costly due to low temperature requirements and high viscosity of product mixtures, leading to inefficiencies and increased operational costs.
Innovation Solution
A method involving the contact of a phosphorochloridite with a bisaryl compound and a tertiary organic amine, controlling mole ratios and feed rates to produce diphosphites with high selectivity between 70% and 100%, while maintaining low water content and operating temperatures between 10°C to 110°C.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional methods are used to synthesize diphosphites, then the process can proceed with standard reagents, but the product selectivity is low and operational costs are high due to low temperature requirements and high viscosity
Solution Approach 1:
The patent changes the temperature parameter from traditional low temperature requirements to a range of 10°C to 110°C, and modifies the reaction conditions by controlling water content below 300 ppm and using specific mole ratios of reagents. These parameter changes improve product selectivity to 70-100% while eliminating the need for expensive low-temperature equipment and reducing operational costs.
Solution Approach 2:
The patent applies local quality by controlling the water content specifically below 300 ppm in the reaction mixture, using a tertiary organic amine with basic nitrogen atoms to neutralize HCl locally at the reaction site, and maintaining specific concentration ranges of phosphorochloridite (0.02-2.0 M) to optimize the reaction environment for high selectivity without requiring extreme conditions.
2Manufacturing precision
If low temperature and high viscosity conditions are maintained, then product selectivity may be preserved, but operating cost and process complexity increase significantly
Solution Approach 1:
The patent fundamentally changes the temperature parameter from traditional low-temperature requirements to a practical range of 10°C to 110°C, and controls viscosity by maintaining specific reactant concentrations and water content below 300 ppm. This eliminates the need for complex temperature control systems and high-viscosity handling equipment, reducing process complexity while maintaining 70-100% selectivity.
Solution Approach 2:
The patent performs preliminary action by pre-drying reagents to maintain water content below 300 ppm before the reaction, and by pre-establishing the correct mole ratios of phosphorochloridite to bisaryl compound (2:1 to 3:1). This preliminary preparation ensures high selectivity from the start without requiring complex in-process adjustments or extreme temperature conditions.
3Manufacturing precision
If water content is not controlled, then the process is simpler, but selectivity to desired diphosphite product decreases
Solution Approach 1:
The patent sets a specific water content parameter below 300 ppm in the reaction mixture, which is achievable through standard drying techniques. This parameter control improves selectivity to 70-100% while maintaining process simplicity, as the water control is implemented through conventional means rather than complex systems.
Solution Approach 2:
The patent implements feedback by monitoring and controlling water content in the reaction mixture to maintain it below 300 ppm. This feedback control ensures high product selectivity while using straightforward measurement and control methods, balancing precision with ease of manufacture.
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 simplifies the synthesis of bidentate diphosphites, improving selectivity and reducing operational costs by optimizing reaction conditions and minimizing water contamination, thereby enhancing the efficiency of the process.
Implementation Method 1
A function of the tertiary organic amine is to neutralize the HCl co-product in both reaction steps through the formation of a tertiary organic amine hydrogen chloride salt
Implementation Method 2
contacting a phosphorochloridite of Structure II with a bisaryl compound selected from the group consisting of Structure III, Structure IV, and Structure V, and a tertiary organic amine, comprising a basic nitrogen atom or a plurality of nitrogen atoms, to produce a reaction mixture comprising a diphosphite of Structure I
Data Source
AI summary
Disclosed is a method for making a diphosphite of Structure I.