Rapid Mixing Reactor for Continuous Diethyl Methylphosphonite Production
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Solution Overview
Problem
Existing methods for producing diethyl methylphosphonite face challenges such as low yield due to acidolysis by hydrogen chloride, inefficient mixing, high equipment costs, and complex reactor structures, making large-scale continuous production difficult.
Innovation Solution
A system comprising a rapid mixing reactor with a material circulation subsystem, including a rapid mixing member, filter, acid-binding agent premixer, and heat exchanger, which allows for rapid and uniform mixing without mechanical stirring, effectively removing heat and solid waste, and optimizing the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a stirring tank is used for production, then the reactor structure is simple, but the mixing speed is slow and the yield is low
Solution Approach 1:
The patent replaces the mechanical stirring system with a jet mixing system that uses fluid dynamics. High-velocity jets create intense turbulence and mixing without mechanical moving parts, achieving rapid uniform mixing while maintaining structural simplicity. This resolves the contradiction by substituting mechanical agitation with fluid-based mixing.
Solution Approach 2:
The invention employs jet nozzles that introduce high-velocity gas or liquid streams into the reaction zone. These jets create intense mixing through hydraulic and pneumatic forces, achieving rapid blending of reactants without mechanical stirrers. This hydraulic/pneumatic approach maintains simple reactor structure while dramatically improving mixing speed and product yield.
2Productivity
If mechanical stirring is used to achieve uniform mixing, then the mixing effectiveness is improved, but the equipment cost increases due to multiple parallel reactors
Solution Approach 1:
By replacing mechanical stirring with jet mixing, a single reactor can achieve the mixing effectiveness that previously required multiple parallel reactors. The jet-induced turbulence provides sufficient mixing intensity throughout the reaction volume, eliminating the need for multiple units and reducing equipment costs.
Solution Approach 2:
The jet mixing system performs multiple functions within a single reactor: it provides rapid mixing, enhances mass transfer, and maintains homogeneous reaction conditions throughout the vessel. This multi-functionality in a single unit replaces what previously required multiple specialized reactors, reducing overall equipment cost.
3Productivity
If a microreactor is used for rapid mixing, then the mixing speed is improved, but the production capacity is low and equipment cost is high
Solution Approach 1:
The invention segments the mixing function into localized jet zones within a large reactor volume. Multiple jet nozzles are distributed throughout the reactor, creating localized intense mixing zones that collectively provide rapid overall mixing. This segmentation allows the system to achieve microreactor-level mixing speed in a macro-scale reactor, maintaining high production capacity while reducing equipment cost.
Solution Approach 2:
The patent transitions from the confined one-dimensional flow of microreactors to three-dimensional jet-induced turbulence throughout a large reactor volume. The jets create radial and axial mixing components that rapidly homogenize the entire reaction space, achieving rapid mixing without the production capacity limitations of microreactors and at lower equipment cost.
4Manufacturing precision
If the reaction is completed under rapid mixing, then the selectivity for target product is improved, but the heat transfer becomes difficult
Solution Approach 1:
The jet mixing system creates intense turbulence that simultaneously enhances both mass transfer (improving selectivity) and heat transfer. The turbulent eddies and chaotic flow patterns increase the heat transfer coefficient dramatically, allowing efficient heat removal despite the rapid exothermic reaction. This resolves the contradiction by using fluid dynamics to achieve both rapid mixing for selectivity and efficient heat transfer.
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 system achieves high product yield, stable production, and cost-effective large-scale production of diethyl methylphosphonite by minimizing side reactions and reducing equipment complexity.
Implementation Method 1
rapidly and uniformly mixing without mechanical stirring
Implementation Method 2
the exothermic heat is intensive and it is difficult to transfer heat through conventional heat exchange components
Implementation Method 3
it is necessary to neutralize hydrogen chloride in time by introducing an acid-binding agent
Data Source
AI summary
The present invention provides a system for continuously producing diethyl methylphosphonite, comprising a rapid mixing reactor and a material circulation subsystem. An inlet of the rapid mixing reactor is provided with a rapid mixing component; the rapid mixing component comprises a first liquid inlet and a second liquid inlet; the second liquid inlet is used for feeding a material containing methylphosphonous dichloride; the material circulation subsystem comprises a filter, a material distribution unit, an acid binding agent premixer, and a heat exchanger, which are connected in sequence; the filter is also provided with a solid waste outlet; the material distribution unit is also provided with a diethyl methylphosphonite outlet; the acid binding agent premixer is also provided with a reaction raw material inlet and an acid binding agent inlet; an inlet of the filter is connected to an outlet of the rapid mixing reactor; and an outlet of the heat exchanger is connected to the first liquid inlet. A method for continuously producing the diethyl methylphosphonite by using the system can achieve large-scale continuous production of the diethyl methylphosphonite, and has the advantages of high product yield, stable production, and high production benefit.