Monosilane Separation Process Using Single Condenser and Subcooler
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Solution Overview
Problem
Existing processes for producing monosilane from chlorosilanes-rich mixtures face inefficiencies due to low conversion ratios and high refrigeration power consumption, requiring large apparatus and complex parameter determination for separation.
Innovation Solution
A process involving a single condenser for separating monosilane from a mixture of monosilane, monochlorosilane, and trichlorosilane, using a subcooler to cool higher-boiling chlorosilanes and recycle them as reflux to an absorber, achieving efficient separation with reduced refrigeration power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple upper condensers with reflux feed pipes are used for monosilane separation, then separation efficiency is improved, but refrigeration power consumption increases and device complexity increases
Solution Approach 1:
The patent extracts and removes the reflux feed pipe from the condenser system, using only a single condenser without reflux capability. This simplification reduces the number of components while maintaining effective monosilane separation through alternative means, thereby reducing refrigeration power consumption and device complexity
Solution Approach 2:
The patent merges the functions of multiple condensers with reflux pipes into a single condenser unit. By combining the separation function into one device without the additional complexity of reflux systems, the patent achieves the same separation efficiency with lower energy consumption and simpler device architecture
2Manufacturing precision
If multiple upper condensers with reflux feed pipes are used for monosilane separation, then separation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent removes the reflux feed pipe component from the condenser system entirely, retaining only the essential condensation function. This extraction of unnecessary components simplifies the device structure while preserving monosilane separation effectiveness
Solution Approach 2:
The patent consolidates the separation function into a single condenser unit, merging what would otherwise require multiple condensers with reflux pipes into one simplified device. This reduction in component count directly lowers device complexity while maintaining separation performance
3Productivity
If the number of upper condensers is increased for monosilane production, then monosilane production amount increases, but refrigeration power consumption increases
Solution Approach 1:
The patent removes the reflux feed pipe system that would otherwise be required to support multiple condensers. By using a single condenser without reflux capability, the patent achieves high monosilane production amounts while avoiding the increased refrigeration power consumption that would be necessary for multi-condenser reflux systems
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 process enhances monosilane separation efficiency and reduces refrigeration power consumption by half, simplifying the system design and operation while maintaining high monosilane purity.
Implementation Method 1
Introducing said mixture to a condenser for separating lower-boiling chlorosilanes-containing monosilane from higher-boiling chlorosilanes enriched condensates
Implementation Method 2
Sending higher-boiling chlorosilanes enriched condensates from the aforesaid condensate buffer into a subcooler which is installed on a reflux feed line connected to the upper portion of a chlorosilane absorber
Data Source
AI summary
A process for separating monosilane from a mixture comprising monosilane and chlorosilanes comprising: a) Introducing mixture to a condenser (3) for separating lower-boiling chlorosilanes—containing monosilane from higher-boiling chlorosilanes enriched condensates; b) Collecting said higher-boiling condensates, in a condensate buffer (19) connected to the aforesaid condenser (3) by a condensate feed pipe (8); c) Sending higher-boiling chlorosilanes enriched condensates from the aforesaid condensate buffer (19) into a subcooler (21) which is installed on a reflux feed line (7) connected to the upper portion of a chlorosilane absorber (20); d) Feeding lower-boiling chlorosilanes—containing monosilane to the aforesaid chlorosilane absorber (20) for separating monosilane; e) Extracting monosilane—rich gas from the upper portion of the aforesaid chlorosilane absorber (20).