Halosilane Production Without Organic Solvents
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Solution Overview
Problem
Current methods for producing higher halosilane compounds, such as iodosilanes, are challenging due to the need for organic solvents, which complicate the purification process and are not commercially viable on an industrial scale, especially for photovoltaic and electronics applications that require high purity.
Innovation Solution
A method involving a reaction vessel with a halide source, where a first halosilane compound reacts to form a second halosilane compound with a higher atomic number halogen, eliminating the need for organic solvents and enabling high-purity production by collecting the product stream directly from the vessel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If organic solvents are used in the synthesis of higher halosilanes, then the reaction can be performed, but the purification process becomes complex and time-consuming due to the need to remove solvent contamination to extremely low levels
Solution Approach 1:
The patent removes the organic solvent from the reaction system entirely, extracting the harmful element that caused the purification complexity. By conducting the reaction in the absence of organic solvents, the process eliminates the need for extensive solvent removal operations while maintaining product formation capability.
Solution Approach 2:
The patent changes the fundamental parameter of the reaction medium from organic solvent-based to solvent-free conditions. This parameter change fundamentally alters the purification requirements, allowing for simpler separation processes while maintaining the ability to produce higher halosilane compounds.
2Ease of manufacture
If organic solvents are used in the synthesis of higher halosilanes, then the reaction can be performed, but the process becomes less commercially viable on an industrial scale due to the tedious separation/isolation processes
Solution Approach 1:
The patent extracts and eliminates the organic solvent from the industrial process, removing the bottleneck that limited commercial viability. This extraction allows for streamlined production with reduced processing steps, improving both efficiency and scalability for industrial applications.
Solution Approach 2:
The patent enables continuous operation by eliminating the interruptive solvent removal steps. The reaction can proceed continuously without requiring periodic solvent extraction and purification cycles, thereby improving productivity and commercial viability through more efficient resource utilization.
3Quantity of substance
If higher halosilane compounds are synthesized using conventional methods, then the compounds can be produced, but the purity levels required by photovoltaic and electronics industries are difficult to achieve
Solution Approach 1:
The patent changes the reaction conditions by eliminating organic solvents, which fundamentally improves the purity outcome. This parameter change prevents solvent contamination from entering the product stream, making it easier to achieve the high purity levels (99.5% or higher) required by photovoltaic and electronics industries.
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 allows for the production of high-purity halosilane compounds without organic solvents, simplifying the purification process and achieving commercial viability on an industrial scale, as demonstrated by successful conversions of dichlorosilane to diiodosilane with high yields and purities.
Implementation Method 1
feeding the first halosilane compound into the inlet of the reaction vessel and through the interior volume of the reaction vessel so that it contacts the halide source and reacts to form a second halosilane compound
Data Source
AI summary
A method for making a halosilane compound comprises the steps of: (a) providing a first halosilane compound, (b) providing a reaction vessel containing a halide source disposed inside, (c) feeding the halosilane compound into the reaction vessel, and (d) collecting a product stream from the reaction vessel, where the product stream contains a second halosilane.