Halogenated Silahydrocarbylene Synthesis via Segmented Catalyst Activation
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Solution Overview
Problem
There is a need in the silicones industry for effective methods to prepare halogenated silahydrocarbylenes, which are crucial raw materials for silicone resins but lack efficient production techniques.
Innovation Solution
A two-step method involving the formation of a silicon-containing copper catalyst by reacting a copper catalyst with hydrogen gas and a halogenated silane monomer at high temperatures, followed by contacting the catalyst with an organohalide at moderate temperatures to produce halogenated silahydrocarbylenes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to prepare halogenated silahydrocarbylenes, then the production process is simpler, but the efficiency and effectiveness of preparation are insufficient
Solution Approach 1:
The patent divides the preparation process into two distinct sequential steps: (1) forming a silicon-containing copper catalyst by reacting copper catalyst with hydrogen gas and halogenated silane monomer at 500-1400°C, and (2) contacting the silicon-containing copper catalyst with organohalide at 100-600°C to produce halogenated silahydrocarbylenes. This segmentation allows each step to be optimized independently, improving overall preparation efficiency while maintaining manageable process complexity through clear separation of functions.
2Productivity
If a single-step method is used, then the process is more straightforward, but the production efficiency and product quality are inadequate
Solution Approach 1:
The patent implements preliminary action by first preparing a silicon-containing copper catalyst in step (1) before using it in step (2). The copper catalyst is pre-treated with hydrogen gas and halogenated silane monomer at high temperatures (500-1400°C) to form an activated catalyst with at least 0.1% silicon content. This preliminary activation enhances the catalyst's effectiveness in the subsequent reaction with organohalide, thereby improving production efficiency while the modular nature keeps manufacturing relatively simple.
3Reliability
If high temperature treatment is applied, then the catalyst activity is enhanced, but the energy consumption increases
Solution Approach 1:
The patent employs parameter changes by optimizing the temperature range for different process steps: step (1) uses high temperatures (500-1400°C) to form and activate the silicon-containing copper catalyst, while step (2) uses moderate temperatures (100-600°C) for the actual synthesis reaction. This staged temperature optimization ensures high catalyst activity where needed while reducing energy consumption in subsequent steps, balancing reliability and energy efficiency.
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 enables the efficient production of halogenated silahydrocarbylenes, improving the availability of raw materials for silicone resin production and potentially enhancing the quality and consistency of silicone products.
Implementation Method 1
contacting a copper catalyst with hydrogen (H2) gas and a halogenated silane monomer at a temperature of 500°C to 1400°C to form a silicon-containing copper catalyst
Implementation Method 2
contacting the silicon-containing copper catalyst with an organohalide at a temperature of 100°C to 600°C to form a reaction product comprising a halogenated silahydrocarbylene
Data Source
AI summary
A method comprises separate and consecutive steps (i) and (ii). Step (i) includes contacting a copper catalyst with hydrogen gas and a halogenated silane monomer at a temperature of 500 °C to 1400 °C to form a silicon-containing copper catalyst comprising at least 0.1 % (w/w) of silicon. Step (ii) includes contacting the silicon-containing copper catalyst with an organohalide at a temperature of 100°C to 600 °C to form a reaction product. The organohalide has formula HaCbXc, where X is a halogen atom, subscript a is an integer of 0 or more, subscript b is an integer of 1 or more, and subscript c is an integer of 2 or more. The method produces a reaction product. The reaction product includes a halogenated silahydrocarbylene.