Siloxane Decomposition With Carbonates for Solvent-Free Silane Production
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Solution Overview
Problem
Conventional methods for producing silane compounds generate corrosive substances like hydrochloric acid or acetic acid and require organic solvents, leading to environmental pollution and inefficiencies.
Innovation Solution
A method involving the decomposition of siloxane compounds using carbonate compounds and basic compound catalysts, such as alkali metal carbonates or hydroxides, to produce silane compounds without generating corrosive by-products and reducing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods using dihalogenated silane compounds are employed, then silane compounds can be produced, but corrosive substances such as hydrochloric acid are generated
Solution Approach 1:
The patent changes the chemical parameters of the reaction system by replacing dihalogenated silane compounds with siloxane compounds and using carbonate compounds instead of phenol derivatives. This fundamental parameter change transforms the reaction pathway to eliminate corrosive by-products while maintaining production efficiency
Solution Approach 2:
The patent converts the potentially harmful siloxane decomposition into a beneficial process by using carbonate compounds as reactants. The decomposition produces non-corrosive by-products (carbon dioxide and alcohol) instead of harmful acids, turning a potentially dangerous reaction into an environmentally friendly process
2Productivity
If conventional production methods are used, then silane compounds can be produced, but organic solvents are required leading to environmental pollution
Solution Approach 1:
The patent extracts and eliminates the need for organic solvents from the reaction system. By using siloxane compounds with appropriate structural features and carbonate reactants, the reaction proceeds without requiring solvent mediation, thereby eliminating the source of environmental pollution associated with solvent disposal
Solution Approach 2:
The reaction system creates an inherently safer and more environmentally friendly environment by eliminating organic solvents. The use of carbonate compounds and siloxane substrates creates a reaction environment that does not require additional inert or protective atmospheres, reducing overall environmental impact
3Manufacturing precision
If multiple processing steps are employed for purification and treatment, then product quality can be maintained, but process complexity increases
Solution Approach 1:
The patent converts what would traditionally be harmful by-products (acids requiring neutralization) into benign substances (carbon dioxide and alcohol). This eliminates the need for washing steps with bases and reduces purification complexity while maintaining product quality
Solution Approach 2:
The patent merges the reaction and purification steps into a more integrated process. By designing the reaction to produce non-corrosive by-products from the start, the need for separate treatment steps is reduced, allowing the reaction mixture to be processed more directly with fewer unit operations
4Object-affected harmful factors
If waste liquid treatment steps are added, then environmental compliance can be achieved, but production time and cost increase
Solution Approach 1:
The patent converts the waste liquid treatment requirement into a non-issue by designing a reaction that produces environmentally benign by-products. The carbonate decomposition produces carbon dioxide and alcohol, which eliminate or significantly reduce the need for waste liquid treatment steps, thereby reducing production time
Solution Approach 2:
The reaction system is designed to be self-sufficient regarding environmental compliance. The by-products generated (carbon dioxide and alcohol) are inherently environmentally friendly, making the process self-compliant without requiring additional treatment infrastructure or time-consuming disposal procedures
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 method efficiently produces silane compounds with reduced environmental load by avoiding the use of organic solvents and corrosive substances, while maintaining high yield and safety.
Implementation Method 1
heating a mixture comprising: A) a siloxane compound, B) a carbonate compound, and C) a basic compound catalyst, so as to alkoxylate and/or aryloxylate A) the siloxane compound
Implementation Method 2
heating a mixture comprising: A) a siloxane compound, B) a carbonate compound, and C) a basic compound catalyst
Data Source
AI summary
Provided is a method for producing a silane compound, which does not produce corrosive substances such as acids, does not use organic solvents and which contributes to a reduction in environmental load. This method for producing a silane compound has D) a siloxane decomposition step for heating a mixture containing: a siloxane compound A), which is a cyclic siloxane compound A-1) represented by formula (1), a linear siloxane compound A-2) represented by formula (2) and/or a silsesquioxane compound that is represented by formula (3) and has a siloxane bond as a main chain skeleton; a carbonate compound B) including at least one of a diaryl carbonate, a dialkyl carbonate and a monoalkylmonoaryl carbonate; and a basic compound catalyst C). The step D) further includes subjecting the siloxane compound A) to alkoxylation and/or aryloxylation. (In the formulae, R1 to R5, X, n, m and pare as described in the description of the present application.) [R5SiO1.5]p (3)