Nitrile Neutralization of Halogenated Olefin Dimerization Catalysts
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Solution Overview
Problem
Existing processes for neutralizing catalytic systems used in olefin dimerization or oligomerization, particularly those involving halogenated derivatives, pose safety risks due to the use of toxic and hazardous substances like ammonia or amines, which can lead to contamination of olefin products with harmful halogenated compounds.
Innovation Solution
A process involving contact of the reaction effluent with a nitrile compound, such as acetonitrile, to effectively neutralize the catalytic system and prevent the formation of chlorine-containing organic products, thereby eliminating halogen contamination from the olefins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ammonia or amines are used to neutralize the catalytic system, then the neutralization efficiency is improved, but safety risks increase due to toxicity and gaseous state of these substances
Solution Approach 1:
The patent replaces toxic ammonia and amines with nitrile compounds that are less hazardous and can be easily handled. The nitrile compound serves as a disposable neutralizing agent that reacts with the catalyst to form inactive complexes, eliminating the need for continuous handling of toxic gaseous substances while maintaining effective neutralization.
Solution Approach 2:
The patent changes the chemical nature of the neutralizing agent from ammonia/amines to nitrile compounds, altering the chemical parameters of the neutralization process. This substitution changes the reaction mechanism and products, reducing toxicity and safety risks while preserving neutralization effectiveness.
2Productivity
If halogenated derivatives are used in the catalytic system for olefin dimerization, then the catalytic activity is improved, but contamination of olefin products with halogenated compounds increases
Solution Approach 1:
The nitrile compound acts as an intermediary substance that mediates between the halogenated catalyst and the olefin product. It preferentially reacts with the halogenated derivative to form a neutralized complex, preventing direct interaction between the catalyst and olefin that would lead to halogenated byproducts, thus protecting the product purity.
Solution Approach 2:
The patent converts the potentially harmful interaction between halogenated catalyst and olefin into a beneficial process by introducing the nitrile compound. The nitrile compound reacts with the halogenated derivative to form inactive complexes, transforming the harmful catalytic activity into a controlled neutralization reaction that prevents contamination while maintaining process 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
The use of nitrile compounds significantly reduces halogen contamination in olefin products, enhancing safety and product purity by preventing secondary reactions that form harmful halogenated compounds, making the process safer and more efficient.
Implementation Method 1
contact of the reaction effluent with at least one nitrile compound RC≡N... effectively neutralize the catalytic system... prevent the formation of chlorine-containing organic products
Data Source
AI summary
The invention concerns a process for the neutralization of a catalytic system for the oligomerization of olefins, said catalytic system comprising at least one halogenated derivative, characterized in that the reaction effluent is brought into contact with at least one nitrile compound.