Ionic Compound Antifouling Agent for Olefin Reactors
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Solution Overview
Problem
The olefin oligomerization process faces significant challenges with fouling, which reduces heat efficiency and production efficiency due to the sticking and floating of by-products in the reactor, and existing solutions either incur high costs, degrade polymerization activity, or provide insufficient fouling suppression.
Innovation Solution
Introducing an antifouling agent containing an ionic compound, such as inorganic salts or organic salts with specific cations, into the reactor to suppress fouling and enhance catalyst activity, allowing for easy removal of heat and maximizing the production of 1-hexene and 1-octene with high selectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If various embodiments of technologies for suppressing fouling in the reactor are suggested, then fouling suppression effect is improved, but production should be stopped for a long time or polymerization activity is degraded
Solution Approach 1:
The patent introduces an antifouling agent comprising a specific ionic compound as an intermediary substance that mediates between the olefin monomer and the reactor wall. This agent prevents by-products from adhering to the reactor surface without requiring production shutdown or introducing inert gases that would dilute the reaction mixture and reduce polymerization activity.
Solution Approach 2:
The patent specifies precise parameter ranges for the ionic compound concentration (0.001 to 1,000 ppm based on total weight of the medium) to achieve effective fouling suppression while maintaining high polymerization activity. This parameter optimization ensures that the antifouling agent works effectively without degrading reaction efficiency or requiring production shutdown.
2Object-affected harmful factors
If inert gas such as nitrogen and helium is introduced to a reactor together with an olefin monomer, then fouling is suppressed, but a partial pressure of the olefin monomer is decreased to degrade a polymerization activity
Solution Approach 1:
Instead of using inert gases as intermediaries, the patent employs a specific ionic compound that actively participates in preventing fouling without occupying space in the reaction mixture. This mediator prevents by-product adhesion to reactor walls while maintaining full olefin monomer concentration and partial pressure, thus preserving polymerization activity.
3Object-affected harmful factors
If an antifouling agent including a perfluorocarbon group and a hydrophilic group is introduced, then fouling suppression is attempted, but an effect of suppressing fouling is not sufficient
Solution Approach 1:
The patent identifies and specifies critical parameters for effective fouling suppression: the ionic compound must have a cation selected from specific groups (ammonium, phosphonium, pyridinium, imidazolium, imidazolinium, pyrazolium, sulfonium, pyrrolidinium, or piperidinium) and an anion selected from specific groups (halide, pseudohalide, carboxylate, sulfate, phosphate, or hydroxide). The concentration is optimized to 0.001 to 1,000 ppm. These parameter specifications ensure reliable and sufficient fouling suppression效果.
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 ionic compounds effectively minimizes the production of sticking and floating by-products, maintaining thermal conductivity, stabilizing the reaction, and maximizing reaction efficiency while preventing fouling, thus improving workability and productivity.
Implementation Method 1
an antifouling agent comprising an ionic compound... effectively solving process problems such as fouling and plugging
Implementation Method 2
allows easy removal of a heat of reaction by the above-described effect... maintaining thermal conductivity
Implementation Method 3
may maximize a catalyst activity... by oligomerization
Data Source
Figure 1~2
AI summary
The present invention provides a fouling prevention method and a method for olefin oligomerization, wherein in the method for olefin oligomerization, a predetermined anti-fouling agent is added, thereby minimizing the production of sticking byproducts generated during the reaction and fundamentally preventing the fouling of the byproducts, generated during the reaction, on an inner wall of a reactor.