Ionic Liquid Alkylation Process for Middle Distillate Control
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Solution Overview
Problem
Current processes for producing middle distillates and low volatility gasoline blending components face challenges in achieving optimal carbon number distribution, branching, and volatility levels, which affect their performance and compatibility with fuel standards.
Innovation Solution
A process using an ionic liquid catalyst, such as chloroaluminate ionic liquids, for alkylation of isobutane with butene or olefins, allowing for the production of middle distillates with controlled carbon number distribution and branching, and low volatility gasoline blending components with specific boiling ranges and Reid Vapor Pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional alkylation processes are used to produce middle distillates and gasoline blending components, then production capacity is maintained, but optimal carbon number distribution, branching, and volatility levels cannot be achieved
Solution Approach 1:
The patent employs parameter changes by adjusting the ionic liquid catalyst composition (specifically the ratio of alkylpyridinium chloride to aluminum chloride), reaction temperature, and halide additive levels to optimize the alkylation process. These parameter adjustments enable precise control over carbon number distribution and product properties while maintaining high production capacity, resolving the contradiction between manufacturing precision and productivity
2Manufacturing precision
If conventional catalysts are used for alkylation, then process simplicity is maintained, but optimal branching and volatility control cannot be achieved
Solution Approach 1:
The patent uses composite ionic liquid catalysts formed by combining alkylpyridinium chloride with aluminum chloride and halide additives. This composite catalyst system enables precise control over branching and volatility of the alkylation products. The complex catalyst structure provides multiple active sites that facilitate selective carbon-carbon bond formation, achieving optimal product properties despite the increased catalyst complexity
3Manufacturing precision
If halide containing additives are not adjusted during alkylation, then process simplicity is maintained, but optimal product properties and fuel standard compliance cannot be achieved
Solution Approach 1:
The patent implements feedback control by monitoring product properties (carbon number distribution, branching, volatility) and adjusting halide additive levels accordingly. This closed-loop approach ensures that the alkylation process continuously produces products meeting specific fuel standards while maintaining optimal performance characteristics. The feedback mechanism allows dynamic adjustment of process parameters to achieve precise product specifications
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 process achieves high yields of middle distillates and low volatility gasoline blending components with desired properties, such as high branching indices, low olefin content, and compliance with Jet A-1 fuel specifications, enhancing their suitability for jet fuel and diesel applications.
Implementation Method 1
A process using an ionic liquid catalyst, such as chloroaluminate ionic liquids, for alkylation of isobutane with butene or olefins
Data Source
AI summary
A process for producing a gasoline blending component and a middle distillate, comprising adjusting a level of a halide containing additive provided to an ionic liquid alkylation reactor to shift selectivity towards heavier products, and recovering a low volatility gasoline blending component and the middle distillate.