Halide Control in Alkylation Reactors for Yield Ratio
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Solution Overview
Problem
Existing processes for obtaining a ratio of alkylate gasoline and middle distillate from an alkylation reactor face challenges in efficiently controlling the yield and product composition, particularly due to variations in halide levels, which affect the Bronsted acidity and selectivity of the catalyst.
Innovation Solution
A continuous process involving sampling and real-time adjustment of halide-containing additives in an ionic liquid alkylation reactor to control the operating conditions, ensuring optimal yields of alkylate gasoline and middle distillate by measuring halide levels and adjusting the flow of halide additives within the reactor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If halide levels are not monitored and adjusted, then the process is simpler and requires fewer measurements, but the yield ratio of alkylate gasoline to middle distillate cannot be precisely controlled
Solution Approach 1:
The patent implements a feedback control system where halide levels are continuously measured in the reactor and the measurements are used to adjust halide additive flow rates. This closed-loop feedback mechanism enables precise control of the yield ratio by dynamically responding to actual halide concentrations, resolving the contradiction between measurement simplicity and yield control precision.
Solution Approach 2:
The patent controls the yield ratio by adjusting halide concentration levels as a key process parameter. By monitoring and modifying halide levels through controlled addition of halide-containing additives, the system achieves precise manipulation of product distribution between alkylate gasoline and middle distillate, transforming a static parameter into a dynamic control variable.
2Productivity
If halide-containing additives are adjusted in real-time, then the selectivity and yield of desired products are enhanced, but the process requires continuous measurement and adjustment operations
Solution Approach 1:
The patent employs automated sampling and analysis systems that continuously monitor halide levels without requiring manual intervention. The system self-regulates by automatically adjusting additive flow rates based on measured halide concentrations, reducing operational complexity while maintaining high productivity through continuous optimization of product yield.
Solution Approach 2:
The patent implements continuous monitoring and adjustment operations rather than batch-wise interventions. By maintaining continuous measurement of halide levels and continuous adjustment of additive flow, the system ensures uninterrupted optimization of reaction conditions, maximizing product yield while streamlining operations through an ongoing automated process.
3Reliability
If halide levels are maintained at optimal levels, then the Bronsted acidity and selectivity of the catalyst are optimized, but additional halide-containing additives must be supplied to the reactor
Solution Approach 1:
The patent optimizes catalyst performance by dynamically adjusting halide concentration levels rather than using fixed amounts. By controlling halide levels as a variable parameter, the system maintains optimal Bronsted acidity and selectivity while minimizing excessive additive consumption, resolving the contradiction between catalyst reliability and additive quantity through precise parameter management.
Solution Approach 2:
The patent uses feedback control to supply halide-containing additives only when needed to maintain optimal levels. By continuously measuring halide concentrations and adjusting additive flow rates accordingly, the system ensures reliable catalyst performance while avoiding unnecessary additive consumption, directly addressing the contradiction between maintaining catalyst reliability and minimizing substance usage.
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 approach allows for precise control of the yield ratio of alkylate gasoline to middle distillate, enhancing the selectivity and yield of desired products by maintaining effective halide levels, thereby optimizing the alkylation reaction outcomes.
Implementation Method 1
an ionic liquid catalyst and a reactant mixture comprising an olefin and an isoparaffin
Implementation Method 2
variations in halide levels, which affect the Bronsted acidity and selectivity of the catalyst
Implementation Method 3
measuring halide levels and adjusting the flow of halide additives within the reactor
Data Source
AI summary
A process, comprising:a. taking a sample from a continuous alkylation reactor process;b. measuring a content of a halide in the sample; andc. within 45 minutes from the taking a sample, adjusting a flow of a halide containing additive comprising the halide to control a ratio of a yield of an alkylate gasoline and a yield of a middle distillate. Also a process, comprising:a. taking a sample from an effluent of an alkylation reactor in an alkylation reactor process;b. measuring a content of a halide in the sample; andc. in response to the measured content of the halide, adjusting a flow of a halide containing additive to a predetermined range that has been selected to obtain a ratio of a yield of an alkylate gasoline and a yield of a middle distillate from 0.31 to 4.0 in a product from the alkylation reactor.