Tertiary Butyl Alcohol Reactor Segmentation
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Solution Overview
Problem
The low reaction rate and conversion of isobutylene to tertiary butyl alcohol in hydration reactions due to low mutual solubility of water and hydrocarbons, leading to two-liquid phases and equilibrium restrictions in existing methods.
Innovation Solution
A method involving a reactor with at least two vessels in series, where the reaction fluid forms a two-liquid phase in the downstream vessel and a homogeneous phase in upstream vessels, using a cation exchange resin and maintaining a reaction temperature of 70° C. or lower, with partial tertiary butyl alcohol removal and recirculation to enhance conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a homogeneous liquid phase is used for hydration reaction, then reaction rate is improved, but conversion is restricted by equilibrium
Solution Approach 1:
The reaction system is segmented into multiple reactor vessels in series, where each vessel operates under different phase conditions. Upstream vessels maintain homogeneous liquid phase for high reaction rate, while downstream vessels create two-liquid phase to overcome equilibrium restrictions and improve conversion.
Solution Approach 2:
The invention changes the physical state parameter of the reaction fluid from homogeneous liquid phase to two-liquid phase in downstream reactor vessels. This phase change allows the system to overcome equilibrium limitations while maintaining acceptable reaction rates through the multi-vessel configuration.
2Productivity
If two-liquid phase is used for hydration reaction, then conversion is improved, but reaction rate decreases
Solution Approach 1:
The reaction process is divided into multiple stages across series-connected reactor vessels. Early vessels operate in homogeneous liquid phase for fast reaction, while later vessels operate in two-liquid phase for high conversion, effectively segmenting the performance requirements across different spatial locations.
Solution Approach 2:
Multiple reactor vessels are connected in series to maintain continuous reaction flow. The effluent from one vessel becomes the feed for the next, ensuring continuous useful action throughout the system while allowing different phase conditions to operate simultaneously in different vessels.
3Ease of operation
If TBA is added to raw materials to make homogeneous liquid phase, then reaction can proceed, but conversion is restricted by equilibrium
Solution Approach 1:
Instead of adding TBA to all vessels, the invention segments the addition of TBA to specific downstream vessels where it is needed to create two-liquid phase conditions. This localized approach avoids the equilibrium restriction problem while maintaining operational feasibility in vessels where homogeneous phase is beneficial.
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 achieves higher conversion rates and effective production of tertiary butyl alcohol by leveraging the equilibrium constant differences between two-liquid and homogeneous phases.
Implementation Method 1
hydration reaction of isobutylene and water in the presence of a cation exchange resin
Implementation Method 2
making a fluid in a reactor vessel at the most downstream side form a two-liquid phase
Data Source
AI summary
Disclosed is a method for producing tertiary butyl alcohol through hydration reaction of isobutylene and water in the presence of a cation exchange resin by using a reactor having at least two reactor vessels provided in series. The method is characterized in that a fluid in a reactor vessel at the most downstream side forms a two-liquid phase and the reaction temperature of the reactor vessel is kept at 70° C. or lower, and a fluid in at least one reactor vessel other than the one at the most downstream side forms a homogeneous phase.