Vapor Phase Catalyst Deactivation Using Boiling Point Differential
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In oligomerization processes, incomplete catalyst deactivation due to incomplete mixing and phase partitioning leads to downstream processing issues, such as catalyst migration and formation of unwanted by-products, which can clog piping and cause processing problems.
Innovation Solution
A method involving a product-receiving vessel where a reaction product stream containing a catalyst composition is contacted with a catalyst-deactivating composition and a diluent, with the diluent having a boiling point at least 5.0°C higher than the catalyst-deactivating composition, to effectively deactivate the catalyst in the vapor phase, using a substoichiometric amount of deactivating composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a catalyst-deactivating composition is introduced to quench the catalyst, then the catalyst activity is reduced, but incomplete mixing and phase partitioning lead to incomplete deactivation and downstream processing problems
Solution Approach 1:
The invention utilizes phase transition by introducing a diluent with a higher boiling point than the catalyst-deactivating composition. This creates a vapor phase environment where the deactivating composition can effectively contact the catalyst. The boiling point difference ensures that the deactivating composition remains in the vapor phase while the diluent condenses, providing continuous deactivation without mixing issues
Solution Approach 2:
The diluent acts as an intermediary substance that facilitates the deactivation process. It carries the catalyst-deactivating composition into the vapor phase and ensures proper contact with the catalyst, while its higher boiling point prevents it from interfering with the deactivation chemistry. The diluent mediates between the deactivating composition and the catalyst system
2Object-generated harmful factors
If the catalyst composition migrates to the vapor phase during solvent evaporation, then further reactions create unwanted by-products, but preventing this migration requires additional process control
Solution Approach 1:
The invention applies preliminary action by introducing the catalyst-deactivating composition and diluent to the vapor phase before the catalyst can migrate and cause harmful reactions. This pre-deactivation approach ensures that the catalyst is neutralized in advance, preventing downstream by-product formation and simplifying process control
Solution Approach 2:
The invention converts the potential harm of catalyst migration into a benefit by utilizing the vapor phase environment. Instead of preventing migration and dealing with liquid-phase mixing issues, the process embraces vapor phase conditions where the deactivating composition can more effectively and uniformly contact the catalyst, turning a problematic phase behavior into an advantageous deactivation mechanism
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 method prevents catalyst migration and subsequent processing issues by ensuring complete deactivation of the catalyst, even with a small amount of deactivating agent, thereby maintaining process efficiency and preventing unwanted by-product formation.
Implementation Method 1
contacting in a vapor phase of the product-receiving vessel at least a portion of the catalyst composition with at least a portion of the catalyst-deactivating composition
Data Source
AI summary
Disclosed herein are methods and apparatus for deactivating a catalyst composition in an reaction product stream. One such method and apparatus contact the catalyst composition with a catalyst-deactivating composition and a diluent in a vapor phase of a product-receiving vessel, wherein the boiling point of the diluent is at least 5.0° C. greater than the boiling point of the catalyst-deactivating composition. Also disclosed are oligomerization systems for producing oligomers.