Oligomerization Catalyst Hydrothermal Treatment for Higher Strength
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing oligomerization catalysts face issues with strength and catalyst performance, particularly in heterogeneously catalyzed processes, necessitating improvements in these properties.
Innovation Solution
A process involving a hydrothermal treatment step before drying and calcining is introduced, where a mixture of amorphous or zeolitic aluminium silicate, a nickel source, and optional binders is subjected to elevated temperatures with controlled water and ammonia levels, followed by higher drying rates and calcining, to enhance catalyst strength and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional drying and calcining processes are used without hydrothermal treatment, then the production process is simpler and faster, but the catalyst strength and performance are insufficient
Solution Approach 1:
The hydrothermal treatment is performed as a preliminary step before drying and calcining. This preliminary action modifies the catalyst precursor structure in advance, creating a more robust framework that withstands subsequent processing and delivers superior catalyst strength in the final product
Solution Approach 2:
The hydrothermal treatment changes the physical and chemical parameters of the catalyst precursor by exposing it to elevated temperature and controlled humidity conditions. This parameter change transforms the amorphous or zeolitic aluminium silicate structure, improving its mechanical strength and catalytic performance without significantly complicating the overall process
2Strength
If conventional drying rates are used, then the drying process is faster and more energy-efficient, but the catalyst performance and strength are compromised
Solution Approach 1:
The hydrothermal treatment performs a preliminary structural modification that strengthens the catalyst framework before the rapid drying process. This preliminary strengthening allows the subsequent fast drying to proceed without compromising the final catalyst strength, as the structure has already been optimized
Solution Approach 2:
The hydrothermal treatment changes the moisture distribution and structural properties of the catalyst precursor, creating conditions that allow for faster drying rates while maintaining or improving catalyst strength. The controlled humidity and temperature parameters during hydrothermal treatment prepare the structure to withstand rapid water removal
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 results in an oligomerization catalyst with significantly improved strength and performance, as evidenced by increased bulk crush strength, reduced abrasion, and better catalytic activity and selectivity in olefin oligomerization reactions.
Implementation Method 1
subjecting the mixture thus produced to a hydrothermal treatment, the hydrothermal treatment taking place at a temperature within a range from 75° C. to 180° C.
Implementation Method 2
drying of the mixture obtained in step b), the drying rate in step c) being higher than in step b)
Implementation Method 3
calcining the mixture dried in step c) to produce the oligomerization catalyst
Data Source
AI summary
A process for producing an oligomerization catalyst includes hydrothermal treatment. An oligomerization catalyst produced by the process is useful for the oligomerization of C2 to C12 olefins.