Reduced Template Zeolite Beta Catalyst Etherification Selectivity
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Solution Overview
Problem
Current methods for producing monoalkyl ethers often result in low selectivity and high dialkyl ether production, which can negatively impact surfactant properties, necessitating improved catalysts and processes for etherification.
Innovation Solution
Reducing the template content of a zeolite beta catalyst through calcination to create a reduced template zeolite catalyst, which is then used to contact olefins and (poly)alkylene glycols, enhancing monoalkyl ether selectivity and reducing dialkyl ether formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional zeolite catalysts are used for etherification, then the reaction can proceed, but monoalkyl ether selectivity is low and dialkyl ether production is high
Solution Approach 1:
The patent applies parameter changes by modifying the template content parameter of the zeolite catalyst through controlled calcination. By adjusting calcination conditions (temperature, time, atmosphere) to maintain 3-15 weight percent template content, the catalyst's electronic and geometric properties are optimized to favor monoalkyl ether formation while suppressing dialkyl ether production, directly resolving the selectivity issue.
Solution Approach 2:
The patent applies local quality by creating non-uniform template distribution within the zeolite structure. The reduced template content (3-15 wt%) is strategically maintained in specific regions of the catalyst pores and framework, creating localized areas with enhanced acid strength and different pore accessibility that selectively promote monoalkyl ether formation over dialkyl ether formation.
2Stability of the object's composition
If templates are completely removed from zeolite catalyst, then catalyst structure is optimized, but monoalkyl ether selectivity decreases
Solution Approach 1:
The patent applies partial action by performing incomplete template removal rather than complete removal. By maintaining 3-15 weight percent template content through controlled calcination, the catalyst retains just enough template to preserve structural stability and promote monoalkyl ether selectivity, while removing sufficient template to prevent excessive dialkyl ether formation. This partial action optimizes the balance between structure stability and product selectivity.
3Quantity of substance
If calcination temperature is increased to remove templates, then template content decreases, but catalyst structure may deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the calcination temperature parameter to achieve the desired template content while preserving catalyst structure. By conducting calcination at controlled temperatures that promote template removal to 3-15 wt% while maintaining framework integrity, the process achieves both template reduction and structural stability. The specific temperature range and calcination time are adjusted to balance template removal with structure preservation.
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 method achieves greater monoalkyl ether selectivity and lesser dialkyl ether selectivity, improving surfactant properties and production efficiency by maintaining 3-15 weight percent templates post-calcination, thereby optimizing etherification outcomes.
Implementation Method 1
contacting the reduced template zeolite catalyst with an olefin and an alcohol to produce a monoalkyl ether
Implementation Method 2
reducing templates of a zeolite catalyst to provide a reduced template zeolite catalyst having from 3 to 15 weight percent of templates maintained following calcination of the zeolite catalyst
Data Source
AI summary
Embodiments of the present disclosure are directed towards methods of etherification including reducing templates of a zeolite catalyst to provide a reduced template zeolite catalyst having from 3 to 15 weight percent weight percent of templates maintained following calcination of zeolite catalyst; and contacting the reduced template zeolite catalyst with an olefin and an alcohol to produce a monoalkyl ether.