Alpha Olefin Isomerization with MWW Catalysts for Low Pour Point
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Solution Overview
Problem
Existing methods for isomerizing alpha olefins to internal olefins face challenges in achieving high conversion with controlled branched olefin formation, particularly for C16-C18 alpha olefins, while maintaining a low pour point and biodegradability.
Innovation Solution
Employing molecular sieve catalysts of the MCM-22 family for isomerization under mild conditions, specifically at low temperatures, to control branched olefin formation and enhance selectivity to internal olefins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high conversion of alpha olefins to internal olefins is achieved, then pour point decreases, but branched olefin formation increases which reduces biodegradability
Solution Approach 1:
The patent applies parameter changes by optimizing reaction temperature, pressure, and catalyst composition to achieve high conversion while controlling branched olefin formation. Specifically, the patent uses a catalyst system with controlled acid strength and pore structure that selectively promotes isomerization to internal olefins while minimizing branching reactions, thus resolving the contradiction between lowering pour point and maintaining biodegradability.
Solution Approach 2:
The patent employs a catalyst as an intermediary substance that mediates the isomerization reaction. The catalyst system (typically a metal complex with specific ligands) facilitates the conversion of alpha olefins to internal olefins through a controlled mechanism that prevents excessive branched olefin formation, thereby enabling simultaneous achievement of low pour point and high biodegradability.
2Productivity
If conventional isomerization methods are used, then high conversion can be achieved, but process conditions become harsh and branched olefin formation is uncontrolled
Solution Approach 1:
The patent applies parameter changes by developing a catalyst system that operates under mild conditions (lower temperature and pressure) while maintaining high conversion. The catalyst design allows the reaction to proceed efficiently at moderate temperatures, avoiding harsh process conditions, yet still achieves the desired high conversion of alpha olefins to internal olefins with controlled selectivity.
3Temperature
If branched olefin formation is increased to lower pour point, then low temperature performance improves, but biodegradability decreases
Solution Approach 1:
The patent applies local quality by creating a catalyst with specific local properties (acid sites, pore structure, metal distribution) that are optimized for selective isomerization. The catalyst has localized active sites that promote the formation of linear internal olefins while suppressing the formation of branched olefins, thus achieving low pour point through controlled isomerization without compromising biodegradability.
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 achieves high conversion of alpha olefins to internal olefins with minimized branched olefin content, maintaining low pour point and biodegradability, suitable for applications in drilling fluids and paper sizing agents.
Implementation Method 1
employing molecular sieve catalysts of the MCM-22 family in the isomerization of C16-C18 alpha olefins
Data Source
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AI summary
Processes are described for isomerizing one or more C14-C24 alpha olefins to produce an isomerization mixture comprising one or more C14-C24 internal olefins comprising contacting an olefinic feed comprising the one or more C14-C24 alpha olefins with a catalyst under isomerization conditions, wherein the catalyst comprises a microporous crystalline aluminosilicate having an MWW framework. The resulting isomerization mixture typically exhibits a low pour pomt with maintained hiodegradabiiity properties as compared to the olefinic feed, and is particularly useful in drilling fluid and paper sizing compositions.