ZSM-48 Catalyst Isomerization for Low Pour Point Olefins
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Solution Overview
Problem
There is a need for highly active and selective methods to isomerize alpha olefins to internal olefins at high conversion with controlled branched olefin formation, while maintaining biodegradability and reducing pour point in drilling fluids.
Innovation Solution
Employing highly acidic medium pore molecular sieve catalysts, specifically microporous crystalline aluminosilicates from the ZSM-48 group, under mild process conditions at low temperatures to achieve efficient isomerization of C4-C24 alpha olefins to internal olefins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional isomerization methods are used to convert alpha olefins to internal olefins, then conversion rates improve, but branched olefin formation increases reducing biodegradability
Solution Approach 1:
The patent employs a microporous crystalline aluminosilicate from the ZSM-48 group with a SiO2/Al2O3 molar ratio of less than or equal to 100. The specific pore structure and acidity of this porous material enable high conversion of alpha olefins to internal olefins while suppressing the formation of branched olefins, thus resolving the contradiction between productivity and harmful byproduct formation.
Solution Approach 2:
The patent utilizes the specific parameter of SiO2/Al2O3 molar ratio (less than or equal to 100) to optimize the catalyst's acidity and pore structure. This parameter change in the catalyst composition enables selective isomerization that achieves high conversion while minimizing branched olefin formation, addressing the technical contradiction.
2Productivity
If high conversion is achieved through conventional catalysts, then internal olefin production improves, but process temperature increases raising energy consumption
Solution Approach 1:
The microporous crystalline aluminosilicate from the ZSM-48 group provides high catalytic activity at low temperatures due to its specific pore structure and acidity. This enables the process to achieve high internal olefin production without increasing energy consumption, as the catalyst facilitates the reaction under mild conditions.
Solution Approach 2:
The patent uses a composite microporous crystalline aluminosilicate material with specific SiO2/Al2O3 ratio that combines the benefits of high surface area, appropriate pore size, and optimized acidity. This composite material achieves high productivity at low energy input by facilitating the isomerization reaction under mild conditions.
3Temperature
If branched olefin formation is increased to reduce pour point, then fluidity improves, but biodegradability decreases
Solution Approach 1:
The microporous crystalline aluminosilicate from the ZSM-48 group with SiO2/Al2O3 ratio of less than or equal to 100 provides selective catalysis that achieves the desired pour point reduction through controlled isomerization while minimizing excessive branched olefin formation. This maintains biodegradability by limiting harmful branching.
Solution Approach 2:
By optimizing the SiO2/Al2O3 molar ratio parameter of the catalyst, the process achieves precise control over the isomerization reaction. This parameter optimization enables sufficient pour point reduction while maintaining biodegradability by preventing excessive branched olefin formation.
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 allows for high single-pass conversion rates and selectivity to desired internal olefin products, reducing energy usage and improving process reliability, while maintaining biodegradability and lowering pour points of the isomerization mixture.
Implementation Method 1
contacting an olefinic feed comprising the one or more C 4 -C 24 alpha olefins with a catalyst under isomerization conditions, wherein the catalyst comprises a microporous crystalline aluminosilicate from the ZSM-48 group
Data Source
AI summary
Processes are described for isomerizing one or more C4-C24 alpha olefins to produce an isomerization mixture comprising one or more C4-C24 internal olefins comprising contacting an olefinic feed comprising the one or more C4-C24 alpha olefins with a catalyst under isomerization conditions, wherein the catalyst comprises a microporous crystalline alummosilicate selected from the group consisting of ZSM-5, ZSM-23, ZSM-35, ZSM-11, ZSM-12, ZSM-48, ZSM-57, and mixtures or combinations thereof, and wherein the microporous crystalline aluminosilicate has a S1O2/AI2O3 molar ratio of less than or equal to about 100. The resulting isomerization mixture typically exhibits a lower pour point and maintained biodegradability properties as compared to the olefinic feed, and is particularly useful in drilling fluid and paper sizing compositions.