Linear Alpha Olefin Production via Simultaneous Hydrogenolysis and Dehydration
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Solution Overview
Problem
Current methods for producing linear alpha olefins and central olefins, such as ethylene oligomerization, olefin metathesis, and the Fischer-Tropsch process, are cost-intensive due to expensive feedstocks and complex processes, requiring extensive purification and leading to high capital and operating expenditures.
Innovation Solution
A novel process involving controlled hydrogenolysis, hydrogenation, and dehydration reactions simultaneously over a metal-impregnated acidic support catalyst system using fatty acids, triglycerides, and esters as feedstock, which are inexpensive and obtained from natural sources or byproducts, allowing for the production of targeted alpha-olefins in a single step and simple process configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If ethylene oligomerization route is used for alpha olefin production, then linear alpha olefins can be produced, but the process becomes complex and requires extensive fractionation
Solution Approach 1:
The patent combines multiple reaction functions (oligomerization, isomerization, and fractionation) into a single catalytic system. The zeolite catalyst performs both oligomerization of ethylene and in-situ isomerization of internal olefins to alpha-olefins, eliminating the need for separate isomerization units and reducing overall process complexity.
Solution Approach 2:
The zeolite catalyst acts as an intermediary that facilitates the conversion of internal olefins to alpha-olefins through shape-selective catalysis. The catalyst's porous structure and acid sites enable isomerization reactions to occur within the reactor, mediating the transformation without requiring additional processing steps.
2Manufacturing precision
If extensive fractionation is performed to separate alpha olefins with different carbon numbers, then product purity is improved, but capital expenditure increases
Solution Approach 1:
The patent performs isomerization of internal olefins to alpha-olefins as a preliminary action within the reactor itself, before the products enter the fractionation system. This pre-treatment step reduces the complexity of downstream separation by converting unwanted internal olefins into desired alpha-olefins in-situ, simplifying the fractionation requirements.
3Adaptability or versatility
If metathesis route is used for alpha olefin production, then olefins can be converted, but catalyst degradation products destabilize olefin products
Solution Approach 1:
The patent extracts or removes the problematic metathesis catalyst system and replaces it with an oligomerization catalyst system using zeolite. This eliminates the source of catalyst degradation products that destabilize olefin products, while maintaining the capability to produce alpha-olefins through an alternative reaction pathway.
4Manufacturing precision
If homogeneous catalysts are used for metathesis process, then catalyst activity and selectivity are improved, but catalyst recovery becomes necessary
Solution Approach 1:
The patent employs a heterogeneous zeolite catalyst that can be easily separated from the product stream through filtration or decantation, eliminating the need for complex catalyst recovery systems. The catalyst, while having finite lifetime, can be regenerated or replaced without sophisticated recovery equipment, making the process more economically viable.
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 reduces production costs and simplifies the process, enabling the production of targeted alpha-olefins with lower capital and operating expenditures while minimizing the need for elaborate purification steps.
Implementation Method 1
controlled hydrogenolysis, hydrogenation and dehydration reactions simultaneously over hydro-processing catalyst system
Implementation Method 2
controlled hydrogenolysis, hydrogenation and dehydration reactions simultaneously over hydro-processing catalyst system
Implementation Method 3
controlled hydrogenolysis, hydrogenation and dehydration reactions simultaneously over hydro-processing catalyst system
Data Source
AI summary
The present invention provides a novel route for synthesis and production of linear alpha olefins (LAO) and central olefins from the feedstock comprising fatty acids, triglycerides and esters of fatty acids, and mixture thereof through controlled hydrogenolysis, hydrogenation and dehydration reactions simultaneously in a hydro processing reactor containing a catalyst system having dual site—a metallic site for hydrogenation/reduction reaction under hydrogen environment, and an acidic site for conversion of alcohol to olefin via E1 or E2 reaction mechanism.