Normal Alpha Olefin Synthesis via Dehydroformylation
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Solution Overview
Problem
Current methods for synthesizing specific carbon number normal alpha olefins are inefficient and produce significant byproducts, such as alkanes and internal olefins, limiting their production selectivity and yield.
Innovation Solution
Catalyst compositions comprising transition metal compounds, phosphines, and heteroatomic acids or their derivatives are used in oxidative dehydroxymethylation and dehydroformylation processes to produce normal alpha olefins from alcohols, diols, and aldehydes, minimizing byproduct formation through specific reaction pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current synthesis methods are used to produce normal alpha olefins, then production can be achieved, but significant byproducts (alkanes and internal olefins) are formed reducing selectivity and yield
Solution Approach 1:
The patent changes the chemical parameters of the reaction system by introducing a catalyst composition with specific components (transition metal compound, phosphine, heteroatomic acid) and controlling reaction conditions (temperature 50-150°C, pressure 1-50 atm, oxygen partial pressure 0.1-20 atm) to achieve high selectivity for normal alpha olefins while minimizing byproduct formation
Solution Approach 2:
The patent uses an acceptor compound as an intermediary substance that interacts with the reaction system to suppress byproduct formation. The acceptor selectively reacts with intermediate species to direct the reaction pathway toward the desired normal alpha olefin product, reducing the formation of alkanes and internal olefins
2Productivity
If current synthesis methods are used, then normal alpha olefins can be produced, but the yield is limited due to byproduct formation
Solution Approach 1:
The patent optimizes reaction parameters including temperature (50-150°C), pressure (1-50 atm), oxygen partial pressure (0.1-20 atm), and catalyst composition ratios to maximize the yield of normal alpha olefins. These parameter changes drive the reaction toward higher productivity by suppressing competing side reactions that form byproducts
Solution Approach 2:
The acceptor compound serves as a mediator that enhances yield by selectively consuming reactive intermediates that would otherwise lead to byproduct formation. This intermediary approach redirects the reaction pathway to favor the desired product, increasing overall yield
3Productivity
If current synthesis methods are used, then production can proceed, but efficiency is reduced due to significant byproduct formation
Solution Approach 1:
The patent improves efficiency by optimizing reaction conditions (temperature, pressure, oxygen concentration) and catalyst composition to minimize energy waste and maximize product formation rate. The controlled parameters ensure rapid conversion of reactants to desired products while suppressing byproduct pathways
Solution Approach 2:
The acceptor acts as an efficiency-enhancing intermediary by selectively interacting with reaction intermediates to prevent their conversion to byproducts. This mediator approach streamlines the reaction pathway, improving overall process efficiency by reducing material and energy losses
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
These processes selectively produce normal alpha olefins with high yield while reducing the formation of byproducts like alkanes and internal olefins, improving the efficiency and selectivity of the synthesis.
Implementation Method 1
Catalyst compositions that can be used in oxidative dehydroxymethylation and oxidative dehydroformylation processes to produce normal alpha olefins are disclosed herein. Such catalyst compositions can comprise a transition metal compound, a phosphine, and a heteroatomic acid or heteroatomic acid derivative
Implementation Method 2
A dehydroxymethylation process consistent with aspects of this invention can comprise contacting a saturated linear C3-C36 hydrocarbon primary alcohol with the catalyst composition to form a C2-C35 normal alpha olefin
Implementation Method 3
In yet another aspect, a dehydroformylation process is disclosed, and the dehydroformylation process can comprise contacting a saturated linear C3-C36 hydrocarbon aldehyde with the catalyst composition to form a C2-C35 normal alpha olefin
Data Source
AI summary
The present invention discloses processes for producing normal alpha olefins, such as 1-hexene, 1-octene, 1-decene, and 1-dodecene in a multistep synthesis scheme from another normal alpha olefin. Also disclosed are reactions for converting aldehydes, primary alcohols, and terminal vicinal diols into normal alpha olefins.