Olefin Production Catalyst Using Group 8-10 Metals and Bromine
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Solution Overview
Problem
Existing methods for producing olefin from carboxylic acids with a β-hydrogen atom or anhydride face issues of low yield, short catalyst lifetime, and low olefin selectivity due to high reaction temperatures and the need for special solvents and additives.
Innovation Solution
A method using a catalyst containing metal elements from Group 8, 9, and 10 metals, along with bromine, at a specific temperature range of 120° C to 270° C, without requiring special solvents or additives, to selectively produce olefin as an intermediate for surfactants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high reaction temperature is used to enhance catalytic activity, then reaction rate is improved, but catalyst lifetime decreases and olefin selectivity decreases
Solution Approach 1:
The invention changes the chemical composition parameters of the catalyst by incorporating specific metal combinations (Group 8, 9, or 10 metals with copper or zinc) and optimizing the metal content ratios. This allows the catalyst to maintain high activity at lower temperatures (100-250°C) while extending catalyst lifetime and improving olefin selectivity, resolving the contradiction between reaction rate and catalyst durability
2Speed
If high reaction temperature is used to enhance catalytic activity, then reaction rate is improved, but olefin selectivity decreases
Solution Approach 1:
The invention uses composite catalyst materials combining specific metal elements (Group 8, 9, or 10 metals with copper or zinc) in optimized ratios. This composite structure enables the catalyst to achieve high reaction rates at lower temperatures while maintaining high olefin selectivity (85% or more), simultaneously improving both reaction rate and selectivity without the trade-off present in conventional single-metal catalysts
3Manufacturing precision
If special solvents and additives are used to increase olefin selectivity, then olefin selectivity is improved, but device complexity increases
Solution Approach 1:
The invention extracts and eliminates the need for special solvents and additives by incorporating the selectivity-enhancing function directly into the catalyst composition. The multi-metal catalyst system inherently provides high olefin selectivity (85% or more) through its chemical structure, removing the requirement for additional process components and simplifying the overall reaction system
4Device complexity
If conventional catalysts are used, then process simplicity is maintained, but olefin yield decreases
Solution Approach 1:
The invention optimizes critical parameters including metal composition (Group 8, 9, or 10 metal combined with copper or zinc), metal content ratios (0.1-10 wt% for Group 8-10 metals, 0.1-5 wt% for copper/zinc), and reaction temperature (100-250°C). These parameter changes achieve high olefin yields (70% or more) while maintaining process simplicity through a straightforward one-pot reaction without complex additives or multi-step procedures
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 method achieves high yield and selectivity of olefin at lower temperatures without the need for additional solvents or additives, enhancing catalyst stability and reaction efficiency.
Implementation Method 1
a method for producing an olefin from a carboxylic acid having a β-hydrogen atom or an anhydride thereof in the presence of a catalyst, wherein the catalyst contains at least one metal element selected from Group 8 metals, Group 9 metals and Group 10 metals and bromine element
Data Source
AI summary
The present invention provides a method for producing an olefin from a carboxylic acid having a β-hydrogen atom or an anhydride thereof in the presene of a catalyst containing at least one metal element selected from metals of Group 8, Group 9 and Group 10 and bromine element at a reaction temperature of 120° C. to 270° C.