Basic Catalyst Isomerizing Normal Butene to Isobutene
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Solution Overview
Problem
Current methods for isomerizing normal butene to isobutene result in significant generation of by-products, making it difficult to achieve a high yield of isobutene and requiring costly separation processes.
Innovation Solution
A method involving the use of a basic catalyst, such as a solid basic catalyst or a catalyst with a basic metal supported on a solid acid catalyst, specifically alumina or zeolite, to isomerize normal butene at a temperature range of 25° C to 249° C, which suppresses by-product generation and enhances isobutene yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a zeolite catalyst is used for isomerizing normal butene to isobutene, then the reaction can proceed, but by-products having 3 or 5 carbon atoms are generated in considerable proportion
Solution Approach 1:
The invention changes the fundamental parameter of catalyst basicity from acidic (zeolite) to basic (alumina or metal-supported). This parameter change fundamentally alters the reaction pathway, suppressing carbon skeleton rearrangement reactions that produce C3 and C5 by-products while maintaining isobutene formation through direct isomerization of normal butene.
Solution Approach 2:
The invention converts the previously harmful acidic catalysis that caused unwanted by-product formation into beneficial basic catalysis. The basic catalyst sites selectively promote the desired isomerization reaction while inherently suppressing the harmful carbon skeleton rearrangement reactions that occurred with acidic zeolite catalysts.
2Productivity
If conventional isomerization methods are used, then isobutene can be produced, but separation of unreactive normal butene becomes difficult due to by-product generation
Solution Approach 1:
The invention eliminates the harmful by-products that complicated separation processes. By using a basic catalyst, the reaction produces only isobutene and unreactive normal butene, eliminating the need for complex separation systems to remove C3 and C5 by-products. The simplified product mixture enables straightforward separation and recycling of unreactive normal butene.
3Productivity
If by-products are generated during isomerization, then the yield of isobutene cannot achieve predetermined yield, but improving the catalyst may increase cost
Solution Approach 1:
The invention achieves predetermined high isobutene yield by changing the catalyst parameter from acidic to basic. This parameter change enables the reaction to proceed with high selectivity to isobutene, achieving yields of 90% or more while avoiding the need for expensive complex separation processes required to remove by-products.
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 a high yield of isobutene with reduced by-product formation, enabling cost-effective isobutene generation and theoretical yield of 100% when unreactive normal butene is reused, contributing to carbon neutrality by utilizing carbon dioxide from exhaust gases.
Implementation Method 1
a catalyst for promoting the isomerization reaction of isomerizing normal butene to generate isobutene
Data Source
AI summary
A method for generating isobutene, for isomerizing normal butene to isobutene, in which generation of by-products can be infinitely suppressed, and a high yield of isobutene can be achieved. The method for generating isobutene includes isomerizing normal butene to isobutene, wherein the normal butene is brought into contact with a basic catalyst in isomerizing. A reaction temperature in isomerizing is preferably in a range from 25° C. to 249° C.