Isomerization Catalyst Production via Hydrothermal Synthesis
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Solution Overview
Problem
Conventional isomerization catalysts and propene production processes are inefficient, failing to convert nearly 25% of butenes and resulting in a low propene yield, which cannot meet the growing demand for propene.
Innovation Solution
The development of an isomerization catalyst produced through hydrothermal synthesis of magnesium oxide, using a catalyst precursor solution with magnesium nitrate, a hydrolyzing agent, and polyethylene glycol, followed by calcination, which enhances thermal stability and catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional isomerization catalysts are used, then the process is simple, but the conversion rate of butenes is low and propene yield is small
Solution Approach 1:
The patent applies preliminary action by pre-synthesizing magnesium oxide nanoparticles with controlled size and morphology before using them as catalysts. The hydrothermal synthesis method prepares the catalyst precursor with specific properties (particle size, surface area) in advance, which then enables high conversion rates in the isomerization reaction. This preliminary preparation of catalysts with optimized properties resolves the contradiction between achieving high productivity and managing device complexity.
Solution Approach 2:
The patent employs parameter changes by systematically varying synthesis parameters (temperature, time, precursor concentration, pH) to optimize catalyst properties. By changing these parameters during hydrothermal synthesis, the patent achieves catalysts with enhanced surface area and controlled particle size, which directly improve butene conversion rates while maintaining a manageable preparation process.
2Manufacturing precision
If conventional isomerization catalysts are used, then the process is straightforward, but the propene selectivity is low
Solution Approach 1:
The patent applies local quality by creating magnesium oxide catalysts with specific local structural features - particularly controlled particle size distribution and surface morphology. The hydrothermal synthesis produces nanoparticles with uniform size and high surface area, creating localized active sites that enhance propene selectivity. This local optimization of catalyst structure resolves the contradiction between achieving high manufacturing precision (selectivity) and process complexity.
Solution Approach 2:
The patent uses composite materials by combining magnesium oxide with specific surface treatments and structural modifications. The catalyst is not pure MgO but a composite structure with enhanced surface properties from the hydrothermal synthesis process, including controlled porosity and surface area. This composite approach improves propene selectivity while keeping the synthesis process manageable.
3Reliability
If conventional catalysts are used, then the operation is simple, but the catalyst deactivates quickly at high temperatures
Solution Approach 1:
The patent applies preliminary action by pre-stabilizing the catalyst structure through hydrothermal synthesis and calcination before use. The catalyst undergoes preliminary thermal treatment and structural organization that creates a stable framework resistant to deactivation. This preliminary structuring resolves the contradiction between achieving high reliability (thermal stability) and managing preparation complexity.
Solution Approach 2:
The patent employs parameter changes by optimizing calcination temperature and holding time to achieve the desired thermal stability. By carefully controlling these parameters, the catalyst develops a stable crystalline structure that resists deactivation at high reaction temperatures. This parameter optimization resolves the contradiction between reliability and preparation complexity.
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
The new isomerization catalyst increases the conversion rate of butenes and propene yield, offering improved efficiency and selectivity in propene production from butene-containing feedstocks.
Implementation Method 1
a catalyst precursor solution comprising at least a magnesium precursor, a hydrolyzing agent, and polyethylene glycol
Implementation Method 2
hydrothermally treating the catalyst precursor solution to produce a magnesium oxide precipitant
Data Source
AI summary
Methods of producing an isomerization catalyst include preparing a catalyst precursor solution, hydrothermally treating the catalyst precursor solution to produce a magnesium oxide precipitant, and calcining the magnesium oxide precipitant to produce the isomerization catalyst. The catalyst precursor solution includes at least a magnesium precursor, a hydrolyzing agent, and polyethylene glycol. Methods of producing propene from a butene-containing feedstock with the isomerization catalyst and a metathesis catalyst are also disclosed.