Magnesium Oxide Isomerization Catalyst Synthesis
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Solution Overview
Problem
Conventional isomerization catalysts for converting 2-butene to 1-butene are inefficient, resulting in low conversion rates and yields of 1-butene, which cannot meet the growing demand for this chemical in polyethylene production.
Innovation Solution
A method of producing an isomerization catalyst through hydrothermal synthesis of magnesium oxide using a catalyst precursor solution containing a magnesium precursor, a hydrolyzing agent, and cetrimonium bromide, followed by calcination to enhance thermal stability and catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional isomerization catalysts are used, then the isomerization process can be performed, but the conversion rate of 2-butene and yield of 1-butene are low
Solution Approach 1:
The patent applies parameter changes by modifying the synthesis conditions of magnesium oxide catalysts, specifically using hydrothermal treatment at elevated temperatures and pressures followed by calcination at different temperatures (400-600°C). These parameter changes produce catalysts with controlled surface areas (50-200 m²/g) and pore structures that significantly improve 2-butene conversion rates and 1-butene yields compared to conventional catalysts
Solution Approach 2:
The patent creates composite catalyst systems by combining magnesium oxide with other materials or modifying its surface properties through hydrothermal treatment and calcination. The resulting composite structure with optimized surface area and pore distribution enhances both catalytic activity and thermal stability, resolving the contradiction between productivity and reliability
2Productivity
If conventional isomerization catalysts are used, then the process can operate, but the catalytic activity is insufficient to meet growing demand
Solution Approach 1:
The patent applies preliminary action by performing hydrothermal treatment on magnesium oxide precursors before final calcination. This preliminary step creates a pre-treated catalyst structure with optimized surface properties that enhances subsequent catalytic performance. The pre-treatment involves heating in sealed vessels at 100-250°C for 1-24 hours, which prepares the catalyst for higher activity without requiring overly complex synthesis equipment
Solution Approach 2:
The patent replaces complex mechanical catalyst preparation methods with hydrothermal and thermal treatment processes. Instead of using complex mechanical mixing, pressing, or shaping operations, the invention uses solution-based hydrothermal synthesis followed by simple calcination, achieving high catalytic activity through chemical and thermal processes rather than mechanical complexity
3Reliability
If conventional catalysts are used, then the process is simple, but thermal stability is insufficient at isomerization temperatures
Solution Approach 1:
The patent exploits phase transitions by subjecting magnesium oxide precursors to hydrothermal treatment (liquid phase at elevated T and P) followed by calcination (solid phase formation at high temperature). This sequence of phase transitions transforms the precursor into a thermally stable catalyst with optimized crystal structure and surface properties, achieving high thermal stability through controlled phase changes rather than complex manufacturing
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 resulting isomerization catalyst exhibits increased thermal stability and catalytic activity, leading to higher conversion rates and yields of 1-butene, improving the efficiency of the isomerization process.
Implementation Method 1
preparing a catalyst precursor solution comprising at least a magnesium precursor, a hydrolyzing agent, and cetrimonium bromide
Implementation Method 2
hydrothermally treating the catalyst precursor solution to produce a magnesium oxide precipitant
Implementation Method 3
preparing a catalyst precursor solution comprising at least a magnesium precursor, a hydrolyzing agent, and cetrimonium bromide
Implementation Method 4
calcining the magnesium oxide precipitant to produce the isomerization catalyst
Implementation Method 5
calcining the magnesium oxide precipitant to produce the isomerization catalyst
Implementation Method 6
contacting the 2-butene-containing feedstock with an isomerization catalyst to produce an isomerization reaction effluent comprising 1-butene
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 cetrimonium bromide. Methods of producing 1-butene from a 2-butene-containing feedstock with the isomerization catalyst are also disclosed.