Amorphous Calcium Phosphate Catalyst for 1,3-Butadiene Selectivity
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Solution Overview
Problem
Current methods for producing 1,3-butadiene and methyl ethyl ketone from 2,3-butanediol face challenges in achieving high selectivity and catalyst durability, with existing catalysts showing limited efficiency and stability.
Innovation Solution
An amorphous calcium phosphate catalyst is prepared by reacting a phosphoric acid-containing solution with an alkali and a calcium precursor, followed by thermal treatment, to achieve a Ca/P molar ratio of 1.20-1.30, balancing acid and base properties for enhanced catalytic activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If crystalline calcium phosphate catalysts (hydroxyapatite or calcium pyrophosphate) are used, then catalyst structure stability is improved, but 1,3-butadiene selectivity deteriorates
Solution Approach 1:
The patent changes the structural parameter of calcium phosphate from crystalline to amorphous phase, and optimizes the Ca/P molar ratio to 1.20-1.30. This parameter change results in simultaneous improvement of 1,3-butadiene selectivity (60-70%) and catalyst stability, resolving the contradiction between structure stability and product selectivity
Solution Approach 2:
The patent creates a composite catalyst system by combining amorphous calcium phosphate with specific surface area (50-150 m²/g) and controlled pore structure. The composite nature of the amorphous phase with optimized Ca/P ratio provides both structural stability and high selectivity for 1,3-butadiene production
2Ease of manufacture
If existing calcium phosphate catalysts are used, then catalyst preparation simplicity is improved, but catalytic activity and durability deteriorate
Solution Approach 1:
The patent optimizes preparation parameters including pH control (6.0-10.0), temperature (400-600°C), and Ca/P ratio (1.20-1.30) to produce amorphous calcium phosphate with enhanced durability. The simple precipitation method combined with controlled thermal treatment achieves both ease of manufacture and high catalyst reliability
Solution Approach 2:
The patent creates local quality optimization by controlling the amorphous phase structure with specific surface area and pore distribution. This local structural optimization enhances catalytic activity and durability while maintaining simple preparation procedures
3Manufacturing precision
If amorphous calcium phosphate catalyst with Ca/P ratio of 1.20-1.30 is used, then 1,3-butadiene selectivity is improved, but catalyst preparation complexity increases
Solution Approach 1:
The patent establishes specific parameter ranges (Ca/P ratio: 1.20-1.30, pH: 6.0-10.0, temperature: 400-600°C) that simplify the preparation process while achieving high selectivity. The defined parameter window makes the preparation process controllable and reproducible without excessive complexity
Solution Approach 2:
The patent performs preliminary action by pre-determining the optimal Ca/P ratio range and pH conditions before catalyst synthesis. This preliminary optimization of preparation conditions simplifies the actual catalyst making process while ensuring high 1,3-butadiene selectivity
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 amorphous calcium phosphate catalyst exhibits high 2,3-butanediol conversion and 1,3-butadiene selectivity, maintaining high catalytic activity and stability over long-term use, outperforming crystalline calcium phosphate catalysts in selectivity and durability.
Implementation Method 1
reacting a phosphoric acid-containing solution with an alkali and a calcium precursor, followed by thermal treatment
Implementation Method 2
An amorphous calcium phosphate catalyst is prepared by reacting a phosphoric acid-containing solution with an alkali and a calcium precursor
Implementation Method 3
thermally treating the slurry, thus obtaining an amorphous calcium phosphate catalyst
Implementation Method 4
The amorphous calcium phosphate catalyst exhibits high 2,3-butanediol conversion and 1,3-butadiene selectivity
Implementation Method 5
converting 2,3-butanediol produced via fermentation into 1,3-butadiene and methyl ethyl ketone using a catalyst
Data Source
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AI summary
Disclosed are an amorphous calcium phosphate catalyst for use in production of 1,3-butadiene and methyl ethyl ketone from 2,3-butanediol, a preparation method thereof, and a method of producing 1,3-butadiene and methyl ethyl ketone from 2,3-butanediol using the amorphous calcium phosphate catalyst.