Supported Nickel Catalyst for 1,2-Pentanediol Hydrogenation
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Solution Overview
Problem
Current methods for producing 1,2-pentanediol in China are hindered by high raw material costs, expensive catalysts, low raw material conversion rates, poor product selectivity, and numerous side reactions, limiting the expansion of production scale.
Innovation Solution
A method involving the hydrogenation reduction of 2-hydroxypentanal using a supported nickel-based catalyst, which includes a nickel compound and one or more additional metal compounds, to achieve high yield and selectivity of 1,2-pentanediol with reduced equipment requirements and operational costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional oxidation-hydrolysis method or furfural hydrogenation method is used, then 1,2-pentanediol can be produced, but raw material costs are high and catalyst costs are expensive
Solution Approach 1:
The patent changes the reaction parameters by using a different chemical pathway (hydrogenation of 2-hydroxypentanal instead of oxidation-hydrolysis or furfural hydrogenation), which fundamentally alters the cost structure by using cheaper raw materials and catalysts while maintaining product quality
Solution Approach 2:
The patent employs a nickel-based catalyst that is significantly cheaper than traditional catalysts, accepting that the catalyst may have limited lifespan but compensating through its low cost and high activity, thereby reducing overall manufacturing costs
2Productivity
If conventional catalytic systems are used, then hydrogenation can proceed, but raw material conversion rate is low and product selectivity is poor
Solution Approach 1:
The patent uses a composite catalyst system comprising nickel combined with another metal (such as copper, zinc, or aluminum), creating synergistic effects that enhance both conversion rate and selectivity while suppressing side reactions through the combined properties of the metal components
Solution Approach 2:
The patent modifies the catalyst's local properties by controlling particle size, surface area, and distribution of active sites, creating optimal local environments for hydrogenation that maximize conversion and selectivity while minimizing unwanted side reactions
3Productivity
If high-temperature hydrogenation is used to improve conversion rate, then reaction speed increases, but equipment requirements and operational costs increase
Solution Approach 1:
The patent optimizes reaction parameters including temperature, pressure, and hydrogen-to-substrate ratio to achieve high conversion rates under milder conditions, reducing the need for expensive high-temperature and high-pressure equipment while maintaining reaction efficiency
Solution Approach 2:
The patent replaces mechanical/physical means of achieving high conversion (such as high temperature and pressure) with chemical catalysis using the optimized nickel-based catalyst system, which achieves similar or better results under milder conditions, thereby reducing equipment 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
This method achieves a high feedstock conversion rate of 99% and product selectivity of 98%, significantly reducing production costs and improving product quality, while also simplifying the process and reducing equipment demands.
Implementation Method 1
subjecting 2-hydroxypentanal and hydrogen to hydrogenation reduction under an action of a catalyst to obtain the 1,2-pentanediol; wherein the catalyst is a supported nickel-based catalyst
Implementation Method 2
subjecting 2-hydroxypentanal and hydrogen to hydrogenation reduction under an action of a catalyst to obtain the 1,2-pentanediol
Data Source
AI summary
Provided is a method for preparing 1,2-pentanediol, including subjecting 2-hydroxypentanal and hydrogen to hydrogenation reduction under an action of a catalyst to obtain the 1,2-pentanediol; wherein the catalyst is a supported nickel-based catalyst; the supported nickel-based catalyst comprises a carrier and an active component supported on the carrier; the active component comprises a first component and a second component; the first component is a nickel compound; and the second component is one or more selected from the group consisting of a copper compound, a cobalt compound, a platinum compound, an iridium compound, a rhodium compound, and a rhenium compound.