Copper-Zinc Alloy Catalyst for Heavy Aldehyde Hydrogenation
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Solution Overview
Problem
Current gas-phase aldehyde hydrogenation catalysts, primarily copper-zinc (Cu-Zn) catalysts, are inadequate for efficiently converting heavy aldehydes, such as 2-propyl-heptaldehyde, with low conversion rates and limited research in this area.
Innovation Solution
A preparation method involving mixing aluminum salts, zinc salts, silica sol, and copper salts with ultrasonic treatment and aging processes to form a copper-zinc alloy catalyst, enhanced with boric acid and graphite, which improves catalytic activity and stability, enabling high conversion rates of heavy aldehydes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional Cu-Zn catalysts are used for heavy aldehyde hydrogenation, then the catalyst structure is simple and easy to manufacture, but the conversion rate of heavy aldehydes is low
Solution Approach 1:
The catalyst preparation is divided into multiple sequential steps: (1) preparing aluminum-zinc-silica precursor by co-precipitation, (2) adding copper salt and zinc powder to form copper-zinc alloy, (3) aging treatment, (4) filtering and drying. This segmentation allows each step to be optimized independently, achieving high conversion rate while maintaining manageable process complexity
Solution Approach 2:
The catalyst employs a composite structure with copper-zinc alloy particles supported on aluminum-zinc-silica carrier. This composite material combines the high catalytic activity of copper-zinc alloy with the high surface area and stability of aluminum-zinc-silica carrier, achieving both high conversion rate and structural stability
2Reliability
If copper-zinc alloy is formed through conventional mixing, then the preparation process is simple, but the dispersion and activity of copper-zinc alloy particles are insufficient
Solution Approach 1:
The aluminum-zinc-silica carrier is prepared in advance through co-precipitation and aging treatment before adding the copper-zinc alloy components. This preliminary action ensures the carrier has optimal surface properties and pore structure, which then facilitates uniform dispersion and stable integration of the copper-zinc alloy particles
Solution Approach 2:
The aluminum-zinc-silica carrier acts as an intermediary that mediates between the copper-zinc alloy particles and the reaction environment. It provides a stable support structure that prevents aggregation of alloy particles while facilitating their catalytic activity, thus improving reliability without complicating the overall preparation process
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 catalyst achieves conversion rates of over 99.98% for octenal and 99.28% for 2-propyl-heptenal, demonstrating improved catalytic performance and efficiency in hydrogenation reactions.
Implementation Method 1
The catalyst achieves conversion rates of over 99.98% for octenal and 99.28% for 2-propyl-heptenal, demonstrating improved catalytic performance and efficiency in hydrogenation reactions
Implementation Method 2
mixing a copper salt, a second zinc salt, a zinc powder and water, and performing an ultrasonic treatment to obtain a second mixed solution
Data Source
AI summary
A gas-phase aldehyde hydrogenation catalyst, a preparation method thereof and an application thereof, where the preparation method includes: mixing an aluminum salt, a first zinc salt, silica sol, a first precipitant and water, and performing a first aging treatment to obtain a first mixed solution; mixing a copper salt, a second zinc salt, a zinc powder and water, and performing an ultrasonic treatment to obtain a second mixed solution; mixing the first mixed solution, the second mixed solution and a second precipitant, and performing a second aging treatment to obtain a third mixed solution; adding boric acid into the third mixed solution, and performing a third aging treatment to obtain a fourth mixed solution; filtering the fourth mixed solution, and sequentially drying and roasting the obtained solid product to obtain a catalyst precursor; mixing and molding the catalyst precursor with a graphite to obtain a gas-phase aldehyde hydrogenation catalyst.